Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy) |
| 3 | * Copyright (c) 2005 - 2010 CACE Technologies, Davis (California) |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. Neither the name of the Politecnico di Torino, CACE Technologies |
| 16 | * nor the names of its contributors may be used to endorse or promote |
| 17 | * products derived from this software without specific prior written |
| 18 | * permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #ifdef HAVE_CONFIG_H |
| 35 | #include <config.h> |
| 36 | #endif |
| 37 | |
| 38 | #include <errno.h> |
| 39 | #define PCAP_DONT_INCLUDE_PCAP_BPF_H |
| 40 | #include <Packet32.h> |
| 41 | #include <pcap-int.h> |
| 42 | #include <pcap/dlt.h> |
| 43 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 44 | /* |
| 45 | * XXX - Packet32.h defines bpf_program, so we can't include |
| 46 | * <pcap/bpf.h>, which also defines it; that's why we define |
| 47 | * PCAP_DONT_INCLUDE_PCAP_BPF_H, |
| 48 | * |
| 49 | * However, no header in the WinPcap or Npcap SDKs defines the |
| 50 | * macros for BPF code, so we have to define them ourselves. |
| 51 | */ |
| 52 | #define BPF_RET 0x06 |
| 53 | #define BPF_K 0x00 |
| 54 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 55 | /* Old-school MinGW have these headers in a different place. |
| 56 | */ |
| 57 | #if defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR) |
| 58 | #include <ddk/ntddndis.h> |
| 59 | #include <ddk/ndis.h> |
| 60 | #else |
| 61 | #include <ntddndis.h> /* MSVC/TDM-MinGW/MinGW64 */ |
| 62 | #endif |
| 63 | |
| 64 | #ifdef HAVE_DAG_API |
| 65 | #include <dagnew.h> |
| 66 | #include <dagapi.h> |
| 67 | #endif /* HAVE_DAG_API */ |
| 68 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 69 | #include "diag-control.h" |
| 70 | |
| 71 | #include "pcap-airpcap.h" |
| 72 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 73 | static int pcap_setfilter_npf(pcap_t *, struct bpf_program *); |
| 74 | static int pcap_setfilter_win32_dag(pcap_t *, struct bpf_program *); |
| 75 | static int pcap_getnonblock_npf(pcap_t *); |
| 76 | static int pcap_setnonblock_npf(pcap_t *, int); |
| 77 | |
| 78 | /*dimension of the buffer in the pcap_t structure*/ |
| 79 | #define WIN32_DEFAULT_USER_BUFFER_SIZE 256000 |
| 80 | |
| 81 | /*dimension of the buffer in the kernel driver NPF */ |
| 82 | #define WIN32_DEFAULT_KERNEL_BUFFER_SIZE 1000000 |
| 83 | |
| 84 | /* Equivalent to ntohs(), but a lot faster under Windows */ |
| 85 | #define SWAPS(_X) ((_X & 0xff) << 8) | (_X >> 8) |
| 86 | |
| 87 | /* |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 88 | * Private data for capturing on WinPcap/Npcap devices. |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 89 | */ |
| 90 | struct pcap_win { |
| 91 | ADAPTER *adapter; /* the packet32 ADAPTER for the device */ |
| 92 | int nonblock; |
| 93 | int rfmon_selfstart; /* a flag tells whether the monitor mode is set by itself */ |
| 94 | int filtering_in_kernel; /* using kernel filter */ |
| 95 | |
| 96 | #ifdef HAVE_DAG_API |
| 97 | int dag_fcs_bits; /* Number of checksum bits from link layer */ |
| 98 | #endif |
| 99 | |
| 100 | #ifdef ENABLE_REMOTE |
| 101 | int samp_npkt; /* parameter needed for sampling, with '1 out of N' method has been requested */ |
| 102 | struct timeval samp_time; /* parameter needed for sampling, with '1 every N ms' method has been requested */ |
| 103 | #endif |
| 104 | }; |
| 105 | |
| 106 | /* |
| 107 | * Define stub versions of the monitor-mode support routines if this |
| 108 | * isn't Npcap. HAVE_NPCAP_PACKET_API is defined by Npcap but not |
| 109 | * WinPcap. |
| 110 | */ |
| 111 | #ifndef HAVE_NPCAP_PACKET_API |
| 112 | static int |
| 113 | PacketIsMonitorModeSupported(PCHAR AdapterName _U_) |
| 114 | { |
| 115 | /* |
| 116 | * We don't support monitor mode. |
| 117 | */ |
| 118 | return (0); |
| 119 | } |
| 120 | |
| 121 | static int |
| 122 | PacketSetMonitorMode(PCHAR AdapterName _U_, int mode _U_) |
| 123 | { |
| 124 | /* |
| 125 | * This should never be called, as PacketIsMonitorModeSupported() |
| 126 | * will return 0, meaning "we don't support monitor mode, so |
| 127 | * don't try to turn it on or off". |
| 128 | */ |
| 129 | return (0); |
| 130 | } |
| 131 | |
| 132 | static int |
| 133 | PacketGetMonitorMode(PCHAR AdapterName _U_) |
| 134 | { |
| 135 | /* |
| 136 | * This should fail, so that pcap_activate_npf() returns |
| 137 | * PCAP_ERROR_RFMON_NOTSUP if our caller requested monitor |
| 138 | * mode. |
| 139 | */ |
| 140 | return (-1); |
| 141 | } |
| 142 | #endif |
| 143 | |
| 144 | /* |
| 145 | * Sigh. PacketRequest() will have made a DeviceIoControl() |
| 146 | * call to the NPF driver to perform the OID request, with a |
| 147 | * BIOCQUERYOID ioctl. The kernel code should get back one |
| 148 | * of NDIS_STATUS_INVALID_OID, NDIS_STATUS_NOT_SUPPORTED, |
| 149 | * or NDIS_STATUS_NOT_RECOGNIZED if the OID request isn't |
| 150 | * supported by the OS or the driver, but that doesn't seem |
| 151 | * to make it to the caller of PacketRequest() in a |
| 152 | * reliable fashion. |
| 153 | */ |
| 154 | #define NDIS_STATUS_INVALID_OID 0xc0010017 |
| 155 | #define NDIS_STATUS_NOT_SUPPORTED 0xc00000bb /* STATUS_NOT_SUPPORTED */ |
| 156 | #define NDIS_STATUS_NOT_RECOGNIZED 0x00010001 |
| 157 | |
| 158 | static int |
| 159 | oid_get_request(ADAPTER *adapter, bpf_u_int32 oid, void *data, size_t *lenp, |
| 160 | char *errbuf) |
| 161 | { |
| 162 | PACKET_OID_DATA *oid_data_arg; |
| 163 | |
| 164 | /* |
| 165 | * Allocate a PACKET_OID_DATA structure to hand to PacketRequest(). |
| 166 | * It should be big enough to hold "*lenp" bytes of data; it |
| 167 | * will actually be slightly larger, as PACKET_OID_DATA has a |
| 168 | * 1-byte data array at the end, standing in for the variable-length |
| 169 | * data that's actually there. |
| 170 | */ |
| 171 | oid_data_arg = malloc(sizeof (PACKET_OID_DATA) + *lenp); |
| 172 | if (oid_data_arg == NULL) { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 173 | snprintf(errbuf, PCAP_ERRBUF_SIZE, |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 174 | "Couldn't allocate argument buffer for PacketRequest"); |
| 175 | return (PCAP_ERROR); |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * No need to copy the data - we're doing a fetch. |
| 180 | */ |
| 181 | oid_data_arg->Oid = oid; |
| 182 | oid_data_arg->Length = (ULONG)(*lenp); /* XXX - check for ridiculously large value? */ |
| 183 | if (!PacketRequest(adapter, FALSE, oid_data_arg)) { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 184 | pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE, |
| 185 | GetLastError(), "Error calling PacketRequest"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 186 | free(oid_data_arg); |
| 187 | return (-1); |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Get the length actually supplied. |
| 192 | */ |
| 193 | *lenp = oid_data_arg->Length; |
| 194 | |
| 195 | /* |
| 196 | * Copy back the data we fetched. |
| 197 | */ |
| 198 | memcpy(data, oid_data_arg->Data, *lenp); |
| 199 | free(oid_data_arg); |
| 200 | return (0); |
| 201 | } |
| 202 | |
| 203 | static int |
| 204 | pcap_stats_npf(pcap_t *p, struct pcap_stat *ps) |
| 205 | { |
| 206 | struct pcap_win *pw = p->priv; |
| 207 | struct bpf_stat bstats; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 208 | |
| 209 | /* |
| 210 | * Try to get statistics. |
| 211 | * |
| 212 | * (Please note - "struct pcap_stat" is *not* the same as |
| 213 | * WinPcap's "struct bpf_stat". It might currently have the |
| 214 | * same layout, but let's not cheat. |
| 215 | * |
| 216 | * Note also that we don't fill in ps_capt, as we might have |
| 217 | * been called by code compiled against an earlier version of |
| 218 | * WinPcap that didn't have ps_capt, in which case filling it |
| 219 | * in would stomp on whatever comes after the structure passed |
| 220 | * to us. |
| 221 | */ |
| 222 | if (!PacketGetStats(pw->adapter, &bstats)) { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 223 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 224 | GetLastError(), "PacketGetStats error"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 225 | return (-1); |
| 226 | } |
| 227 | ps->ps_recv = bstats.bs_recv; |
| 228 | ps->ps_drop = bstats.bs_drop; |
| 229 | |
| 230 | /* |
| 231 | * XXX - PacketGetStats() doesn't fill this in, so we just |
| 232 | * return 0. |
| 233 | */ |
| 234 | #if 0 |
| 235 | ps->ps_ifdrop = bstats.ps_ifdrop; |
| 236 | #else |
| 237 | ps->ps_ifdrop = 0; |
| 238 | #endif |
| 239 | |
| 240 | return (0); |
| 241 | } |
| 242 | |
| 243 | /* |
| 244 | * Win32-only routine for getting statistics. |
| 245 | * |
| 246 | * This way is definitely safer than passing the pcap_stat * from the userland. |
| 247 | * In fact, there could happen than the user allocates a variable which is not |
| 248 | * big enough for the new structure, and the library will write in a zone |
| 249 | * which is not allocated to this variable. |
| 250 | * |
| 251 | * In this way, we're pretty sure we are writing on memory allocated to this |
| 252 | * variable. |
| 253 | * |
| 254 | * XXX - but this is the wrong way to handle statistics. Instead, we should |
| 255 | * have an API that returns data in a form like the Options section of a |
| 256 | * pcapng Interface Statistics Block: |
| 257 | * |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 258 | * https://xml2rfc.tools.ietf.org/cgi-bin/xml2rfc.cgi?url=https://raw.githubusercontent.com/pcapng/pcapng/master/draft-tuexen-opsawg-pcapng.xml&modeAsFormat=html/ascii&type=ascii#rfc.section.4.6 |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 259 | * |
| 260 | * which would let us add new statistics straightforwardly and indicate which |
| 261 | * statistics we are and are *not* providing, rather than having to provide |
| 262 | * possibly-bogus values for statistics we can't provide. |
| 263 | */ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 264 | static struct pcap_stat * |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 265 | pcap_stats_ex_npf(pcap_t *p, int *pcap_stat_size) |
| 266 | { |
| 267 | struct pcap_win *pw = p->priv; |
| 268 | struct bpf_stat bstats; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 269 | |
| 270 | *pcap_stat_size = sizeof (p->stat); |
| 271 | |
| 272 | /* |
| 273 | * Try to get statistics. |
| 274 | * |
| 275 | * (Please note - "struct pcap_stat" is *not* the same as |
| 276 | * WinPcap's "struct bpf_stat". It might currently have the |
| 277 | * same layout, but let's not cheat.) |
| 278 | */ |
| 279 | if (!PacketGetStatsEx(pw->adapter, &bstats)) { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 280 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 281 | GetLastError(), "PacketGetStatsEx error"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 282 | return (NULL); |
| 283 | } |
| 284 | p->stat.ps_recv = bstats.bs_recv; |
| 285 | p->stat.ps_drop = bstats.bs_drop; |
| 286 | p->stat.ps_ifdrop = bstats.ps_ifdrop; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 287 | /* |
| 288 | * Just in case this is ever compiled for a target other than |
| 289 | * Windows, which is somewhere between extremely unlikely and |
| 290 | * impossible. |
| 291 | */ |
| 292 | #ifdef _WIN32 |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 293 | p->stat.ps_capt = bstats.bs_capt; |
| 294 | #endif |
| 295 | return (&p->stat); |
| 296 | } |
| 297 | |
| 298 | /* Set the dimension of the kernel-level capture buffer */ |
| 299 | static int |
| 300 | pcap_setbuff_npf(pcap_t *p, int dim) |
| 301 | { |
| 302 | struct pcap_win *pw = p->priv; |
| 303 | |
| 304 | if(PacketSetBuff(pw->adapter,dim)==FALSE) |
| 305 | { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 306 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: not enough memory to allocate the kernel buffer"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 307 | return (-1); |
| 308 | } |
| 309 | return (0); |
| 310 | } |
| 311 | |
| 312 | /* Set the driver working mode */ |
| 313 | static int |
| 314 | pcap_setmode_npf(pcap_t *p, int mode) |
| 315 | { |
| 316 | struct pcap_win *pw = p->priv; |
| 317 | |
| 318 | if(PacketSetMode(pw->adapter,mode)==FALSE) |
| 319 | { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 320 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: working mode not recognized"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 321 | return (-1); |
| 322 | } |
| 323 | |
| 324 | return (0); |
| 325 | } |
| 326 | |
| 327 | /*set the minimum amount of data that will release a read call*/ |
| 328 | static int |
| 329 | pcap_setmintocopy_npf(pcap_t *p, int size) |
| 330 | { |
| 331 | struct pcap_win *pw = p->priv; |
| 332 | |
| 333 | if(PacketSetMinToCopy(pw->adapter, size)==FALSE) |
| 334 | { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 335 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: unable to set the requested mintocopy size"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 336 | return (-1); |
| 337 | } |
| 338 | return (0); |
| 339 | } |
| 340 | |
| 341 | static HANDLE |
| 342 | pcap_getevent_npf(pcap_t *p) |
| 343 | { |
| 344 | struct pcap_win *pw = p->priv; |
| 345 | |
| 346 | return (PacketGetReadEvent(pw->adapter)); |
| 347 | } |
| 348 | |
| 349 | static int |
| 350 | pcap_oid_get_request_npf(pcap_t *p, bpf_u_int32 oid, void *data, size_t *lenp) |
| 351 | { |
| 352 | struct pcap_win *pw = p->priv; |
| 353 | |
| 354 | return (oid_get_request(pw->adapter, oid, data, lenp, p->errbuf)); |
| 355 | } |
| 356 | |
| 357 | static int |
| 358 | pcap_oid_set_request_npf(pcap_t *p, bpf_u_int32 oid, const void *data, |
| 359 | size_t *lenp) |
| 360 | { |
| 361 | struct pcap_win *pw = p->priv; |
| 362 | PACKET_OID_DATA *oid_data_arg; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 363 | |
| 364 | /* |
| 365 | * Allocate a PACKET_OID_DATA structure to hand to PacketRequest(). |
| 366 | * It should be big enough to hold "*lenp" bytes of data; it |
| 367 | * will actually be slightly larger, as PACKET_OID_DATA has a |
| 368 | * 1-byte data array at the end, standing in for the variable-length |
| 369 | * data that's actually there. |
| 370 | */ |
| 371 | oid_data_arg = malloc(sizeof (PACKET_OID_DATA) + *lenp); |
| 372 | if (oid_data_arg == NULL) { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 373 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 374 | "Couldn't allocate argument buffer for PacketRequest"); |
| 375 | return (PCAP_ERROR); |
| 376 | } |
| 377 | |
| 378 | oid_data_arg->Oid = oid; |
| 379 | oid_data_arg->Length = (ULONG)(*lenp); /* XXX - check for ridiculously large value? */ |
| 380 | memcpy(oid_data_arg->Data, data, *lenp); |
| 381 | if (!PacketRequest(pw->adapter, TRUE, oid_data_arg)) { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 382 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 383 | GetLastError(), "Error calling PacketRequest"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 384 | free(oid_data_arg); |
| 385 | return (PCAP_ERROR); |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | * Get the length actually copied. |
| 390 | */ |
| 391 | *lenp = oid_data_arg->Length; |
| 392 | |
| 393 | /* |
| 394 | * No need to copy the data - we're doing a set. |
| 395 | */ |
| 396 | free(oid_data_arg); |
| 397 | return (0); |
| 398 | } |
| 399 | |
| 400 | static u_int |
| 401 | pcap_sendqueue_transmit_npf(pcap_t *p, pcap_send_queue *queue, int sync) |
| 402 | { |
| 403 | struct pcap_win *pw = p->priv; |
| 404 | u_int res; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 405 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 406 | res = PacketSendPackets(pw->adapter, |
| 407 | queue->buffer, |
| 408 | queue->len, |
| 409 | (BOOLEAN)sync); |
| 410 | |
| 411 | if(res != queue->len){ |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 412 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 413 | GetLastError(), "Error queueing packets"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | return (res); |
| 417 | } |
| 418 | |
| 419 | static int |
| 420 | pcap_setuserbuffer_npf(pcap_t *p, int size) |
| 421 | { |
| 422 | unsigned char *new_buff; |
| 423 | |
| 424 | if (size<=0) { |
| 425 | /* Bogus parameter */ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 426 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 427 | "Error: invalid size %d",size); |
| 428 | return (-1); |
| 429 | } |
| 430 | |
| 431 | /* Allocate the buffer */ |
| 432 | new_buff=(unsigned char*)malloc(sizeof(char)*size); |
| 433 | |
| 434 | if (!new_buff) { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 435 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 436 | "Error: not enough memory"); |
| 437 | return (-1); |
| 438 | } |
| 439 | |
| 440 | free(p->buffer); |
| 441 | |
| 442 | p->buffer=new_buff; |
| 443 | p->bufsize=size; |
| 444 | |
| 445 | return (0); |
| 446 | } |
| 447 | |
| 448 | static int |
| 449 | pcap_live_dump_npf(pcap_t *p, char *filename, int maxsize, int maxpacks) |
| 450 | { |
| 451 | struct pcap_win *pw = p->priv; |
| 452 | BOOLEAN res; |
| 453 | |
| 454 | /* Set the packet driver in dump mode */ |
| 455 | res = PacketSetMode(pw->adapter, PACKET_MODE_DUMP); |
| 456 | if(res == FALSE){ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 457 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 458 | "Error setting dump mode"); |
| 459 | return (-1); |
| 460 | } |
| 461 | |
| 462 | /* Set the name of the dump file */ |
| 463 | res = PacketSetDumpName(pw->adapter, filename, (int)strlen(filename)); |
| 464 | if(res == FALSE){ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 465 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 466 | "Error setting kernel dump file name"); |
| 467 | return (-1); |
| 468 | } |
| 469 | |
| 470 | /* Set the limits of the dump file */ |
| 471 | res = PacketSetDumpLimits(pw->adapter, maxsize, maxpacks); |
| 472 | if(res == FALSE) { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 473 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
| 474 | "Error setting dump limit"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 475 | return (-1); |
| 476 | } |
| 477 | |
| 478 | return (0); |
| 479 | } |
| 480 | |
| 481 | static int |
| 482 | pcap_live_dump_ended_npf(pcap_t *p, int sync) |
| 483 | { |
| 484 | struct pcap_win *pw = p->priv; |
| 485 | |
| 486 | return (PacketIsDumpEnded(pw->adapter, (BOOLEAN)sync)); |
| 487 | } |
| 488 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 489 | #ifdef HAVE_AIRPCAP_API |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 490 | static PAirpcapHandle |
| 491 | pcap_get_airpcap_handle_npf(pcap_t *p) |
| 492 | { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 493 | struct pcap_win *pw = p->priv; |
| 494 | |
| 495 | return (PacketGetAirPcapHandle(pw->adapter)); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 496 | } |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 497 | #else /* HAVE_AIRPCAP_API */ |
| 498 | static PAirpcapHandle |
| 499 | pcap_get_airpcap_handle_npf(pcap_t *p _U_) |
| 500 | { |
| 501 | return (NULL); |
| 502 | } |
| 503 | #endif /* HAVE_AIRPCAP_API */ |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 504 | |
| 505 | static int |
| 506 | pcap_read_npf(pcap_t *p, int cnt, pcap_handler callback, u_char *user) |
| 507 | { |
| 508 | PACKET Packet; |
| 509 | int cc; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 510 | int n; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 511 | register u_char *bp, *ep; |
| 512 | u_char *datap; |
| 513 | struct pcap_win *pw = p->priv; |
| 514 | |
| 515 | cc = p->cc; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 516 | if (cc == 0) { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 517 | /* |
| 518 | * Has "pcap_breakloop()" been called? |
| 519 | */ |
| 520 | if (p->break_loop) { |
| 521 | /* |
| 522 | * Yes - clear the flag that indicates that it |
| 523 | * has, and return PCAP_ERROR_BREAK to indicate |
| 524 | * that we were told to break out of the loop. |
| 525 | */ |
| 526 | p->break_loop = 0; |
| 527 | return (PCAP_ERROR_BREAK); |
| 528 | } |
| 529 | |
| 530 | /* |
| 531 | * Capture the packets. |
| 532 | * |
| 533 | * The PACKET structure had a bunch of extra stuff for |
| 534 | * Windows 9x/Me, but the only interesting data in it |
| 535 | * in the versions of Windows that we support is just |
| 536 | * a copy of p->buffer, a copy of p->buflen, and the |
| 537 | * actual number of bytes read returned from |
| 538 | * PacketReceivePacket(), none of which has to be |
| 539 | * retained from call to call, so we just keep one on |
| 540 | * the stack. |
| 541 | */ |
| 542 | PacketInitPacket(&Packet, (BYTE *)p->buffer, p->bufsize); |
| 543 | if (!PacketReceivePacket(pw->adapter, &Packet, TRUE)) { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 544 | /* |
| 545 | * Did the device go away? |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 546 | * If so, the error we get can either be |
| 547 | * ERROR_GEN_FAILURE or ERROR_DEVICE_REMOVED. |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 548 | */ |
| 549 | DWORD errcode = GetLastError(); |
| 550 | |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 551 | if (errcode == ERROR_GEN_FAILURE || |
| 552 | errcode == ERROR_DEVICE_REMOVED) { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 553 | /* |
| 554 | * The device on which we're capturing |
| 555 | * went away, or it became unusable |
| 556 | * by NPF due to a suspend/resume. |
| 557 | * |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 558 | * ERROR_GEN_FAILURE comes from |
| 559 | * STATUS_UNSUCCESSFUL, as well as some |
| 560 | * other NT status codes that the Npcap |
| 561 | * driver is unlikely to return. |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 562 | * XXX - hopefully no other error |
| 563 | * conditions are indicated by this. |
| 564 | * |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 565 | * ERROR_DEVICE_REMOVED comes from |
| 566 | * STATUS_DEVICE_REMOVED. |
| 567 | * |
| 568 | * We report the Windows status code |
| 569 | * name and the corresponding NT status |
| 570 | * code name, for the benefit of attempts |
| 571 | * to debug cases where this error is |
| 572 | * reported when the device *wasn't* |
| 573 | * removed, either because it's not |
| 574 | * removable, it's removable but wasn't |
| 575 | * removed, or it's a device that doesn't |
| 576 | * correspond to a physical device. |
| 577 | * |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 578 | * XXX - we really should return an |
| 579 | * appropriate error for that, but |
| 580 | * pcap_dispatch() etc. aren't |
| 581 | * documented as having error returns |
| 582 | * other than PCAP_ERROR or PCAP_ERROR_BREAK. |
| 583 | */ |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 584 | const char *errcode_msg; |
| 585 | |
| 586 | if (errcode == ERROR_GEN_FAILURE) |
| 587 | errcode_msg = "ERROR_GEN_FAILURE/STATUS_UNSUCCESSFUL"; |
| 588 | else |
| 589 | errcode_msg = "ERROR_DEVICE_REMOVED/STATUS_DEVICE_REMOVED"; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 590 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 591 | "The interface disappeared (error code %s)", |
| 592 | errcode_msg); |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 593 | } else { |
| 594 | pcap_fmt_errmsg_for_win32_err(p->errbuf, |
| 595 | PCAP_ERRBUF_SIZE, errcode, |
| 596 | "PacketReceivePacket error"); |
| 597 | } |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 598 | return (PCAP_ERROR); |
| 599 | } |
| 600 | |
| 601 | cc = Packet.ulBytesReceived; |
| 602 | |
| 603 | bp = p->buffer; |
| 604 | } |
| 605 | else |
| 606 | bp = p->bp; |
| 607 | |
| 608 | /* |
| 609 | * Loop through each packet. |
| 610 | */ |
| 611 | #define bhp ((struct bpf_hdr *)bp) |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 612 | n = 0; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 613 | ep = bp + cc; |
| 614 | for (;;) { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 615 | register u_int caplen, hdrlen; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 616 | |
| 617 | /* |
| 618 | * Has "pcap_breakloop()" been called? |
| 619 | * If so, return immediately - if we haven't read any |
| 620 | * packets, clear the flag and return PCAP_ERROR_BREAK |
| 621 | * to indicate that we were told to break out of the loop, |
| 622 | * otherwise leave the flag set, so that the *next* call |
| 623 | * will break out of the loop without having read any |
| 624 | * packets, and return the number of packets we've |
| 625 | * processed so far. |
| 626 | */ |
| 627 | if (p->break_loop) { |
| 628 | if (n == 0) { |
| 629 | p->break_loop = 0; |
| 630 | return (PCAP_ERROR_BREAK); |
| 631 | } else { |
| 632 | p->bp = bp; |
| 633 | p->cc = (int) (ep - bp); |
| 634 | return (n); |
| 635 | } |
| 636 | } |
| 637 | if (bp >= ep) |
| 638 | break; |
| 639 | |
| 640 | caplen = bhp->bh_caplen; |
| 641 | hdrlen = bhp->bh_hdrlen; |
| 642 | datap = bp + hdrlen; |
| 643 | |
| 644 | /* |
| 645 | * Short-circuit evaluation: if using BPF filter |
| 646 | * in kernel, no need to do it now - we already know |
| 647 | * the packet passed the filter. |
| 648 | * |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 649 | * XXX - pcap_filter() should always return TRUE if |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 650 | * handed a null pointer for the program, but it might |
| 651 | * just try to "run" the filter, so we check here. |
| 652 | */ |
| 653 | if (pw->filtering_in_kernel || |
| 654 | p->fcode.bf_insns == NULL || |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 655 | pcap_filter(p->fcode.bf_insns, datap, bhp->bh_datalen, caplen)) { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 656 | #ifdef ENABLE_REMOTE |
| 657 | switch (p->rmt_samp.method) { |
| 658 | |
| 659 | case PCAP_SAMP_1_EVERY_N: |
| 660 | pw->samp_npkt = (pw->samp_npkt + 1) % p->rmt_samp.value; |
| 661 | |
| 662 | /* Discard all packets that are not '1 out of N' */ |
| 663 | if (pw->samp_npkt != 0) { |
| 664 | bp += Packet_WORDALIGN(caplen + hdrlen); |
| 665 | continue; |
| 666 | } |
| 667 | break; |
| 668 | |
| 669 | case PCAP_SAMP_FIRST_AFTER_N_MS: |
| 670 | { |
| 671 | struct pcap_pkthdr *pkt_header = (struct pcap_pkthdr*) bp; |
| 672 | |
| 673 | /* |
| 674 | * Check if the timestamp of the arrived |
| 675 | * packet is smaller than our target time. |
| 676 | */ |
| 677 | if (pkt_header->ts.tv_sec < pw->samp_time.tv_sec || |
| 678 | (pkt_header->ts.tv_sec == pw->samp_time.tv_sec && pkt_header->ts.tv_usec < pw->samp_time.tv_usec)) { |
| 679 | bp += Packet_WORDALIGN(caplen + hdrlen); |
| 680 | continue; |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * The arrived packet is suitable for being |
| 685 | * delivered to our caller, so let's update |
| 686 | * the target time. |
| 687 | */ |
| 688 | pw->samp_time.tv_usec = pkt_header->ts.tv_usec + p->rmt_samp.value * 1000; |
| 689 | if (pw->samp_time.tv_usec > 1000000) { |
| 690 | pw->samp_time.tv_sec = pkt_header->ts.tv_sec + pw->samp_time.tv_usec / 1000000; |
| 691 | pw->samp_time.tv_usec = pw->samp_time.tv_usec % 1000000; |
| 692 | } |
| 693 | } |
| 694 | } |
| 695 | #endif /* ENABLE_REMOTE */ |
| 696 | |
| 697 | /* |
| 698 | * XXX A bpf_hdr matches a pcap_pkthdr. |
| 699 | */ |
| 700 | (*callback)(user, (struct pcap_pkthdr*)bp, datap); |
| 701 | bp += Packet_WORDALIGN(caplen + hdrlen); |
| 702 | if (++n >= cnt && !PACKET_COUNT_IS_UNLIMITED(cnt)) { |
| 703 | p->bp = bp; |
| 704 | p->cc = (int) (ep - bp); |
| 705 | return (n); |
| 706 | } |
| 707 | } else { |
| 708 | /* |
| 709 | * Skip this packet. |
| 710 | */ |
| 711 | bp += Packet_WORDALIGN(caplen + hdrlen); |
| 712 | } |
| 713 | } |
| 714 | #undef bhp |
| 715 | p->cc = 0; |
| 716 | return (n); |
| 717 | } |
| 718 | |
| 719 | #ifdef HAVE_DAG_API |
| 720 | static int |
| 721 | pcap_read_win32_dag(pcap_t *p, int cnt, pcap_handler callback, u_char *user) |
| 722 | { |
| 723 | struct pcap_win *pw = p->priv; |
| 724 | PACKET Packet; |
| 725 | u_char *dp = NULL; |
| 726 | int packet_len = 0, caplen = 0; |
| 727 | struct pcap_pkthdr pcap_header; |
| 728 | u_char *endofbuf; |
| 729 | int n = 0; |
| 730 | dag_record_t *header; |
| 731 | unsigned erf_record_len; |
| 732 | ULONGLONG ts; |
| 733 | int cc; |
| 734 | unsigned swt; |
| 735 | unsigned dfp = pw->adapter->DagFastProcess; |
| 736 | |
| 737 | cc = p->cc; |
| 738 | if (cc == 0) /* Get new packets only if we have processed all the ones of the previous read */ |
| 739 | { |
| 740 | /* |
| 741 | * Get new packets from the network. |
| 742 | * |
| 743 | * The PACKET structure had a bunch of extra stuff for |
| 744 | * Windows 9x/Me, but the only interesting data in it |
| 745 | * in the versions of Windows that we support is just |
| 746 | * a copy of p->buffer, a copy of p->buflen, and the |
| 747 | * actual number of bytes read returned from |
| 748 | * PacketReceivePacket(), none of which has to be |
| 749 | * retained from call to call, so we just keep one on |
| 750 | * the stack. |
| 751 | */ |
| 752 | PacketInitPacket(&Packet, (BYTE *)p->buffer, p->bufsize); |
| 753 | if (!PacketReceivePacket(pw->adapter, &Packet, TRUE)) { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 754 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "read error: PacketReceivePacket failed"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 755 | return (-1); |
| 756 | } |
| 757 | |
| 758 | cc = Packet.ulBytesReceived; |
| 759 | if(cc == 0) |
| 760 | /* The timeout has expired but we no packets arrived */ |
| 761 | return (0); |
| 762 | header = (dag_record_t*)pw->adapter->DagBuffer; |
| 763 | } |
| 764 | else |
| 765 | header = (dag_record_t*)p->bp; |
| 766 | |
| 767 | endofbuf = (char*)header + cc; |
| 768 | |
| 769 | /* |
| 770 | * Cycle through the packets |
| 771 | */ |
| 772 | do |
| 773 | { |
| 774 | erf_record_len = SWAPS(header->rlen); |
| 775 | if((char*)header + erf_record_len > endofbuf) |
| 776 | break; |
| 777 | |
| 778 | /* Increase the number of captured packets */ |
| 779 | p->stat.ps_recv++; |
| 780 | |
| 781 | /* Find the beginning of the packet */ |
| 782 | dp = ((u_char *)header) + dag_record_size; |
| 783 | |
| 784 | /* Determine actual packet len */ |
| 785 | switch(header->type) |
| 786 | { |
| 787 | case TYPE_ATM: |
| 788 | packet_len = ATM_SNAPLEN; |
| 789 | caplen = ATM_SNAPLEN; |
| 790 | dp += 4; |
| 791 | |
| 792 | break; |
| 793 | |
| 794 | case TYPE_ETH: |
| 795 | swt = SWAPS(header->wlen); |
| 796 | packet_len = swt - (pw->dag_fcs_bits); |
| 797 | caplen = erf_record_len - dag_record_size - 2; |
| 798 | if (caplen > packet_len) |
| 799 | { |
| 800 | caplen = packet_len; |
| 801 | } |
| 802 | dp += 2; |
| 803 | |
| 804 | break; |
| 805 | |
| 806 | case TYPE_HDLC_POS: |
| 807 | swt = SWAPS(header->wlen); |
| 808 | packet_len = swt - (pw->dag_fcs_bits); |
| 809 | caplen = erf_record_len - dag_record_size; |
| 810 | if (caplen > packet_len) |
| 811 | { |
| 812 | caplen = packet_len; |
| 813 | } |
| 814 | |
| 815 | break; |
| 816 | } |
| 817 | |
| 818 | if(caplen > p->snapshot) |
| 819 | caplen = p->snapshot; |
| 820 | |
| 821 | /* |
| 822 | * Has "pcap_breakloop()" been called? |
| 823 | * If so, return immediately - if we haven't read any |
| 824 | * packets, clear the flag and return -2 to indicate |
| 825 | * that we were told to break out of the loop, otherwise |
| 826 | * leave the flag set, so that the *next* call will break |
| 827 | * out of the loop without having read any packets, and |
| 828 | * return the number of packets we've processed so far. |
| 829 | */ |
| 830 | if (p->break_loop) |
| 831 | { |
| 832 | if (n == 0) |
| 833 | { |
| 834 | p->break_loop = 0; |
| 835 | return (-2); |
| 836 | } |
| 837 | else |
| 838 | { |
| 839 | p->bp = (char*)header; |
| 840 | p->cc = endofbuf - (char*)header; |
| 841 | return (n); |
| 842 | } |
| 843 | } |
| 844 | |
| 845 | if(!dfp) |
| 846 | { |
| 847 | /* convert between timestamp formats */ |
| 848 | ts = header->ts; |
| 849 | pcap_header.ts.tv_sec = (int)(ts >> 32); |
| 850 | ts = (ts & 0xffffffffi64) * 1000000; |
| 851 | ts += 0x80000000; /* rounding */ |
| 852 | pcap_header.ts.tv_usec = (int)(ts >> 32); |
| 853 | if (pcap_header.ts.tv_usec >= 1000000) { |
| 854 | pcap_header.ts.tv_usec -= 1000000; |
| 855 | pcap_header.ts.tv_sec++; |
| 856 | } |
| 857 | } |
| 858 | |
| 859 | /* No underlaying filtering system. We need to filter on our own */ |
| 860 | if (p->fcode.bf_insns) |
| 861 | { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 862 | if (pcap_filter(p->fcode.bf_insns, dp, packet_len, caplen) == 0) |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 863 | { |
| 864 | /* Move to next packet */ |
| 865 | header = (dag_record_t*)((char*)header + erf_record_len); |
| 866 | continue; |
| 867 | } |
| 868 | } |
| 869 | |
| 870 | /* Fill the header for the user suppplied callback function */ |
| 871 | pcap_header.caplen = caplen; |
| 872 | pcap_header.len = packet_len; |
| 873 | |
| 874 | /* Call the callback function */ |
| 875 | (*callback)(user, &pcap_header, dp); |
| 876 | |
| 877 | /* Move to next packet */ |
| 878 | header = (dag_record_t*)((char*)header + erf_record_len); |
| 879 | |
| 880 | /* Stop if the number of packets requested by user has been reached*/ |
| 881 | if (++n >= cnt && !PACKET_COUNT_IS_UNLIMITED(cnt)) |
| 882 | { |
| 883 | p->bp = (char*)header; |
| 884 | p->cc = endofbuf - (char*)header; |
| 885 | return (n); |
| 886 | } |
| 887 | } |
| 888 | while((u_char*)header < endofbuf); |
| 889 | |
| 890 | return (1); |
| 891 | } |
| 892 | #endif /* HAVE_DAG_API */ |
| 893 | |
| 894 | /* Send a packet to the network */ |
| 895 | static int |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 896 | pcap_inject_npf(pcap_t *p, const void *buf, int size) |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 897 | { |
| 898 | struct pcap_win *pw = p->priv; |
| 899 | PACKET pkt; |
| 900 | |
| 901 | PacketInitPacket(&pkt, (PVOID)buf, size); |
| 902 | if(PacketSendPacket(pw->adapter,&pkt,TRUE) == FALSE) { |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 903 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 904 | GetLastError(), "send error: PacketSendPacket failed"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 905 | return (-1); |
| 906 | } |
| 907 | |
| 908 | /* |
| 909 | * We assume it all got sent if "PacketSendPacket()" succeeded. |
| 910 | * "pcap_inject()" is expected to return the number of bytes |
| 911 | * sent. |
| 912 | */ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 913 | return (size); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 914 | } |
| 915 | |
| 916 | static void |
| 917 | pcap_cleanup_npf(pcap_t *p) |
| 918 | { |
| 919 | struct pcap_win *pw = p->priv; |
| 920 | |
| 921 | if (pw->adapter != NULL) { |
| 922 | PacketCloseAdapter(pw->adapter); |
| 923 | pw->adapter = NULL; |
| 924 | } |
| 925 | if (pw->rfmon_selfstart) |
| 926 | { |
| 927 | PacketSetMonitorMode(p->opt.device, 0); |
| 928 | } |
| 929 | pcap_cleanup_live_common(p); |
| 930 | } |
| 931 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 932 | static void |
| 933 | pcap_breakloop_npf(pcap_t *p) |
| 934 | { |
| 935 | pcap_breakloop_common(p); |
| 936 | struct pcap_win *pw = p->priv; |
| 937 | |
| 938 | /* XXX - what if this fails? */ |
| 939 | SetEvent(PacketGetReadEvent(pw->adapter)); |
| 940 | } |
| 941 | |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 942 | /* |
| 943 | * Vendor-specific error codes. |
| 944 | * |
| 945 | * These are NTSTATUS values: |
| 946 | * |
| 947 | * https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/87fba13e-bf06-450e-83b1-9241dc81e781 |
| 948 | * |
| 949 | * with the "Customer" bit set. If a driver returns them, they are not |
| 950 | * mapped to Windows error values in userland; they're returned by |
| 951 | * GetLastError(). |
| 952 | * |
| 953 | * Attempting to set non-promiscuous mode on a Microsoft Surface Pro's |
| 954 | * Mobile Broadband Adapter returns an error; that error can safely be |
| 955 | * ignored, as it's always in non-promiscuous mode. |
| 956 | * |
| 957 | * It is likely that there are other devices which throw spurious errors, |
| 958 | * at which point this will need refactoring to efficiently check against |
| 959 | * a list, but for now we can just check this one value. |
| 960 | */ |
| 961 | #define NPF_SURFACE_MOBILE_NONPROMISC 0xe00000bb |
| 962 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 963 | static int |
| 964 | pcap_activate_npf(pcap_t *p) |
| 965 | { |
| 966 | struct pcap_win *pw = p->priv; |
| 967 | NetType type; |
| 968 | int res; |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 969 | int status = 0; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 970 | struct bpf_insn total_insn; |
| 971 | struct bpf_program total_prog; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 972 | |
| 973 | if (p->opt.rfmon) { |
| 974 | /* |
| 975 | * Monitor mode is supported on Windows Vista and later. |
| 976 | */ |
| 977 | if (PacketGetMonitorMode(p->opt.device) == 1) |
| 978 | { |
| 979 | pw->rfmon_selfstart = 0; |
| 980 | } |
| 981 | else |
| 982 | { |
| 983 | if ((res = PacketSetMonitorMode(p->opt.device, 1)) != 1) |
| 984 | { |
| 985 | pw->rfmon_selfstart = 0; |
| 986 | // Monitor mode is not supported. |
| 987 | if (res == 0) |
| 988 | { |
| 989 | return PCAP_ERROR_RFMON_NOTSUP; |
| 990 | } |
| 991 | else |
| 992 | { |
| 993 | return PCAP_ERROR; |
| 994 | } |
| 995 | } |
| 996 | else |
| 997 | { |
| 998 | pw->rfmon_selfstart = 1; |
| 999 | } |
| 1000 | } |
| 1001 | } |
| 1002 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1003 | /* Init Winsock if it hasn't already been initialized */ |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1004 | pcap_wsockinit(); |
| 1005 | |
| 1006 | pw->adapter = PacketOpenAdapter(p->opt.device); |
| 1007 | |
| 1008 | if (pw->adapter == NULL) |
| 1009 | { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1010 | DWORD errcode = GetLastError(); |
| 1011 | |
| 1012 | /* |
| 1013 | * What error did we get when trying to open the adapter? |
| 1014 | */ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1015 | switch (errcode) { |
| 1016 | |
| 1017 | case ERROR_BAD_UNIT: |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1018 | /* |
| 1019 | * There's no such device. |
| 1020 | */ |
| 1021 | return (PCAP_ERROR_NO_SUCH_DEVICE); |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1022 | |
| 1023 | case ERROR_ACCESS_DENIED: |
| 1024 | /* |
| 1025 | * There is, but we don't have permission to |
| 1026 | * use it. |
| 1027 | */ |
| 1028 | return (PCAP_ERROR_PERM_DENIED); |
| 1029 | |
| 1030 | default: |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1031 | /* |
| 1032 | * Unknown - report details. |
| 1033 | */ |
| 1034 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1035 | errcode, "Error opening adapter"); |
| 1036 | if (pw->rfmon_selfstart) |
| 1037 | { |
| 1038 | PacketSetMonitorMode(p->opt.device, 0); |
| 1039 | } |
| 1040 | return (PCAP_ERROR); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1041 | } |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1042 | } |
| 1043 | |
| 1044 | /*get network type*/ |
| 1045 | if(PacketGetNetType (pw->adapter,&type) == FALSE) |
| 1046 | { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1047 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1048 | GetLastError(), "Cannot determine the network type"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1049 | goto bad; |
| 1050 | } |
| 1051 | |
| 1052 | /*Set the linktype*/ |
| 1053 | switch (type.LinkType) |
| 1054 | { |
| 1055 | case NdisMediumWan: |
| 1056 | p->linktype = DLT_EN10MB; |
| 1057 | break; |
| 1058 | |
| 1059 | case NdisMedium802_3: |
| 1060 | p->linktype = DLT_EN10MB; |
| 1061 | /* |
| 1062 | * This is (presumably) a real Ethernet capture; give it a |
| 1063 | * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so |
| 1064 | * that an application can let you choose it, in case you're |
| 1065 | * capturing DOCSIS traffic that a Cisco Cable Modem |
| 1066 | * Termination System is putting out onto an Ethernet (it |
| 1067 | * doesn't put an Ethernet header onto the wire, it puts raw |
| 1068 | * DOCSIS frames out on the wire inside the low-level |
| 1069 | * Ethernet framing). |
| 1070 | */ |
| 1071 | p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2); |
| 1072 | /* |
| 1073 | * If that fails, just leave the list empty. |
| 1074 | */ |
| 1075 | if (p->dlt_list != NULL) { |
| 1076 | p->dlt_list[0] = DLT_EN10MB; |
| 1077 | p->dlt_list[1] = DLT_DOCSIS; |
| 1078 | p->dlt_count = 2; |
| 1079 | } |
| 1080 | break; |
| 1081 | |
| 1082 | case NdisMediumFddi: |
| 1083 | p->linktype = DLT_FDDI; |
| 1084 | break; |
| 1085 | |
| 1086 | case NdisMedium802_5: |
| 1087 | p->linktype = DLT_IEEE802; |
| 1088 | break; |
| 1089 | |
| 1090 | case NdisMediumArcnetRaw: |
| 1091 | p->linktype = DLT_ARCNET; |
| 1092 | break; |
| 1093 | |
| 1094 | case NdisMediumArcnet878_2: |
| 1095 | p->linktype = DLT_ARCNET; |
| 1096 | break; |
| 1097 | |
| 1098 | case NdisMediumAtm: |
| 1099 | p->linktype = DLT_ATM_RFC1483; |
| 1100 | break; |
| 1101 | |
| 1102 | case NdisMediumCHDLC: |
| 1103 | p->linktype = DLT_CHDLC; |
| 1104 | break; |
| 1105 | |
| 1106 | case NdisMediumPPPSerial: |
| 1107 | p->linktype = DLT_PPP_SERIAL; |
| 1108 | break; |
| 1109 | |
| 1110 | case NdisMediumNull: |
| 1111 | p->linktype = DLT_NULL; |
| 1112 | break; |
| 1113 | |
| 1114 | case NdisMediumBare80211: |
| 1115 | p->linktype = DLT_IEEE802_11; |
| 1116 | break; |
| 1117 | |
| 1118 | case NdisMediumRadio80211: |
| 1119 | p->linktype = DLT_IEEE802_11_RADIO; |
| 1120 | break; |
| 1121 | |
| 1122 | case NdisMediumPpi: |
| 1123 | p->linktype = DLT_PPI; |
| 1124 | break; |
| 1125 | |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1126 | case NdisMediumWirelessWan: |
| 1127 | p->linktype = DLT_RAW; |
| 1128 | break; |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1129 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1130 | default: |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1131 | /* |
| 1132 | * An unknown medium type is assumed to supply Ethernet |
| 1133 | * headers; if not, the user will have to report it, |
| 1134 | * so that the medium type and link-layer header type |
| 1135 | * can be determined. If we were to fail here, we |
| 1136 | * might get the link-layer type in the error, but |
| 1137 | * the user wouldn't get a capture, so we wouldn't |
| 1138 | * be able to determine the link-layer type; we report |
| 1139 | * a warning with the link-layer type, so at least |
| 1140 | * some programs will report the warning. |
| 1141 | */ |
| 1142 | p->linktype = DLT_EN10MB; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1143 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1144 | "Unknown NdisMedium value %d, defaulting to DLT_EN10MB", |
| 1145 | type.LinkType); |
| 1146 | status = PCAP_WARNING; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1147 | break; |
| 1148 | } |
| 1149 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1150 | #ifdef HAVE_PACKET_GET_TIMESTAMP_MODES |
| 1151 | /* |
| 1152 | * Set the timestamp type. |
| 1153 | * (Yes, we require PacketGetTimestampModes(), not just |
| 1154 | * PacketSetTimestampMode(). If we have the former, we |
| 1155 | * have the latter, unless somebody's using a version |
| 1156 | * of Npcap that they've hacked to provide the former |
| 1157 | * but not the latter; if they've done that, either |
| 1158 | * they're confused or they're trolling us.) |
| 1159 | */ |
| 1160 | switch (p->opt.tstamp_type) { |
| 1161 | |
| 1162 | case PCAP_TSTAMP_HOST_HIPREC_UNSYNCED: |
| 1163 | /* |
| 1164 | * Better than low-res, but *not* synchronized with |
| 1165 | * the OS clock. |
| 1166 | */ |
| 1167 | if (!PacketSetTimestampMode(pw->adapter, TIMESTAMPMODE_SINGLE_SYNCHRONIZATION)) |
| 1168 | { |
| 1169 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1170 | GetLastError(), "Cannot set the time stamp mode to TIMESTAMPMODE_SINGLE_SYNCHRONIZATION"); |
| 1171 | goto bad; |
| 1172 | } |
| 1173 | break; |
| 1174 | |
| 1175 | case PCAP_TSTAMP_HOST_LOWPREC: |
| 1176 | /* |
| 1177 | * Low-res, but synchronized with the OS clock. |
| 1178 | */ |
| 1179 | if (!PacketSetTimestampMode(pw->adapter, TIMESTAMPMODE_QUERYSYSTEMTIME)) |
| 1180 | { |
| 1181 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1182 | GetLastError(), "Cannot set the time stamp mode to TIMESTAMPMODE_QUERYSYSTEMTIME"); |
| 1183 | goto bad; |
| 1184 | } |
| 1185 | break; |
| 1186 | |
| 1187 | case PCAP_TSTAMP_HOST_HIPREC: |
| 1188 | /* |
| 1189 | * High-res, and synchronized with the OS clock. |
| 1190 | */ |
| 1191 | if (!PacketSetTimestampMode(pw->adapter, TIMESTAMPMODE_QUERYSYSTEMTIME_PRECISE)) |
| 1192 | { |
| 1193 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1194 | GetLastError(), "Cannot set the time stamp mode to TIMESTAMPMODE_QUERYSYSTEMTIME_PRECISE"); |
| 1195 | goto bad; |
| 1196 | } |
| 1197 | break; |
| 1198 | |
| 1199 | case PCAP_TSTAMP_HOST: |
| 1200 | /* |
| 1201 | * XXX - do whatever the default is, for now. |
| 1202 | * Set to the highest resolution that's synchronized |
| 1203 | * with the system clock? |
| 1204 | */ |
| 1205 | break; |
| 1206 | } |
| 1207 | #endif /* HAVE_PACKET_GET_TIMESTAMP_MODES */ |
| 1208 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1209 | /* |
| 1210 | * Turn a negative snapshot value (invalid), a snapshot value of |
| 1211 | * 0 (unspecified), or a value bigger than the normal maximum |
| 1212 | * value, into the maximum allowed value. |
| 1213 | * |
| 1214 | * If some application really *needs* a bigger snapshot |
| 1215 | * length, we should just increase MAXIMUM_SNAPLEN. |
| 1216 | */ |
| 1217 | if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN) |
| 1218 | p->snapshot = MAXIMUM_SNAPLEN; |
| 1219 | |
| 1220 | /* Set promiscuous mode */ |
| 1221 | if (p->opt.promisc) |
| 1222 | { |
| 1223 | |
| 1224 | if (PacketSetHwFilter(pw->adapter,NDIS_PACKET_TYPE_PROMISCUOUS) == FALSE) |
| 1225 | { |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 1226 | DWORD errcode = GetLastError(); |
| 1227 | |
| 1228 | /* |
| 1229 | * Suppress spurious error generated by non-compiant |
| 1230 | * MS Surface mobile adapters. |
| 1231 | * |
| 1232 | * If we knew that this meant "promiscuous mode |
| 1233 | * isn't supported", we could add a "promiscuous |
| 1234 | * mode isn't supported" error code and return |
| 1235 | * that, but: |
| 1236 | * |
| 1237 | * 1) we don't know that it means that |
| 1238 | * rather than meaning "we reject attempts |
| 1239 | * to set the filter, even though the NDIS |
| 1240 | * specifications say you shouldn't do that" |
| 1241 | * |
| 1242 | * and |
| 1243 | * |
| 1244 | * 2) other interface types that don't |
| 1245 | * support promiscuous mode, at least |
| 1246 | * on UN*Xes, just silently ignore |
| 1247 | * attempts to set promiscuous mode |
| 1248 | * |
| 1249 | * and rejecting it with an error could disrupt |
| 1250 | * attempts to capture, as many programs (tcpdump, |
| 1251 | * *shark) default to promiscuous mode. |
| 1252 | */ |
| 1253 | if (errcode != NPF_SURFACE_MOBILE_NONPROMISC) |
| 1254 | { |
| 1255 | pcap_fmt_errmsg_for_win32_err(p->errbuf, |
| 1256 | PCAP_ERRBUF_SIZE, errcode, |
| 1257 | "failed to set hardware filter to promiscuous mode"); |
| 1258 | goto bad; |
| 1259 | } |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1260 | } |
| 1261 | } |
| 1262 | else |
| 1263 | { |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 1264 | /* |
| 1265 | * NDIS_PACKET_TYPE_ALL_LOCAL selects "All packets sent by |
| 1266 | * installed protocols and all packets indicated by the NIC", |
| 1267 | * but if no protocol drivers (like TCP/IP) are installed, |
| 1268 | * NDIS_PACKET_TYPE_DIRECTED, NDIS_PACKET_TYPE_BROADCAST, |
| 1269 | * and NDIS_PACKET_TYPE_MULTICAST are needed to capture |
| 1270 | * incoming frames. |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1271 | */ |
| 1272 | if (PacketSetHwFilter(pw->adapter, |
| 1273 | NDIS_PACKET_TYPE_ALL_LOCAL | |
| 1274 | NDIS_PACKET_TYPE_DIRECTED | |
| 1275 | NDIS_PACKET_TYPE_BROADCAST | |
| 1276 | NDIS_PACKET_TYPE_MULTICAST) == FALSE) |
| 1277 | { |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 1278 | DWORD errcode = GetLastError(); |
| 1279 | |
| 1280 | /* |
| 1281 | * Suppress spurious error generated by non-compiant |
| 1282 | * MS Surface mobile adapters. |
| 1283 | */ |
| 1284 | if (errcode != NPF_SURFACE_MOBILE_NONPROMISC) |
| 1285 | { |
| 1286 | pcap_fmt_errmsg_for_win32_err(p->errbuf, |
| 1287 | PCAP_ERRBUF_SIZE, errcode, |
| 1288 | "failed to set hardware filter to non-promiscuous mode"); |
| 1289 | goto bad; |
| 1290 | } |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1291 | } |
| 1292 | } |
| 1293 | |
| 1294 | /* Set the buffer size */ |
| 1295 | p->bufsize = WIN32_DEFAULT_USER_BUFFER_SIZE; |
| 1296 | |
| 1297 | if(!(pw->adapter->Flags & INFO_FLAG_DAG_CARD)) |
| 1298 | { |
| 1299 | /* |
| 1300 | * Traditional Adapter |
| 1301 | */ |
| 1302 | /* |
| 1303 | * If the buffer size wasn't explicitly set, default to |
| 1304 | * WIN32_DEFAULT_KERNEL_BUFFER_SIZE. |
| 1305 | */ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1306 | if (p->opt.buffer_size == 0) |
| 1307 | p->opt.buffer_size = WIN32_DEFAULT_KERNEL_BUFFER_SIZE; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1308 | |
| 1309 | if(PacketSetBuff(pw->adapter,p->opt.buffer_size)==FALSE) |
| 1310 | { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1311 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: not enough memory to allocate the kernel buffer"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1312 | goto bad; |
| 1313 | } |
| 1314 | |
| 1315 | p->buffer = malloc(p->bufsize); |
| 1316 | if (p->buffer == NULL) |
| 1317 | { |
| 1318 | pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1319 | errno, "malloc"); |
| 1320 | goto bad; |
| 1321 | } |
| 1322 | |
| 1323 | if (p->opt.immediate) |
| 1324 | { |
| 1325 | /* tell the driver to copy the buffer as soon as data arrives */ |
| 1326 | if(PacketSetMinToCopy(pw->adapter,0)==FALSE) |
| 1327 | { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1328 | pcap_fmt_errmsg_for_win32_err(p->errbuf, |
| 1329 | PCAP_ERRBUF_SIZE, GetLastError(), |
| 1330 | "Error calling PacketSetMinToCopy"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1331 | goto bad; |
| 1332 | } |
| 1333 | } |
| 1334 | else |
| 1335 | { |
| 1336 | /* tell the driver to copy the buffer only if it contains at least 16K */ |
| 1337 | if(PacketSetMinToCopy(pw->adapter,16000)==FALSE) |
| 1338 | { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1339 | pcap_fmt_errmsg_for_win32_err(p->errbuf, |
| 1340 | PCAP_ERRBUF_SIZE, GetLastError(), |
| 1341 | "Error calling PacketSetMinToCopy"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1342 | goto bad; |
| 1343 | } |
| 1344 | } |
| 1345 | } else { |
| 1346 | /* |
| 1347 | * Dag Card |
| 1348 | */ |
| 1349 | #ifdef HAVE_DAG_API |
| 1350 | /* |
| 1351 | * We have DAG support. |
| 1352 | */ |
| 1353 | LONG status; |
| 1354 | HKEY dagkey; |
| 1355 | DWORD lptype; |
| 1356 | DWORD lpcbdata; |
| 1357 | int postype = 0; |
| 1358 | char keyname[512]; |
| 1359 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1360 | snprintf(keyname, sizeof(keyname), "%s\\CardParams\\%s", |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1361 | "SYSTEM\\CurrentControlSet\\Services\\DAG", |
| 1362 | strstr(_strlwr(p->opt.device), "dag")); |
| 1363 | do |
| 1364 | { |
| 1365 | status = RegOpenKeyEx(HKEY_LOCAL_MACHINE, keyname, 0, KEY_READ, &dagkey); |
| 1366 | if(status != ERROR_SUCCESS) |
| 1367 | break; |
| 1368 | |
| 1369 | status = RegQueryValueEx(dagkey, |
| 1370 | "PosType", |
| 1371 | NULL, |
| 1372 | &lptype, |
| 1373 | (char*)&postype, |
| 1374 | &lpcbdata); |
| 1375 | |
| 1376 | if(status != ERROR_SUCCESS) |
| 1377 | { |
| 1378 | postype = 0; |
| 1379 | } |
| 1380 | |
| 1381 | RegCloseKey(dagkey); |
| 1382 | } |
| 1383 | while(FALSE); |
| 1384 | |
| 1385 | |
| 1386 | p->snapshot = PacketSetSnapLen(pw->adapter, p->snapshot); |
| 1387 | |
| 1388 | /* Set the length of the FCS associated to any packet. This value |
| 1389 | * will be subtracted to the packet length */ |
| 1390 | pw->dag_fcs_bits = pw->adapter->DagFcsLen; |
| 1391 | #else /* HAVE_DAG_API */ |
| 1392 | /* |
| 1393 | * No DAG support. |
| 1394 | */ |
| 1395 | goto bad; |
| 1396 | #endif /* HAVE_DAG_API */ |
| 1397 | } |
| 1398 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1399 | /* |
| 1400 | * If there's no filter program installed, there's |
| 1401 | * no indication to the kernel of what the snapshot |
| 1402 | * length should be, so no snapshotting is done. |
| 1403 | * |
| 1404 | * Therefore, when we open the device, we install |
| 1405 | * an "accept everything" filter with the specified |
| 1406 | * snapshot length. |
| 1407 | */ |
| 1408 | total_insn.code = (u_short)(BPF_RET | BPF_K); |
| 1409 | total_insn.jt = 0; |
| 1410 | total_insn.jf = 0; |
| 1411 | total_insn.k = p->snapshot; |
| 1412 | |
| 1413 | total_prog.bf_len = 1; |
| 1414 | total_prog.bf_insns = &total_insn; |
| 1415 | if (!PacketSetBpf(pw->adapter, &total_prog)) { |
| 1416 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1417 | GetLastError(), "PacketSetBpf"); |
| 1418 | status = PCAP_ERROR; |
| 1419 | goto bad; |
| 1420 | } |
| 1421 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1422 | PacketSetReadTimeout(pw->adapter, p->opt.timeout); |
| 1423 | |
| 1424 | /* disable loopback capture if requested */ |
| 1425 | if (p->opt.nocapture_local) |
| 1426 | { |
| 1427 | if (!PacketSetLoopbackBehavior(pw->adapter, NPF_DISABLE_LOOPBACK)) |
| 1428 | { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1429 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1430 | "Unable to disable the capture of loopback packets."); |
| 1431 | goto bad; |
| 1432 | } |
| 1433 | } |
| 1434 | |
| 1435 | #ifdef HAVE_DAG_API |
| 1436 | if(pw->adapter->Flags & INFO_FLAG_DAG_CARD) |
| 1437 | { |
| 1438 | /* install dag specific handlers for read and setfilter */ |
| 1439 | p->read_op = pcap_read_win32_dag; |
| 1440 | p->setfilter_op = pcap_setfilter_win32_dag; |
| 1441 | } |
| 1442 | else |
| 1443 | { |
| 1444 | #endif /* HAVE_DAG_API */ |
| 1445 | /* install traditional npf handlers for read and setfilter */ |
| 1446 | p->read_op = pcap_read_npf; |
| 1447 | p->setfilter_op = pcap_setfilter_npf; |
| 1448 | #ifdef HAVE_DAG_API |
| 1449 | } |
| 1450 | #endif /* HAVE_DAG_API */ |
| 1451 | p->setdirection_op = NULL; /* Not implemented. */ |
| 1452 | /* XXX - can this be implemented on some versions of Windows? */ |
| 1453 | p->inject_op = pcap_inject_npf; |
| 1454 | p->set_datalink_op = NULL; /* can't change data link type */ |
| 1455 | p->getnonblock_op = pcap_getnonblock_npf; |
| 1456 | p->setnonblock_op = pcap_setnonblock_npf; |
| 1457 | p->stats_op = pcap_stats_npf; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1458 | p->breakloop_op = pcap_breakloop_npf; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1459 | p->stats_ex_op = pcap_stats_ex_npf; |
| 1460 | p->setbuff_op = pcap_setbuff_npf; |
| 1461 | p->setmode_op = pcap_setmode_npf; |
| 1462 | p->setmintocopy_op = pcap_setmintocopy_npf; |
| 1463 | p->getevent_op = pcap_getevent_npf; |
| 1464 | p->oid_get_request_op = pcap_oid_get_request_npf; |
| 1465 | p->oid_set_request_op = pcap_oid_set_request_npf; |
| 1466 | p->sendqueue_transmit_op = pcap_sendqueue_transmit_npf; |
| 1467 | p->setuserbuffer_op = pcap_setuserbuffer_npf; |
| 1468 | p->live_dump_op = pcap_live_dump_npf; |
| 1469 | p->live_dump_ended_op = pcap_live_dump_ended_npf; |
| 1470 | p->get_airpcap_handle_op = pcap_get_airpcap_handle_npf; |
| 1471 | p->cleanup_op = pcap_cleanup_npf; |
| 1472 | |
| 1473 | /* |
| 1474 | * XXX - this is only done because WinPcap supported |
| 1475 | * pcap_fileno() returning the hFile HANDLE from the |
| 1476 | * ADAPTER structure. We make no general guarantees |
| 1477 | * that the caller can do anything useful with it. |
| 1478 | * |
| 1479 | * (Not that we make any general guarantee of that |
| 1480 | * sort on UN*X, either, any more, given that not |
| 1481 | * all capture devices are regular OS network |
| 1482 | * interfaces.) |
| 1483 | */ |
| 1484 | p->handle = pw->adapter->hFile; |
| 1485 | |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1486 | return (status); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1487 | bad: |
| 1488 | pcap_cleanup_npf(p); |
| 1489 | return (PCAP_ERROR); |
| 1490 | } |
| 1491 | |
| 1492 | /* |
| 1493 | * Check if rfmon mode is supported on the pcap_t for Windows systems. |
| 1494 | */ |
| 1495 | static int |
| 1496 | pcap_can_set_rfmon_npf(pcap_t *p) |
| 1497 | { |
| 1498 | return (PacketIsMonitorModeSupported(p->opt.device) == 1); |
| 1499 | } |
| 1500 | |
| 1501 | pcap_t * |
| 1502 | pcap_create_interface(const char *device _U_, char *ebuf) |
| 1503 | { |
| 1504 | pcap_t *p; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1505 | #ifdef HAVE_PACKET_GET_TIMESTAMP_MODES |
| 1506 | char *device_copy; |
| 1507 | ADAPTER *adapter; |
| 1508 | ULONG num_ts_modes; |
| 1509 | BOOL ret; |
| 1510 | DWORD error; |
| 1511 | ULONG *modes; |
| 1512 | #endif |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1513 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1514 | p = PCAP_CREATE_COMMON(ebuf, struct pcap_win); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1515 | if (p == NULL) |
| 1516 | return (NULL); |
| 1517 | |
| 1518 | p->activate_op = pcap_activate_npf; |
| 1519 | p->can_set_rfmon_op = pcap_can_set_rfmon_npf; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1520 | |
| 1521 | #ifdef HAVE_PACKET_GET_TIMESTAMP_MODES |
| 1522 | /* |
| 1523 | * First, find out how many time stamp modes we have. |
| 1524 | * To do that, we have to open the adapter. |
| 1525 | * |
| 1526 | * XXX - PacketOpenAdapter() takes a non-const pointer |
| 1527 | * as an argument, so we make a copy of the argument and |
| 1528 | * pass that to it. |
| 1529 | */ |
| 1530 | device_copy = strdup(device); |
| 1531 | adapter = PacketOpenAdapter(device_copy); |
| 1532 | free(device_copy); |
| 1533 | if (adapter != NULL) |
| 1534 | { |
| 1535 | /* |
| 1536 | * Get the total number of time stamp modes. |
| 1537 | * |
| 1538 | * The buffer for PacketGetTimestampModes() is |
| 1539 | * a sequence of 1 or more ULONGs. What's |
| 1540 | * passed to PacketGetTimestampModes() should have |
| 1541 | * the total number of ULONGs in the first ULONG; |
| 1542 | * what's returned *from* PacketGetTimestampModes() |
| 1543 | * has the total number of time stamp modes in |
| 1544 | * the first ULONG. |
| 1545 | * |
| 1546 | * Yes, that means if there are N time stamp |
| 1547 | * modes, the first ULONG should be set to N+1 |
| 1548 | * on input, and will be set to N on output. |
| 1549 | * |
| 1550 | * We first make a call to PacketGetTimestampModes() |
| 1551 | * with a pointer to a single ULONG set to 1; the |
| 1552 | * call should fail with ERROR_MORE_DATA (unless |
| 1553 | * there are *no* modes, but that should never |
| 1554 | * happen), and that ULONG should be set to the |
| 1555 | * number of modes. |
| 1556 | */ |
| 1557 | num_ts_modes = 1; |
| 1558 | ret = PacketGetTimestampModes(adapter, &num_ts_modes); |
| 1559 | if (!ret) { |
| 1560 | /* |
| 1561 | * OK, it failed. Did it fail with |
| 1562 | * ERROR_MORE_DATA? |
| 1563 | */ |
| 1564 | error = GetLastError(); |
| 1565 | if (error != ERROR_MORE_DATA) { |
| 1566 | /* |
| 1567 | * No, some other error. Fail. |
| 1568 | */ |
| 1569 | pcap_fmt_errmsg_for_win32_err(ebuf, |
| 1570 | PCAP_ERRBUF_SIZE, GetLastError(), |
| 1571 | "Error calling PacketGetTimestampModes"); |
| 1572 | pcap_close(p); |
| 1573 | return (NULL); |
| 1574 | } |
| 1575 | |
| 1576 | /* |
| 1577 | * Yes, so we now know how many types to fetch. |
| 1578 | * |
| 1579 | * The buffer needs to have one ULONG for the |
| 1580 | * count and num_ts_modes ULONGs for the |
| 1581 | * num_ts_modes time stamp types. |
| 1582 | */ |
| 1583 | modes = (ULONG *)malloc((1 + num_ts_modes) * sizeof(ULONG)); |
| 1584 | if (modes == NULL) { |
| 1585 | /* Out of memory. */ |
| 1586 | /* XXX SET ebuf */ |
| 1587 | pcap_close(p); |
| 1588 | return (NULL); |
| 1589 | } |
| 1590 | modes[0] = 1 + num_ts_modes; |
| 1591 | if (!PacketGetTimestampModes(adapter, modes)) { |
| 1592 | pcap_fmt_errmsg_for_win32_err(ebuf, |
| 1593 | PCAP_ERRBUF_SIZE, GetLastError(), |
| 1594 | "Error calling PacketGetTimestampModes"); |
| 1595 | free(modes); |
| 1596 | pcap_close(p); |
| 1597 | return (NULL); |
| 1598 | } |
| 1599 | if (modes[0] != num_ts_modes) { |
| 1600 | snprintf(ebuf, PCAP_ERRBUF_SIZE, |
Elliott Hughes | 773b27c | 2021-08-20 17:37:36 -0700 | [diff] [blame] | 1601 | "First PacketGetTimestampModes() call gives %lu modes, second call gives %lu modes", |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1602 | num_ts_modes, modes[0]); |
| 1603 | free(modes); |
| 1604 | pcap_close(p); |
| 1605 | return (NULL); |
| 1606 | } |
| 1607 | if (num_ts_modes != 0) { |
| 1608 | u_int num_ts_types; |
| 1609 | |
| 1610 | /* |
| 1611 | * Allocate a buffer big enough for |
| 1612 | * PCAP_TSTAMP_HOST (default) plus |
| 1613 | * the explicitly specified modes. |
| 1614 | */ |
| 1615 | p->tstamp_type_list = malloc((1 + modes[0]) * sizeof(u_int)); |
| 1616 | if (p->tstamp_type_list == NULL) { |
| 1617 | /* XXX SET ebuf */ |
| 1618 | free(modes); |
| 1619 | pcap_close(p); |
| 1620 | return (NULL); |
| 1621 | } |
| 1622 | num_ts_types = 0; |
| 1623 | p->tstamp_type_list[num_ts_types] = |
| 1624 | PCAP_TSTAMP_HOST; |
| 1625 | num_ts_types++; |
| 1626 | for (ULONG i = 0; i < modes[0]; i++) { |
| 1627 | switch (modes[i + 1]) { |
| 1628 | |
| 1629 | case TIMESTAMPMODE_SINGLE_SYNCHRONIZATION: |
| 1630 | /* |
| 1631 | * Better than low-res, |
| 1632 | * but *not* synchronized |
| 1633 | * with the OS clock. |
| 1634 | */ |
| 1635 | p->tstamp_type_list[num_ts_types] = |
| 1636 | PCAP_TSTAMP_HOST_HIPREC_UNSYNCED; |
| 1637 | num_ts_types++; |
| 1638 | break; |
| 1639 | |
| 1640 | case TIMESTAMPMODE_QUERYSYSTEMTIME: |
| 1641 | /* |
| 1642 | * Low-res, but synchronized |
| 1643 | * with the OS clock. |
| 1644 | */ |
| 1645 | p->tstamp_type_list[num_ts_types] = |
| 1646 | PCAP_TSTAMP_HOST_LOWPREC; |
| 1647 | num_ts_types++; |
| 1648 | break; |
| 1649 | |
| 1650 | case TIMESTAMPMODE_QUERYSYSTEMTIME_PRECISE: |
| 1651 | /* |
| 1652 | * High-res, and synchronized |
| 1653 | * with the OS clock. |
| 1654 | */ |
| 1655 | p->tstamp_type_list[num_ts_types] = |
| 1656 | PCAP_TSTAMP_HOST_HIPREC; |
| 1657 | num_ts_types++; |
| 1658 | break; |
| 1659 | |
| 1660 | default: |
| 1661 | /* |
| 1662 | * Unknown, so we can't |
| 1663 | * report it. |
| 1664 | */ |
| 1665 | break; |
| 1666 | } |
| 1667 | } |
| 1668 | p->tstamp_type_count = num_ts_types; |
| 1669 | free(modes); |
| 1670 | } |
| 1671 | } |
| 1672 | PacketCloseAdapter(adapter); |
| 1673 | } |
| 1674 | #endif /* HAVE_PACKET_GET_TIMESTAMP_MODES */ |
| 1675 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1676 | return (p); |
| 1677 | } |
| 1678 | |
| 1679 | static int |
| 1680 | pcap_setfilter_npf(pcap_t *p, struct bpf_program *fp) |
| 1681 | { |
| 1682 | struct pcap_win *pw = p->priv; |
| 1683 | |
| 1684 | if(PacketSetBpf(pw->adapter,fp)==FALSE){ |
| 1685 | /* |
| 1686 | * Kernel filter not installed. |
| 1687 | * |
| 1688 | * XXX - we don't know whether this failed because: |
| 1689 | * |
| 1690 | * the kernel rejected the filter program as invalid, |
| 1691 | * in which case we should fall back on userland |
| 1692 | * filtering; |
| 1693 | * |
| 1694 | * the kernel rejected the filter program as too big, |
| 1695 | * in which case we should again fall back on |
| 1696 | * userland filtering; |
| 1697 | * |
| 1698 | * there was some other problem, in which case we |
| 1699 | * should probably report an error. |
| 1700 | * |
| 1701 | * For NPF devices, the Win32 status will be |
| 1702 | * STATUS_INVALID_DEVICE_REQUEST for invalid |
| 1703 | * filters, but I don't know what it'd be for |
| 1704 | * other problems, and for some other devices |
| 1705 | * it might not be set at all. |
| 1706 | * |
| 1707 | * So we just fall back on userland filtering in |
| 1708 | * all cases. |
| 1709 | */ |
| 1710 | |
| 1711 | /* |
| 1712 | * install_bpf_program() validates the program. |
| 1713 | * |
| 1714 | * XXX - what if we already have a filter in the kernel? |
| 1715 | */ |
| 1716 | if (install_bpf_program(p, fp) < 0) |
| 1717 | return (-1); |
| 1718 | pw->filtering_in_kernel = 0; /* filtering in userland */ |
| 1719 | return (0); |
| 1720 | } |
| 1721 | |
| 1722 | /* |
| 1723 | * It worked. |
| 1724 | */ |
| 1725 | pw->filtering_in_kernel = 1; /* filtering in the kernel */ |
| 1726 | |
| 1727 | /* |
| 1728 | * Discard any previously-received packets, as they might have |
| 1729 | * passed whatever filter was formerly in effect, but might |
| 1730 | * not pass this filter (BIOCSETF discards packets buffered |
| 1731 | * in the kernel, so you can lose packets in any case). |
| 1732 | */ |
| 1733 | p->cc = 0; |
| 1734 | return (0); |
| 1735 | } |
| 1736 | |
| 1737 | /* |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1738 | * We filter at user level, since the kernel driver doesn't process the packets |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1739 | */ |
| 1740 | static int |
| 1741 | pcap_setfilter_win32_dag(pcap_t *p, struct bpf_program *fp) { |
| 1742 | |
| 1743 | if(!fp) |
| 1744 | { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1745 | pcap_strlcpy(p->errbuf, "setfilter: No filter specified", sizeof(p->errbuf)); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1746 | return (-1); |
| 1747 | } |
| 1748 | |
| 1749 | /* Install a user level filter */ |
| 1750 | if (install_bpf_program(p, fp) < 0) |
| 1751 | return (-1); |
| 1752 | |
| 1753 | return (0); |
| 1754 | } |
| 1755 | |
| 1756 | static int |
| 1757 | pcap_getnonblock_npf(pcap_t *p) |
| 1758 | { |
| 1759 | struct pcap_win *pw = p->priv; |
| 1760 | |
| 1761 | /* |
| 1762 | * XXX - if there were a PacketGetReadTimeout() call, we |
| 1763 | * would use it, and return 1 if the timeout is -1 |
| 1764 | * and 0 otherwise. |
| 1765 | */ |
| 1766 | return (pw->nonblock); |
| 1767 | } |
| 1768 | |
| 1769 | static int |
| 1770 | pcap_setnonblock_npf(pcap_t *p, int nonblock) |
| 1771 | { |
| 1772 | struct pcap_win *pw = p->priv; |
| 1773 | int newtimeout; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1774 | |
| 1775 | if (nonblock) { |
| 1776 | /* |
| 1777 | * Set the packet buffer timeout to -1 for non-blocking |
| 1778 | * mode. |
| 1779 | */ |
| 1780 | newtimeout = -1; |
| 1781 | } else { |
| 1782 | /* |
| 1783 | * Restore the timeout set when the device was opened. |
| 1784 | * (Note that this may be -1, in which case we're not |
| 1785 | * really leaving non-blocking mode. However, although |
| 1786 | * the timeout argument to pcap_set_timeout() and |
| 1787 | * pcap_open_live() is an int, you're not supposed to |
| 1788 | * supply a negative value, so that "shouldn't happen".) |
| 1789 | */ |
| 1790 | newtimeout = p->opt.timeout; |
| 1791 | } |
| 1792 | if (!PacketSetReadTimeout(pw->adapter, newtimeout)) { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 1793 | pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1794 | GetLastError(), "PacketSetReadTimeout"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1795 | return (-1); |
| 1796 | } |
| 1797 | pw->nonblock = (newtimeout == -1); |
| 1798 | return (0); |
| 1799 | } |
| 1800 | |
| 1801 | static int |
| 1802 | pcap_add_if_npf(pcap_if_list_t *devlistp, char *name, bpf_u_int32 flags, |
| 1803 | const char *description, char *errbuf) |
| 1804 | { |
| 1805 | pcap_if_t *curdev; |
| 1806 | npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES]; |
| 1807 | LONG if_addr_size; |
| 1808 | int res = 0; |
| 1809 | |
| 1810 | if_addr_size = MAX_NETWORK_ADDRESSES; |
| 1811 | |
| 1812 | /* |
| 1813 | * Add an entry for this interface, with no addresses. |
| 1814 | */ |
| 1815 | curdev = add_dev(devlistp, name, flags, description, errbuf); |
| 1816 | if (curdev == NULL) { |
| 1817 | /* |
| 1818 | * Failure. |
| 1819 | */ |
| 1820 | return (-1); |
| 1821 | } |
| 1822 | |
| 1823 | /* |
| 1824 | * Get the list of addresses for the interface. |
| 1825 | */ |
| 1826 | if (!PacketGetNetInfoEx((void *)name, if_addrs, &if_addr_size)) { |
| 1827 | /* |
| 1828 | * Failure. |
| 1829 | * |
| 1830 | * We don't return an error, because this can happen with |
| 1831 | * NdisWan interfaces, and we want to supply them even |
| 1832 | * if we can't supply their addresses. |
| 1833 | * |
| 1834 | * We return an entry with an empty address list. |
| 1835 | */ |
| 1836 | return (0); |
| 1837 | } |
| 1838 | |
| 1839 | /* |
| 1840 | * Now add the addresses. |
| 1841 | */ |
| 1842 | while (if_addr_size-- > 0) { |
| 1843 | /* |
| 1844 | * "curdev" is an entry for this interface; add an entry for |
| 1845 | * this address to its list of addresses. |
| 1846 | */ |
| 1847 | res = add_addr_to_dev(curdev, |
| 1848 | (struct sockaddr *)&if_addrs[if_addr_size].IPAddress, |
| 1849 | sizeof (struct sockaddr_storage), |
| 1850 | (struct sockaddr *)&if_addrs[if_addr_size].SubnetMask, |
| 1851 | sizeof (struct sockaddr_storage), |
| 1852 | (struct sockaddr *)&if_addrs[if_addr_size].Broadcast, |
| 1853 | sizeof (struct sockaddr_storage), |
| 1854 | NULL, |
| 1855 | 0, |
| 1856 | errbuf); |
| 1857 | if (res == -1) { |
| 1858 | /* |
| 1859 | * Failure. |
| 1860 | */ |
| 1861 | break; |
| 1862 | } |
| 1863 | } |
| 1864 | |
| 1865 | return (res); |
| 1866 | } |
| 1867 | |
| 1868 | static int |
| 1869 | get_if_flags(const char *name, bpf_u_int32 *flags, char *errbuf) |
| 1870 | { |
| 1871 | char *name_copy; |
| 1872 | ADAPTER *adapter; |
| 1873 | int status; |
| 1874 | size_t len; |
| 1875 | NDIS_HARDWARE_STATUS hardware_status; |
| 1876 | #ifdef OID_GEN_PHYSICAL_MEDIUM |
| 1877 | NDIS_PHYSICAL_MEDIUM phys_medium; |
| 1878 | bpf_u_int32 gen_physical_medium_oids[] = { |
| 1879 | #ifdef OID_GEN_PHYSICAL_MEDIUM_EX |
| 1880 | OID_GEN_PHYSICAL_MEDIUM_EX, |
| 1881 | #endif |
| 1882 | OID_GEN_PHYSICAL_MEDIUM |
| 1883 | }; |
| 1884 | #define N_GEN_PHYSICAL_MEDIUM_OIDS (sizeof gen_physical_medium_oids / sizeof gen_physical_medium_oids[0]) |
| 1885 | size_t i; |
| 1886 | #endif /* OID_GEN_PHYSICAL_MEDIUM */ |
| 1887 | #ifdef OID_GEN_LINK_STATE |
| 1888 | NDIS_LINK_STATE link_state; |
| 1889 | #endif |
| 1890 | int connect_status; |
| 1891 | |
| 1892 | if (*flags & PCAP_IF_LOOPBACK) { |
| 1893 | /* |
| 1894 | * Loopback interface, so the connection status doesn't |
| 1895 | * apply. and it's not wireless (or wired, for that |
| 1896 | * matter...). We presume it's up and running. |
| 1897 | */ |
| 1898 | *flags |= PCAP_IF_UP | PCAP_IF_RUNNING | PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE; |
| 1899 | return (0); |
| 1900 | } |
| 1901 | |
| 1902 | /* |
| 1903 | * We need to open the adapter to get this information. |
| 1904 | * |
| 1905 | * XXX - PacketOpenAdapter() takes a non-const pointer |
| 1906 | * as an argument, so we make a copy of the argument and |
| 1907 | * pass that to it. |
| 1908 | */ |
| 1909 | name_copy = strdup(name); |
| 1910 | adapter = PacketOpenAdapter(name_copy); |
| 1911 | free(name_copy); |
| 1912 | if (adapter == NULL) { |
| 1913 | /* |
| 1914 | * Give up; if they try to open this device, it'll fail. |
| 1915 | */ |
| 1916 | return (0); |
| 1917 | } |
| 1918 | |
| 1919 | #ifdef HAVE_AIRPCAP_API |
| 1920 | /* |
| 1921 | * Airpcap.sys do not support the below 'OID_GEN_x' values. |
| 1922 | * Just set these flags (and none of the '*flags' entered with). |
| 1923 | */ |
| 1924 | if (PacketGetAirPcapHandle(adapter)) { |
| 1925 | /* |
| 1926 | * Must be "up" and "running" if the above if succeeded. |
| 1927 | */ |
| 1928 | *flags = PCAP_IF_UP | PCAP_IF_RUNNING; |
| 1929 | |
| 1930 | /* |
| 1931 | * An airpcap device is a wireless device (duh!) |
| 1932 | */ |
| 1933 | *flags |= PCAP_IF_WIRELESS; |
| 1934 | |
| 1935 | /* |
| 1936 | * A "network assosiation state" makes no sense for airpcap. |
| 1937 | */ |
| 1938 | *flags |= PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE; |
| 1939 | PacketCloseAdapter(adapter); |
| 1940 | return (0); |
| 1941 | } |
| 1942 | #endif |
| 1943 | |
| 1944 | /* |
| 1945 | * Get the hardware status, and derive "up" and "running" from |
| 1946 | * that. |
| 1947 | */ |
| 1948 | len = sizeof (hardware_status); |
| 1949 | status = oid_get_request(adapter, OID_GEN_HARDWARE_STATUS, |
| 1950 | &hardware_status, &len, errbuf); |
| 1951 | if (status == 0) { |
| 1952 | switch (hardware_status) { |
| 1953 | |
| 1954 | case NdisHardwareStatusReady: |
| 1955 | /* |
| 1956 | * "Available and capable of sending and receiving |
| 1957 | * data over the wire", so up and running. |
| 1958 | */ |
| 1959 | *flags |= PCAP_IF_UP | PCAP_IF_RUNNING; |
| 1960 | break; |
| 1961 | |
| 1962 | case NdisHardwareStatusInitializing: |
| 1963 | case NdisHardwareStatusReset: |
| 1964 | /* |
| 1965 | * "Initializing" or "Resetting", so up, but |
| 1966 | * not running. |
| 1967 | */ |
| 1968 | *flags |= PCAP_IF_UP; |
| 1969 | break; |
| 1970 | |
| 1971 | case NdisHardwareStatusClosing: |
| 1972 | case NdisHardwareStatusNotReady: |
| 1973 | /* |
| 1974 | * "Closing" or "Not ready", so neither up nor |
| 1975 | * running. |
| 1976 | */ |
| 1977 | break; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 1978 | |
| 1979 | default: |
| 1980 | /* |
| 1981 | * Unknown. |
| 1982 | */ |
| 1983 | break; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 1984 | } |
| 1985 | } else { |
| 1986 | /* |
| 1987 | * Can't get the hardware status, so assume both up and |
| 1988 | * running. |
| 1989 | */ |
| 1990 | *flags |= PCAP_IF_UP | PCAP_IF_RUNNING; |
| 1991 | } |
| 1992 | |
| 1993 | /* |
| 1994 | * Get the network type. |
| 1995 | */ |
| 1996 | #ifdef OID_GEN_PHYSICAL_MEDIUM |
| 1997 | /* |
| 1998 | * Try the OIDs we have for this, in order. |
| 1999 | */ |
| 2000 | for (i = 0; i < N_GEN_PHYSICAL_MEDIUM_OIDS; i++) { |
| 2001 | len = sizeof (phys_medium); |
| 2002 | status = oid_get_request(adapter, gen_physical_medium_oids[i], |
| 2003 | &phys_medium, &len, errbuf); |
| 2004 | if (status == 0) { |
| 2005 | /* |
| 2006 | * Success. |
| 2007 | */ |
| 2008 | break; |
| 2009 | } |
| 2010 | /* |
| 2011 | * Failed. We can't determine whether it failed |
| 2012 | * because that particular OID isn't supported |
| 2013 | * or because some other problem occurred, so we |
| 2014 | * just drive on and try the next OID. |
| 2015 | */ |
| 2016 | } |
| 2017 | if (status == 0) { |
| 2018 | /* |
| 2019 | * We got the physical medium. |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2020 | * |
| 2021 | * XXX - we might want to check for NdisPhysicalMediumWiMax |
| 2022 | * and NdisPhysicalMediumNative802_15_4 being |
| 2023 | * part of the enum, and check for those in the "wireless" |
| 2024 | * case. |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2025 | */ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2026 | DIAG_OFF_ENUM_SWITCH |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2027 | switch (phys_medium) { |
| 2028 | |
| 2029 | case NdisPhysicalMediumWirelessLan: |
| 2030 | case NdisPhysicalMediumWirelessWan: |
| 2031 | case NdisPhysicalMediumNative802_11: |
| 2032 | case NdisPhysicalMediumBluetooth: |
| 2033 | case NdisPhysicalMediumUWB: |
| 2034 | case NdisPhysicalMediumIrda: |
| 2035 | /* |
| 2036 | * Wireless. |
| 2037 | */ |
| 2038 | *flags |= PCAP_IF_WIRELESS; |
| 2039 | break; |
| 2040 | |
| 2041 | default: |
| 2042 | /* |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2043 | * Not wireless or unknown |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2044 | */ |
| 2045 | break; |
| 2046 | } |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2047 | DIAG_ON_ENUM_SWITCH |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2048 | } |
| 2049 | #endif |
| 2050 | |
| 2051 | /* |
| 2052 | * Get the connection status. |
| 2053 | */ |
| 2054 | #ifdef OID_GEN_LINK_STATE |
| 2055 | len = sizeof(link_state); |
| 2056 | status = oid_get_request(adapter, OID_GEN_LINK_STATE, &link_state, |
| 2057 | &len, errbuf); |
| 2058 | if (status == 0) { |
| 2059 | /* |
| 2060 | * NOTE: this also gives us the receive and transmit |
| 2061 | * link state. |
| 2062 | */ |
| 2063 | switch (link_state.MediaConnectState) { |
| 2064 | |
| 2065 | case MediaConnectStateConnected: |
| 2066 | /* |
| 2067 | * It's connected. |
| 2068 | */ |
| 2069 | *flags |= PCAP_IF_CONNECTION_STATUS_CONNECTED; |
| 2070 | break; |
| 2071 | |
| 2072 | case MediaConnectStateDisconnected: |
| 2073 | /* |
| 2074 | * It's disconnected. |
| 2075 | */ |
| 2076 | *flags |= PCAP_IF_CONNECTION_STATUS_DISCONNECTED; |
| 2077 | break; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2078 | |
| 2079 | case MediaConnectStateUnknown: |
| 2080 | default: |
| 2081 | /* |
| 2082 | * It's unknown whether it's connected or not. |
| 2083 | */ |
| 2084 | break; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2085 | } |
| 2086 | } |
| 2087 | #else |
| 2088 | /* |
| 2089 | * OID_GEN_LINK_STATE isn't supported because it's not in our SDK. |
| 2090 | */ |
| 2091 | status = -1; |
| 2092 | #endif |
| 2093 | if (status == -1) { |
| 2094 | /* |
| 2095 | * OK, OID_GEN_LINK_STATE didn't work, try |
| 2096 | * OID_GEN_MEDIA_CONNECT_STATUS. |
| 2097 | */ |
| 2098 | status = oid_get_request(adapter, OID_GEN_MEDIA_CONNECT_STATUS, |
| 2099 | &connect_status, &len, errbuf); |
| 2100 | if (status == 0) { |
| 2101 | switch (connect_status) { |
| 2102 | |
| 2103 | case NdisMediaStateConnected: |
| 2104 | /* |
| 2105 | * It's connected. |
| 2106 | */ |
| 2107 | *flags |= PCAP_IF_CONNECTION_STATUS_CONNECTED; |
| 2108 | break; |
| 2109 | |
| 2110 | case NdisMediaStateDisconnected: |
| 2111 | /* |
| 2112 | * It's disconnected. |
| 2113 | */ |
| 2114 | *flags |= PCAP_IF_CONNECTION_STATUS_DISCONNECTED; |
| 2115 | break; |
| 2116 | } |
| 2117 | } |
| 2118 | } |
| 2119 | PacketCloseAdapter(adapter); |
| 2120 | return (0); |
| 2121 | } |
| 2122 | |
| 2123 | int |
| 2124 | pcap_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf) |
| 2125 | { |
| 2126 | int ret = 0; |
| 2127 | const char *desc; |
| 2128 | char *AdaptersName; |
| 2129 | ULONG NameLength; |
| 2130 | char *name; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2131 | |
| 2132 | /* |
| 2133 | * Find out how big a buffer we need. |
| 2134 | * |
| 2135 | * This call should always return FALSE; if the error is |
| 2136 | * ERROR_INSUFFICIENT_BUFFER, NameLength will be set to |
| 2137 | * the size of the buffer we need, otherwise there's a |
| 2138 | * problem, and NameLength should be set to 0. |
| 2139 | * |
| 2140 | * It shouldn't require NameLength to be set, but, |
| 2141 | * at least as of WinPcap 4.1.3, it checks whether |
| 2142 | * NameLength is big enough before it checks for a |
| 2143 | * NULL buffer argument, so, while it'll still do |
| 2144 | * the right thing if NameLength is uninitialized and |
| 2145 | * whatever junk happens to be there is big enough |
| 2146 | * (because the pointer argument will be null), it's |
| 2147 | * still reading an uninitialized variable. |
| 2148 | */ |
| 2149 | NameLength = 0; |
| 2150 | if (!PacketGetAdapterNames(NULL, &NameLength)) |
| 2151 | { |
| 2152 | DWORD last_error = GetLastError(); |
| 2153 | |
| 2154 | if (last_error != ERROR_INSUFFICIENT_BUFFER) |
| 2155 | { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2156 | pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE, |
| 2157 | last_error, "PacketGetAdapterNames"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2158 | return (-1); |
| 2159 | } |
| 2160 | } |
| 2161 | |
| 2162 | if (NameLength <= 0) |
| 2163 | return 0; |
| 2164 | AdaptersName = (char*) malloc(NameLength); |
| 2165 | if (AdaptersName == NULL) |
| 2166 | { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2167 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot allocate enough memory to list the adapters."); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2168 | return (-1); |
| 2169 | } |
| 2170 | |
| 2171 | if (!PacketGetAdapterNames(AdaptersName, &NameLength)) { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2172 | pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE, |
| 2173 | GetLastError(), "PacketGetAdapterNames"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2174 | free(AdaptersName); |
| 2175 | return (-1); |
| 2176 | } |
| 2177 | |
| 2178 | /* |
| 2179 | * "PacketGetAdapterNames()" returned a list of |
| 2180 | * null-terminated ASCII interface name strings, |
| 2181 | * terminated by a null string, followed by a list |
| 2182 | * of null-terminated ASCII interface description |
| 2183 | * strings, terminated by a null string. |
| 2184 | * This means there are two ASCII nulls at the end |
| 2185 | * of the first list. |
| 2186 | * |
| 2187 | * Find the end of the first list; that's the |
| 2188 | * beginning of the second list. |
| 2189 | */ |
| 2190 | desc = &AdaptersName[0]; |
| 2191 | while (*desc != '\0' || *(desc + 1) != '\0') |
| 2192 | desc++; |
| 2193 | |
| 2194 | /* |
| 2195 | * Found it - "desc" points to the first of the two |
| 2196 | * nulls at the end of the list of names, so the |
| 2197 | * first byte of the list of descriptions is two bytes |
| 2198 | * after it. |
| 2199 | */ |
| 2200 | desc += 2; |
| 2201 | |
| 2202 | /* |
| 2203 | * Loop over the elements in the first list. |
| 2204 | */ |
| 2205 | name = &AdaptersName[0]; |
| 2206 | while (*name != '\0') { |
| 2207 | bpf_u_int32 flags = 0; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2208 | |
| 2209 | #ifdef HAVE_AIRPCAP_API |
| 2210 | /* |
| 2211 | * Is this an AirPcap device? |
| 2212 | * If so, ignore it; it'll get added later, by the |
| 2213 | * AirPcap code. |
| 2214 | */ |
| 2215 | if (device_is_airpcap(name, errbuf) == 1) { |
| 2216 | name += strlen(name) + 1; |
| 2217 | desc += strlen(desc) + 1; |
| 2218 | continue; |
| 2219 | } |
| 2220 | #endif |
| 2221 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2222 | #ifdef HAVE_PACKET_IS_LOOPBACK_ADAPTER |
| 2223 | /* |
| 2224 | * Is this a loopback interface? |
| 2225 | */ |
| 2226 | if (PacketIsLoopbackAdapter(name)) { |
| 2227 | /* Yes */ |
| 2228 | flags |= PCAP_IF_LOOPBACK; |
| 2229 | } |
| 2230 | #endif |
| 2231 | /* |
| 2232 | * Get additional flags. |
| 2233 | */ |
| 2234 | if (get_if_flags(name, &flags, errbuf) == -1) { |
| 2235 | /* |
| 2236 | * Failure. |
| 2237 | */ |
| 2238 | ret = -1; |
| 2239 | break; |
| 2240 | } |
| 2241 | |
| 2242 | /* |
| 2243 | * Add an entry for this interface. |
| 2244 | */ |
| 2245 | if (pcap_add_if_npf(devlistp, name, flags, desc, |
| 2246 | errbuf) == -1) { |
| 2247 | /* |
| 2248 | * Failure. |
| 2249 | */ |
| 2250 | ret = -1; |
| 2251 | break; |
| 2252 | } |
| 2253 | name += strlen(name) + 1; |
| 2254 | desc += strlen(desc) + 1; |
| 2255 | } |
| 2256 | |
| 2257 | free(AdaptersName); |
| 2258 | return (ret); |
| 2259 | } |
| 2260 | |
| 2261 | /* |
| 2262 | * Return the name of a network interface attached to the system, or NULL |
| 2263 | * if none can be found. The interface must be configured up; the |
| 2264 | * lowest unit number is preferred; loopback is ignored. |
| 2265 | * |
| 2266 | * In the best of all possible worlds, this would be the same as on |
| 2267 | * UN*X, but there may be software that expects this to return a |
| 2268 | * full list of devices after the first device. |
| 2269 | */ |
| 2270 | #define ADAPTERSNAME_LEN 8192 |
| 2271 | char * |
| 2272 | pcap_lookupdev(char *errbuf) |
| 2273 | { |
| 2274 | DWORD dwVersion; |
| 2275 | DWORD dwWindowsMajorVersion; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2276 | |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2277 | /* |
| 2278 | * We disable this in "new API" mode, because 1) in WinPcap/Npcap, |
| 2279 | * it may return UTF-16 strings, for backwards-compatibility |
| 2280 | * reasons, and we're also disabling the hack to make that work, |
| 2281 | * for not-going-past-the-end-of-a-string reasons, and 2) we |
| 2282 | * want its behavior to be consistent. |
| 2283 | * |
| 2284 | * In addition, it's not thread-safe, so we've marked it as |
| 2285 | * deprecated. |
| 2286 | */ |
| 2287 | if (pcap_new_api) { |
| 2288 | snprintf(errbuf, PCAP_ERRBUF_SIZE, |
| 2289 | "pcap_lookupdev() is deprecated and is not supported in programs calling pcap_init()"); |
| 2290 | return (NULL); |
| 2291 | } |
| 2292 | |
| 2293 | /* disable MSVC's GetVersion() deprecated warning here */ |
| 2294 | DIAG_OFF_DEPRECATION |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2295 | dwVersion = GetVersion(); /* get the OS version */ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2296 | DIAG_ON_DEPRECATION |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2297 | dwWindowsMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion))); |
| 2298 | |
| 2299 | if (dwVersion >= 0x80000000 && dwWindowsMajorVersion >= 4) { |
| 2300 | /* |
| 2301 | * Windows 95, 98, ME. |
| 2302 | */ |
| 2303 | ULONG NameLength = ADAPTERSNAME_LEN; |
| 2304 | static char AdaptersName[ADAPTERSNAME_LEN]; |
| 2305 | |
| 2306 | if (PacketGetAdapterNames(AdaptersName,&NameLength) ) |
| 2307 | return (AdaptersName); |
| 2308 | else |
| 2309 | return NULL; |
| 2310 | } else { |
| 2311 | /* |
| 2312 | * Windows NT (NT 4.0 and later). |
| 2313 | * Convert the names to Unicode for backward compatibility. |
| 2314 | */ |
| 2315 | ULONG NameLength = ADAPTERSNAME_LEN; |
| 2316 | static WCHAR AdaptersName[ADAPTERSNAME_LEN]; |
| 2317 | size_t BufferSpaceLeft; |
| 2318 | char *tAstr; |
| 2319 | WCHAR *Unameptr; |
| 2320 | char *Adescptr; |
| 2321 | size_t namelen, i; |
| 2322 | WCHAR *TAdaptersName = (WCHAR*)malloc(ADAPTERSNAME_LEN * sizeof(WCHAR)); |
| 2323 | int NAdapts = 0; |
| 2324 | |
| 2325 | if(TAdaptersName == NULL) |
| 2326 | { |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2327 | (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "memory allocation failure"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2328 | return NULL; |
| 2329 | } |
| 2330 | |
| 2331 | if ( !PacketGetAdapterNames((PTSTR)TAdaptersName,&NameLength) ) |
| 2332 | { |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2333 | pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE, |
| 2334 | GetLastError(), "PacketGetAdapterNames"); |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2335 | free(TAdaptersName); |
| 2336 | return NULL; |
| 2337 | } |
| 2338 | |
| 2339 | |
| 2340 | BufferSpaceLeft = ADAPTERSNAME_LEN * sizeof(WCHAR); |
| 2341 | tAstr = (char*)TAdaptersName; |
| 2342 | Unameptr = AdaptersName; |
| 2343 | |
| 2344 | /* |
| 2345 | * Convert the device names to Unicode into AdapterName. |
| 2346 | */ |
| 2347 | do { |
| 2348 | /* |
| 2349 | * Length of the name, including the terminating |
| 2350 | * NUL. |
| 2351 | */ |
| 2352 | namelen = strlen(tAstr) + 1; |
| 2353 | |
| 2354 | /* |
| 2355 | * Do we have room for the name in the Unicode |
| 2356 | * buffer? |
| 2357 | */ |
| 2358 | if (BufferSpaceLeft < namelen * sizeof(WCHAR)) { |
| 2359 | /* |
| 2360 | * No. |
| 2361 | */ |
| 2362 | goto quit; |
| 2363 | } |
| 2364 | BufferSpaceLeft -= namelen * sizeof(WCHAR); |
| 2365 | |
| 2366 | /* |
| 2367 | * Copy the name, converting ASCII to Unicode. |
| 2368 | * namelen includes the NUL, so we copy it as |
| 2369 | * well. |
| 2370 | */ |
| 2371 | for (i = 0; i < namelen; i++) |
| 2372 | *Unameptr++ = *tAstr++; |
| 2373 | |
| 2374 | /* |
| 2375 | * Count this adapter. |
| 2376 | */ |
| 2377 | NAdapts++; |
| 2378 | } while (namelen != 1); |
| 2379 | |
| 2380 | /* |
| 2381 | * Copy the descriptions, but don't convert them from |
| 2382 | * ASCII to Unicode. |
| 2383 | */ |
| 2384 | Adescptr = (char *)Unameptr; |
| 2385 | while(NAdapts--) |
| 2386 | { |
| 2387 | size_t desclen; |
| 2388 | |
| 2389 | desclen = strlen(tAstr) + 1; |
| 2390 | |
| 2391 | /* |
| 2392 | * Do we have room for the name in the Unicode |
| 2393 | * buffer? |
| 2394 | */ |
| 2395 | if (BufferSpaceLeft < desclen) { |
| 2396 | /* |
| 2397 | * No. |
| 2398 | */ |
| 2399 | goto quit; |
| 2400 | } |
| 2401 | |
| 2402 | /* |
| 2403 | * Just copy the ASCII string. |
| 2404 | * namelen includes the NUL, so we copy it as |
| 2405 | * well. |
| 2406 | */ |
| 2407 | memcpy(Adescptr, tAstr, desclen); |
| 2408 | Adescptr += desclen; |
| 2409 | tAstr += desclen; |
| 2410 | BufferSpaceLeft -= desclen; |
| 2411 | } |
| 2412 | |
| 2413 | quit: |
| 2414 | free(TAdaptersName); |
| 2415 | return (char *)(AdaptersName); |
| 2416 | } |
| 2417 | } |
| 2418 | |
| 2419 | /* |
| 2420 | * We can't use the same code that we use on UN*X, as that's doing |
| 2421 | * UN*X-specific calls. |
| 2422 | * |
| 2423 | * We don't just fetch the entire list of devices, search for the |
| 2424 | * particular device, and use its first IPv4 address, as that's too |
| 2425 | * much work to get just one device's netmask. |
| 2426 | */ |
| 2427 | int |
| 2428 | pcap_lookupnet(const char *device, bpf_u_int32 *netp, bpf_u_int32 *maskp, |
| 2429 | char *errbuf) |
| 2430 | { |
| 2431 | /* |
| 2432 | * We need only the first IPv4 address, so we must scan the array returned by PacketGetNetInfo() |
| 2433 | * in order to skip non IPv4 (i.e. IPv6 addresses) |
| 2434 | */ |
| 2435 | npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES]; |
| 2436 | LONG if_addr_size = MAX_NETWORK_ADDRESSES; |
| 2437 | struct sockaddr_in *t_addr; |
| 2438 | LONG i; |
| 2439 | |
| 2440 | if (!PacketGetNetInfoEx((void *)device, if_addrs, &if_addr_size)) { |
| 2441 | *netp = *maskp = 0; |
| 2442 | return (0); |
| 2443 | } |
| 2444 | |
| 2445 | for(i = 0; i < if_addr_size; i++) |
| 2446 | { |
| 2447 | if(if_addrs[i].IPAddress.ss_family == AF_INET) |
| 2448 | { |
| 2449 | t_addr = (struct sockaddr_in *) &(if_addrs[i].IPAddress); |
| 2450 | *netp = t_addr->sin_addr.S_un.S_addr; |
| 2451 | t_addr = (struct sockaddr_in *) &(if_addrs[i].SubnetMask); |
| 2452 | *maskp = t_addr->sin_addr.S_un.S_addr; |
| 2453 | |
| 2454 | *netp &= *maskp; |
| 2455 | return (0); |
| 2456 | } |
| 2457 | |
| 2458 | } |
| 2459 | |
| 2460 | *netp = *maskp = 0; |
| 2461 | return (0); |
| 2462 | } |
| 2463 | |
| 2464 | static const char *pcap_lib_version_string; |
| 2465 | |
| 2466 | #ifdef HAVE_VERSION_H |
| 2467 | /* |
| 2468 | * libpcap being built for Windows, as part of a WinPcap/Npcap source |
| 2469 | * tree. Include version.h from that source tree to get the WinPcap/Npcap |
| 2470 | * version. |
| 2471 | * |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2472 | * XXX - it'd be nice if we could somehow generate the WinPcap/Npcap version |
| 2473 | * number when building as part of WinPcap/Npcap. (It'd be nice to do so |
| 2474 | * for the packet.dll version number as well.) |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2475 | */ |
| 2476 | #include "../../version.h" |
| 2477 | |
| 2478 | static const char pcap_version_string[] = |
| 2479 | WINPCAP_PRODUCT_NAME " version " WINPCAP_VER_STRING ", based on " PCAP_VERSION_STRING; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2480 | |
| 2481 | const char * |
| 2482 | pcap_lib_version(void) |
| 2483 | { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2484 | if (pcap_lib_version_string == NULL) { |
| 2485 | /* |
| 2486 | * Generate the version string. |
| 2487 | */ |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 2488 | const char *packet_version_string = PacketGetVersion(); |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2489 | |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2490 | if (strcmp(WINPCAP_VER_STRING, packet_version_string) == 0) { |
| 2491 | /* |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2492 | * WinPcap/Npcap version string and packet.dll version |
| 2493 | * string are the same; just report the WinPcap/Npcap |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2494 | * version. |
| 2495 | */ |
| 2496 | pcap_lib_version_string = pcap_version_string; |
| 2497 | } else { |
| 2498 | /* |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2499 | * WinPcap/Npcap version string and packet.dll version |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2500 | * string are different; that shouldn't be the |
| 2501 | * case (the two libraries should come from the |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2502 | * same version of WinPcap/Npcap), so we report both |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2503 | * versions. |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2504 | */ |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2505 | char *full_pcap_version_string; |
| 2506 | |
| 2507 | if (pcap_asprintf(&full_pcap_version_string, |
| 2508 | WINPCAP_PRODUCT_NAME " version " WINPCAP_VER_STRING " (packet.dll version %s), based on " PCAP_VERSION_STRING, |
| 2509 | packet_version_string) != -1) { |
| 2510 | /* Success */ |
| 2511 | pcap_lib_version_string = full_pcap_version_string; |
| 2512 | } |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2513 | } |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2514 | } |
| 2515 | return (pcap_lib_version_string); |
| 2516 | } |
| 2517 | |
| 2518 | #else /* HAVE_VERSION_H */ |
| 2519 | |
| 2520 | /* |
| 2521 | * libpcap being built for Windows, not as part of a WinPcap/Npcap source |
| 2522 | * tree. |
| 2523 | */ |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2524 | const char * |
| 2525 | pcap_lib_version(void) |
| 2526 | { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2527 | if (pcap_lib_version_string == NULL) { |
| 2528 | /* |
| 2529 | * Generate the version string. Report the packet.dll |
| 2530 | * version. |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2531 | */ |
Haibo Huang | 4ccd683 | 2020-04-23 18:03:48 -0700 | [diff] [blame] | 2532 | char *full_pcap_version_string; |
| 2533 | |
| 2534 | if (pcap_asprintf(&full_pcap_version_string, |
| 2535 | PCAP_VERSION_STRING " (packet.dll version %s)", |
| 2536 | PacketGetVersion()) != -1) { |
| 2537 | /* Success */ |
| 2538 | pcap_lib_version_string = full_pcap_version_string; |
| 2539 | } |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 2540 | } |
| 2541 | return (pcap_lib_version_string); |
| 2542 | } |
| 2543 | #endif /* HAVE_VERSION_H */ |