JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1 | /* |
| 2 | * pcap-sita.c: Packet capture interface additions for SITA ACN devices |
| 3 | * |
| 4 | * Copyright (c) 2007 Fulko Hew, SITA INC Canada, Inc <fulko.hew@sita.aero> |
| 5 | * |
| 6 | * License: BSD |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in |
| 16 | * the documentation and/or other materials provided with the |
| 17 | * distribution. |
| 18 | * 3. The names of the authors may not be used to endorse or promote |
| 19 | * products derived from this software without specific prior |
| 20 | * written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 23 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 24 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 25 | */ |
| 26 | |
| 27 | /* $Id: pcap-sita.c */ |
| 28 | |
| 29 | #ifdef HAVE_CONFIG_H |
| 30 | #include "config.h" |
| 31 | #endif |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <string.h> |
| 35 | #include <stdlib.h> |
| 36 | #include <unistd.h> |
| 37 | #include <fcntl.h> |
| 38 | #include <errno.h> |
| 39 | #include <sys/time.h> |
| 40 | #include <sys/socket.h> |
| 41 | #include <netinet/in.h> |
| 42 | #include <arpa/inet.h> |
| 43 | #include "pcap-int.h" |
| 44 | |
| 45 | #include "pcap-sita.h" |
| 46 | |
| 47 | /* non-configureable manifests follow */ |
| 48 | |
| 49 | #define IOP_SNIFFER_PORT 49152 /* TCP port on the IOP used for 'distributed pcap' usage */ |
| 50 | #define MAX_LINE_SIZE 255 /* max size of a buffer/line in /etc/hosts we allow */ |
| 51 | #define MAX_CHASSIS 8 /* number of chassis in an ACN site */ |
| 52 | #define MAX_GEOSLOT 8 /* max number of access units in an ACN site */ |
| 53 | |
| 54 | #define FIND 0 |
| 55 | #define LIVE 1 |
| 56 | |
| 57 | typedef struct iface { |
| 58 | struct iface *next; /* a pointer to the next interface */ |
| 59 | char *name; /* this interface's name */ |
| 60 | char *IOPname; /* this interface's name on an IOP */ |
| 61 | uint32_t iftype; /* the type of interface (DLT values) */ |
| 62 | } iface_t; |
| 63 | |
| 64 | typedef struct unit { |
| 65 | char *ip; /* this unit's IP address (as extracted from /etc/hosts) */ |
| 66 | int fd; /* the connection to this unit (if it exists) */ |
| 67 | int find_fd; /* a big kludge to avoid my programming limitations since I could have this unit open for findalldevs purposes */ |
| 68 | int first_time; /* 0 = just opened via acn_open_live(), ie. the first time, NZ = nth time */ |
| 69 | struct sockaddr_in *serv_addr; /* the address control block for comms to this unit */ |
| 70 | int chassis; |
| 71 | int geoslot; |
| 72 | iface_t *iface; /* a pointer to a linked list of interface structures */ |
| 73 | char *imsg; /* a pointer to an inbound message */ |
| 74 | int len; /* the current size of the inbound message */ |
| 75 | } unit_t; |
| 76 | |
| 77 | static unit_t units[MAX_CHASSIS+1][MAX_GEOSLOT+1]; /* we use indexes of 1 through 8, but we reserve/waste index 0 */ |
| 78 | static fd_set readfds; /* a place to store the file descriptors for the connections to the IOPs */ |
| 79 | static int max_fs; |
| 80 | |
| 81 | pcap_if_t *acn_if_list; /* pcap's list of available interfaces */ |
| 82 | |
| 83 | static void dump_interface_list(void) { |
| 84 | pcap_if_t *iff; |
| 85 | pcap_addr_t *addr; |
| 86 | int longest_name_len = 0; |
| 87 | char *n, *d, *f; |
| 88 | int if_number = 0; |
| 89 | |
| 90 | iff = acn_if_list; |
| 91 | while (iff) { |
| 92 | if (iff->name && (strlen(iff->name) > longest_name_len)) longest_name_len = strlen(iff->name); |
| 93 | iff = iff->next; |
| 94 | } |
| 95 | iff = acn_if_list; |
| 96 | printf("Interface List:\n"); |
| 97 | while (iff) { |
| 98 | n = (iff->name) ? iff->name : ""; |
| 99 | d = (iff->description) ? iff->description : ""; |
| 100 | f = (iff->flags == PCAP_IF_LOOPBACK) ? "L" : ""; |
| 101 | printf("%3d: %*s %s '%s'\n", if_number++, longest_name_len, n, f, d); |
| 102 | addr = iff->addresses; |
| 103 | while (addr) { |
| 104 | printf("%*s ", (5 + longest_name_len), ""); /* add some indentation */ |
| 105 | printf("%15s ", (addr->addr) ? inet_ntoa(((struct sockaddr_in *)addr->addr)->sin_addr) : ""); |
| 106 | printf("%15s ", (addr->netmask) ? inet_ntoa(((struct sockaddr_in *)addr->netmask)->sin_addr) : ""); |
| 107 | printf("%15s ", (addr->broadaddr) ? inet_ntoa(((struct sockaddr_in *)addr->broadaddr)->sin_addr) : ""); |
| 108 | printf("%15s ", (addr->dstaddr) ? inet_ntoa(((struct sockaddr_in *)addr->dstaddr)->sin_addr) : ""); |
| 109 | printf("\n"); |
| 110 | addr = addr->next; |
| 111 | } |
| 112 | iff = iff->next; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | static void dump(unsigned char *ptr, int i, int indent) { |
| 117 | fprintf(stderr, "%*s", indent, " "); |
| 118 | for (; i > 0; i--) { |
| 119 | fprintf(stderr, "%2.2x ", *ptr++); |
| 120 | } |
| 121 | fprintf(stderr, "\n"); |
| 122 | } |
| 123 | |
| 124 | static void dump_interface_list_p(void) { |
| 125 | pcap_if_t *iff; |
| 126 | pcap_addr_t *addr; |
| 127 | int if_number = 0; |
| 128 | |
| 129 | iff = acn_if_list; |
| 130 | printf("Interface Pointer @ %p is %p:\n", &acn_if_list, iff); |
| 131 | while (iff) { |
| 132 | printf("%3d: %p %p next: %p\n", if_number++, iff->name, iff->description, iff->next); |
| 133 | dump((unsigned char *)iff, sizeof(pcap_if_t), 5); |
| 134 | addr = iff->addresses; |
| 135 | while (addr) { |
| 136 | printf(" %p %p %p %p, next: %p\n", addr->addr, addr->netmask, addr->broadaddr, addr->dstaddr, addr->next); |
| 137 | dump((unsigned char *)addr, sizeof(pcap_addr_t), 10); |
| 138 | addr = addr->next; |
| 139 | } |
| 140 | iff = iff->next; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | static void dump_unit_table(void) { |
| 145 | int chassis, geoslot; |
| 146 | iface_t *p; |
| 147 | |
| 148 | printf("%c:%c %s %s\n", 'C', 'S', "fd", "IP Address"); |
| 149 | for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) { |
| 150 | for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) { |
| 151 | if (units[chassis][geoslot].ip != NULL) |
| 152 | printf("%d:%d %2d %s\n", chassis, geoslot, units[chassis][geoslot].fd, units[chassis][geoslot].ip); |
| 153 | p = units[chassis][geoslot].iface; |
| 154 | while (p) { |
| 155 | char *n = (p->name) ? p->name : ""; |
| 156 | char *i = (p->IOPname) ? p->IOPname : ""; |
| 157 | p = p->next; |
| 158 | printf(" %12s -> %12s\n", i, n); |
| 159 | } |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | static int find_unit_by_fd(int fd, int *chassis, int *geoslot, unit_t **unit_ptr) { |
| 165 | int c, s; |
| 166 | |
| 167 | for (c = 0; c <= MAX_CHASSIS; c++) { |
| 168 | for (s = 0; s <= MAX_GEOSLOT; s++) { |
| 169 | if (units[c][s].fd == fd || units[c][s].find_fd == fd) { |
| 170 | if (chassis) *chassis = c; |
| 171 | if (geoslot) *geoslot = s; |
| 172 | if (unit_ptr) *unit_ptr = &units[c][s]; |
| 173 | return 1; |
| 174 | } |
| 175 | } |
| 176 | } |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | static int read_client_nbytes(int fd, int count, unsigned char *buf) { |
| 181 | unit_t *u; |
| 182 | int chassis, geoslot; |
| 183 | int len; |
| 184 | |
| 185 | find_unit_by_fd(fd, &chassis, &geoslot, &u); |
| 186 | while (count) { |
| 187 | if ((len = recv(fd, buf, count, 0)) <= 0) return -1; /* read in whatever data was sent to us */ |
| 188 | count -= len; |
| 189 | buf += len; |
| 190 | } /* till we have everything we are looking for */ |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | static void empty_unit_iface(unit_t *u) { |
| 195 | iface_t *p, *cur; |
| 196 | |
| 197 | cur = u->iface; |
| 198 | while (cur) { /* loop over all the interface entries */ |
| 199 | if (cur->name) free(cur->name); /* throwing away the contents if they exist */ |
| 200 | if (cur->IOPname) free(cur->IOPname); |
| 201 | p = cur->next; |
| 202 | free(cur); /* then throw away the structure itself */ |
| 203 | cur = p; |
| 204 | } |
| 205 | u->iface = 0; /* and finally remember that there are no remaining structure */ |
| 206 | } |
| 207 | |
| 208 | static void empty_unit(int chassis, int geoslot) { |
| 209 | unit_t *u = &units[chassis][geoslot]; |
| 210 | |
| 211 | empty_unit_iface(u); |
| 212 | if (u->imsg) { /* then if an inbound message buffer exists */ |
| 213 | u->imsg = (char *)realloc(u->imsg, 1); /* and re-allocate the old large buffer into a new small one */ |
| 214 | if (u->imsg == NULL) { /* oops, realloc call failed */ |
| 215 | fprintf(stderr, "Warning...call to realloc() failed, value of errno is %d\n", errno); |
| 216 | |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | static void empty_unit_table(void) { |
| 221 | int chassis, geoslot; |
| 222 | |
| 223 | for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) { |
| 224 | for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) { |
| 225 | if (units[chassis][geoslot].ip != NULL) { |
| 226 | free(units[chassis][geoslot].ip); /* get rid of the malloc'ed space that holds the IP address */ |
| 227 | units[chassis][geoslot].ip = 0; /* then set the pointer to NULL */ |
| 228 | } |
| 229 | empty_unit(chassis, geoslot); |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | static char *find_nth_interface_name(int n) { |
| 235 | int chassis, geoslot; |
| 236 | iface_t *p; |
| 237 | char *last_name = 0; |
| 238 | |
| 239 | if (n < 0) n = 0; /* ensure we are working with a valid number */ |
| 240 | for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) { /* scan the table... */ |
| 241 | for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) { |
| 242 | if (units[chassis][geoslot].ip != NULL) { |
| 243 | p = units[chassis][geoslot].iface; |
| 244 | while (p) { /* and all interfaces... */ |
| 245 | if (p->IOPname) last_name = p->name; /* remembering the last name found */ |
| 246 | if (n-- == 0) return last_name; /* and if we hit the instance requested */ |
| 247 | p = p->next; |
| 248 | } |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | /* if we couldn't fine the selected entry */ |
| 253 | if (last_name) return last_name; /* ... but we did have at least one entry... return the last entry found */ |
| 254 | return ""; /* ... but if there wasn't any entry... return an empty string instead */ |
| 255 | } |
| 256 | |
| 257 | int acn_parse_hosts_file(char *errbuf) { /* returns: -1 = error, 0 = OK */ |
| 258 | FILE *fp; |
| 259 | char buf[MAX_LINE_SIZE]; |
| 260 | char *ptr, *ptr2; |
| 261 | int pos; |
| 262 | int chassis, geoslot; |
| 263 | unit_t *u; |
| 264 | |
| 265 | empty_unit_table(); |
| 266 | if ((fp = fopen("/etc/hosts", "r")) == NULL) { /* try to open the hosts file and if it fails */ |
| 267 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot open '/etc/hosts' for reading."); /* return the nohostsfile error response */ |
| 268 | return -1; |
| 269 | } |
| 270 | while (fgets(buf, MAX_LINE_SIZE-1, fp)) { /* while looping over the file */ |
| 271 | |
| 272 | pos = strcspn(buf, "#\n\r"); /* find the first comment character or EOL */ |
| 273 | *(buf + pos) = '\0'; /* and clobber it and anything that follows it */ |
| 274 | |
| 275 | pos = strspn(buf, " \t"); /* then find the first non-white space */ |
| 276 | if (pos == strlen(buf)) /* if there is nothing but white space on the line */ |
| 277 | continue; /* ignore that empty line */ |
| 278 | ptr = buf + pos; /* and skip over any of that leading whitespace */ |
| 279 | |
| 280 | if ((ptr2 = strstr(ptr, "_I_")) == NULL) /* skip any lines that don't have names that look like they belong to IOPs */ |
| 281 | continue; |
| 282 | if (*(ptr2 + 4) != '_') /* and skip other lines that have names that don't look like ACN components */ |
| 283 | continue; |
| 284 | *(ptr + strcspn(ptr, " \t")) = '\0'; /* null terminate the IP address so its a standalone string */ |
| 285 | |
| 286 | chassis = *(ptr2 + 3) - '0'; /* extract the chassis number */ |
| 287 | geoslot = *(ptr2 + 5) - '0'; /* and geo-slot number */ |
| 288 | if (chassis < 1 || chassis > MAX_CHASSIS || |
| 289 | geoslot < 1 || geoslot > MAX_GEOSLOT) { /* if the chassis and/or slot numbers appear to be bad... */ |
| 290 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "Invalid ACN name in '/etc/hosts'."); /* warn the user */ |
| 291 | continue; /* and ignore the entry */ |
| 292 | } |
| 293 | if ((ptr2 = (char *)malloc(strlen(ptr) + 1)) == NULL) { |
| 294 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); |
| 295 | continue; |
| 296 | } |
| 297 | strcpy(ptr2, ptr); /* copy the IP address into our malloc'ed memory */ |
| 298 | u = &units[chassis][geoslot]; |
| 299 | u->ip = ptr2; /* and remember the whole shebang */ |
| 300 | u->chassis = chassis; |
| 301 | u->geoslot = geoslot; |
| 302 | } |
| 303 | fclose(fp); |
| 304 | if (*errbuf) return -1; |
| 305 | else return 0; |
| 306 | } |
| 307 | |
| 308 | static int open_with_IOP(unit_t *u, int flag) { |
| 309 | int sockfd; |
| 310 | char *ip; |
| 311 | |
| 312 | if (u->serv_addr == NULL) { |
| 313 | u->serv_addr = malloc(sizeof(struct sockaddr_in)); |
| 314 | |
| 315 | /* since we called malloc(), lets check to see if we actually got the memory */ |
| 316 | if (u->serv_addr == NULL) { /* oops, we didn't get the memory requested */ |
| 317 | fprintf(stderr, "malloc() request for u->serv_addr failed, value of errno is: %d\n", errno); |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | } |
| 322 | ip = u->ip; |
| 323 | /* bzero() is deprecated, replaced with memset() */ |
| 324 | memset((char *)u->serv_addr, 0, sizeof(struct sockaddr_in)); |
| 325 | u->serv_addr->sin_family = AF_INET; |
| 326 | u->serv_addr->sin_addr.s_addr = inet_addr(ip); |
| 327 | u->serv_addr->sin_port = htons(IOP_SNIFFER_PORT); |
| 328 | |
| 329 | if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { |
| 330 | fprintf(stderr, "pcap can't open a socket for connecting to IOP at %s\n", ip); |
| 331 | return 0; |
| 332 | } |
| 333 | if (connect(sockfd, (struct sockaddr *)u->serv_addr, sizeof(struct sockaddr_in)) < 0) { |
| 334 | fprintf(stderr, "pcap can't connect to IOP at %s\n", ip); |
| 335 | return 0; |
| 336 | } |
| 337 | if (flag == LIVE) u->fd = sockfd; |
| 338 | else u->find_fd = sockfd; |
| 339 | u->first_time = 0; |
| 340 | return sockfd; /* return the non-zero file descriptor as a 'success' indicator */ |
| 341 | } |
| 342 | |
| 343 | static void close_with_IOP(int chassis, int geoslot, int flag) { |
| 344 | int *id; |
| 345 | |
| 346 | if (flag == LIVE) id = &units[chassis][geoslot].fd; |
| 347 | else id = &units[chassis][geoslot].find_fd; |
| 348 | |
| 349 | if (*id) { /* this was the last time, so... if we are connected... */ |
| 350 | close(*id); /* disconnect us */ |
| 351 | *id = 0; /* and forget that the descriptor exists because we are not open */ |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | static void pcap_cleanup_acn(pcap_t *handle) { |
| 356 | int chassis, geoslot; |
| 357 | unit_t *u; |
| 358 | |
| 359 | if (find_unit_by_fd(handle->fd, &chassis, &geoslot, &u) == 0) |
| 360 | return; |
| 361 | close_with_IOP(chassis, geoslot, LIVE); |
| 362 | if (u) |
| 363 | u->first_time = 0; |
| 364 | pcap_cleanup_live_common(handle); |
| 365 | } |
| 366 | |
| 367 | static void send_to_fd(int fd, int len, unsigned char *str) { |
| 368 | int nwritten; |
| 369 | int chassis, geoslot; |
| 370 | |
| 371 | while (len > 0) { |
| 372 | if ((nwritten = write(fd, str, len)) <= 0) { |
| 373 | find_unit_by_fd(fd, &chassis, &geoslot, NULL); |
| 374 | if (units[chassis][geoslot].fd == fd) close_with_IOP(chassis, geoslot, LIVE); |
| 375 | else if (units[chassis][geoslot].find_fd == fd) close_with_IOP(chassis, geoslot, FIND); |
| 376 | empty_unit(chassis, geoslot); |
| 377 | return; |
| 378 | } |
| 379 | len -= nwritten; |
| 380 | str += nwritten; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | static void acn_freealldevs(void) { |
| 385 | |
| 386 | pcap_if_t *iff, *next_iff; |
| 387 | pcap_addr_t *addr, *next_addr; |
| 388 | |
| 389 | for (iff = acn_if_list; iff != NULL; iff = next_iff) { |
| 390 | next_iff = iff->next; |
| 391 | for (addr = iff->addresses; addr != NULL; addr = next_addr) { |
| 392 | next_addr = addr->next; |
| 393 | if (addr->addr) free(addr->addr); |
| 394 | if (addr->netmask) free(addr->netmask); |
| 395 | if (addr->broadaddr) free(addr->broadaddr); |
| 396 | if (addr->dstaddr) free(addr->dstaddr); |
| 397 | free(addr); |
| 398 | } |
| 399 | if (iff->name) free(iff->name); |
| 400 | if (iff->description) free(iff->description); |
| 401 | free(iff); |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | static void nonUnified_IOP_port_name(char *buf, size_t bufsize, const char *proto, unit_t *u) { |
| 406 | |
| 407 | snprintf(buf, bufsize, "%s_%d_%d", proto, u->chassis, u->geoslot); |
| 408 | } |
| 409 | |
| 410 | static void unified_IOP_port_name(char *buf, size_t bufsize, const char *proto, unit_t *u, int IOPportnum) { |
| 411 | int portnum; |
| 412 | |
| 413 | portnum = ((u->chassis - 1) * 64) + ((u->geoslot - 1) * 8) + IOPportnum + 1; |
| 414 | snprintf(buf, bufsize, "%s_%d", proto, portnum); |
| 415 | } |
| 416 | |
| 417 | static char *translate_IOP_to_pcap_name(unit_t *u, char *IOPname, bpf_u_int32 iftype) { |
| 418 | iface_t *iface_ptr, *iface; |
| 419 | char *name; |
| 420 | char buf[32]; |
| 421 | char *proto; |
| 422 | char *port; |
| 423 | int IOPportnum = 0; |
| 424 | |
| 425 | iface = malloc(sizeof(iface_t)); /* get memory for a structure */ |
| 426 | if (iface == NULL) { /* oops, we didn't get the memory requested */ |
| 427 | fprintf(stderr, "Error...couldn't allocate memory for interface structure...value of errno is: %d\n", errno); |
| 428 | return NULL; |
| 429 | } |
| 430 | memset((char *)iface, 0, sizeof(iface_t)); /* bzero is deprecated(), replaced with memset() */ |
| 431 | |
| 432 | iface->iftype = iftype; /* remember the interface type of this interface */ |
| 433 | |
| 434 | name = malloc(strlen(IOPname) + 1); /* get memory for the IOP's name */ |
| 435 | if (name == NULL) { /* oops, we didn't get the memory requested */ |
| 436 | fprintf(stderr, "Error...couldn't allocate memory for IOPname...value of errno is: %d\n", errno); |
| 437 | return NULL; |
| 438 | } |
| 439 | |
| 440 | strcpy(name, IOPname); /* and copy it in */ |
| 441 | iface->IOPname = name; /* and stick it into the structure */ |
| 442 | |
| 443 | if (strncmp(IOPname, "lo", 2) == 0) { |
| 444 | IOPportnum = atoi(&IOPname[2]); |
| 445 | switch (iftype) { |
| 446 | case DLT_EN10MB: |
| 447 | nonUnified_IOP_port_name(buf, sizeof buf, "lo", u); |
| 448 | break; |
| 449 | default: |
| 450 | unified_IOP_port_name(buf, sizeof buf, "???", u, IOPportnum); |
| 451 | break; |
| 452 | } |
| 453 | } else if (strncmp(IOPname, "eth", 3) == 0) { |
| 454 | IOPportnum = atoi(&IOPname[3]); |
| 455 | switch (iftype) { |
| 456 | case DLT_EN10MB: |
| 457 | nonUnified_IOP_port_name(buf, sizeof buf, "eth", u); |
| 458 | break; |
| 459 | default: |
| 460 | unified_IOP_port_name(buf, sizeof buf, "???", u, IOPportnum); |
| 461 | break; |
| 462 | } |
| 463 | } else if (strncmp(IOPname, "wan", 3) == 0) { |
| 464 | IOPportnum = atoi(&IOPname[3]); |
| 465 | switch (iftype) { |
| 466 | case DLT_SITA: |
| 467 | unified_IOP_port_name(buf, sizeof buf, "wan", u, IOPportnum); |
| 468 | break; |
| 469 | default: |
| 470 | unified_IOP_port_name(buf, sizeof buf, "???", u, IOPportnum); |
| 471 | break; |
| 472 | } |
| 473 | } else { |
| 474 | fprintf(stderr, "Error... invalid IOP name %s\n", IOPname); |
| 475 | return NULL; |
| 476 | } |
| 477 | |
| 478 | name = malloc(strlen(buf) + 1); /* get memory for that name */ |
| 479 | if (name == NULL) { /* oops, we didn't get the memory requested */ |
| 480 | fprintf(stderr, "Error...couldn't allocate memory for IOP port name...value of errno is: %d\n", errno); |
| 481 | return NULL; |
| 482 | } |
| 483 | |
| 484 | strcpy(name, buf); /* and copy it in */ |
| 485 | iface->name = name; /* and stick it into the structure */ |
| 486 | |
| 487 | if (u->iface == 0) { /* if this is the first name */ |
| 488 | u->iface = iface; /* stick this entry at the head of the list */ |
| 489 | } else { |
| 490 | iface_ptr = u->iface; |
| 491 | while (iface_ptr->next) { /* othewise scan the list */ |
| 492 | iface_ptr = iface_ptr->next; /* till we're at the last entry */ |
| 493 | } |
| 494 | iface_ptr->next = iface; /* then tack this entry on the end of the list */ |
| 495 | } |
| 496 | return iface->name; |
| 497 | } |
| 498 | |
| 499 | static int if_sort(char *s1, char *s2) { |
| 500 | char *s1_p2, *s2_p2; |
| 501 | char str1[MAX_LINE_SIZE], str2[MAX_LINE_SIZE]; |
| 502 | int s1_p1_len, s2_p1_len; |
| 503 | int retval; |
| 504 | |
| 505 | if ((s1_p2 = strchr(s1, '_'))) { /* if an underscore is found... */ |
| 506 | s1_p1_len = s1_p2 - s1; /* the prefix length is the difference in pointers */ |
| 507 | s1_p2++; /* the suffix actually starts _after_ the underscore */ |
| 508 | } else { /* otherwise... */ |
| 509 | s1_p1_len = strlen(s1); /* the prefix length is the length of the string itself */ |
| 510 | s1_p2 = 0; /* and there is no suffix */ |
| 511 | } |
| 512 | if ((s2_p2 = strchr(s2, '_'))) { /* now do the same for the second string */ |
| 513 | s2_p1_len = s2_p2 - s2; |
| 514 | s2_p2++; |
| 515 | } else { |
| 516 | s2_p1_len = strlen(s2); |
| 517 | s2_p2 = 0; |
| 518 | } |
| 519 | strncpy(str1, s1, (s1_p1_len > sizeof(str1)) ? s1_p1_len : sizeof(str1)); *(str1 + s1_p1_len) = 0; |
| 520 | strncpy(str2, s2, (s2_p1_len > sizeof(str2)) ? s2_p1_len : sizeof(str2)); *(str2 + s2_p1_len) = 0; |
| 521 | retval = strcmp(str1, str2); |
| 522 | if (retval != 0) return retval; /* if they are not identical, then we can quit now and return the indication */ |
| 523 | return strcmp(s1_p2, s2_p2); /* otherwise we return the result of comparing the 2nd half of the string */ |
| 524 | } |
| 525 | |
| 526 | static void sort_if_table(void) { |
| 527 | pcap_if_t *p1, *p2, *prev, *temp; |
| 528 | int has_swapped; |
| 529 | |
| 530 | if (!acn_if_list) return; /* nothing to do if the list is empty */ |
| 531 | |
| 532 | while (1) { |
| 533 | p1 = acn_if_list; /* start at the head of the list */ |
| 534 | prev = 0; |
| 535 | has_swapped = 0; |
| 536 | while ((p2 = p1->next)) { |
| 537 | if (if_sort(p1->name, p2->name) > 0) { |
| 538 | if (prev) { /* we are swapping things that are _not_ at the head of the list */ |
| 539 | temp = p2->next; |
| 540 | prev->next = p2; |
| 541 | p2->next = p1; |
| 542 | p1->next = temp; |
| 543 | } else { /* special treatment if we are swapping with the head of the list */ |
| 544 | temp = p2->next; |
| 545 | acn_if_list= p2; |
| 546 | p2->next = p1; |
| 547 | p1->next = temp; |
| 548 | } |
| 549 | p1 = p2; |
| 550 | prev = p1; |
| 551 | has_swapped = 1; |
| 552 | } |
| 553 | prev = p1; |
| 554 | p1 = p1->next; |
| 555 | } |
| 556 | if (has_swapped == 0) |
| 557 | return; |
| 558 | } |
| 559 | return; |
| 560 | } |
| 561 | |
| 562 | static int process_client_data (char *errbuf) { /* returns: -1 = error, 0 = OK */ |
| 563 | int chassis, geoslot; |
| 564 | unit_t *u; |
| 565 | pcap_if_t *iff, *prev_iff; |
| 566 | pcap_addr_t *addr, *prev_addr; |
| 567 | char *ptr; |
| 568 | int address_count; |
| 569 | struct sockaddr_in *s; |
| 570 | char *newname; |
| 571 | bpf_u_int32 interfaceType; |
| 572 | unsigned char flags; |
| 573 | |
| 574 | prev_iff = 0; |
| 575 | for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) { |
| 576 | for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) { /* now loop over all the devices */ |
| 577 | u = &units[chassis][geoslot]; |
| 578 | empty_unit_iface(u); |
| 579 | ptr = u->imsg; /* point to the start of the msg for this IOP */ |
| 580 | while (ptr < (u->imsg + u->len)) { |
| 581 | if ((iff = malloc(sizeof(pcap_if_t))) == NULL) { |
| 582 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); |
| 583 | return -1; |
| 584 | } |
| 585 | memset((char *)iff, 0, sizeof(pcap_if_t)); /* bzero() is deprecated, replaced with memset() */ |
| 586 | if (acn_if_list == 0) acn_if_list = iff; /* remember the head of the list */ |
| 587 | if (prev_iff) prev_iff->next = iff; /* insert a forward link */ |
| 588 | |
| 589 | if (*ptr) { /* if there is a count for the name */ |
| 590 | if ((iff->name = malloc(*ptr + 1)) == NULL) { /* get that amount of space */ |
| 591 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); |
| 592 | return -1; |
| 593 | } |
| 594 | memcpy(iff->name, (ptr + 1), *ptr); /* copy the name into the malloc'ed space */ |
| 595 | *(iff->name + *ptr) = 0; /* and null terminate the string */ |
| 596 | ptr += *ptr; /* now move the pointer forwards by the length of the count plus the length of the string */ |
| 597 | } |
| 598 | ptr++; |
| 599 | |
| 600 | if (*ptr) { /* if there is a count for the description */ |
| 601 | if ((iff->description = malloc(*ptr + 1)) == NULL) { /* get that amount of space */ |
| 602 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); |
| 603 | return -1; |
| 604 | } |
| 605 | memcpy(iff->description, (ptr + 1), *ptr); /* copy the name into the malloc'ed space */ |
| 606 | *(iff->description + *ptr) = 0; /* and null terminate the string */ |
| 607 | ptr += *ptr; /* now move the pointer forwards by the length of the count plus the length of the string */ |
| 608 | } |
| 609 | ptr++; |
| 610 | |
| 611 | interfaceType = ntohl(*(bpf_u_int32 *)ptr); |
| 612 | ptr += 4; /* skip over the interface type */ |
| 613 | |
| 614 | flags = *ptr++; |
| 615 | if (flags) iff->flags = PCAP_IF_LOOPBACK; /* if this is a loopback style interface, lets mark it as such */ |
| 616 | |
| 617 | address_count = *ptr++; |
| 618 | |
| 619 | prev_addr = 0; |
| 620 | while (address_count--) { |
| 621 | if ((addr = malloc(sizeof(pcap_addr_t))) == NULL) { |
| 622 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); |
| 623 | return -1; |
| 624 | } |
| 625 | + memset((char *)addr, 0, sizeof(pcap_addr_t)); /* bzero() is deprecated, replaced with memset() */ |
| 626 | if (iff->addresses == 0) iff->addresses = addr; |
| 627 | if (prev_addr) prev_addr->next = addr; /* insert a forward link */ |
| 628 | if (*ptr) { /* if there is a count for the address */ |
| 629 | if ((s = malloc(sizeof(struct sockaddr_in))) == NULL) { /* get that amount of space */ |
| 630 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); |
| 631 | return -1; |
| 632 | } |
| 633 | memset((char *)s, 0, sizeof(struct sockaddr_in)); /* bzero() is deprecated, replaced with memset() */ |
| 634 | addr->addr = (struct sockaddr *)s; |
| 635 | s->sin_family = AF_INET; |
| 636 | s->sin_addr.s_addr = *(bpf_u_int32 *)(ptr + 1); /* copy the address in */ |
| 637 | ptr += *ptr; /* now move the pointer forwards according to the specified length of the address */ |
| 638 | } |
| 639 | ptr++; /* then forwards one more for the 'length of the address' field */ |
| 640 | if (*ptr) { /* process any netmask */ |
| 641 | if ((s = malloc(sizeof(struct sockaddr_in))) == NULL) { |
| 642 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); |
| 643 | return -1; |
| 644 | } |
| 645 | /* bzero() is deprecated, replaced with memset() */ |
| 646 | memset((char *)s, 0, sizeof(struct sockaddr_in)); |
| 647 | |
| 648 | addr->netmask = (struct sockaddr *)s; |
| 649 | s->sin_family = AF_INET; |
| 650 | s->sin_addr.s_addr = *(bpf_u_int32*)(ptr + 1); |
| 651 | ptr += *ptr; |
| 652 | } |
| 653 | ptr++; |
| 654 | if (*ptr) { /* process any broadcast address */ |
| 655 | if ((s = malloc(sizeof(struct sockaddr_in))) == NULL) { |
| 656 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); |
| 657 | return -1; |
| 658 | } |
| 659 | /* bzero() is deprecated, replaced with memset() */ |
| 660 | memset((char *)s, 0, sizeof(struct sockaddr_in)); |
| 661 | |
| 662 | addr->broadaddr = (struct sockaddr *)s; |
| 663 | s->sin_family = AF_INET; |
| 664 | s->sin_addr.s_addr = *(bpf_u_int32*)(ptr + 1); |
| 665 | ptr += *ptr; |
| 666 | } |
| 667 | ptr++; |
| 668 | if (*ptr) { /* process any destination address */ |
| 669 | if ((s = malloc(sizeof(struct sockaddr_in))) == NULL) { |
| 670 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); |
| 671 | return -1; |
| 672 | } |
| 673 | /* bzero() is deprecated, replaced with memset() */ |
| 674 | memset((char *)s, 0, sizeof(struct sockaddr_in)); |
| 675 | |
| 676 | addr->dstaddr = (struct sockaddr *)s; |
| 677 | s->sin_family = AF_INET; |
| 678 | s->sin_addr.s_addr = *(bpf_u_int32*)(ptr + 1); |
| 679 | ptr += *ptr; |
| 680 | } |
| 681 | ptr++; |
| 682 | prev_addr = addr; |
| 683 | } |
| 684 | prev_iff = iff; |
| 685 | |
| 686 | newname = translate_IOP_to_pcap_name(u, iff->name, interfaceType); /* add a translation entry and get a point to the mangled name */ |
| 687 | if ((iff->name = realloc(iff->name, strlen(newname) + 1)) == NULL) { /* we now re-write the name stored in the interface list */ |
| 688 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "realloc: %s", pcap_strerror(errno)); |
| 689 | return -1; |
| 690 | } |
| 691 | strcpy(iff->name, newname); /* to this new name */ |
| 692 | } |
| 693 | } |
| 694 | } |
| 695 | return 0; |
| 696 | } |
| 697 | |
| 698 | static int read_client_data (int fd) { |
| 699 | unsigned char buf[256]; |
| 700 | int chassis, geoslot; |
| 701 | unit_t *u; |
| 702 | int len; |
| 703 | |
| 704 | find_unit_by_fd(fd, &chassis, &geoslot, &u); |
| 705 | |
| 706 | if ((len = recv(fd, buf, sizeof(buf), 0)) <= 0) return 0; /* read in whatever data was sent to us */ |
| 707 | |
| 708 | if ((u->imsg = realloc(u->imsg, (u->len + len))) == NULL) /* extend the buffer for the new data */ |
| 709 | return 0; |
| 710 | memcpy((u->imsg + u->len), buf, len); /* append the new data */ |
| 711 | u->len += len; |
| 712 | return 1; |
| 713 | } |
| 714 | |
| 715 | static void wait_for_all_answers(void) { |
| 716 | int retval; |
| 717 | struct timeval tv; |
| 718 | int fd; |
| 719 | int chassis, geoslot; |
| 720 | |
| 721 | tv.tv_sec = 2; |
| 722 | tv.tv_usec = 0; |
| 723 | |
| 724 | while (1) { |
| 725 | int flag = 0; |
| 726 | fd_set working_set; |
| 727 | |
| 728 | for (fd = 0; fd <= max_fs; fd++) { /* scan the list of descriptors we may be listening to */ |
| 729 | if (FD_ISSET(fd, &readfds)) flag = 1; /* and see if there are any still set */ |
| 730 | } |
| 731 | if (flag == 0) return; /* we are done, when they are all gone */ |
| 732 | |
| 733 | memcpy(&working_set, &readfds, sizeof(readfds)); /* otherwise, we still have to listen for more stuff, till we timeout */ |
| 734 | retval = select(max_fs + 1, &working_set, NULL, NULL, &tv); |
| 735 | if (retval == -1) { /* an error occured !!!!! */ |
| 736 | return; |
| 737 | } else if (retval == 0) { /* timeout occured, so process what we've got sofar and return */ |
| 738 | printf("timeout\n"); |
| 739 | return; |
| 740 | } else { |
| 741 | for (fd = 0; fd <= max_fs; fd++) { /* scan the list of things to do, and do them */ |
| 742 | if (FD_ISSET(fd, &working_set)) { |
| 743 | if (read_client_data(fd) == 0) { /* if the socket has closed */ |
| 744 | FD_CLR(fd, &readfds); /* and descriptors we listen to for errors */ |
| 745 | find_unit_by_fd(fd, &chassis, &geoslot, NULL); |
| 746 | close_with_IOP(chassis, geoslot, FIND); /* and close out connection to him */ |
| 747 | } |
| 748 | } |
| 749 | } |
| 750 | } |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | static char *get_error_response(int fd, char *errbuf) { /* return a pointer on error, NULL on no error */ |
| 755 | char byte; |
| 756 | int len = 0; |
| 757 | |
| 758 | while (1) { |
| 759 | recv(fd, &byte, 1, 0); /* read another byte in */ |
| 760 | if (errbuf && (len++ < PCAP_ERRBUF_SIZE)) { /* and if there is still room in the buffer */ |
| 761 | *errbuf++ = byte; /* stick it in */ |
| 762 | *errbuf = '\0'; /* ensure the string is null terminated just in case we might exceed the buffer's size */ |
| 763 | } |
| 764 | if (byte == '\0') { |
| 765 | if (len > 1) { return errbuf; } |
| 766 | else { return NULL; } |
| 767 | } |
| 768 | } |
| 769 | } |
| 770 | |
| 771 | int acn_findalldevs(char *errbuf) { /* returns: -1 = error, 0 = OK */ |
| 772 | int chassis, geoslot; |
| 773 | unit_t *u; |
| 774 | |
| 775 | FD_ZERO(&readfds); |
| 776 | max_fs = 0; |
| 777 | for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) { |
| 778 | for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) { |
| 779 | u = &units[chassis][geoslot]; |
| 780 | if (u->ip && (open_with_IOP(u, FIND))) { /* connect to the remote IOP */ |
| 781 | send_to_fd(u->find_fd, 1, (unsigned char *)"\0"); |
| 782 | if (get_error_response(u->find_fd, errbuf)) |
| 783 | close_with_IOP(chassis, geoslot, FIND); |
| 784 | else { |
| 785 | if (u->find_fd > max_fs) |
| 786 | max_fs = u->find_fd; /* remember the highest number currently in use */ |
| 787 | FD_SET(u->find_fd, &readfds); /* we are going to want to read this guy's response to */ |
| 788 | u->len = 0; |
| 789 | send_to_fd(u->find_fd, 1, (unsigned char *)"Q"); /* this interface query request */ |
| 790 | } |
| 791 | } |
| 792 | } |
| 793 | } |
| 794 | wait_for_all_answers(); |
| 795 | if (process_client_data(errbuf)) |
| 796 | return -1; |
| 797 | sort_if_table(); |
| 798 | return 0; |
| 799 | } |
| 800 | |
| 801 | static int pcap_stats_acn(pcap_t *handle, struct pcap_stat *ps) { |
| 802 | unsigned char buf[12]; |
| 803 | |
| 804 | send_to_fd(handle->fd, 1, (unsigned char *)"S"); /* send the get_stats command to the IOP */ |
| 805 | |
| 806 | if (read_client_nbytes(handle->fd, sizeof(buf), buf) == -1) return -1; /* try reading the required bytes */ |
| 807 | |
| 808 | ps->ps_recv = ntohl(*(uint32_t *)&buf[0]); /* break the buffer into its three 32 bit components */ |
| 809 | ps->ps_drop = ntohl(*(uint32_t *)&buf[4]); |
| 810 | ps->ps_ifdrop = ntohl(*(uint32_t *)&buf[8]); |
| 811 | |
| 812 | return 0; |
| 813 | } |
| 814 | |
| 815 | static int acn_open_live(const char *name, char *errbuf, int *linktype) { /* returns 0 on error, else returns the file descriptor */ |
| 816 | int chassis, geoslot; |
| 817 | unit_t *u; |
| 818 | iface_t *p; |
| 819 | pcap_if_t *alldevsp; |
| 820 | |
| 821 | pcap_findalldevs_interfaces(&alldevsp, errbuf); |
| 822 | for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) { /* scan the table... */ |
| 823 | for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) { |
| 824 | u = &units[chassis][geoslot]; |
| 825 | if (u->ip != NULL) { |
| 826 | p = u->iface; |
| 827 | while (p) { /* and all interfaces... */ |
| 828 | if (p->IOPname && p->name && (strcmp(p->name, name) == 0)) { /* and if we found the interface we want... */ |
| 829 | *linktype = p->iftype; |
| 830 | open_with_IOP(u, LIVE); /* start a connection with that IOP */ |
| 831 | send_to_fd(u->fd, strlen(p->IOPname)+1, (unsigned char *)p->IOPname); /* send the IOP's interface name, and a terminating null */ |
| 832 | if (get_error_response(u->fd, errbuf)) { |
| 833 | return -1; |
| 834 | } |
| 835 | return u->fd; /* and return that open descriptor */ |
| 836 | } |
| 837 | p = p->next; |
| 838 | } |
| 839 | } |
| 840 | } |
| 841 | } |
| 842 | return -1; /* if the interface wasn't found, return an error */ |
| 843 | } |
| 844 | |
| 845 | static void acn_start_monitor(int fd, int snaplen, int timeout, int promiscuous, int direction) { |
| 846 | unsigned char buf[8]; |
| 847 | unit_t *u; |
| 848 | |
| 849 | //printf("acn_start_monitor()\n"); // fulko |
| 850 | find_unit_by_fd(fd, NULL, NULL, &u); |
| 851 | if (u->first_time == 0) { |
| 852 | buf[0] = 'M'; |
| 853 | *(uint32_t *)&buf[1] = htonl(snaplen); |
| 854 | buf[5] = timeout; |
| 855 | buf[6] = promiscuous; |
| 856 | buf[7] = direction; |
| 857 | //printf("acn_start_monitor() first time\n"); // fulko |
| 858 | send_to_fd(fd, 8, buf); /* send the start monitor command with its parameters to the IOP */ |
| 859 | u->first_time = 1; |
| 860 | } |
| 861 | //printf("acn_start_monitor() complete\n"); // fulko |
| 862 | } |
| 863 | |
| 864 | static int pcap_inject_acn(pcap_t *p, const void *buf _U_, size_t size _U_) { |
| 865 | strlcpy(p->errbuf, "Sending packets isn't supported on ACN adapters", |
| 866 | PCAP_ERRBUF_SIZE); |
| 867 | return (-1); |
| 868 | } |
| 869 | |
| 870 | static int pcap_setfilter_acn(pcap_t *handle, struct bpf_program *bpf) { |
| 871 | int fd = handle->fd; |
| 872 | int count; |
| 873 | struct bpf_insn *p; |
| 874 | uint16_t shortInt; |
| 875 | uint32_t longInt; |
| 876 | |
| 877 | send_to_fd(fd, 1, (unsigned char *)"F"); /* BPF filter follows command */ |
| 878 | count = bpf->bf_len; |
| 879 | longInt = htonl(count); |
| 880 | send_to_fd(fd, 4, (unsigned char *)&longInt); /* send the instruction sequence count */ |
| 881 | p = bpf->bf_insns; |
| 882 | while (count--) { /* followed by the list of instructions */ |
| 883 | shortInt = htons(p->code); |
| 884 | longInt = htonl(p->k); |
| 885 | send_to_fd(fd, 2, (unsigned char *)&shortInt); |
| 886 | send_to_fd(fd, 1, (unsigned char *)&p->jt); |
| 887 | send_to_fd(fd, 1, (unsigned char *)&p->jf); |
| 888 | send_to_fd(fd, 4, (unsigned char *)&longInt); |
| 889 | p++; |
| 890 | } |
| 891 | if (get_error_response(fd, NULL)) |
| 892 | return -1; |
| 893 | return 0; |
| 894 | } |
| 895 | |
| 896 | static int pcap_setdirection_acn(pcap_t *handle, pcap_direction_t d) { |
| 897 | snprintf(handle->errbuf, sizeof(handle->errbuf), |
| 898 | "Setting direction is not supported on ACN adapters"); |
| 899 | return -1; |
| 900 | } |
| 901 | |
| 902 | static int acn_read_n_bytes_with_timeout(pcap_t *handle, int count) { |
| 903 | struct timeval tv; |
| 904 | int retval, fd; |
| 905 | fd_set r_fds; |
| 906 | fd_set w_fds; |
| 907 | u_char *bp; |
| 908 | int len = 0; |
| 909 | int offset = 0; |
| 910 | |
| 911 | tv.tv_sec = 5; |
| 912 | tv.tv_usec = 0; |
| 913 | |
| 914 | fd = handle->fd; |
| 915 | FD_ZERO(&r_fds); |
| 916 | FD_SET(fd, &r_fds); |
| 917 | memcpy(&w_fds, &r_fds, sizeof(r_fds)); |
| 918 | bp = handle->bp; |
| 919 | while (count) { |
| 920 | retval = select(fd + 1, &w_fds, NULL, NULL, &tv); |
| 921 | if (retval == -1) { /* an error occured !!!!! */ |
| 922 | // fprintf(stderr, "error during packet data read\n"); |
| 923 | return -1; /* but we need to return a good indication to prevent unneccessary popups */ |
| 924 | } else if (retval == 0) { /* timeout occured, so process what we've got sofar and return */ |
| 925 | // fprintf(stderr, "timeout during packet data read\n"); |
| 926 | return -1; |
| 927 | } else { |
| 928 | if ((len = recv(fd, (bp + offset), count, 0)) <= 0) { |
| 929 | // fprintf(stderr, "premature exit during packet data rx\n"); |
| 930 | return -1; |
| 931 | } |
| 932 | count -= len; |
| 933 | offset += len; |
| 934 | } |
| 935 | } |
| 936 | return 0; |
| 937 | } |
| 938 | |
| 939 | static int pcap_read_acn(pcap_t *handle, int max_packets, pcap_handler callback, u_char *user) { |
| 940 | #define HEADER_SIZE (4 * 4) |
| 941 | unsigned char packet_header[HEADER_SIZE]; |
| 942 | struct pcap_pkthdr pcap_header; |
| 943 | |
| 944 | //printf("pcap_read_acn()\n"); // fulko |
| 945 | acn_start_monitor(handle->fd, handle->snapshot, handle->opt.timeout, handle->opt.promisc, handle->direction); /* maybe tell him to start monitoring */ |
| 946 | //printf("pcap_read_acn() after start monitor\n"); // fulko |
| 947 | |
| 948 | handle->bp = packet_header; |
| 949 | if (acn_read_n_bytes_with_timeout(handle, HEADER_SIZE) == -1) return 0; /* try to read a packet header in so we can get the sizeof the packet data */ |
| 950 | |
| 951 | pcap_header.ts.tv_sec = ntohl(*(uint32_t *)&packet_header[0]); /* tv_sec */ |
| 952 | pcap_header.ts.tv_usec = ntohl(*(uint32_t *)&packet_header[4]); /* tv_usec */ |
| 953 | pcap_header.caplen = ntohl(*(uint32_t *)&packet_header[8]); /* caplen */ |
| 954 | pcap_header.len = ntohl(*(uint32_t *)&packet_header[12]); /* len */ |
| 955 | |
| 956 | handle->bp = handle->buffer + handle->offset; /* start off the receive pointer at the right spot */ |
| 957 | if (acn_read_n_bytes_with_timeout(handle, pcap_header.caplen) == -1) return 0; /* then try to read in the rest of the data */ |
| 958 | |
| 959 | callback(user, &pcap_header, handle->bp); /* call the user supplied callback function */ |
| 960 | return 1; |
| 961 | } |
| 962 | |
| 963 | static int pcap_activate_sita(pcap_t *handle) { |
| 964 | int fd; |
| 965 | |
| 966 | if (handle->opt.rfmon) { |
| 967 | /* |
| 968 | * No monitor mode on SITA devices (they're not Wi-Fi |
| 969 | * devices). |
| 970 | */ |
| 971 | return PCAP_ERROR_RFMON_NOTSUP; |
| 972 | } |
| 973 | |
| 974 | /* Initialize some components of the pcap structure. */ |
| 975 | |
| 976 | handle->inject_op = pcap_inject_acn; |
| 977 | handle->setfilter_op = pcap_setfilter_acn; |
| 978 | handle->setdirection_op = pcap_setdirection_acn; |
| 979 | handle->set_datalink_op = NULL; /* can't change data link type */ |
| 980 | handle->getnonblock_op = pcap_getnonblock_fd; |
| 981 | handle->setnonblock_op = pcap_setnonblock_fd; |
| 982 | handle->cleanup_op = pcap_cleanup_acn; |
| 983 | handle->read_op = pcap_read_acn; |
| 984 | handle->stats_op = pcap_stats_acn; |
| 985 | |
| 986 | fd = acn_open_live(handle->opt.source, handle->errbuf, |
| 987 | &handle->linktype); |
| 988 | if (fd == -1) |
| 989 | return PCAP_ERROR; |
| 990 | handle->fd = fd; |
| 991 | handle->bufsize = handle->snapshot; |
| 992 | |
| 993 | /* Allocate the buffer */ |
| 994 | |
| 995 | handle->buffer = malloc(handle->bufsize + handle->offset); |
| 996 | if (!handle->buffer) { |
| 997 | snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, |
| 998 | "malloc: %s", pcap_strerror(errno)); |
| 999 | pcap_cleanup_acn(handle); |
| 1000 | return PCAP_ERROR; |
| 1001 | } |
| 1002 | |
| 1003 | /* |
| 1004 | * "handle->fd" is a socket, so "select()" and "poll()" |
| 1005 | * should work on it. |
| 1006 | */ |
| 1007 | handle->selectable_fd = handle->fd; |
| 1008 | |
| 1009 | return 0; |
| 1010 | } |
| 1011 | |
| 1012 | pcap_t *pcap_create_interface(const char *device, char *ebuf) { |
| 1013 | pcap_t *p; |
| 1014 | |
| 1015 | p = pcap_create_common(device, ebuf, 0); |
| 1016 | if (p == NULL) |
| 1017 | return (NULL); |
| 1018 | |
| 1019 | p->activate_op = pcap_activate_sita; |
| 1020 | return (p); |
| 1021 | } |