The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1982, 1986, 1988, 1990, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 13 | * 3. Neither the name of the University nor the names of its contributors |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | * |
| 29 | * @(#)udp_usrreq.c 8.4 (Berkeley) 1/21/94 |
| 30 | * udp_usrreq.c,v 1.4 1994/10/02 17:48:45 phk Exp |
| 31 | */ |
| 32 | |
| 33 | /* |
| 34 | * Changes and additions relating to SLiRP |
| 35 | * Copyright (c) 1995 Danny Gasparovski. |
| 36 | * |
| 37 | * Please read the file COPYRIGHT for the |
| 38 | * terms and conditions of the copyright. |
| 39 | */ |
| 40 | |
| 41 | #include <slirp.h> |
| 42 | #include "ip_icmp.h" |
| 43 | #define SLIRP_COMPILATION 1 |
| 44 | #include "sockets.h" |
| 45 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 46 | #ifdef LOG_ENABLED |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 47 | struct udpstat udpstat; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 48 | #endif |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 49 | |
| 50 | struct socket udb; |
| 51 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 52 | static u_int8_t udp_tos(struct socket *so); |
| 53 | static void udp_emu(struct socket *so, struct mbuf *m); |
| 54 | |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 55 | /* |
| 56 | * UDP protocol implementation. |
| 57 | * Per RFC 768, August, 1980. |
| 58 | */ |
| 59 | #ifndef COMPAT_42 |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 60 | #define UDPCKSUM 1 |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 61 | #else |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 62 | #define UDPCKSUM 0 /* XXX */ |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 63 | #endif |
| 64 | |
| 65 | struct socket *udp_last_so = &udb; |
| 66 | |
| 67 | void |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 68 | udp_init(void) |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 69 | { |
| 70 | udb.so_next = udb.so_prev = &udb; |
| 71 | } |
| 72 | /* m->m_data points at ip packet header |
| 73 | * m->m_len length ip packet |
| 74 | * ip->ip_len length data (IPDU) |
| 75 | */ |
| 76 | void |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 77 | udp_input(register struct mbuf *m, int iphlen) |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 78 | { |
| 79 | register struct ip *ip; |
| 80 | register struct udphdr *uh; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 81 | /* struct mbuf *opts = 0;*/ |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 82 | int len; |
| 83 | struct ip save_ip; |
| 84 | struct socket *so; |
| 85 | |
| 86 | DEBUG_CALL("udp_input"); |
| 87 | DEBUG_ARG("m = %lx", (long)m); |
| 88 | DEBUG_ARG("iphlen = %d", iphlen); |
| 89 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 90 | STAT(udpstat.udps_ipackets++); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 91 | |
| 92 | /* |
| 93 | * Strip IP options, if any; should skip this, |
| 94 | * make available to user, and use on returned packets, |
| 95 | * but we don't yet have a way to check the checksum |
| 96 | * with options still present. |
| 97 | */ |
| 98 | if(iphlen > sizeof(struct ip)) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 99 | ip_stripoptions(m, (struct mbuf *)0); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 100 | iphlen = sizeof(struct ip); |
| 101 | } |
| 102 | |
| 103 | /* |
| 104 | * Get IP and UDP header together in first mbuf. |
| 105 | */ |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 106 | ip = mtod(m, struct ip *); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 107 | uh = (struct udphdr *)((caddr_t)ip + iphlen); |
| 108 | |
| 109 | /* |
| 110 | * Make mbuf data length reflect UDP length. |
| 111 | * If not enough data to reflect UDP length, drop. |
| 112 | */ |
| 113 | len = ntohs((u_int16_t)uh->uh_ulen); |
| 114 | |
| 115 | if (ip->ip_len != len) { |
| 116 | if (len > ip->ip_len) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 117 | STAT(udpstat.udps_badlen++); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 118 | goto bad; |
| 119 | } |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 120 | m_adj(m, len - ip->ip_len); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 121 | ip->ip_len = len; |
| 122 | } |
| 123 | |
| 124 | /* |
| 125 | * Save a copy of the IP header in case we want restore it |
| 126 | * for sending an ICMP error message in response. |
| 127 | */ |
| 128 | save_ip = *ip; |
| 129 | save_ip.ip_len+= iphlen; /* tcp_input subtracts this */ |
| 130 | |
| 131 | /* |
| 132 | * Checksum extended UDP header and data. |
| 133 | */ |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 134 | if (UDPCKSUM && uh->uh_sum) { |
| 135 | memset(&((struct ipovly *)ip)->ih_mbuf, 0, sizeof(struct mbuf_ptr)); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 136 | ((struct ipovly *)ip)->ih_x1 = 0; |
| 137 | ((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
| 138 | /* keep uh_sum for ICMP reply |
| 139 | * uh->uh_sum = cksum(m, len + sizeof (struct ip)); |
| 140 | * if (uh->uh_sum) { |
| 141 | */ |
| 142 | if(cksum(m, len + sizeof(struct ip))) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 143 | STAT(udpstat.udps_badsum++); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 144 | goto bad; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * handle DHCP/BOOTP |
| 150 | */ |
| 151 | if (port_geth(uh->uh_dport) == BOOTP_SERVER) { |
| 152 | bootp_input(m); |
| 153 | goto bad; |
| 154 | } |
| 155 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 156 | if (slirp_restrict) |
| 157 | goto bad; |
| 158 | |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 159 | /* |
| 160 | * handle TFTP |
| 161 | */ |
| 162 | if (port_geth(uh->uh_dport) == TFTP_SERVER) { |
| 163 | tftp_input(m); |
| 164 | goto bad; |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Locate pcb for datagram. |
| 169 | */ |
| 170 | so = udp_last_so; |
| 171 | if (so->so_laddr_port != port_geth(uh->uh_sport) || |
| 172 | so->so_laddr_ip != ip_geth(ip->ip_src)) { |
| 173 | struct socket *tmp; |
| 174 | |
| 175 | for (tmp = udb.so_next; tmp != &udb; tmp = tmp->so_next) { |
| 176 | if (tmp->so_laddr_port == port_geth(uh->uh_sport) && |
| 177 | tmp->so_laddr_ip == ip_geth(ip->ip_src)) { |
| 178 | tmp->so_faddr_ip = ip_geth(ip->ip_dst); |
| 179 | tmp->so_faddr_port = port_geth(uh->uh_dport); |
| 180 | so = tmp; |
| 181 | break; |
| 182 | } |
| 183 | } |
| 184 | if (tmp == &udb) { |
| 185 | so = NULL; |
| 186 | } else { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 187 | STAT(udpstat.udpps_pcbcachemiss++); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 188 | udp_last_so = so; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | if (so == NULL) { |
| 193 | /* |
| 194 | * If there's no socket for this packet, |
| 195 | * create one |
| 196 | */ |
| 197 | if ((so = socreate()) == NULL) goto bad; |
| 198 | if(udp_attach(so) == -1) { |
| 199 | DEBUG_MISC((dfd," udp_attach errno = %d-%s\n", |
| 200 | errno,errno_str)); |
| 201 | sofree(so); |
| 202 | goto bad; |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * Setup fields |
| 207 | */ |
| 208 | /* udp_last_so = so; */ |
| 209 | so->so_laddr_ip = ip_geth(ip->ip_src); |
| 210 | so->so_laddr_port = port_geth(uh->uh_sport); |
| 211 | |
| 212 | if ((so->so_iptos = udp_tos(so)) == 0) |
| 213 | so->so_iptos = ip->ip_tos; |
| 214 | |
| 215 | /* |
| 216 | * XXXXX Here, check if it's in udpexec_list, |
| 217 | * and if it is, do the fork_exec() etc. |
| 218 | */ |
| 219 | } |
| 220 | |
| 221 | so->so_faddr_ip = ip_geth(ip->ip_dst); /* XXX */ |
| 222 | so->so_faddr_port = port_geth(uh->uh_dport); /* XXX */ |
| 223 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 224 | iphlen += sizeof(struct udphdr); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 225 | m->m_len -= iphlen; |
| 226 | m->m_data += iphlen; |
| 227 | |
| 228 | /* |
| 229 | * Now we sendto() the packet. |
| 230 | */ |
| 231 | if (so->so_emu) |
| 232 | udp_emu(so, m); |
| 233 | |
| 234 | if(sosendto(so,m) == -1) { |
| 235 | m->m_len += iphlen; |
| 236 | m->m_data -= iphlen; |
| 237 | *ip=save_ip; |
| 238 | DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno, errno_str)); |
| 239 | icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,errno_str); |
| 240 | } |
| 241 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 242 | m_free(so->so_m); /* used for ICMP if error on sorecvfrom */ |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 243 | |
| 244 | /* restore the orig mbuf packet */ |
| 245 | m->m_len += iphlen; |
| 246 | m->m_data -= iphlen; |
| 247 | *ip=save_ip; |
| 248 | so->so_m=m; /* ICMP backup */ |
| 249 | |
| 250 | return; |
| 251 | bad: |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 252 | m_freem(m); |
| 253 | /* if (opts) m_freem(opts); */ |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 254 | return; |
| 255 | } |
| 256 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 257 | int udp_output2_(struct socket *so, struct mbuf *m, |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 258 | const SockAddress* saddr, |
| 259 | const SockAddress* daddr, |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 260 | int iptos) |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 261 | { |
| 262 | register struct udpiphdr *ui; |
| 263 | uint32_t saddr_ip = sock_address_get_ip(saddr); |
| 264 | uint32_t daddr_ip = sock_address_get_ip(daddr); |
| 265 | int saddr_port = sock_address_get_port(saddr); |
| 266 | int daddr_port = sock_address_get_port(daddr); |
| 267 | int error = 0; |
| 268 | |
| 269 | DEBUG_CALL("udp_output"); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 270 | DEBUG_ARG("so = %lx", (long)so); |
| 271 | DEBUG_ARG("m = %lx", (long)m); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 272 | DEBUG_ARG("saddr = %lx", (long) saddr_ip); |
| 273 | DEBUG_ARG("daddr = %lx", (long) daddr_ip); |
| 274 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 275 | /* |
| 276 | * Adjust for header |
| 277 | */ |
| 278 | m->m_data -= sizeof(struct udpiphdr); |
| 279 | m->m_len += sizeof(struct udpiphdr); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 280 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 281 | /* |
| 282 | * Fill in mbuf with extended UDP header |
| 283 | * and addresses and length put into network format. |
| 284 | */ |
| 285 | ui = mtod(m, struct udpiphdr *); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 286 | memset(&ui->ui_i.ih_mbuf, 0 , sizeof(struct mbuf_ptr)); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 287 | ui->ui_x1 = 0; |
| 288 | ui->ui_pr = IPPROTO_UDP; |
| 289 | ui->ui_len = htons(m->m_len - sizeof(struct ip)); /* + sizeof (struct udphdr)); */ |
| 290 | /* XXXXX Check for from-one-location sockets, or from-any-location sockets */ |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 291 | ui->ui_src = ip_seth(saddr_ip); |
| 292 | ui->ui_dst = ip_seth(daddr_ip); |
| 293 | ui->ui_sport = port_seth(saddr_port); |
| 294 | ui->ui_dport = port_seth(daddr_port); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 295 | ui->ui_ulen = ui->ui_len; |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 296 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 297 | /* |
| 298 | * Stuff checksum and output datagram. |
| 299 | */ |
| 300 | ui->ui_sum = 0; |
| 301 | if (UDPCKSUM) { |
| 302 | if ((ui->ui_sum = cksum(m, /* sizeof (struct udpiphdr) + */ m->m_len)) == 0) |
| 303 | ui->ui_sum = 0xffff; |
| 304 | } |
| 305 | ((struct ip *)ui)->ip_len = m->m_len; |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 306 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 307 | ((struct ip *)ui)->ip_ttl = IPDEFTTL; |
| 308 | ((struct ip *)ui)->ip_tos = iptos; |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 309 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 310 | STAT(udpstat.udps_opackets++); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 311 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 312 | error = ip_output(so, m); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 313 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 314 | return (error); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 315 | } |
| 316 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 317 | int udp_output_(struct socket *so, struct mbuf *m, |
| 318 | SockAddress* from) |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 319 | { |
| 320 | SockAddress saddr, daddr; |
| 321 | uint32_t saddr_ip; |
| 322 | uint16_t saddr_port; |
| 323 | |
| 324 | saddr_ip = sock_address_get_ip(from); |
| 325 | saddr_port = sock_address_get_port(from); |
| 326 | |
| 327 | if ((so->so_faddr_ip & 0xffffff00) == special_addr_ip) { |
| 328 | saddr_ip = so->so_faddr_ip; |
| 329 | if ((so->so_faddr_ip & 0x000000ff) == 0xff) |
| 330 | saddr_ip = alias_addr_ip; |
| 331 | } |
| 332 | |
| 333 | sock_address_init_inet( &saddr, saddr_ip, saddr_port ); |
| 334 | sock_address_init_inet( &daddr, so->so_laddr_ip, so->so_laddr_port ); |
| 335 | |
| 336 | return udp_output2_(so, m, &saddr, &daddr, so->so_iptos); |
| 337 | } |
| 338 | |
| 339 | int |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 340 | udp_attach(struct socket *so) |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 341 | { |
| 342 | so->s = socket_anyaddr_server( 0, SOCKET_DGRAM ); |
| 343 | if (so->s != -1) { |
| 344 | /* success, insert in queue */ |
| 345 | so->so_expire = curtime + SO_EXPIRE; |
| 346 | insque(so,&udb); |
| 347 | } |
| 348 | return(so->s); |
| 349 | } |
| 350 | |
| 351 | void |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 352 | udp_detach(struct socket *so) |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 353 | { |
| 354 | socket_close(so->s); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 355 | /* if (so->so_m) m_free(so->so_m); done by sofree */ |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 356 | |
| 357 | sofree(so); |
| 358 | } |
| 359 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 360 | static const struct tos_t udptos[] = { |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 361 | {0, 53, IPTOS_LOWDELAY, 0}, /* DNS */ |
| 362 | {517, 517, IPTOS_LOWDELAY, EMU_TALK}, /* talk */ |
| 363 | {518, 518, IPTOS_LOWDELAY, EMU_NTALK}, /* ntalk */ |
| 364 | {0, 7648, IPTOS_LOWDELAY, EMU_CUSEEME}, /* Cu-Seeme */ |
| 365 | {0, 0, 0, 0} |
| 366 | }; |
| 367 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 368 | static u_int8_t |
| 369 | udp_tos(struct socket *so) |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 370 | { |
| 371 | int i = 0; |
| 372 | |
| 373 | while(udptos[i].tos) { |
| 374 | if ((udptos[i].fport && so->so_faddr_port == udptos[i].fport) || |
| 375 | (udptos[i].lport && so->so_laddr_port == udptos[i].lport)) { |
| 376 | so->so_emu = udptos[i].emu; |
| 377 | return udptos[i].tos; |
| 378 | } |
| 379 | i++; |
| 380 | } |
| 381 | |
| 382 | return 0; |
| 383 | } |
| 384 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 385 | |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 386 | /* |
| 387 | * Here, talk/ytalk/ntalk requests must be emulated |
| 388 | */ |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 389 | static void |
| 390 | udp_emu(struct socket *so, struct mbuf *m) |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 391 | { |
| 392 | SockAddress sockaddr; |
| 393 | |
| 394 | struct cu_header { |
| 395 | uint16_t d_family; // destination family |
| 396 | uint16_t d_port; // destination port |
| 397 | uint32_t d_addr; // destination address |
| 398 | uint16_t s_family; // source family |
| 399 | uint16_t s_port; // source port |
| 400 | uint32_t so_addr; // source address |
| 401 | uint32_t seqn; // sequence number |
| 402 | uint16_t message; // message |
| 403 | uint16_t data_type; // data type |
| 404 | uint16_t pkt_len; // packet length |
| 405 | } *cu_head; |
| 406 | |
| 407 | switch(so->so_emu) { |
| 408 | |
| 409 | case EMU_CUSEEME: |
| 410 | |
| 411 | /* |
| 412 | * Cu-SeeMe emulation. |
| 413 | * Hopefully the packet is more that 16 bytes long. We don't |
| 414 | * do any other tests, just replace the address and port |
| 415 | * fields. |
| 416 | */ |
| 417 | if (m->m_len >= sizeof (*cu_head)) { |
| 418 | if (socket_get_address(so->s, &sockaddr) < 0) |
| 419 | return; |
| 420 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 421 | cu_head = mtod(m, struct cu_header *); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 422 | cu_head->s_port = htons( sock_address_get_port(&sockaddr)); |
| 423 | cu_head->so_addr = htonl( sock_address_get_ip(&sockaddr)); |
| 424 | } |
| 425 | |
| 426 | return; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | struct socket * |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 431 | udp_listen(u_int port, u_int32_t laddr, u_int lport, int flags) |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 432 | { |
| 433 | struct socket *so; |
| 434 | SockAddress addr; |
| 435 | uint32_t addr_ip; |
| 436 | |
| 437 | if ((so = socreate()) == NULL) { |
| 438 | free(so); |
| 439 | return NULL; |
| 440 | } |
| 441 | so->s = socket_anyaddr_server( port, SOCKET_DGRAM ); |
| 442 | so->so_expire = curtime + SO_EXPIRE; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 443 | so->so_haddr_port = port; |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 444 | insque(so,&udb); |
| 445 | |
| 446 | if (so->s < 0) { |
| 447 | udp_detach(so); |
| 448 | return NULL; |
| 449 | } |
| 450 | |
| 451 | socket_get_address(so->s, &addr); |
| 452 | |
| 453 | so->so_faddr_port = sock_address_get_port(&addr); |
| 454 | addr_ip = sock_address_get_ip(&addr); |
| 455 | |
| 456 | if (addr_ip == 0 || addr_ip == loopback_addr_ip) |
| 457 | so->so_faddr_ip = alias_addr_ip; |
| 458 | else |
| 459 | so->so_faddr_ip = addr_ip; |
| 460 | |
| 461 | so->so_laddr_port = lport; |
| 462 | so->so_laddr_ip = laddr; |
| 463 | if (flags != SS_FACCEPTONCE) |
| 464 | so->so_expire = 0; |
| 465 | |
| 466 | so->so_state = SS_ISFCONNECTED; |
| 467 | |
| 468 | return so; |
| 469 | } |
| 470 | |
| 471 | int udp_unlisten (u_int port) |
| 472 | { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 473 | return slirp_unredir(1, port); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 474 | } |