jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1 | /* |
| 2 | * OpenGGSN - Gateway GPRS Support Node |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 3 | * Copyright (C) 2002, 2003 Mondru AB. |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 4 | * |
| 5 | * The contents of this file may be used under the terms of the GNU |
| 6 | * General Public License Version 2, provided that the above copyright |
| 7 | * notice and this permission notice is included in all copies or |
| 8 | * substantial portions of the software. |
| 9 | * |
| 10 | * The initial developer of the original code is |
| 11 | * Jens Jakobsen <jj@openggsn.org> |
| 12 | * |
| 13 | * Contributor(s): |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | /* |
| 18 | * sgsnemu.c |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | |
| 23 | #ifdef __linux__ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 24 | #define _GNU_SOURCE 1 /* strdup() prototype, broken arpa/inet.h */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 25 | #endif |
| 26 | |
| 27 | |
| 28 | #include <syslog.h> |
| 29 | #include <ctype.h> |
| 30 | #include <netdb.h> |
| 31 | #include <signal.h> |
| 32 | #include <stdio.h> |
| 33 | #include <string.h> |
| 34 | #include <stdlib.h> |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/socket.h> |
| 37 | #include <netinet/in.h> |
| 38 | #include <arpa/inet.h> |
| 39 | #include <sys/wait.h> |
| 40 | #include <sys/stat.h> |
| 41 | #include <unistd.h> |
| 42 | #include <sys/socket.h> |
| 43 | #include <sys/ioctl.h> |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 44 | #include <sys/time.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 45 | #include <net/if.h> |
| 46 | #include <features.h> |
| 47 | #include <errno.h> |
| 48 | #include <asm/types.h> |
| 49 | #include <sys/socket.h> |
| 50 | #include <linux/netlink.h> |
| 51 | #include <resolv.h> |
| 52 | #include <time.h> |
| 53 | |
| 54 | #include "tun.h" |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 55 | #include "ippool.h" |
| 56 | #include "syserr.h" |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 57 | #include "../gtp/pdp.h" |
| 58 | #include "../gtp/gtp.h" |
| 59 | #include "cmdline.h" |
| 60 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 61 | #define IPADDRLEN 256 /* Character length of addresses */ |
| 62 | #define MAXCONTEXTS 16 /* Max number of allowed contexts */ |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 63 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 64 | /* HASH tables for IP address allocation */ |
| 65 | struct iphash_t { |
| 66 | uint8_t inuse; /* 0=free. 1=used by somebody */ |
| 67 | struct iphash_t *ipnext; |
| 68 | struct pdp_t *pdp; |
| 69 | struct in_addr addr; |
| 70 | }; |
| 71 | struct iphash_t iparr[MAXCONTEXTS]; |
| 72 | struct iphash_t *iphash[MAXCONTEXTS]; |
| 73 | |
| 74 | /* State variable used for ping */ |
| 75 | /* 0: Idle */ |
| 76 | /* 1: Wait_connect */ |
| 77 | /* 2: Connected */ |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 78 | /* 3: Done */ |
| 79 | /* 4: Wait_disconnect */ |
| 80 | /* 5: Disconnected */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 81 | int state = 0; |
| 82 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 83 | struct gsn_t *gsn = NULL; /* GSN instance */ |
| 84 | struct tun_t *tun = NULL; /* TUN instance */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 85 | int maxfd = 0; /* For select() */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 86 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 87 | /* Struct with local versions of gengetopt options */ |
| 88 | struct { |
| 89 | int debug; /* Print debug messages */ |
| 90 | int createif; /* Create local network interface */ |
| 91 | char *ipup, *ipdown; /* Filename of scripts */ |
| 92 | int defaultroute; /* Set up default route */ |
| 93 | struct in_addr pinghost; /* Remote ping host */ |
| 94 | int pingrate; |
| 95 | int pingsize; |
| 96 | int pingcount; |
| 97 | int pingquiet; |
| 98 | struct in_addr listen; |
| 99 | struct in_addr remote; |
| 100 | struct in_addr dns; |
| 101 | int contexts; /* Number of contexts to create */ |
| 102 | int timelimit; /* Number of seconds to be connected */ |
| 103 | char *statedir; |
| 104 | uint64_t imsi; |
| 105 | struct ul255_t pco; |
| 106 | struct ul255_t qos; |
| 107 | struct ul255_t apn; |
| 108 | struct ul16_t msisdn; |
| 109 | } options; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 110 | |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 111 | |
| 112 | /* Definitions to use for PING. Most of the ping code was derived from */ |
| 113 | /* the original ping program by Mike Muuss */ |
| 114 | |
| 115 | /* IP header and ICMP echo header */ |
| 116 | #define CREATEPING_MAX 2048 |
| 117 | #define CREATEPING_IP 20 |
| 118 | #define CREATEPING_ICMP 8 |
| 119 | |
| 120 | struct ip_ping { |
| 121 | u_int8_t ipver; /* Type and header length*/ |
| 122 | u_int8_t tos; /* Type of Service */ |
| 123 | u_int16_t length; /* Total length */ |
| 124 | u_int16_t fragid; /* Identifier */ |
| 125 | u_int16_t offset; /* Flags and fragment offset */ |
| 126 | u_int8_t ttl; /* Time to live */ |
| 127 | u_int8_t protocol; /* Protocol */ |
| 128 | u_int16_t ipcheck; /* Header checksum */ |
| 129 | u_int32_t src; /* Source address */ |
| 130 | u_int32_t dst; /* Destination */ |
| 131 | u_int8_t type; /* Type and header length*/ |
| 132 | u_int8_t code; /* Code */ |
| 133 | u_int16_t checksum; /* Header checksum */ |
| 134 | u_int16_t ident; /* Identifier */ |
| 135 | u_int16_t seq; /* Sequence number */ |
| 136 | u_int8_t data[CREATEPING_MAX]; /* Data */ |
| 137 | } __attribute__((packed)); |
| 138 | |
| 139 | /* Statistical values for ping */ |
| 140 | int nreceived = 0; |
| 141 | int ntreceived = 0; |
| 142 | int ntransmitted = 0; |
| 143 | int tmin = 999999999; |
| 144 | int tmax = 0; |
| 145 | int tsum = 0; |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 146 | int pingseq = 0; /* Ping sequence counter */ |
| 147 | struct timeval firstping; |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 148 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 149 | int ipset(struct iphash_t *ipaddr, struct in_addr *addr) { |
| 150 | int hash = ippool_hash4(addr) % MAXCONTEXTS; |
| 151 | struct iphash_t *h; |
| 152 | struct iphash_t *prev = NULL; |
| 153 | ipaddr->ipnext = NULL; |
| 154 | ipaddr->addr.s_addr = addr->s_addr; |
| 155 | for (h = iphash[hash]; h; h = h->ipnext) |
| 156 | prev = h; |
| 157 | if (!prev) |
| 158 | iphash[hash] = ipaddr; |
| 159 | else |
| 160 | prev->ipnext = ipaddr; |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | int ipdel(struct iphash_t *ipaddr) { |
| 165 | int hash = ippool_hash4(&ipaddr->addr) % MAXCONTEXTS; |
| 166 | struct iphash_t *h; |
| 167 | struct iphash_t *prev = NULL; |
| 168 | for (h = iphash[hash]; h; h = h->ipnext) { |
| 169 | if (h == ipaddr) { |
| 170 | if (!prev) |
| 171 | iphash[hash] = h->ipnext; |
| 172 | else |
| 173 | prev->ipnext = h->ipnext; |
| 174 | return 0; |
| 175 | } |
| 176 | prev = h; |
| 177 | } |
| 178 | return EOF; /* End of linked list and not found */ |
| 179 | } |
| 180 | |
| 181 | int ipget(struct iphash_t **ipaddr, struct in_addr *addr) { |
| 182 | int hash = ippool_hash4(addr) % MAXCONTEXTS; |
| 183 | struct iphash_t *h; |
| 184 | for (h = iphash[hash]; h; h = h->ipnext) { |
| 185 | if ((h->addr.s_addr == addr->s_addr)) { |
| 186 | *ipaddr = h; |
| 187 | return 0; |
| 188 | } |
| 189 | } |
| 190 | return EOF; /* End of linked list and not found */ |
| 191 | } |
| 192 | |
| 193 | |
| 194 | /* Used to write process ID to file. Assume someone else will delete */ |
| 195 | void log_pid(char *pidfile) { |
| 196 | FILE *file; |
| 197 | mode_t oldmask; |
| 198 | |
| 199 | oldmask = umask(022); |
| 200 | file = fopen(pidfile, "w"); |
| 201 | umask(oldmask); |
| 202 | if(!file) |
| 203 | return; |
| 204 | fprintf(file, "%d\n", getpid()); |
| 205 | fclose(file); |
| 206 | } |
| 207 | |
| 208 | |
| 209 | int process_options(int argc, char **argv) { |
| 210 | /* gengeopt declarations */ |
| 211 | struct gengetopt_args_info args_info; |
| 212 | |
| 213 | struct hostent *host; |
| 214 | int n; |
| 215 | |
| 216 | if (cmdline_parser (argc, argv, &args_info) != 0) |
| 217 | return -1; |
| 218 | if (args_info.debug_flag) { |
| 219 | printf("remote: %s\n", args_info.remote_arg); |
| 220 | printf("listen: %s\n", args_info.listen_arg); |
| 221 | printf("conf: %s\n", args_info.conf_arg); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 222 | printf("debug: %d\n", args_info.debug_flag); |
| 223 | printf("imsi: %s\n", args_info.imsi_arg); |
| 224 | printf("qos: %#08x\n", args_info.qos_arg); |
| 225 | printf("apn: %s\n", args_info.apn_arg); |
| 226 | printf("msisdn: %s\n", args_info.msisdn_arg); |
| 227 | printf("uid: %s\n", args_info.uid_arg); |
| 228 | printf("pwd: %s\n", args_info.pwd_arg); |
| 229 | printf("pidfile: %s\n", args_info.pidfile_arg); |
| 230 | printf("statedir: %s\n", args_info.statedir_arg); |
| 231 | printf("dns: %s\n", args_info.dns_arg); |
| 232 | printf("contexts: %d\n", args_info.contexts_arg); |
| 233 | printf("timelimit: %d\n", args_info.timelimit_arg); |
| 234 | printf("createif: %d\n", args_info.createif_flag); |
| 235 | printf("ipup: %s\n", args_info.ipup_arg); |
| 236 | printf("ipdown: %s\n", args_info.ipdown_arg); |
| 237 | printf("defaultroute: %d\n", args_info.defaultroute_flag); |
| 238 | printf("pinghost: %s\n", args_info.pinghost_arg); |
| 239 | printf("pingrate: %d\n", args_info.pingrate_arg); |
| 240 | printf("pingsize: %d\n", args_info.pingsize_arg); |
| 241 | printf("pingcount: %d\n", args_info.pingcount_arg); |
| 242 | printf("pingquiet: %d\n", args_info.pingquiet_flag); |
| 243 | } |
| 244 | |
| 245 | /* Try out our new parser */ |
| 246 | |
| 247 | if (args_info.conf_arg) { |
| 248 | if (cmdline_parser_configfile (args_info.conf_arg, &args_info, 0) != 0) |
| 249 | return -1; |
| 250 | if (args_info.debug_flag) { |
| 251 | printf("cmdline_parser_configfile\n"); |
| 252 | printf("remote: %s\n", args_info.remote_arg); |
| 253 | printf("listen: %s\n", args_info.listen_arg); |
| 254 | printf("conf: %s\n", args_info.conf_arg); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 255 | printf("debug: %d\n", args_info.debug_flag); |
| 256 | printf("imsi: %s\n", args_info.imsi_arg); |
| 257 | printf("qos: %#08x\n", args_info.qos_arg); |
| 258 | printf("apn: %s\n", args_info.apn_arg); |
| 259 | printf("msisdn: %s\n", args_info.msisdn_arg); |
| 260 | printf("uid: %s\n", args_info.uid_arg); |
| 261 | printf("pwd: %s\n", args_info.pwd_arg); |
| 262 | printf("pidfile: %s\n", args_info.pidfile_arg); |
| 263 | printf("statedir: %s\n", args_info.statedir_arg); |
| 264 | printf("dns: %s\n", args_info.dns_arg); |
| 265 | printf("contexts: %d\n", args_info.contexts_arg); |
| 266 | printf("timelimit: %d\n", args_info.timelimit_arg); |
| 267 | printf("createif: %d\n", args_info.createif_flag); |
| 268 | printf("ipup: %s\n", args_info.ipup_arg); |
| 269 | printf("ipdown: %s\n", args_info.ipdown_arg); |
| 270 | printf("defaultroute: %d\n", args_info.defaultroute_flag); |
| 271 | printf("pinghost: %s\n", args_info.pinghost_arg); |
| 272 | printf("pingrate: %d\n", args_info.pingrate_arg); |
| 273 | printf("pingsize: %d\n", args_info.pingsize_arg); |
| 274 | printf("pingcount: %d\n", args_info.pingcount_arg); |
| 275 | printf("pingquiet: %d\n", args_info.pingquiet_flag); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | /* Handle each option */ |
| 280 | |
| 281 | /* foreground */ |
jjako | e607f74 | 2003-07-06 21:21:30 +0000 | [diff] [blame] | 282 | /* If fg flag not given run as a daemon */ |
| 283 | /* Do not allow sgsnemu to run as deamon |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 284 | if (!args_info.fg_flag) |
| 285 | { |
| 286 | closelog(); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 287 | freopen("/dev/null", "w", stdout); |
| 288 | freopen("/dev/null", "w", stderr); |
| 289 | freopen("/dev/null", "r", stdin); |
| 290 | daemon(0, 0); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 291 | openlog(PACKAGE, LOG_PID, LOG_DAEMON); |
jjako | e607f74 | 2003-07-06 21:21:30 +0000 | [diff] [blame] | 292 | } */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 293 | |
| 294 | /* debug */ |
| 295 | options.debug = args_info.debug_flag; |
| 296 | |
| 297 | /* pidfile */ |
| 298 | /* This has to be done after we have our final pid */ |
| 299 | if (args_info.pidfile_arg) { |
| 300 | log_pid(args_info.pidfile_arg); |
| 301 | } |
| 302 | |
| 303 | /* dns */ |
| 304 | /* If no dns option is given use system default */ |
| 305 | /* Do hostname lookup to translate hostname to IP address */ |
| 306 | printf("\n"); |
| 307 | if (args_info.dns_arg) { |
| 308 | if (!(host = gethostbyname(args_info.dns_arg))) { |
| 309 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 310 | "Invalid DNS address: %s!", args_info.dns_arg); |
| 311 | return -1; |
| 312 | } |
| 313 | else { |
| 314 | memcpy(&options.dns.s_addr, host->h_addr, host->h_length); |
| 315 | _res.nscount = 1; |
| 316 | _res.nsaddr_list[0].sin_addr = options.dns; |
| 317 | printf("Using DNS server: %s (%s)\n", |
| 318 | args_info.dns_arg, inet_ntoa(options.dns)); |
| 319 | } |
| 320 | } |
| 321 | else { |
| 322 | options.dns.s_addr= 0; |
| 323 | printf("Using default DNS server\n"); |
| 324 | } |
| 325 | |
| 326 | /* listen */ |
| 327 | /* If no listen option is specified listen to any local port */ |
| 328 | /* Do hostname lookup to translate hostname to IP address */ |
| 329 | if (args_info.listen_arg) { |
| 330 | if (!(host = gethostbyname(args_info.listen_arg))) { |
| 331 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 332 | "Invalid listening address: %s!", args_info.listen_arg); |
| 333 | return -1; |
| 334 | } |
| 335 | else { |
| 336 | memcpy(&options.listen.s_addr, host->h_addr, host->h_length); |
| 337 | printf("Local IP address is: %s (%s)\n", |
| 338 | args_info.listen_arg, inet_ntoa(options.listen)); |
| 339 | } |
| 340 | } |
| 341 | else { |
| 342 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 343 | "Listening address must be specified: %s!", args_info.listen_arg); |
| 344 | return -1; |
| 345 | } |
| 346 | |
| 347 | |
| 348 | /* remote */ |
| 349 | /* If no remote option is specified terminate */ |
| 350 | /* Do hostname lookup to translate hostname to IP address */ |
| 351 | if (args_info.remote_arg) { |
| 352 | if (!(host = gethostbyname(args_info.remote_arg))) { |
| 353 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 354 | "Invalid remote address: %s!", args_info.remote_arg); |
| 355 | return -1; |
| 356 | } |
| 357 | else { |
| 358 | memcpy(&options.remote.s_addr, host->h_addr, host->h_length); |
| 359 | printf("Remote IP address is: %s (%s)\n", |
| 360 | args_info.remote_arg, inet_ntoa(options.remote)); |
| 361 | } |
| 362 | } |
| 363 | else { |
| 364 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 365 | "No remote address given!"); |
| 366 | return -1; |
| 367 | } |
| 368 | |
| 369 | |
| 370 | /* imsi */ |
| 371 | if (strlen(args_info.imsi_arg)!=15) { |
| 372 | printf("Invalid IMSI\n"); |
| 373 | return -1; |
| 374 | } |
| 375 | options.imsi = ((uint64_t) (args_info.imsi_arg[ 0]-48)); |
| 376 | options.imsi |= ((uint64_t) (args_info.imsi_arg[ 1]-48)) << 4; |
| 377 | options.imsi |= ((uint64_t) (args_info.imsi_arg[ 2]-48)) << 8; |
| 378 | options.imsi |= ((uint64_t) (args_info.imsi_arg[ 3]-48)) << 12; |
| 379 | options.imsi |= ((uint64_t) (args_info.imsi_arg[ 4]-48)) << 16; |
| 380 | options.imsi |= ((uint64_t) (args_info.imsi_arg[ 5]-48)) << 20; |
| 381 | options.imsi |= ((uint64_t) (args_info.imsi_arg[ 6]-48)) << 24; |
| 382 | options.imsi |= ((uint64_t) (args_info.imsi_arg[ 7]-48)) << 28; |
| 383 | options.imsi |= ((uint64_t) (args_info.imsi_arg[ 8]-48)) << 32; |
| 384 | options.imsi |= ((uint64_t) (args_info.imsi_arg[ 9]-48)) << 36; |
| 385 | options.imsi |= ((uint64_t) (args_info.imsi_arg[10]-48)) << 40; |
| 386 | options.imsi |= ((uint64_t) (args_info.imsi_arg[11]-48)) << 44; |
| 387 | options.imsi |= ((uint64_t) (args_info.imsi_arg[12]-48)) << 48; |
| 388 | options.imsi |= ((uint64_t) (args_info.imsi_arg[13]-48)) << 52; |
| 389 | options.imsi |= ((uint64_t) (args_info.imsi_arg[14]-48)) << 56; |
| 390 | |
| 391 | printf("IMSI is: %s (%#08llx)\n", |
| 392 | args_info.imsi_arg, options.imsi); |
| 393 | |
| 394 | |
| 395 | /* qos */ |
| 396 | options.qos.l = 3; |
| 397 | options.qos.v[2] = (args_info.qos_arg) & 0xff; |
| 398 | options.qos.v[1] = ((args_info.qos_arg) >> 8) & 0xff; |
| 399 | options.qos.v[0] = ((args_info.qos_arg) >> 16) & 0xff; |
| 400 | |
| 401 | /* contexts */ |
| 402 | if (args_info.contexts_arg > MAXCONTEXTS) { |
| 403 | printf("Contexts has to be less than %d\n", MAXCONTEXTS); |
| 404 | return -1; |
| 405 | } |
| 406 | options.contexts = args_info.contexts_arg; |
| 407 | |
| 408 | /* Timelimit */ |
| 409 | options.timelimit = args_info.timelimit_arg; |
| 410 | |
| 411 | /* apn */ |
| 412 | if (strlen(args_info.apn_arg) > (sizeof(options.apn.v)-1)) { |
| 413 | printf("Invalid APN\n"); |
| 414 | return -1; |
| 415 | } |
| 416 | options.apn.l = strlen(args_info.apn_arg) + 1; |
| 417 | options.apn.v[0] = (char) strlen(args_info.apn_arg); |
| 418 | strncpy(&options.apn.v[1], args_info.apn_arg, sizeof(options.apn.v)-1); |
| 419 | printf("Using APN: %s\n", args_info.apn_arg); |
| 420 | |
| 421 | /* msisdn */ |
| 422 | if (strlen(args_info.msisdn_arg)>(sizeof(options.msisdn.v)-1)) { |
| 423 | printf("Invalid MSISDN\n"); |
| 424 | return -1; |
| 425 | } |
| 426 | options.msisdn.l = 1; |
| 427 | options.msisdn.v[0] = 0x91; /* International format */ |
| 428 | for(n=0; n<strlen(args_info.msisdn_arg); n++) { |
| 429 | if ((n%2) == 0) { |
| 430 | options.msisdn.v[((int)n/2)+1] = args_info.msisdn_arg[n] - 48 + 0xf0; |
| 431 | options.msisdn.l += 1; |
| 432 | } |
| 433 | else { |
| 434 | options.msisdn.v[((int)n/2)+1] = |
| 435 | (options.msisdn.v[((int)n/2)+1] & 0x0f) + |
| 436 | (args_info.msisdn_arg[n] - 48) * 16; |
| 437 | } |
| 438 | } |
| 439 | printf("Using MSISDN: %s\n", args_info.msisdn_arg); |
| 440 | |
| 441 | /* UID and PWD */ |
| 442 | /* Might need to also insert stuff like DNS etc. */ |
| 443 | if ((strlen(args_info.uid_arg) + strlen(args_info.pwd_arg) + 10)> |
| 444 | (sizeof(options.pco.v)-1)) { |
| 445 | printf("invalid UID and PWD\n"); |
| 446 | return -1; |
| 447 | } |
| 448 | options.pco.l = strlen(args_info.uid_arg) + strlen(args_info.pwd_arg) + 10; |
| 449 | options.pco.v[0] = 0x80; /* PPP */ |
| 450 | options.pco.v[1] = 0xc0; /* PAP */ |
| 451 | options.pco.v[2] = 0x23; |
| 452 | options.pco.v[3] = 0x12; /* Length of protocol contents */ |
| 453 | options.pco.v[4] = 0x01; /* Authenticate request */ |
| 454 | options.pco.v[5] = 0x01; |
| 455 | options.pco.v[6] = 0x00; /* MSB of length */ |
| 456 | options.pco.v[7] = strlen(args_info.uid_arg) + strlen(args_info.pwd_arg) + 6; |
| 457 | options.pco.v[8] = strlen(args_info.uid_arg); |
| 458 | memcpy(&options.pco.v[9], args_info.uid_arg, strlen(args_info.uid_arg)); |
| 459 | options.pco.v[9+strlen(args_info.uid_arg)] = strlen(args_info.pwd_arg); |
| 460 | memcpy(&options.pco.v[10+strlen(args_info.uid_arg)], |
| 461 | args_info.pwd_arg, strlen(args_info.pwd_arg)); |
| 462 | |
| 463 | /* createif */ |
| 464 | options.createif = args_info.createif_flag; |
| 465 | |
| 466 | /* ipup */ |
| 467 | options.ipup = args_info.ipup_arg; |
| 468 | |
| 469 | /* ipdown */ |
| 470 | options.ipdown = args_info.ipdown_arg; |
| 471 | |
| 472 | /* statedir */ |
| 473 | options.statedir = args_info.statedir_arg; |
| 474 | |
| 475 | /* defaultroute */ |
| 476 | options.defaultroute = args_info.defaultroute_flag; |
| 477 | |
| 478 | |
| 479 | /* pinghost */ |
| 480 | /* Store ping host as in_addr */ |
| 481 | if (args_info.pinghost_arg) { |
| 482 | if (!inet_aton(args_info.pinghost_arg, &options.pinghost)) { |
| 483 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 484 | "Invalid ping host: %s!", args_info.pinghost_arg); |
| 485 | return -1; |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | /* Other ping parameters */ |
| 490 | options.pingrate = args_info.pingrate_arg; |
| 491 | options.pingsize = args_info.pingsize_arg; |
| 492 | options.pingcount = args_info.pingcount_arg; |
| 493 | options.pingquiet = args_info.pingquiet_flag; |
| 494 | |
| 495 | return 0; |
| 496 | |
| 497 | } |
| 498 | |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 499 | |
| 500 | int encaps_printf(struct pdp_t *pdp, void *pack, unsigned len) { |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 501 | int i; |
| 502 | printf("The packet looks like this:\n"); |
| 503 | for( i=0; i<len; i++) { |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 504 | printf("%02x ", (unsigned char)*(char *)(pack+i)); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 505 | if (!((i+1)%16)) printf("\n"); |
| 506 | }; |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 507 | printf("\n"); |
| 508 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 509 | } |
| 510 | |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 511 | char * print_ipprot(int t) { |
| 512 | switch (t) { |
| 513 | case 1: return "ICMP"; |
| 514 | case 6: return "TCP"; |
| 515 | case 17: return "UDP"; |
| 516 | default: return "Unknown"; |
| 517 | }; |
| 518 | } |
| 519 | |
| 520 | |
| 521 | char * print_icmptype(int t) { |
| 522 | static char *ttab[] = { |
| 523 | "Echo Reply", |
| 524 | "ICMP 1", |
| 525 | "ICMP 2", |
| 526 | "Dest Unreachable", |
| 527 | "Source Quench", |
| 528 | "Redirect", |
| 529 | "ICMP 6", |
| 530 | "ICMP 7", |
| 531 | "Echo", |
| 532 | "ICMP 9", |
| 533 | "ICMP 10", |
| 534 | "Time Exceeded", |
| 535 | "Parameter Problem", |
| 536 | "Timestamp", |
| 537 | "Timestamp Reply", |
| 538 | "Info Request", |
| 539 | "Info Reply" |
| 540 | }; |
| 541 | if( t < 0 || t > 16 ) |
| 542 | return("OUT-OF-RANGE"); |
| 543 | return(ttab[t]); |
| 544 | } |
| 545 | |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 546 | /* Calculate time left until we have to send off next ping packet */ |
| 547 | int ping_timeout(struct timeval *tp) { |
| 548 | struct timezone tz; |
| 549 | struct timeval tv; |
| 550 | int diff; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 551 | if ((options.pinghost.s_addr) && (2 == state) && |
| 552 | ((pingseq < options.pingcount) || (options.pingcount == 0))) { |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 553 | gettimeofday(&tv, &tz); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 554 | diff = 1000000 / options.pingrate * pingseq - |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 555 | 1000000 * (tv.tv_sec - firstping.tv_sec) - |
| 556 | (tv.tv_usec - firstping.tv_usec); /* Microseconds safe up to 500 sec */ |
| 557 | tp->tv_sec = 0; |
| 558 | if (diff > 0) |
| 559 | tp->tv_usec = diff; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 560 | else { |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 561 | /* For some reason we get packet loss if set to zero */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 562 | tp->tv_usec = 100000 / options.pingrate; /* 10 times pingrate */ |
| 563 | tp->tv_usec = 0; |
| 564 | } |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 565 | } |
| 566 | return 0; |
| 567 | } |
| 568 | |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 569 | /* Print out statistics when at the end of ping sequence */ |
| 570 | int ping_finish() |
| 571 | { |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 572 | struct timezone tz; |
| 573 | struct timeval tv; |
| 574 | int elapsed; |
| 575 | gettimeofday(&tv, &tz); |
| 576 | elapsed = 1000000 * (tv.tv_sec - firstping.tv_sec) + |
| 577 | (tv.tv_usec - firstping.tv_usec); /* Microseconds */ |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 578 | printf("\n"); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 579 | printf("\n----%s PING Statistics----\n", inet_ntoa(options.pinghost)); |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 580 | printf("%d packets transmitted in %.3f seconds, ", ntransmitted, |
| 581 | elapsed / 1000000.0); |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 582 | printf("%d packets received, ", nreceived ); |
| 583 | if (ntransmitted) { |
| 584 | if( nreceived > ntransmitted) |
| 585 | printf("-- somebody's printing up packets!"); |
| 586 | else |
| 587 | printf("%d%% packet loss", |
| 588 | (int) (((ntransmitted-nreceived)*100) / |
| 589 | ntransmitted)); |
| 590 | } |
| 591 | printf("\n"); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 592 | if (options.debug) printf("%d packets received in total\n", ntreceived ); |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 593 | if (nreceived && tsum) |
| 594 | printf("round-trip (ms) min/avg/max = %.3f/%.3f/%.3f\n\n", |
| 595 | tmin/1000.0, |
| 596 | tsum/1000.0/nreceived, |
| 597 | tmax/1000.0 ); |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 598 | printf("%d packets transmitted \n", ntreceived ); |
| 599 | |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 600 | ntransmitted = 0; |
| 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | /* Handle a received ping packet. Print out line and update statistics. */ |
| 605 | int encaps_ping(struct pdp_t *pdp, void *pack, unsigned len) { |
| 606 | struct timezone tz; |
| 607 | struct timeval tv; |
| 608 | struct timeval *tp; |
| 609 | struct ip_ping *pingpack = pack; |
| 610 | struct in_addr src; |
| 611 | int triptime; |
| 612 | |
| 613 | src.s_addr = pingpack->src; |
| 614 | |
| 615 | gettimeofday(&tv, &tz); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 616 | if (options.debug) printf("%d.%6d ", (int) tv.tv_sec, (int) tv.tv_usec); |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 617 | |
| 618 | if (len < CREATEPING_IP + CREATEPING_ICMP) { |
| 619 | printf("packet too short (%d bytes) from %s\n", len, |
| 620 | inet_ntoa(src)); |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | ntreceived++; |
| 625 | if (pingpack->protocol != 1) { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 626 | if (!options.pingquiet) printf("%d bytes from %s: ip_protocol=%d (%s)\n", |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 627 | len, inet_ntoa(src), pingpack->protocol, |
| 628 | print_ipprot(pingpack->protocol)); |
| 629 | return 0; |
| 630 | } |
| 631 | |
| 632 | if (pingpack->type != 0) { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 633 | if (!options.pingquiet) printf("%d bytes from %s: icmp_type=%d (%s) icmp_code=%d\n", |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 634 | len, inet_ntoa(src), pingpack->type, |
| 635 | print_icmptype(pingpack->type), pingpack->code); |
| 636 | return 0; |
| 637 | } |
| 638 | |
| 639 | nreceived++; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 640 | if (!options.pingquiet) printf("%d bytes from %s: icmp_seq=%d", len, |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 641 | inet_ntoa(src), ntohs(pingpack->seq)); |
| 642 | |
| 643 | if (len >= sizeof(struct timeval) + CREATEPING_IP + CREATEPING_ICMP) { |
| 644 | gettimeofday(&tv, &tz); |
| 645 | tp = (struct timeval *) pingpack->data; |
| 646 | if( (tv.tv_usec -= tp->tv_usec) < 0 ) { |
| 647 | tv.tv_sec--; |
| 648 | tv.tv_usec += 1000000; |
| 649 | } |
| 650 | tv.tv_sec -= tp->tv_sec; |
| 651 | |
| 652 | triptime = tv.tv_sec*1000000+(tv.tv_usec); |
| 653 | tsum += triptime; |
| 654 | if( triptime < tmin ) |
| 655 | tmin = triptime; |
| 656 | if( triptime > tmax ) |
| 657 | tmax = triptime; |
| 658 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 659 | if (!options.pingquiet) printf(" time=%.3f ms\n", triptime/1000.0); |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 660 | |
| 661 | } |
| 662 | else |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 663 | if (!options.pingquiet) printf("\n"); |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 664 | return 0; |
| 665 | } |
| 666 | |
| 667 | /* Create a new ping packet and send it off to peer. */ |
| 668 | int create_ping(void *gsn, struct pdp_t *pdp, |
| 669 | struct in_addr *dst, int seq, int datasize) { |
| 670 | |
| 671 | struct ip_ping pack; |
| 672 | u_int16_t *p = (u_int16_t *) &pack; |
| 673 | u_int8_t *p8 = (u_int8_t *) &pack; |
| 674 | struct in_addr src; |
| 675 | int n; |
| 676 | long int sum = 0; |
| 677 | int count = 0; |
| 678 | |
| 679 | struct timezone tz; |
| 680 | struct timeval *tp = (struct timeval *) &p8[CREATEPING_IP + CREATEPING_ICMP]; |
| 681 | |
| 682 | if (datasize > CREATEPING_MAX) { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 683 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 684 | "Ping size to large: %d!", datasize); |
| 685 | return -1; |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | memcpy(&src, &(pdp->eua.v[2]), 4); /* Copy a 4 byte address */ |
| 689 | |
| 690 | pack.ipver = 0x45; |
| 691 | pack.tos = 0x00; |
| 692 | pack.length = htons(CREATEPING_IP + CREATEPING_ICMP + datasize); |
| 693 | pack.fragid = 0x0000; |
| 694 | pack.offset = 0x0040; |
| 695 | pack.ttl = 0x40; |
| 696 | pack.protocol = 0x01; |
| 697 | pack.ipcheck = 0x0000; |
| 698 | pack.src = src.s_addr; |
| 699 | pack.dst = dst->s_addr; |
| 700 | pack.type = 0x08; |
| 701 | pack.code = 0x00; |
| 702 | pack.checksum = 0x0000; |
| 703 | pack.ident = 0x0000; |
| 704 | pack.seq = htons(seq); |
| 705 | |
| 706 | /* Generate ICMP payload */ |
| 707 | p8 = (u_int8_t *) &pack + CREATEPING_IP + CREATEPING_ICMP; |
| 708 | for (n=0; n<(datasize); n++) p8[n] = n; |
| 709 | |
| 710 | if (datasize >= sizeof(struct timeval)) |
| 711 | gettimeofday(tp, &tz); |
| 712 | |
| 713 | /* Calculate IP header checksum */ |
| 714 | p = (u_int16_t *) &pack; |
| 715 | count = CREATEPING_IP; |
| 716 | sum = 0; |
| 717 | while (count>1) { |
| 718 | sum += *p++; |
| 719 | count -= 2; |
| 720 | } |
| 721 | while (sum>>16) |
| 722 | sum = (sum & 0xffff) + (sum >> 16); |
| 723 | pack.ipcheck = ~sum; |
| 724 | |
| 725 | |
| 726 | /* Calculate ICMP checksum */ |
| 727 | count = CREATEPING_ICMP + datasize; /* Length of ICMP message */ |
| 728 | sum = 0; |
| 729 | p = (u_int16_t *) &pack; |
| 730 | p += CREATEPING_IP / 2; |
| 731 | while (count>1) { |
| 732 | sum += *p++; |
| 733 | count -= 2; |
| 734 | } |
| 735 | if (count>0) |
| 736 | sum += * (unsigned char *) p; |
| 737 | while (sum>>16) |
| 738 | sum = (sum & 0xffff) + (sum >> 16); |
| 739 | pack.checksum = ~sum; |
| 740 | |
| 741 | ntransmitted++; |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 742 | return gtp_gpdu(gsn, pdp, &pack, 28 + datasize); |
| 743 | } |
| 744 | |
| 745 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 746 | int delete_context(struct pdp_t *pdp) { |
| 747 | |
| 748 | if (tun && options.ipdown) tun_runscript(tun, options.ipdown); |
| 749 | |
| 750 | ipdel((struct iphash_t*) pdp->peer); |
| 751 | memset(pdp->peer, 0, sizeof(struct iphash_t)); /* To be sure */ |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 752 | |
| 753 | if (1 == options.contexts) |
| 754 | state = 5; /* Disconnected */ |
| 755 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 756 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 757 | } |
| 758 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 759 | |
| 760 | /* Callback for receiving messages from tun */ |
| 761 | int cb_tun_ind(struct tun_t *tun, void *pack, unsigned len) { |
| 762 | struct iphash_t *ipm; |
| 763 | struct in_addr src; |
| 764 | struct tun_packet_t *iph = (struct tun_packet_t*) pack; |
| 765 | |
| 766 | src.s_addr = iph->src; |
| 767 | |
| 768 | if (ipget(&ipm, &src)) { |
| 769 | printf("Received packet without a valid source address!!!\n"); |
| 770 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 771 | } |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 772 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 773 | if (ipm->pdp) /* Check if a peer protocol is defined */ |
| 774 | gtp_gpdu(gsn, ipm->pdp, pack, len); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | int create_pdp_conf(struct pdp_t *pdp, int cause) { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 779 | struct in_addr addr; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 780 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 781 | if (cause != 128) { |
| 782 | printf("Received create PDP context response. Cause value: %d\n", cause); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 783 | state = 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 784 | return EOF; /* Not what we expected */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 785 | } |
| 786 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 787 | if (pdp_euaton(&pdp->eua, &addr)) { |
| 788 | printf("Received create PDP context response. Cause value: %d\n", cause); |
| 789 | state = 0; |
| 790 | return EOF; /* Not a valid IP address */ |
| 791 | } |
| 792 | |
| 793 | printf("Received create PDP context response. IP address: %s\n", |
| 794 | inet_ntoa(addr)); |
| 795 | |
| 796 | if (options.createif) { |
| 797 | struct in_addr m; |
| 798 | inet_aton("255.255.255.255", &m); |
| 799 | /* printf("Setting up interface and routing\n");*/ |
| 800 | tun_addaddr(tun, &addr, &addr, &m); |
| 801 | if (options.defaultroute) { |
| 802 | struct in_addr rm; |
| 803 | rm.s_addr = 0; |
| 804 | tun_addroute(tun, &rm, &addr, &rm); |
| 805 | } |
| 806 | if (options.ipup) tun_runscript(tun, options.ipup); |
| 807 | } |
| 808 | |
| 809 | ipset((struct iphash_t*) pdp->peer, &addr); |
| 810 | |
| 811 | state = 2; /* Connected */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 812 | |
| 813 | return 0; |
| 814 | } |
| 815 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 816 | int delete_pdp_conf(struct pdp_t *pdp, int cause) { |
| 817 | printf("Received delete PDP context response. Cause value: %d\n", cause); |
| 818 | return 0; |
| 819 | } |
| 820 | |
| 821 | int echo_conf(struct pdp_t *pdp, int cause) { |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 822 | if (cause <0) { |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 823 | printf("Echo request timed out\n"); |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 824 | state = 0; |
| 825 | } |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 826 | else |
| 827 | printf("Received echo response.\n"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 828 | return 0; |
| 829 | } |
| 830 | |
| 831 | int conf(int type, int cause, struct pdp_t* pdp, void *aid) { |
| 832 | /* if (cause < 0) return 0; Some error occurred. We don't care */ |
| 833 | switch (type) { |
| 834 | case GTP_ECHO_REQ: |
| 835 | return echo_conf(pdp, cause); |
| 836 | case GTP_CREATE_PDP_REQ: |
| 837 | if (cause !=128) return 0; /* Request not accepted. We don't care */ |
| 838 | return create_pdp_conf(pdp, cause); |
| 839 | case GTP_DELETE_PDP_REQ: |
| 840 | if (cause !=128) return 0; /* Request not accepted. We don't care */ |
| 841 | return delete_pdp_conf(pdp, cause); |
| 842 | default: |
| 843 | return 0; |
| 844 | } |
| 845 | } |
| 846 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 847 | |
| 848 | int encaps_tun(struct pdp_t *pdp, void *pack, unsigned len) { |
| 849 | /* printf("encaps_tun. Packet received: forwarding to tun\n");*/ |
| 850 | return tun_encaps((struct tun_t*) pdp->ipif, pack, len); |
| 851 | } |
| 852 | |
| 853 | int main(int argc, char **argv) |
| 854 | { |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 855 | fd_set fds; /* For select() */ |
| 856 | struct timeval idleTime; /* How long to select() */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 857 | struct pdp_t *pdp; |
| 858 | int n; |
| 859 | int starttime = time(NULL); /* Time program was started */ |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 860 | int stoptime = 0; /* Time to exit */ |
| 861 | int pingtimeout = 0; /* Time to print ping statistics */ |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 862 | |
| 863 | struct timezone tz; /* Used for calculating ping times */ |
| 864 | struct timeval tv; |
| 865 | int diff; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 866 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 867 | /* open a connection to the syslog daemon */ |
| 868 | /*openlog(PACKAGE, LOG_PID, LOG_DAEMON);*/ |
| 869 | openlog(PACKAGE, (LOG_PID | LOG_PERROR), LOG_DAEMON); |
| 870 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 871 | /* Process options given in configuration file and command line */ |
| 872 | if (process_options(argc, argv)) |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 873 | exit(1); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 874 | |
| 875 | printf("\nInitialising GTP library\n"); |
jjako | e607f74 | 2003-07-06 21:21:30 +0000 | [diff] [blame] | 876 | if (gtp_new(&gsn, options.statedir, &options.listen, GTP_MODE_SGSN)) { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 877 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 878 | "Failed to create gtp"); |
| 879 | exit(1); |
| 880 | } |
| 881 | if (gsn->fd > maxfd) maxfd = gsn->fd; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 882 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 883 | gtp_set_cb_delete_context(gsn, delete_context); |
| 884 | gtp_set_cb_conf(gsn, conf); |
| 885 | if (options.createif) |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 886 | gtp_set_cb_gpdu(gsn, encaps_tun); |
| 887 | else |
| 888 | gtp_set_cb_gpdu(gsn, encaps_ping); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 889 | |
| 890 | if (options.createif) { |
| 891 | printf("Setting up interface\n"); |
| 892 | /* Create a tunnel interface */ |
| 893 | if (tun_new((struct tun_t**) &tun)) { |
| 894 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 895 | "Failed to create tun"); |
| 896 | exit(1); |
| 897 | } |
| 898 | tun_set_cb_ind(tun, cb_tun_ind); |
| 899 | if (tun->fd > maxfd) maxfd = tun->fd; |
| 900 | } |
| 901 | |
| 902 | /* Initialise hash tables */ |
| 903 | memset(&iphash, 0, sizeof(iphash)); |
| 904 | memset(&iparr, 0, sizeof(iparr)); |
| 905 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 906 | printf("Done initialising GTP library\n\n"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 907 | |
| 908 | /* See if anybody is there */ |
| 909 | printf("Sending off echo request\n"); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 910 | gtp_echo_req(gsn, &options.remote); /* See if remote is alive ? */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 911 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 912 | for(n=0; n<options.contexts; n++) { |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 913 | printf("Setting up PDP context #%d\n", n); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 914 | iparr[n].inuse = 1; /* TODO */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 915 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 916 | /* Allocated here. Cleaned up in gtp.c:*/ |
| 917 | pdp_newpdp(&pdp, options.imsi, n, NULL); |
| 918 | |
| 919 | pdp->peer = &iparr[n]; |
| 920 | pdp->ipif = tun; /* TODO */ |
| 921 | iparr[n].pdp = pdp; |
| 922 | |
| 923 | if (options.qos.l > sizeof(pdp->qos_req0)) { |
| 924 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, "QoS length too big"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 925 | exit(1); |
| 926 | } |
| 927 | else { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 928 | memcpy(pdp->qos_req0, options.qos.v, options.qos.l); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 929 | } |
| 930 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 931 | pdp->selmode = 0x01; /* MS provided APN, subscription not verified */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 932 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 933 | if (options.apn.l > sizeof(pdp->apn_use.v)) { |
| 934 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, "APN length too big"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 935 | exit(1); |
| 936 | } |
| 937 | else { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 938 | pdp->apn_use.l = options.apn.l; |
| 939 | memcpy(pdp->apn_use.v, options.apn.v, options.apn.l); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 940 | } |
| 941 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 942 | pdp->gsnlc.l = sizeof(options.listen); |
| 943 | memcpy(pdp->gsnlc.v, &options.listen, sizeof(options.listen)); |
| 944 | pdp->gsnlu.l = sizeof(options.listen); |
| 945 | memcpy(pdp->gsnlu.v, &options.listen, sizeof(options.listen)); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 946 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 947 | if (options.msisdn.l > sizeof(pdp->msisdn.v)) { |
| 948 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, "MSISDN length too big"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 949 | exit(1); |
| 950 | } |
| 951 | else { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 952 | pdp->msisdn.l = options.msisdn.l; |
| 953 | memcpy(pdp->msisdn.v, options.msisdn.v, options.msisdn.l); |
| 954 | } |
| 955 | |
| 956 | ipv42eua(&pdp->eua, NULL); /* Request dynamic IP address */ |
| 957 | |
| 958 | if (options.pco.l > sizeof(pdp->pco_req.v)) { |
| 959 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, "PCO length too big"); |
| 960 | exit(1); |
| 961 | } |
| 962 | else { |
| 963 | pdp->pco_req.l = options.pco.l; |
| 964 | memcpy(pdp->pco_req.v, options.pco.v, options.pco.l); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 965 | } |
| 966 | |
| 967 | /* Create context */ |
| 968 | /* We send this of once. Retransmissions are handled by gtplib */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 969 | gtp_create_context(gsn, pdp, NULL, &options.remote); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 970 | } |
| 971 | |
| 972 | state = 1; /* Enter wait_connection state */ |
| 973 | |
| 974 | printf("Waiting for response from ggsn........\n\n"); |
| 975 | |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 976 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 977 | /******************************************************************/ |
| 978 | /* Main select loop */ |
| 979 | /******************************************************************/ |
| 980 | |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 981 | while ((0 != state) && (5 != state)) { |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 982 | |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 983 | /* Take down client after timeout after disconnect */ |
| 984 | if ((4 == state) && ((stoptime) <= time(NULL))) { |
| 985 | state = 5; |
| 986 | } |
| 987 | |
| 988 | /* Take down client after timelimit timeout */ |
| 989 | if ((2 == state) && (options.timelimit) && |
| 990 | ((starttime + options.timelimit) <= time(NULL))) { |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 991 | state = 3; |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 992 | } |
| 993 | |
| 994 | /* Take down client after ping timeout */ |
| 995 | if ((2 == state) && (pingtimeout) && (pingtimeout <= time(NULL))) { |
| 996 | state = 3; |
| 997 | } |
| 998 | |
| 999 | /* Set pingtimeout for later disconnection */ |
| 1000 | if (options.pingcount && ntransmitted >= options.pingcount) { |
| 1001 | pingtimeout = time(NULL) + 5; /* Extra seconds */ |
| 1002 | } |
| 1003 | |
| 1004 | /* Print statistics if no more ping packets are missing */ |
| 1005 | if (ntransmitted && options.pingcount && nreceived >= options.pingcount) { |
| 1006 | ping_finish(); |
| 1007 | if (!options.createif) |
| 1008 | state = 3; |
| 1009 | } |
| 1010 | |
| 1011 | /* Send of disconnect */ |
| 1012 | if (3 == state) { |
| 1013 | state = 4; |
| 1014 | stoptime = time(NULL) + 5; /* Extra seconds to allow disconnect */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1015 | for(n=0; n<options.contexts; n++) { |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1016 | /* Delete context */ |
| 1017 | printf("Disconnecting PDP context #%d\n", n); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1018 | gtp_delete_context(gsn, iparr[n].pdp, NULL); |
| 1019 | if ((options.pinghost.s_addr !=0) && ntransmitted) ping_finish(); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1020 | } |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 1021 | } |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 1022 | |
| 1023 | /* Send of ping packets */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1024 | diff = 0; |
| 1025 | while (( diff<=0 ) && |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 1026 | /* Send off an ICMP ping packet */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1027 | /*if (*/(options.pinghost.s_addr) && (2 == state) && |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 1028 | ((pingseq < options.pingcount) || (options.pingcount == 0))) { |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 1029 | if (!pingseq) gettimeofday(&firstping, &tz); /* Set time of first ping */ |
| 1030 | gettimeofday(&tv, &tz); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1031 | diff = 1000000 / options.pingrate * pingseq - |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 1032 | 1000000 * (tv.tv_sec - firstping.tv_sec) - |
| 1033 | (tv.tv_usec - firstping.tv_usec); /* Microseconds safe up to 500 sec */ |
| 1034 | if (diff <=0) { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1035 | if (options.debug) printf("Create_ping %d\n", diff); |
| 1036 | create_ping(gsn, iparr[pingseq % options.contexts].pdp, |
| 1037 | &options.pinghost, pingseq, options.pingsize); |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 1038 | pingseq++; |
| 1039 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1040 | } |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 1041 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1042 | FD_ZERO(&fds); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1043 | if (tun) FD_SET(tun->fd, &fds); |
| 1044 | FD_SET(gsn->fd, &fds); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1045 | |
| 1046 | gtp_retranstimeout(gsn, &idleTime); |
jjako | afb2a97 | 2003-01-29 21:04:13 +0000 | [diff] [blame] | 1047 | ping_timeout(&idleTime); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1048 | |
| 1049 | if (options.debug) printf("idletime.tv_sec %d, idleTime.tv_usec %d\n", |
| 1050 | (int) idleTime.tv_sec, (int) idleTime.tv_usec); |
| 1051 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1052 | switch (select(maxfd + 1, &fds, NULL, NULL, &idleTime)) { |
| 1053 | case -1: |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1054 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 1055 | "Select returned -1"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1056 | break; |
| 1057 | case 0: |
| 1058 | gtp_retrans(gsn); /* Only retransmit if nothing else */ |
| 1059 | break; |
| 1060 | default: |
| 1061 | break; |
| 1062 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1063 | |
| 1064 | if ((tun) && FD_ISSET(tun->fd, &fds) && tun_decaps(tun) < 0) { |
| 1065 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 1066 | "TUN decaps failed"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1067 | } |
| 1068 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1069 | if (FD_ISSET(gsn->fd, &fds)) |
| 1070 | gtp_decaps(gsn); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1071 | |
jjako | 5da6845 | 2003-01-28 16:08:47 +0000 | [diff] [blame] | 1072 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1073 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1074 | gtp_free(gsn); /* Clean up the gsn instance */ |
| 1075 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1076 | if (options.createif) |
| 1077 | tun_free(tun); |
jjako | 7b8fad4 | 2003-07-07 14:37:42 +0000 | [diff] [blame] | 1078 | |
| 1079 | if (0 == state) |
| 1080 | exit(1); /* Indicate error */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1081 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 1082 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1083 | } |
| 1084 | |