jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1 | /* |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 2 | * OpenGGSN - Gateway GPRS Support Node |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 3 | * Copyright (C) 2002, 2003, 2004 Mondru AB. |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 4 | * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 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. |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 9 | * |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | /* ggsn.c |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #ifdef __linux__ |
| 17 | #define _GNU_SOURCE 1 /* strdup() prototype, broken arpa/inet.h */ |
| 18 | #endif |
| 19 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 20 | #include "../config.h" |
| 21 | |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 22 | #include <osmocom/core/application.h> |
| 23 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 24 | #ifdef HAVE_STDINT_H |
| 25 | #include <stdint.h> |
| 26 | #endif |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 27 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 28 | #include <ctype.h> |
| 29 | #include <netdb.h> |
| 30 | #include <signal.h> |
| 31 | #include <stdio.h> |
| 32 | #include <string.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <sys/types.h> |
| 35 | #include <sys/socket.h> |
| 36 | #include <netinet/in.h> |
Harald Welte | 63ebccd | 2017-08-02 21:10:09 +0200 | [diff] [blame] | 37 | #include <netinet/ip.h> |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 38 | #include <netinet/ip6.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 39 | #include <arpa/inet.h> |
| 40 | #include <sys/wait.h> |
| 41 | #include <sys/stat.h> |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 42 | #include <fcntl.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 43 | #include <unistd.h> |
Max | 727417d | 2016-08-02 17:10:38 +0200 | [diff] [blame] | 44 | #include <inttypes.h> |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 45 | #include <sys/socket.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 46 | #include <sys/ioctl.h> |
| 47 | #include <net/if.h> |
Harald Welte | 63ebccd | 2017-08-02 21:10:09 +0200 | [diff] [blame] | 48 | #include <net/if.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 49 | |
| 50 | #include <errno.h> |
| 51 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 52 | #include <time.h> |
| 53 | |
Max | 727417d | 2016-08-02 17:10:38 +0200 | [diff] [blame] | 54 | #include <osmocom/core/select.h> |
| 55 | #include <osmocom/ctrl/control_if.h> |
| 56 | #include <osmocom/ctrl/control_cmd.h> |
| 57 | #include <osmocom/ctrl/ports.h> |
| 58 | |
Emmanuel Bretelle | 2a10368 | 2010-09-07 17:01:20 +0200 | [diff] [blame] | 59 | #include "../lib/tun.h" |
| 60 | #include "../lib/ippool.h" |
| 61 | #include "../lib/syserr.h" |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 62 | #include "../lib/in46_addr.h" |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 63 | #include "../gtp/pdp.h" |
| 64 | #include "../gtp/gtp.h" |
| 65 | #include "cmdline.h" |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 66 | #include "gtp-kernel.h" |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame^] | 67 | #include "icmpv6.h" |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 68 | |
Harald Welte | c3dcba0 | 2010-05-04 11:02:54 +0200 | [diff] [blame] | 69 | int end = 0; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 70 | int maxfd = 0; /* For select() */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 71 | |
| 72 | struct in_addr listen_; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 73 | struct in_addr netaddr, destaddr, net; /* Network interface */ |
| 74 | size_t prefixlen; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 75 | struct in_addr dns1, dns2; /* PCO DNS address */ |
| 76 | char *ipup, *ipdown; /* Filename of scripts */ |
| 77 | int debug; /* Print debug output */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 78 | struct ul255_t pco; |
| 79 | struct ul255_t qos; |
| 80 | struct ul255_t apn; |
| 81 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 82 | struct gsn_t *gsn; /* GSN instance */ |
| 83 | struct tun_t *tun; /* TUN instance */ |
| 84 | struct ippool_t *ippool; /* Pool of IP addresses */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 85 | |
Harald Welte | c3dcba0 | 2010-05-04 11:02:54 +0200 | [diff] [blame] | 86 | /* To exit gracefully. Used with GCC compilation flag -pg and gprof */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 87 | void signal_handler(int s) |
| 88 | { |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 89 | DEBUGP(DGGSN, "Received signal %d, exiting.\n", s); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 90 | end = 1; |
Harald Welte | c3dcba0 | 2010-05-04 11:02:54 +0200 | [diff] [blame] | 91 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 92 | |
| 93 | /* Used to write process ID to file. Assume someone else will delete */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 94 | void log_pid(char *pidfile) |
| 95 | { |
| 96 | FILE *file; |
| 97 | mode_t oldmask; |
| 98 | |
| 99 | oldmask = umask(022); |
| 100 | file = fopen(pidfile, "w"); |
| 101 | umask(oldmask); |
| 102 | if (!file) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 103 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 104 | "Failed to create process ID file: %s!", pidfile); |
| 105 | return; |
| 106 | } |
| 107 | fprintf(file, "%d\n", (int)getpid()); |
| 108 | fclose(file); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 109 | } |
| 110 | |
jjako | bd937b7 | 2004-12-30 16:22:42 +0000 | [diff] [blame] | 111 | #if defined(__sun__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 112 | int daemon(int nochdir, int noclose) |
| 113 | { |
| 114 | int fd; |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 115 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 116 | switch (fork()) { |
| 117 | case -1: |
| 118 | return (-1); |
| 119 | case 0: |
| 120 | break; |
| 121 | default: |
| 122 | _exit(0); |
| 123 | } |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 124 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 125 | if (setsid() == -1) |
| 126 | return (-1); |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 127 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 128 | if (!nochdir) |
| 129 | chdir("/"); |
| 130 | |
| 131 | if (!noclose && (fd = open("/dev/null", O_RDWR, 0)) != -1) { |
| 132 | dup2(fd, STDIN_FILENO); |
| 133 | dup2(fd, STDOUT_FILENO); |
| 134 | dup2(fd, STDERR_FILENO); |
| 135 | if (fd > 2) |
| 136 | close(fd); |
| 137 | } |
| 138 | return (0); |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 139 | } |
| 140 | #endif |
| 141 | |
Max | 3142d8d | 2017-05-04 17:45:10 +0200 | [diff] [blame] | 142 | static bool send_trap(const struct gsn_t *gsn, const struct pdp_t *pdp, const struct ippoolm_t *member, const char *var) |
| 143 | { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 144 | char addrbuf[256]; |
Max | 3142d8d | 2017-05-04 17:45:10 +0200 | [diff] [blame] | 145 | char val[NAMESIZE]; |
| 146 | |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 147 | const char *addrstr = in46a_ntop(&member->addr, addrbuf, sizeof(addrbuf)); |
| 148 | |
| 149 | snprintf(val, sizeof(val), "%" PRIu64 ",%s", pdp->imsi, addrstr); |
Max | 3142d8d | 2017-05-04 17:45:10 +0200 | [diff] [blame] | 150 | |
| 151 | if (ctrl_cmd_send_trap(gsn->ctrl, var, val) < 0) { |
| 152 | LOGP(DGGSN, LOGL_ERROR, "Failed to create and send TRAP for IMSI %" PRIu64 " [%s].\n", pdp->imsi, var); |
| 153 | return false; |
| 154 | } |
| 155 | return true; |
| 156 | } |
| 157 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 158 | int delete_context(struct pdp_t *pdp) |
| 159 | { |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 160 | DEBUGP(DGGSN, "Deleting PDP context\n"); |
Max | 727417d | 2016-08-02 17:10:38 +0200 | [diff] [blame] | 161 | struct ippoolm_t *member = pdp->peer; |
Max | dbd7024 | 2016-10-14 13:38:05 +0200 | [diff] [blame] | 162 | |
| 163 | if (pdp->peer) { |
Max | 3142d8d | 2017-05-04 17:45:10 +0200 | [diff] [blame] | 164 | send_trap(gsn, pdp, member, "imsi-rem-ip"); /* TRAP with IP removal */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 165 | ippool_freeip(ippool, (struct ippoolm_t *)pdp->peer); |
Max | dbd7024 | 2016-10-14 13:38:05 +0200 | [diff] [blame] | 166 | } else |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 167 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Peer not defined!"); |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 168 | |
| 169 | if (gtp_kernel_tunnel_del(pdp)) { |
| 170 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
| 171 | "Cannot delete tunnel from kernel: %s\n", |
| 172 | strerror(errno)); |
| 173 | } |
| 174 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 175 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 176 | } |
| 177 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 178 | int create_context_ind(struct pdp_t *pdp) |
| 179 | { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 180 | struct in46_addr addr; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 181 | struct ippoolm_t *member; |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 182 | int rc; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 183 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 184 | DEBUGP(DGGSN, "Received create PDP context request\n"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 185 | |
Harald Welte | d9d8862 | 2017-08-04 00:22:35 +0200 | [diff] [blame] | 186 | /* FIXME: we manually force all context requests to dynamic here! */ |
| 187 | if (pdp->eua.l > 2) |
| 188 | pdp->eua.l = 2; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 189 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 190 | memcpy(pdp->qos_neg0, pdp->qos_req0, sizeof(pdp->qos_req0)); |
| 191 | memcpy(&pdp->pco_neg, &pco, sizeof(pdp->pco_neg)); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 192 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 193 | memcpy(pdp->qos_neg.v, pdp->qos_req.v, pdp->qos_req.l); /* TODO */ |
| 194 | pdp->qos_neg.l = pdp->qos_req.l; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 195 | |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 196 | if (in46a_from_eua(&pdp->eua, &addr)) { |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 197 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Cannot decode EUA from MS/SGSN: %s", |
| 198 | osmo_hexdump(pdp->eua.v, pdp->eua.l)); |
| 199 | gtp_create_context_resp(gsn, pdp, GTPCAUSE_UNKNOWN_PDP); |
| 200 | return 0; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 201 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 202 | |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 203 | rc = ippool_newip(ippool, &member, &addr, 0); |
| 204 | if (rc < 0) { |
| 205 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Cannot allocate IP address in pool\n"); |
| 206 | gtp_create_context_resp(gsn, pdp, -rc); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 207 | return 0; /* Allready in use, or no more available */ |
| 208 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 209 | |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame^] | 210 | if (addr.len == sizeof(struct in6_addr)) { |
| 211 | struct in46_addr tmp; |
| 212 | /* IPv6 doesn't really send the real/allocated address at this point, but just |
| 213 | * the link-identifier which the MS shall use for router solicitation */ |
| 214 | tmp.len = addr.len; |
| 215 | /* initialize upper 64 bits to prefix, they are discarded by MS anyway */ |
| 216 | memcpy(tmp.v6.s6_addr, &member->addr.v6, 8); |
| 217 | /* use allocated 64bit prefix as lower 64bit, used as link id by MS */ |
| 218 | memcpy(tmp.v6.s6_addr+8, &member->addr.v6, 8); |
| 219 | in46a_to_eua(&tmp, &pdp->eua); |
| 220 | } else |
| 221 | in46a_to_eua(&member->addr, &pdp->eua); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 222 | pdp->peer = member; |
| 223 | pdp->ipif = tun; /* TODO */ |
| 224 | member->peer = pdp; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 225 | |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame^] | 226 | /* TODO: In IPv6, EUA doesn't contain the actual IP addr/prefix! */ |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 227 | if (gtp_kernel_tunnel_add(pdp) < 0) { |
Andreas Schultz | c5fbf9b | 2015-11-17 12:22:43 +0100 | [diff] [blame] | 228 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 229 | "Cannot add tunnel to kernel: %s\n", strerror(errno)); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 230 | gtp_create_context_resp(gsn, pdp, GTPCAUSE_SYS_FAIL); |
| 231 | return 0; |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 232 | } |
Max | 3142d8d | 2017-05-04 17:45:10 +0200 | [diff] [blame] | 233 | |
| 234 | if (!send_trap(gsn, pdp, member, "imsi-ass-ip")) { /* TRAP with IP assignment */ |
Max | 727417d | 2016-08-02 17:10:38 +0200 | [diff] [blame] | 235 | gtp_create_context_resp(gsn, pdp, GTPCAUSE_NO_RESOURCES); |
| 236 | return 0; |
| 237 | } |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 238 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 239 | gtp_create_context_resp(gsn, pdp, GTPCAUSE_ACC_REQ); |
| 240 | return 0; /* Success */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 241 | } |
| 242 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 243 | /* Callback for receiving messages from tun */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 244 | int cb_tun_ind(struct tun_t *tun, void *pack, unsigned len) |
| 245 | { |
| 246 | struct ippoolm_t *ipm; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 247 | struct in46_addr dst; |
Harald Welte | 63ebccd | 2017-08-02 21:10:09 +0200 | [diff] [blame] | 248 | struct iphdr *iph = (struct iphdr *)pack; |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 249 | struct ip6_hdr *ip6h = (struct ip6_hdr *)pack; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 250 | |
Harald Welte | 63ebccd | 2017-08-02 21:10:09 +0200 | [diff] [blame] | 251 | if (iph->version == 4) { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 252 | if (len < sizeof(*iph) || len < 4*iph->ihl) |
| 253 | return -1; |
| 254 | dst.len = 4; |
Harald Welte | 63ebccd | 2017-08-02 21:10:09 +0200 | [diff] [blame] | 255 | dst.v4.s_addr = iph->daddr; |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 256 | } else if (iph->version == 6) { |
Harald Welte | d4d6e09 | 2017-08-08 18:10:43 +0200 | [diff] [blame] | 257 | /* Due to the fact that 3GPP requires an allocation of a |
| 258 | * /64 prefix to each MS, we must instruct |
| 259 | * ippool_getip() below to match only the leading /64 |
| 260 | * prefix, i.e. the first 8 bytes of the address */ |
| 261 | dst.len = 8; |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 262 | dst.v6 = ip6h->ip6_dst; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 263 | } else { |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 264 | LOGP(DGGSN, LOGL_NOTICE, "non-IPv packet received from tun\n"); |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 265 | return -1; |
| 266 | } |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 267 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 268 | DEBUGP(DGGSN, "Received packet from tun!\n"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 269 | |
| 270 | if (ippool_getip(ippool, &ipm, &dst)) { |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 271 | DEBUGP(DGGSN, "Received packet with no destination!!!\n"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | if (ipm->peer) /* Check if a peer protocol is defined */ |
| 276 | gtp_data_req(gsn, (struct pdp_t *)ipm->peer, pack, len); |
| 277 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 278 | } |
| 279 | |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame^] | 280 | /* RFC3307 link-local scope multicast address */ |
| 281 | static const struct in6_addr all_router_mcast_addr = { |
| 282 | .s6_addr = { 0xff,0x02,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,2 } |
| 283 | }; |
| 284 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 285 | int encaps_tun(struct pdp_t *pdp, void *pack, unsigned len) |
| 286 | { |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame^] | 287 | struct iphdr *iph = (struct iphdr *)pack; |
| 288 | struct ip6_hdr *ip6h = (struct ip6_hdr *)pack; |
| 289 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 290 | DEBUGP(DGGSN, "encaps_tun. Packet received: forwarding to tun\n"); |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame^] | 291 | |
| 292 | switch (iph->version) { |
| 293 | case 6: |
| 294 | /* daddr: all-routers multicast addr */ |
| 295 | if (IN6_ARE_ADDR_EQUAL(&ip6h->ip6_dst, &all_router_mcast_addr)) |
| 296 | return handle_router_mcast(gsn, pdp, pack, len); |
| 297 | break; |
| 298 | case 4: |
| 299 | break; |
| 300 | default: |
| 301 | LOGP(DGGSN, LOGL_ERROR, "Packet from MS is neither IPv4 nor IPv6\n"); |
| 302 | return -1; |
| 303 | } |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 304 | return tun_encaps((struct tun_t *)pdp->ipif, pack, len); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 305 | } |
| 306 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 307 | int main(int argc, char **argv) |
| 308 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 309 | /* gengeopt declarations */ |
| 310 | struct gengetopt_args_info args_info; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 311 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 312 | struct hostent *host; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 313 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 314 | /* Handle keyboard interrupt SIGINT */ |
| 315 | struct sigaction s; |
| 316 | s.sa_handler = (void *)signal_handler; |
| 317 | if ((0 != sigemptyset(&s.sa_mask)) && debug) |
| 318 | printf("sigemptyset failed.\n"); |
| 319 | s.sa_flags = SA_RESETHAND; |
| 320 | if ((sigaction(SIGINT, &s, NULL) != 0) && debug) |
| 321 | printf("Could not register SIGINT signal handler.\n"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 322 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 323 | fd_set fds; /* For select() */ |
| 324 | struct timeval idleTime; /* How long to select() */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 325 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 326 | int timelimit; /* Number of seconds to be connected */ |
| 327 | int starttime; /* Time program was started */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 328 | |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 329 | osmo_init_logging(&log_info); |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 330 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 331 | if (cmdline_parser(argc, argv, &args_info) != 0) |
| 332 | exit(1); |
| 333 | if (args_info.debug_flag) { |
| 334 | printf("listen: %s\n", args_info.listen_arg); |
| 335 | if (args_info.conf_arg) |
| 336 | printf("conf: %s\n", args_info.conf_arg); |
| 337 | printf("fg: %d\n", args_info.fg_flag); |
| 338 | printf("debug: %d\n", args_info.debug_flag); |
| 339 | printf("qos: %#08x\n", args_info.qos_arg); |
| 340 | if (args_info.apn_arg) |
| 341 | printf("apn: %s\n", args_info.apn_arg); |
| 342 | if (args_info.net_arg) |
| 343 | printf("net: %s\n", args_info.net_arg); |
| 344 | if (args_info.dynip_arg) |
| 345 | printf("dynip: %s\n", args_info.dynip_arg); |
| 346 | if (args_info.statip_arg) |
| 347 | printf("statip: %s\n", args_info.statip_arg); |
| 348 | if (args_info.ipup_arg) |
| 349 | printf("ipup: %s\n", args_info.ipup_arg); |
| 350 | if (args_info.ipdown_arg) |
| 351 | printf("ipdown: %s\n", args_info.ipdown_arg); |
| 352 | if (args_info.pidfile_arg) |
| 353 | printf("pidfile: %s\n", args_info.pidfile_arg); |
| 354 | if (args_info.statedir_arg) |
| 355 | printf("statedir: %s\n", args_info.statedir_arg); |
Pablo Neira Ayuso | d9d7be3 | 2016-05-10 18:43:12 +0200 | [diff] [blame] | 356 | if (args_info.gtp_linux_flag) |
| 357 | printf("gtp_linux: %d\n", args_info.gtp_linux_flag); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 358 | printf("timelimit: %d\n", args_info.timelimit_arg); |
| 359 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 360 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 361 | /* Try out our new parser */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 362 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 363 | if (cmdline_parser_configfile(args_info.conf_arg, &args_info, 0, 0, 0) |
| 364 | != 0) |
| 365 | exit(1); |
Holger Hans Peter Freyther | 9c0ff4f | 2014-03-23 10:07:26 +0100 | [diff] [blame] | 366 | |
| 367 | /* Open a log file */ |
| 368 | if (args_info.logfile_arg) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 369 | struct log_target *tgt; |
Holger Hans Peter Freyther | c38bf64 | 2014-12-04 18:54:58 +0100 | [diff] [blame] | 370 | int lvl; |
| 371 | |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 372 | tgt = log_target_find(LOG_TGT_TYPE_FILE, args_info.logfile_arg); |
| 373 | if (!tgt) { |
| 374 | tgt = log_target_create_file(args_info.logfile_arg); |
| 375 | if (!tgt) { |
| 376 | LOGP(DGGSN, LOGL_ERROR, |
| 377 | "Failed to create logfile: %s\n", |
| 378 | args_info.logfile_arg); |
| 379 | exit(1); |
| 380 | } |
| 381 | log_add_target(tgt); |
Holger Hans Peter Freyther | 9c0ff4f | 2014-03-23 10:07:26 +0100 | [diff] [blame] | 382 | } |
Holger Hans Peter Freyther | c38bf64 | 2014-12-04 18:54:58 +0100 | [diff] [blame] | 383 | log_set_all_filter(tgt, 1); |
| 384 | log_set_use_color(tgt, 0); |
| 385 | |
| 386 | if (args_info.loglevel_arg) { |
| 387 | lvl = log_parse_level(args_info.loglevel_arg); |
| 388 | log_set_log_level(tgt, lvl); |
| 389 | LOGP(DGGSN, LOGL_NOTICE, |
| 390 | "Set file log level to %s\n", |
| 391 | log_level_str(lvl)); |
| 392 | } |
Holger Hans Peter Freyther | 9c0ff4f | 2014-03-23 10:07:26 +0100 | [diff] [blame] | 393 | } |
| 394 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 395 | if (args_info.debug_flag) { |
| 396 | printf("cmdline_parser_configfile\n"); |
| 397 | printf("listen: %s\n", args_info.listen_arg); |
| 398 | printf("conf: %s\n", args_info.conf_arg); |
| 399 | printf("fg: %d\n", args_info.fg_flag); |
| 400 | printf("debug: %d\n", args_info.debug_flag); |
| 401 | printf("qos: %#08x\n", args_info.qos_arg); |
| 402 | if (args_info.apn_arg) |
| 403 | printf("apn: %s\n", args_info.apn_arg); |
| 404 | if (args_info.net_arg) |
| 405 | printf("net: %s\n", args_info.net_arg); |
| 406 | if (args_info.dynip_arg) |
| 407 | printf("dynip: %s\n", args_info.dynip_arg); |
| 408 | if (args_info.statip_arg) |
| 409 | printf("statip: %s\n", args_info.statip_arg); |
| 410 | if (args_info.ipup_arg) |
| 411 | printf("ipup: %s\n", args_info.ipup_arg); |
| 412 | if (args_info.ipdown_arg) |
| 413 | printf("ipdown: %s\n", args_info.ipdown_arg); |
| 414 | if (args_info.pidfile_arg) |
| 415 | printf("pidfile: %s\n", args_info.pidfile_arg); |
| 416 | if (args_info.statedir_arg) |
| 417 | printf("statedir: %s\n", args_info.statedir_arg); |
Pablo Neira Ayuso | d9d7be3 | 2016-05-10 18:43:12 +0200 | [diff] [blame] | 418 | if (args_info.gtp_linux_flag) |
| 419 | printf("gtp-linux: %d\n", args_info.gtp_linux_flag); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 420 | printf("timelimit: %d\n", args_info.timelimit_arg); |
| 421 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 422 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 423 | /* Handle each option */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 424 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 425 | /* debug */ |
| 426 | debug = args_info.debug_flag; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 427 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 428 | /* listen */ |
| 429 | /* Do hostname lookup to translate hostname to IP address */ |
| 430 | /* Any port listening is not possible as a valid address is */ |
| 431 | /* required for create_pdp_context_response messages */ |
| 432 | if (args_info.listen_arg) { |
| 433 | if (!(host = gethostbyname(args_info.listen_arg))) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 434 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 435 | "Invalid listening address: %s!", |
| 436 | args_info.listen_arg); |
| 437 | exit(1); |
| 438 | } else { |
| 439 | memcpy(&listen_.s_addr, host->h_addr, host->h_length); |
| 440 | } |
| 441 | } else { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 442 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 443 | "Listening address must be specified! " |
| 444 | "Please use command line option --listen or " |
| 445 | "edit %s configuration file\n", args_info.conf_arg); |
| 446 | exit(1); |
| 447 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 448 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 449 | /* net */ |
| 450 | /* Store net as in_addr net and mask */ |
| 451 | if (args_info.net_arg) { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 452 | struct in46_addr in46; |
| 453 | if (ippool_aton(&in46, &prefixlen, args_info.net_arg, 0)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 454 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 455 | "Invalid network address: %s!", |
| 456 | args_info.net_arg); |
| 457 | exit(1); |
| 458 | } |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 459 | net.s_addr = in46.v4.s_addr; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 460 | netaddr.s_addr = htonl(ntohl(net.s_addr) + 1); |
| 461 | destaddr.s_addr = htonl(ntohl(net.s_addr) + 1); |
| 462 | } else { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 463 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 464 | "Network address must be specified: %s!", |
| 465 | args_info.net_arg); |
| 466 | exit(1); |
| 467 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 468 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 469 | /* dynip */ |
| 470 | if (!args_info.dynip_arg) { |
| 471 | if (ippool_new(&ippool, args_info.net_arg, NULL, 1, 0, |
| 472 | IPPOOL_NONETWORK | IPPOOL_NOGATEWAY | |
| 473 | IPPOOL_NOBROADCAST)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 474 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 475 | "Failed to allocate IP pool!"); |
| 476 | exit(1); |
| 477 | } |
| 478 | } else { |
| 479 | if (ippool_new(&ippool, args_info.dynip_arg, NULL, 1, 0, |
| 480 | IPPOOL_NONETWORK | IPPOOL_NOGATEWAY | |
| 481 | IPPOOL_NOBROADCAST)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 482 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 483 | "Failed to allocate IP pool!"); |
| 484 | exit(1); |
| 485 | } |
| 486 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 487 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 488 | /* DNS1 and DNS2 */ |
jjako | ff9985c | 2004-01-16 11:05:22 +0000 | [diff] [blame] | 489 | #ifdef HAVE_INET_ATON |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 490 | dns1.s_addr = 0; |
| 491 | if (args_info.pcodns1_arg) { |
| 492 | if (0 == inet_aton(args_info.pcodns1_arg, &dns1)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 493 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 494 | "Failed to convert pcodns1!"); |
| 495 | exit(1); |
| 496 | } |
| 497 | } |
| 498 | dns2.s_addr = 0; |
| 499 | if (args_info.pcodns2_arg) { |
| 500 | if (0 == inet_aton(args_info.pcodns2_arg, &dns2)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 501 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 502 | "Failed to convert pcodns2!"); |
| 503 | exit(1); |
| 504 | } |
| 505 | } |
jjako | 1d3db97 | 2004-01-16 09:56:56 +0000 | [diff] [blame] | 506 | #else |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 507 | dns1.s_addr = 0; |
| 508 | if (args_info.pcodns1_arg) { |
| 509 | dns1.s_addr = inet_addr(args_info.pcodns1_arg); |
| 510 | if (dns1.s_addr == -1) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 511 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 512 | "Failed to convert pcodns1!"); |
| 513 | exit(1); |
| 514 | } |
| 515 | } |
| 516 | dns2.s_addr = 0; |
| 517 | if (args_info.pcodns2_arg) { |
| 518 | dns2.s_addr = inet_addr(args_info.pcodns2_arg); |
| 519 | if (dns2.s_addr == -1) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 520 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 521 | "Failed to convert pcodns2!"); |
| 522 | exit(1); |
| 523 | } |
| 524 | } |
jjako | 1d3db97 | 2004-01-16 09:56:56 +0000 | [diff] [blame] | 525 | #endif |
| 526 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 527 | pco.l = 20; |
| 528 | pco.v[0] = 0x80; /* x0000yyy x=1, yyy=000: PPP */ |
| 529 | pco.v[1] = 0x80; /* IPCP */ |
| 530 | pco.v[2] = 0x21; |
| 531 | pco.v[3] = 0x10; /* Length of contents */ |
| 532 | pco.v[4] = 0x02; /* ACK */ |
| 533 | pco.v[5] = 0x00; /* ID: Need to match request */ |
| 534 | pco.v[6] = 0x00; /* Length */ |
| 535 | pco.v[7] = 0x10; |
| 536 | pco.v[8] = 0x81; /* DNS 1 */ |
| 537 | pco.v[9] = 0x06; |
| 538 | memcpy(&pco.v[10], &dns1, sizeof(dns1)); |
| 539 | pco.v[14] = 0x83; |
| 540 | pco.v[15] = 0x06; /* DNS 2 */ |
| 541 | memcpy(&pco.v[16], &dns2, sizeof(dns2)); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 542 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 543 | /* ipup */ |
| 544 | ipup = args_info.ipup_arg; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 545 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 546 | /* ipdown */ |
| 547 | ipdown = args_info.ipdown_arg; |
jjako | 4b26b51 | 2003-01-28 16:13:57 +0000 | [diff] [blame] | 548 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 549 | /* Timelimit */ |
| 550 | timelimit = args_info.timelimit_arg; |
| 551 | starttime = time(NULL); |
jjako | 4b26b51 | 2003-01-28 16:13:57 +0000 | [diff] [blame] | 552 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 553 | /* qos */ |
| 554 | qos.l = 3; |
| 555 | qos.v[2] = (args_info.qos_arg) & 0xff; |
| 556 | qos.v[1] = ((args_info.qos_arg) >> 8) & 0xff; |
| 557 | qos.v[0] = ((args_info.qos_arg) >> 16) & 0xff; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 558 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 559 | /* apn */ |
| 560 | if (strlen(args_info.apn_arg) > (sizeof(apn.v) - 1)) { |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 561 | LOGP(DGGSN, LOGL_ERROR, "Invalid APN\n"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 562 | return -1; |
| 563 | } |
| 564 | apn.l = strlen(args_info.apn_arg) + 1; |
| 565 | apn.v[0] = (char)strlen(args_info.apn_arg); |
| 566 | strncpy((char *)&apn.v[1], args_info.apn_arg, sizeof(apn.v) - 1); |
jjako | e014978 | 2003-07-06 17:07:04 +0000 | [diff] [blame] | 567 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 568 | /* foreground */ |
| 569 | /* If flag not given run as a daemon */ |
| 570 | if (!args_info.fg_flag) { |
| 571 | FILE *f; |
| 572 | int rc; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 573 | /* Close the standard file descriptors. */ |
| 574 | /* Is this really needed ? */ |
| 575 | f = freopen("/dev/null", "w", stdout); |
| 576 | if (f == NULL) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 577 | SYS_ERR(DGGSN, LOGL_NOTICE, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 578 | "Could not redirect stdout to /dev/null"); |
| 579 | } |
| 580 | f = freopen("/dev/null", "w", stderr); |
| 581 | if (f == NULL) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 582 | SYS_ERR(DGGSN, LOGL_NOTICE, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 583 | "Could not redirect stderr to /dev/null"); |
| 584 | } |
| 585 | f = freopen("/dev/null", "r", stdin); |
| 586 | if (f == NULL) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 587 | SYS_ERR(DGGSN, LOGL_NOTICE, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 588 | "Could not redirect stdin to /dev/null"); |
| 589 | } |
| 590 | rc = daemon(0, 0); |
| 591 | if (rc != 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 592 | SYS_ERR(DGGSN, LOGL_ERROR, rc, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 593 | "Could not daemonize"); |
| 594 | exit(1); |
| 595 | } |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 596 | } |
jjako | e014978 | 2003-07-06 17:07:04 +0000 | [diff] [blame] | 597 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 598 | /* pidfile */ |
| 599 | /* This has to be done after we have our final pid */ |
| 600 | if (args_info.pidfile_arg) { |
| 601 | log_pid(args_info.pidfile_arg); |
| 602 | } |
jjako | e014978 | 2003-07-06 17:07:04 +0000 | [diff] [blame] | 603 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 604 | DEBUGP(DGGSN, "gtpclient: Initialising GTP tunnel\n"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 605 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 606 | if (gtp_new(&gsn, args_info.statedir_arg, &listen_, GTP_MODE_GGSN)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 607 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Failed to create gtp"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 608 | exit(1); |
| 609 | } |
| 610 | if (gsn->fd0 > maxfd) |
| 611 | maxfd = gsn->fd0; |
| 612 | if (gsn->fd1c > maxfd) |
| 613 | maxfd = gsn->fd1c; |
| 614 | if (gsn->fd1u > maxfd) |
| 615 | maxfd = gsn->fd1u; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 616 | |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 617 | /* use GTP kernel module for data packet encapsulation */ |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 618 | if (gtp_kernel_init(gsn, &net, prefixlen, &args_info) < 0) |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 619 | goto err; |
| 620 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 621 | gtp_set_cb_data_ind(gsn, encaps_tun); |
| 622 | gtp_set_cb_delete_context(gsn, delete_context); |
| 623 | gtp_set_cb_create_context_ind(gsn, create_context_ind); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 624 | |
Max | 727417d | 2016-08-02 17:10:38 +0200 | [diff] [blame] | 625 | gsn->ctrl = ctrl_interface_setup(NULL, OSMO_CTRL_PORT_GGSN, NULL); |
| 626 | if (!gsn->ctrl) { |
| 627 | LOGP(DGGSN, LOGL_ERROR, "Failed to create CTRL interface.\n"); |
| 628 | exit(1); |
| 629 | } |
| 630 | |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 631 | /* skip the configuration of the tun0 if we're using the gtp0 device */ |
| 632 | if (gtp_kernel_enabled()) |
| 633 | goto skip_tun; |
| 634 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 635 | /* Create a tunnel interface */ |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 636 | DEBUGP(DGGSN, "Creating tun interface\n"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 637 | if (tun_new((struct tun_t **)&tun)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 638 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Failed to create tun"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 639 | exit(1); |
| 640 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 641 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 642 | DEBUGP(DGGSN, "Setting tun IP address\n"); |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 643 | if (tun_setaddr(tun, &netaddr, &destaddr, &prefixlen)) { |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 644 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Failed to set tun IP address"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 645 | exit(1); |
| 646 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 647 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 648 | tun_set_cb_ind(tun, cb_tun_ind); |
| 649 | if (tun->fd > maxfd) |
| 650 | maxfd = tun->fd; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 651 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 652 | if (ipup) |
| 653 | tun_runscript(tun, ipup); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 654 | |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 655 | skip_tun: |
| 656 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 657 | /******************************************************************/ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 658 | /* Main select loop */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 659 | /******************************************************************/ |
| 660 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 661 | while ((((starttime + timelimit) > time(NULL)) || (0 == timelimit)) |
| 662 | && (!end)) { |
Harald Welte | c3dcba0 | 2010-05-04 11:02:54 +0200 | [diff] [blame] | 663 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 664 | FD_ZERO(&fds); |
| 665 | if (tun) |
| 666 | FD_SET(tun->fd, &fds); |
| 667 | FD_SET(gsn->fd0, &fds); |
| 668 | FD_SET(gsn->fd1c, &fds); |
| 669 | FD_SET(gsn->fd1u, &fds); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 670 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 671 | gtp_retranstimeout(gsn, &idleTime); |
| 672 | switch (select(maxfd + 1, &fds, NULL, NULL, &idleTime)) { |
| 673 | case -1: /* errno == EINTR : unblocked signal */ |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 674 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 675 | "select() returned -1"); |
| 676 | /* On error, select returns without modifying fds */ |
| 677 | FD_ZERO(&fds); |
| 678 | break; |
| 679 | case 0: |
| 680 | /* printf("Select returned 0\n"); */ |
| 681 | gtp_retrans(gsn); /* Only retransmit if nothing else */ |
| 682 | break; |
| 683 | default: |
| 684 | break; |
| 685 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 686 | |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 687 | if (tun && tun->fd != -1 && FD_ISSET(tun->fd, &fds) && |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 688 | tun_decaps(tun) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 689 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 690 | "TUN read failed (fd)=(%d)", tun->fd); |
| 691 | } |
| 692 | |
| 693 | if (FD_ISSET(gsn->fd0, &fds)) |
| 694 | gtp_decaps0(gsn); |
| 695 | |
| 696 | if (FD_ISSET(gsn->fd1c, &fds)) |
| 697 | gtp_decaps1c(gsn); |
| 698 | |
| 699 | if (FD_ISSET(gsn->fd1u, &fds)) |
| 700 | gtp_decaps1u(gsn); |
| 701 | |
Max | 727417d | 2016-08-02 17:10:38 +0200 | [diff] [blame] | 702 | osmo_select_main(1); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 703 | } |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 704 | err: |
| 705 | gtp_kernel_stop(); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 706 | cmdline_parser_free(&args_info); |
| 707 | ippool_free(ippool); |
| 708 | gtp_free(gsn); |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 709 | if (tun) |
| 710 | tun_free(tun); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 711 | |
| 712 | return 1; |
| 713 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 714 | } |