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 | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 73 | struct in46_addr netaddr, destaddr, net; /* Network interface */ |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 74 | size_t prefixlen; |
Harald Welte | 1ae9877 | 2017-08-09 20:28:52 +0200 | [diff] [blame] | 75 | struct in46_addr dns1, dns2; /* PCO DNS address */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 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 | |
Harald Welte | b10ee08 | 2017-08-12 19:29:16 +0200 | [diff] [blame] | 149 | snprintf(val, sizeof(val), "%s,%s", imsi_gtp2str(&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 | 1ae9877 | 2017-08-09 20:28:52 +0200 | [diff] [blame] | 178 | #include <osmocom/gsm/tlv.h> |
| 179 | |
| 180 | /* 3GPP TS 24.008 10.6.5.3 */ |
| 181 | enum pco_protocols { |
| 182 | PCO_P_LCP = 0xC021, |
| 183 | PCO_P_PAP = 0xC023, |
| 184 | PCO_P_CHAP = 0xC223, |
| 185 | PCO_P_IPCP = 0x8021, |
| 186 | PCO_P_PCSCF_ADDR = 0x0001, |
| 187 | PCO_P_IM_CN_SS_F = 0x0002, |
| 188 | PCO_P_DNS_IPv6_ADDR = 0x0003, |
| 189 | PCO_P_POLICY_CTRL_REJ = 0x0004, /* only in Network->MS */ |
| 190 | PCO_P_MS_SUP_NETREQ_BCI = 0x0005, |
| 191 | /* reserved */ |
| 192 | PCO_P_DSMIPv6_HA_ADDR = 0x0007, |
| 193 | PCO_P_DSMIPv6_HN_PREF = 0x0008, |
| 194 | PCO_P_DSMIPv6_v4_HA_ADDR= 0x0009, |
| 195 | PCO_P_IP_ADDR_VIA_NAS = 0x000a, /* only MS->Network */ |
| 196 | PCO_P_IPv4_ADDR_VIA_DHCP= 0x000b, /* only MS->Netowrk */ |
| 197 | PCO_P_PCSCF_IPv4_ADDR = 0x000c, |
| 198 | PCO_P_DNS_IPv4_ADDR = 0x000d, |
| 199 | PCO_P_MSISDN = 0x000e, |
| 200 | PCO_P_IFOM_SUPPORT = 0x000f, |
| 201 | PCO_P_IPv4_LINK_MTU = 0x0010, |
| 202 | PCO_P_MS_SUPP_LOC_A_TFT = 0x0011, |
| 203 | PCO_P_PCSCF_RESEL_SUP = 0x0012, /* only MS->Network */ |
| 204 | PCO_P_NBIFOM_REQ = 0x0013, |
| 205 | PCO_P_NBIFOM_MODE = 0x0014, |
| 206 | PCO_P_NONIP_LINK_MTU = 0x0015, |
| 207 | PCO_P_APN_RATE_CTRL_SUP = 0x0016, |
| 208 | PCO_P_PS_DATA_OFF_UE = 0x0017, |
| 209 | PCO_P_REL_DATA_SVC = 0x0018, |
| 210 | }; |
| 211 | |
| 212 | /* determine if PCO contains given protocol */ |
| 213 | static bool pco_contains_proto(struct ul255_t *pco, uint16_t prot) |
| 214 | { |
| 215 | uint8_t *cur = pco->v + 1; |
| 216 | |
| 217 | /* iterate over PCO and check if protocol contained */ |
| 218 | while (cur + 2 < pco->v + pco->l) { |
| 219 | uint16_t cur_prot = osmo_load16be(cur); |
| 220 | uint8_t cur_len = cur[2]; |
| 221 | if (cur_prot == prot) |
| 222 | return true; |
| 223 | if (cur_len == 0) |
| 224 | break; |
| 225 | cur += cur_len; |
| 226 | } |
| 227 | return false; |
| 228 | } |
| 229 | |
| 230 | /* determine if PDP context has IPv6 support */ |
| 231 | static bool pdp_has_v4(struct pdp_t *pdp) |
| 232 | { |
| 233 | if (pdp->eua.l == 4+2) |
| 234 | return true; |
| 235 | else |
| 236 | return false; |
| 237 | } |
| 238 | |
| 239 | /* process one PCO request from a MS/UE, putting together the proper responses */ |
| 240 | static void process_pco(struct pdp_t *pdp) |
| 241 | { |
| 242 | struct msgb *msg = msgb_alloc(256, "PCO"); |
| 243 | msgb_put_u8(msg, 0x80); /* ext-bit + configuration protocol byte */ |
| 244 | |
| 245 | /* FIXME: also check if primary / secondary DNS was requested */ |
| 246 | if (pdp_has_v4(pdp) && pco_contains_proto(&pdp->pco_req, PCO_P_IPCP)) { |
| 247 | /* FIXME: properly implement this for IPCP */ |
| 248 | uint8_t *cur = msgb_put(msg, pco.l-1); |
| 249 | memcpy(cur, pco.v+1, pco.l-1); |
| 250 | } |
| 251 | |
| 252 | if (pco_contains_proto(&pdp->pco_req, PCO_P_DNS_IPv6_ADDR)) { |
| 253 | if (dns1.len == 16) |
| 254 | msgb_t16lv_put(msg, PCO_P_DNS_IPv6_ADDR, dns1.len, dns1.v6.s6_addr); |
| 255 | if (dns2.len == 16) |
| 256 | msgb_t16lv_put(msg, PCO_P_DNS_IPv6_ADDR, dns2.len, dns2.v6.s6_addr); |
| 257 | } |
| 258 | |
| 259 | if (pco_contains_proto(&pdp->pco_req, PCO_P_DNS_IPv4_ADDR)) { |
| 260 | if (dns1.len == 4) |
| 261 | msgb_t16lv_put(msg, PCO_P_DNS_IPv4_ADDR, dns1.len, (uint8_t *)&dns1.v4); |
| 262 | if (dns2.len == 4) |
| 263 | msgb_t16lv_put(msg, PCO_P_DNS_IPv4_ADDR, dns2.len, (uint8_t *)&dns2.v4); |
| 264 | } |
| 265 | |
| 266 | if (msgb_length(msg) > 1) { |
| 267 | memcpy(pdp->pco_neg.v, msgb_data(msg), msgb_length(msg)); |
| 268 | pdp->pco_neg.l = msgb_length(msg); |
| 269 | } else |
| 270 | pdp->pco_neg.l = 0; |
| 271 | |
| 272 | msgb_free(msg); |
| 273 | } |
| 274 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 275 | int create_context_ind(struct pdp_t *pdp) |
| 276 | { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 277 | struct in46_addr addr; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 278 | struct ippoolm_t *member; |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 279 | int rc; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 280 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 281 | DEBUGP(DGGSN, "Received create PDP context request\n"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 282 | |
Harald Welte | d9d8862 | 2017-08-04 00:22:35 +0200 | [diff] [blame] | 283 | /* FIXME: we manually force all context requests to dynamic here! */ |
| 284 | if (pdp->eua.l > 2) |
| 285 | pdp->eua.l = 2; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 286 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 287 | memcpy(pdp->qos_neg0, pdp->qos_req0, sizeof(pdp->qos_req0)); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 288 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 289 | memcpy(pdp->qos_neg.v, pdp->qos_req.v, pdp->qos_req.l); /* TODO */ |
| 290 | pdp->qos_neg.l = pdp->qos_req.l; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 291 | |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 292 | if (in46a_from_eua(&pdp->eua, &addr)) { |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 293 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Cannot decode EUA from MS/SGSN: %s", |
| 294 | osmo_hexdump(pdp->eua.v, pdp->eua.l)); |
| 295 | gtp_create_context_resp(gsn, pdp, GTPCAUSE_UNKNOWN_PDP); |
| 296 | return 0; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 297 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 298 | |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 299 | rc = ippool_newip(ippool, &member, &addr, 0); |
| 300 | if (rc < 0) { |
| 301 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Cannot allocate IP address in pool\n"); |
| 302 | gtp_create_context_resp(gsn, pdp, -rc); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 303 | return 0; /* Allready in use, or no more available */ |
| 304 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 305 | |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame] | 306 | if (addr.len == sizeof(struct in6_addr)) { |
| 307 | struct in46_addr tmp; |
| 308 | /* IPv6 doesn't really send the real/allocated address at this point, but just |
| 309 | * the link-identifier which the MS shall use for router solicitation */ |
| 310 | tmp.len = addr.len; |
| 311 | /* initialize upper 64 bits to prefix, they are discarded by MS anyway */ |
| 312 | memcpy(tmp.v6.s6_addr, &member->addr.v6, 8); |
| 313 | /* use allocated 64bit prefix as lower 64bit, used as link id by MS */ |
| 314 | memcpy(tmp.v6.s6_addr+8, &member->addr.v6, 8); |
| 315 | in46a_to_eua(&tmp, &pdp->eua); |
| 316 | } else |
| 317 | in46a_to_eua(&member->addr, &pdp->eua); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 318 | pdp->peer = member; |
| 319 | pdp->ipif = tun; /* TODO */ |
| 320 | member->peer = pdp; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 321 | |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame] | 322 | /* 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] | 323 | if (gtp_kernel_tunnel_add(pdp) < 0) { |
Andreas Schultz | c5fbf9b | 2015-11-17 12:22:43 +0100 | [diff] [blame] | 324 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 325 | "Cannot add tunnel to kernel: %s\n", strerror(errno)); |
Harald Welte | d1bf1e1 | 2017-08-03 00:00:23 +0200 | [diff] [blame] | 326 | gtp_create_context_resp(gsn, pdp, GTPCAUSE_SYS_FAIL); |
| 327 | return 0; |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 328 | } |
Max | 3142d8d | 2017-05-04 17:45:10 +0200 | [diff] [blame] | 329 | |
| 330 | if (!send_trap(gsn, pdp, member, "imsi-ass-ip")) { /* TRAP with IP assignment */ |
Max | 727417d | 2016-08-02 17:10:38 +0200 | [diff] [blame] | 331 | gtp_create_context_resp(gsn, pdp, GTPCAUSE_NO_RESOURCES); |
| 332 | return 0; |
| 333 | } |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 334 | |
Harald Welte | 1ae9877 | 2017-08-09 20:28:52 +0200 | [diff] [blame] | 335 | process_pco(pdp); |
| 336 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 337 | gtp_create_context_resp(gsn, pdp, GTPCAUSE_ACC_REQ); |
| 338 | return 0; /* Success */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 339 | } |
| 340 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 341 | /* Callback for receiving messages from tun */ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 342 | int cb_tun_ind(struct tun_t *tun, void *pack, unsigned len) |
| 343 | { |
| 344 | struct ippoolm_t *ipm; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 345 | struct in46_addr dst; |
Harald Welte | 63ebccd | 2017-08-02 21:10:09 +0200 | [diff] [blame] | 346 | struct iphdr *iph = (struct iphdr *)pack; |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 347 | struct ip6_hdr *ip6h = (struct ip6_hdr *)pack; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 348 | |
Harald Welte | 63ebccd | 2017-08-02 21:10:09 +0200 | [diff] [blame] | 349 | if (iph->version == 4) { |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 350 | if (len < sizeof(*iph) || len < 4*iph->ihl) |
| 351 | return -1; |
| 352 | dst.len = 4; |
Harald Welte | 63ebccd | 2017-08-02 21:10:09 +0200 | [diff] [blame] | 353 | dst.v4.s_addr = iph->daddr; |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 354 | } else if (iph->version == 6) { |
Harald Welte | d4d6e09 | 2017-08-08 18:10:43 +0200 | [diff] [blame] | 355 | /* Due to the fact that 3GPP requires an allocation of a |
| 356 | * /64 prefix to each MS, we must instruct |
| 357 | * ippool_getip() below to match only the leading /64 |
| 358 | * prefix, i.e. the first 8 bytes of the address */ |
| 359 | dst.len = 8; |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 360 | dst.v6 = ip6h->ip6_dst; |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 361 | } else { |
Harald Welte | a0d281d | 2017-08-02 21:48:16 +0200 | [diff] [blame] | 362 | LOGP(DGGSN, LOGL_NOTICE, "non-IPv packet received from tun\n"); |
Harald Welte | d12eab9 | 2017-08-02 19:49:47 +0200 | [diff] [blame] | 363 | return -1; |
| 364 | } |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 365 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 366 | DEBUGP(DGGSN, "Received packet from tun!\n"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 367 | |
| 368 | if (ippool_getip(ippool, &ipm, &dst)) { |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 369 | DEBUGP(DGGSN, "Received packet with no destination!!!\n"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 370 | return 0; |
| 371 | } |
| 372 | |
| 373 | if (ipm->peer) /* Check if a peer protocol is defined */ |
| 374 | gtp_data_req(gsn, (struct pdp_t *)ipm->peer, pack, len); |
| 375 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 376 | } |
| 377 | |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame] | 378 | /* RFC3307 link-local scope multicast address */ |
| 379 | static const struct in6_addr all_router_mcast_addr = { |
| 380 | .s6_addr = { 0xff,0x02,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,2 } |
| 381 | }; |
| 382 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 383 | int encaps_tun(struct pdp_t *pdp, void *pack, unsigned len) |
| 384 | { |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame] | 385 | struct iphdr *iph = (struct iphdr *)pack; |
| 386 | struct ip6_hdr *ip6h = (struct ip6_hdr *)pack; |
| 387 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 388 | DEBUGP(DGGSN, "encaps_tun. Packet received: forwarding to tun\n"); |
Harald Welte | d46bcd2 | 2017-08-08 23:27:22 +0200 | [diff] [blame] | 389 | |
| 390 | switch (iph->version) { |
| 391 | case 6: |
| 392 | /* daddr: all-routers multicast addr */ |
| 393 | if (IN6_ARE_ADDR_EQUAL(&ip6h->ip6_dst, &all_router_mcast_addr)) |
| 394 | return handle_router_mcast(gsn, pdp, pack, len); |
| 395 | break; |
| 396 | case 4: |
| 397 | break; |
| 398 | default: |
| 399 | LOGP(DGGSN, LOGL_ERROR, "Packet from MS is neither IPv4 nor IPv6\n"); |
| 400 | return -1; |
| 401 | } |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 402 | return tun_encaps((struct tun_t *)pdp->ipif, pack, len); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 403 | } |
| 404 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 405 | int main(int argc, char **argv) |
| 406 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 407 | /* gengeopt declarations */ |
| 408 | struct gengetopt_args_info args_info; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 409 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 410 | struct hostent *host; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 411 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 412 | /* Handle keyboard interrupt SIGINT */ |
| 413 | struct sigaction s; |
| 414 | s.sa_handler = (void *)signal_handler; |
| 415 | if ((0 != sigemptyset(&s.sa_mask)) && debug) |
| 416 | printf("sigemptyset failed.\n"); |
| 417 | s.sa_flags = SA_RESETHAND; |
| 418 | if ((sigaction(SIGINT, &s, NULL) != 0) && debug) |
| 419 | printf("Could not register SIGINT signal handler.\n"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 420 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 421 | fd_set fds; /* For select() */ |
| 422 | struct timeval idleTime; /* How long to select() */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 423 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 424 | int timelimit; /* Number of seconds to be connected */ |
| 425 | int starttime; /* Time program was started */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 426 | |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 427 | osmo_init_logging(&log_info); |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 428 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 429 | if (cmdline_parser(argc, argv, &args_info) != 0) |
| 430 | exit(1); |
| 431 | if (args_info.debug_flag) { |
| 432 | printf("listen: %s\n", args_info.listen_arg); |
| 433 | if (args_info.conf_arg) |
| 434 | printf("conf: %s\n", args_info.conf_arg); |
| 435 | printf("fg: %d\n", args_info.fg_flag); |
| 436 | printf("debug: %d\n", args_info.debug_flag); |
| 437 | printf("qos: %#08x\n", args_info.qos_arg); |
| 438 | if (args_info.apn_arg) |
| 439 | printf("apn: %s\n", args_info.apn_arg); |
| 440 | if (args_info.net_arg) |
| 441 | printf("net: %s\n", args_info.net_arg); |
| 442 | if (args_info.dynip_arg) |
| 443 | printf("dynip: %s\n", args_info.dynip_arg); |
| 444 | if (args_info.statip_arg) |
| 445 | printf("statip: %s\n", args_info.statip_arg); |
| 446 | if (args_info.ipup_arg) |
| 447 | printf("ipup: %s\n", args_info.ipup_arg); |
| 448 | if (args_info.ipdown_arg) |
| 449 | printf("ipdown: %s\n", args_info.ipdown_arg); |
| 450 | if (args_info.pidfile_arg) |
| 451 | printf("pidfile: %s\n", args_info.pidfile_arg); |
| 452 | if (args_info.statedir_arg) |
| 453 | printf("statedir: %s\n", args_info.statedir_arg); |
Pablo Neira Ayuso | d9d7be3 | 2016-05-10 18:43:12 +0200 | [diff] [blame] | 454 | if (args_info.gtp_linux_flag) |
| 455 | printf("gtp_linux: %d\n", args_info.gtp_linux_flag); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 456 | printf("timelimit: %d\n", args_info.timelimit_arg); |
| 457 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 458 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 459 | /* Try out our new parser */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 460 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 461 | if (cmdline_parser_configfile(args_info.conf_arg, &args_info, 0, 0, 0) |
| 462 | != 0) |
| 463 | exit(1); |
Holger Hans Peter Freyther | 9c0ff4f | 2014-03-23 10:07:26 +0100 | [diff] [blame] | 464 | |
| 465 | /* Open a log file */ |
| 466 | if (args_info.logfile_arg) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 467 | struct log_target *tgt; |
Holger Hans Peter Freyther | c38bf64 | 2014-12-04 18:54:58 +0100 | [diff] [blame] | 468 | int lvl; |
| 469 | |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 470 | tgt = log_target_find(LOG_TGT_TYPE_FILE, args_info.logfile_arg); |
| 471 | if (!tgt) { |
| 472 | tgt = log_target_create_file(args_info.logfile_arg); |
| 473 | if (!tgt) { |
| 474 | LOGP(DGGSN, LOGL_ERROR, |
| 475 | "Failed to create logfile: %s\n", |
| 476 | args_info.logfile_arg); |
| 477 | exit(1); |
| 478 | } |
| 479 | log_add_target(tgt); |
Holger Hans Peter Freyther | 9c0ff4f | 2014-03-23 10:07:26 +0100 | [diff] [blame] | 480 | } |
Holger Hans Peter Freyther | c38bf64 | 2014-12-04 18:54:58 +0100 | [diff] [blame] | 481 | log_set_all_filter(tgt, 1); |
| 482 | log_set_use_color(tgt, 0); |
| 483 | |
| 484 | if (args_info.loglevel_arg) { |
| 485 | lvl = log_parse_level(args_info.loglevel_arg); |
| 486 | log_set_log_level(tgt, lvl); |
| 487 | LOGP(DGGSN, LOGL_NOTICE, |
| 488 | "Set file log level to %s\n", |
| 489 | log_level_str(lvl)); |
| 490 | } |
Holger Hans Peter Freyther | 9c0ff4f | 2014-03-23 10:07:26 +0100 | [diff] [blame] | 491 | } |
| 492 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 493 | if (args_info.debug_flag) { |
| 494 | printf("cmdline_parser_configfile\n"); |
| 495 | printf("listen: %s\n", args_info.listen_arg); |
| 496 | printf("conf: %s\n", args_info.conf_arg); |
| 497 | printf("fg: %d\n", args_info.fg_flag); |
| 498 | printf("debug: %d\n", args_info.debug_flag); |
| 499 | printf("qos: %#08x\n", args_info.qos_arg); |
| 500 | if (args_info.apn_arg) |
| 501 | printf("apn: %s\n", args_info.apn_arg); |
| 502 | if (args_info.net_arg) |
| 503 | printf("net: %s\n", args_info.net_arg); |
| 504 | if (args_info.dynip_arg) |
| 505 | printf("dynip: %s\n", args_info.dynip_arg); |
| 506 | if (args_info.statip_arg) |
| 507 | printf("statip: %s\n", args_info.statip_arg); |
| 508 | if (args_info.ipup_arg) |
| 509 | printf("ipup: %s\n", args_info.ipup_arg); |
| 510 | if (args_info.ipdown_arg) |
| 511 | printf("ipdown: %s\n", args_info.ipdown_arg); |
| 512 | if (args_info.pidfile_arg) |
| 513 | printf("pidfile: %s\n", args_info.pidfile_arg); |
| 514 | if (args_info.statedir_arg) |
| 515 | printf("statedir: %s\n", args_info.statedir_arg); |
Pablo Neira Ayuso | d9d7be3 | 2016-05-10 18:43:12 +0200 | [diff] [blame] | 516 | if (args_info.gtp_linux_flag) |
| 517 | printf("gtp-linux: %d\n", args_info.gtp_linux_flag); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 518 | printf("timelimit: %d\n", args_info.timelimit_arg); |
| 519 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 520 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 521 | /* Handle each option */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 522 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 523 | /* debug */ |
| 524 | debug = args_info.debug_flag; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 525 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 526 | /* listen */ |
| 527 | /* Do hostname lookup to translate hostname to IP address */ |
| 528 | /* Any port listening is not possible as a valid address is */ |
| 529 | /* required for create_pdp_context_response messages */ |
| 530 | if (args_info.listen_arg) { |
| 531 | if (!(host = gethostbyname(args_info.listen_arg))) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 532 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 533 | "Invalid listening address: %s!", |
| 534 | args_info.listen_arg); |
| 535 | exit(1); |
| 536 | } else { |
| 537 | memcpy(&listen_.s_addr, host->h_addr, host->h_length); |
| 538 | } |
| 539 | } else { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 540 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 541 | "Listening address must be specified! " |
| 542 | "Please use command line option --listen or " |
| 543 | "edit %s configuration file\n", args_info.conf_arg); |
| 544 | exit(1); |
| 545 | } |
jjako | 88c2216 | 2003-07-06 19:33:18 +0000 | [diff] [blame] | 546 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 547 | /* net */ |
| 548 | /* Store net as in_addr net and mask */ |
| 549 | if (args_info.net_arg) { |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 550 | if (ippool_aton(&net, &prefixlen, args_info.net_arg, 0)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 551 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 552 | "Invalid network address: %s!", |
| 553 | args_info.net_arg); |
| 554 | exit(1); |
| 555 | } |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 556 | /* default for network + destination address = net + 1 */ |
| 557 | netaddr = net; |
| 558 | in46a_inc(&netaddr); |
| 559 | destaddr = netaddr; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 560 | } else { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 561 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 562 | "Network address must be specified: %s!", |
| 563 | args_info.net_arg); |
| 564 | exit(1); |
| 565 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 566 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 567 | /* dynip */ |
| 568 | if (!args_info.dynip_arg) { |
| 569 | if (ippool_new(&ippool, args_info.net_arg, NULL, 1, 0, |
| 570 | IPPOOL_NONETWORK | IPPOOL_NOGATEWAY | |
| 571 | IPPOOL_NOBROADCAST)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 572 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 573 | "Failed to allocate IP pool!"); |
| 574 | exit(1); |
| 575 | } |
| 576 | } else { |
| 577 | if (ippool_new(&ippool, args_info.dynip_arg, NULL, 1, 0, |
| 578 | IPPOOL_NONETWORK | IPPOOL_NOGATEWAY | |
| 579 | IPPOOL_NOBROADCAST)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 580 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 581 | "Failed to allocate IP pool!"); |
| 582 | exit(1); |
| 583 | } |
| 584 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 585 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 586 | /* DNS1 and DNS2 */ |
Harald Welte | 1ae9877 | 2017-08-09 20:28:52 +0200 | [diff] [blame] | 587 | memset(&dns1, 0, sizeof(dns1)); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 588 | if (args_info.pcodns1_arg) { |
Harald Welte | 1ae9877 | 2017-08-09 20:28:52 +0200 | [diff] [blame] | 589 | size_t tmp; |
| 590 | if (ippool_aton(&dns1, &tmp, args_info.pcodns1_arg, 0) != 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 591 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 592 | "Failed to convert pcodns1!"); |
| 593 | exit(1); |
| 594 | } |
| 595 | } |
Harald Welte | 1ae9877 | 2017-08-09 20:28:52 +0200 | [diff] [blame] | 596 | memset(&dns2, 0, sizeof(dns2)); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 597 | if (args_info.pcodns2_arg) { |
Harald Welte | 1ae9877 | 2017-08-09 20:28:52 +0200 | [diff] [blame] | 598 | size_t tmp; |
| 599 | if (ippool_aton(&dns2, &tmp, args_info.pcodns2_arg, 0) != 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 600 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 601 | "Failed to convert pcodns2!"); |
| 602 | exit(1); |
| 603 | } |
| 604 | } |
jjako | 1d3db97 | 2004-01-16 09:56:56 +0000 | [diff] [blame] | 605 | |
Harald Welte | 1ae9877 | 2017-08-09 20:28:52 +0200 | [diff] [blame] | 606 | unsigned int cur = 0; |
| 607 | pco.v[cur++] = 0x80; /* x0000yyy x=1, yyy=000: PPP */ |
| 608 | pco.v[cur++] = 0x80; /* IPCP */ |
| 609 | pco.v[cur++] = 0x21; |
| 610 | pco.v[cur++] = 0xFF; /* Length of contents */ |
| 611 | pco.v[cur++] = 0x02; /* ACK */ |
| 612 | pco.v[cur++] = 0x00; /* ID: Need to match request */ |
| 613 | pco.v[cur++] = 0x00; /* Length */ |
| 614 | pco.v[cur++] = 0xFF; /* overwritten */ |
| 615 | if (dns1.len == 4) { |
| 616 | pco.v[cur++] = 0x81; /* DNS 1 */ |
| 617 | pco.v[cur++] = 2 + dns1.len; |
| 618 | if (dns1.len == 4) |
| 619 | memcpy(&pco.v[cur], &dns1.v4, dns1.len); |
| 620 | else |
| 621 | memcpy(&pco.v[cur], &dns1.v6, dns1.len); |
| 622 | cur += dns1.len; |
| 623 | } |
| 624 | if (dns2.len == 4) { |
| 625 | pco.v[cur++] = 0x83; |
| 626 | pco.v[cur++] = 2 + dns2.len; /* DNS 2 */ |
| 627 | if (dns2.len == 4) |
| 628 | memcpy(&pco.v[cur], &dns2.v4, dns2.len); |
| 629 | else |
| 630 | memcpy(&pco.v[cur], &dns2.v6, dns2.len); |
| 631 | cur += dns2.len; |
| 632 | } |
| 633 | pco.l = cur; |
| 634 | /* patch in length values */ |
| 635 | pco.v[3] = pco.l - 4; |
| 636 | pco.v[7] = pco.l - 4; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 637 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 638 | /* ipup */ |
| 639 | ipup = args_info.ipup_arg; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 640 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 641 | /* ipdown */ |
| 642 | ipdown = args_info.ipdown_arg; |
jjako | 4b26b51 | 2003-01-28 16:13:57 +0000 | [diff] [blame] | 643 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 644 | /* Timelimit */ |
| 645 | timelimit = args_info.timelimit_arg; |
| 646 | starttime = time(NULL); |
jjako | 4b26b51 | 2003-01-28 16:13:57 +0000 | [diff] [blame] | 647 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 648 | /* qos */ |
| 649 | qos.l = 3; |
| 650 | qos.v[2] = (args_info.qos_arg) & 0xff; |
| 651 | qos.v[1] = ((args_info.qos_arg) >> 8) & 0xff; |
| 652 | qos.v[0] = ((args_info.qos_arg) >> 16) & 0xff; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 653 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 654 | /* apn */ |
| 655 | if (strlen(args_info.apn_arg) > (sizeof(apn.v) - 1)) { |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 656 | LOGP(DGGSN, LOGL_ERROR, "Invalid APN\n"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 657 | return -1; |
| 658 | } |
| 659 | apn.l = strlen(args_info.apn_arg) + 1; |
| 660 | apn.v[0] = (char)strlen(args_info.apn_arg); |
| 661 | strncpy((char *)&apn.v[1], args_info.apn_arg, sizeof(apn.v) - 1); |
jjako | e014978 | 2003-07-06 17:07:04 +0000 | [diff] [blame] | 662 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 663 | /* foreground */ |
| 664 | /* If flag not given run as a daemon */ |
| 665 | if (!args_info.fg_flag) { |
| 666 | FILE *f; |
| 667 | int rc; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 668 | /* Close the standard file descriptors. */ |
| 669 | /* Is this really needed ? */ |
| 670 | f = freopen("/dev/null", "w", stdout); |
| 671 | if (f == NULL) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 672 | SYS_ERR(DGGSN, LOGL_NOTICE, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 673 | "Could not redirect stdout to /dev/null"); |
| 674 | } |
| 675 | f = freopen("/dev/null", "w", stderr); |
| 676 | if (f == NULL) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 677 | SYS_ERR(DGGSN, LOGL_NOTICE, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 678 | "Could not redirect stderr to /dev/null"); |
| 679 | } |
| 680 | f = freopen("/dev/null", "r", stdin); |
| 681 | if (f == NULL) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 682 | SYS_ERR(DGGSN, LOGL_NOTICE, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 683 | "Could not redirect stdin to /dev/null"); |
| 684 | } |
| 685 | rc = daemon(0, 0); |
| 686 | if (rc != 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 687 | SYS_ERR(DGGSN, LOGL_ERROR, rc, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 688 | "Could not daemonize"); |
| 689 | exit(1); |
| 690 | } |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 691 | } |
jjako | e014978 | 2003-07-06 17:07:04 +0000 | [diff] [blame] | 692 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 693 | /* pidfile */ |
| 694 | /* This has to be done after we have our final pid */ |
| 695 | if (args_info.pidfile_arg) { |
| 696 | log_pid(args_info.pidfile_arg); |
| 697 | } |
jjako | e014978 | 2003-07-06 17:07:04 +0000 | [diff] [blame] | 698 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 699 | DEBUGP(DGGSN, "gtpclient: Initialising GTP tunnel\n"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 700 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 701 | 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] | 702 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Failed to create gtp"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 703 | exit(1); |
| 704 | } |
| 705 | if (gsn->fd0 > maxfd) |
| 706 | maxfd = gsn->fd0; |
| 707 | if (gsn->fd1c > maxfd) |
| 708 | maxfd = gsn->fd1c; |
| 709 | if (gsn->fd1u > maxfd) |
| 710 | maxfd = gsn->fd1u; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 711 | |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 712 | /* use GTP kernel module for data packet encapsulation */ |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 713 | if (gtp_kernel_init(gsn, &net.v4, prefixlen, &args_info) < 0) |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 714 | goto err; |
| 715 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 716 | gtp_set_cb_data_ind(gsn, encaps_tun); |
| 717 | gtp_set_cb_delete_context(gsn, delete_context); |
| 718 | gtp_set_cb_create_context_ind(gsn, create_context_ind); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 719 | |
Max | 727417d | 2016-08-02 17:10:38 +0200 | [diff] [blame] | 720 | gsn->ctrl = ctrl_interface_setup(NULL, OSMO_CTRL_PORT_GGSN, NULL); |
| 721 | if (!gsn->ctrl) { |
| 722 | LOGP(DGGSN, LOGL_ERROR, "Failed to create CTRL interface.\n"); |
| 723 | exit(1); |
| 724 | } |
| 725 | |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 726 | /* skip the configuration of the tun0 if we're using the gtp0 device */ |
| 727 | if (gtp_kernel_enabled()) |
| 728 | goto skip_tun; |
| 729 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 730 | /* Create a tunnel interface */ |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 731 | DEBUGP(DGGSN, "Creating tun interface\n"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 732 | if (tun_new((struct tun_t **)&tun)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 733 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Failed to create tun"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 734 | exit(1); |
| 735 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 736 | |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 737 | DEBUGP(DGGSN, "Setting tun IP address\n"); |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 738 | if (tun_setaddr(tun, &netaddr, &destaddr, prefixlen)) { |
Holger Hans Peter Freyther | 6ab58b4 | 2014-12-04 19:29:57 +0100 | [diff] [blame] | 739 | SYS_ERR(DGGSN, LOGL_ERROR, 0, "Failed to set tun IP address"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 740 | exit(1); |
| 741 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 742 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 743 | tun_set_cb_ind(tun, cb_tun_ind); |
| 744 | if (tun->fd > maxfd) |
| 745 | maxfd = tun->fd; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 746 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 747 | if (ipup) |
| 748 | tun_runscript(tun, ipup); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 749 | |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 750 | skip_tun: |
| 751 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 752 | /******************************************************************/ |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 753 | /* Main select loop */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 754 | /******************************************************************/ |
| 755 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 756 | while ((((starttime + timelimit) > time(NULL)) || (0 == timelimit)) |
| 757 | && (!end)) { |
Harald Welte | c3dcba0 | 2010-05-04 11:02:54 +0200 | [diff] [blame] | 758 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 759 | FD_ZERO(&fds); |
| 760 | if (tun) |
| 761 | FD_SET(tun->fd, &fds); |
| 762 | FD_SET(gsn->fd0, &fds); |
| 763 | FD_SET(gsn->fd1c, &fds); |
| 764 | FD_SET(gsn->fd1u, &fds); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 765 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 766 | gtp_retranstimeout(gsn, &idleTime); |
| 767 | switch (select(maxfd + 1, &fds, NULL, NULL, &idleTime)) { |
| 768 | case -1: /* errno == EINTR : unblocked signal */ |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 769 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 770 | "select() returned -1"); |
| 771 | /* On error, select returns without modifying fds */ |
| 772 | FD_ZERO(&fds); |
| 773 | break; |
| 774 | case 0: |
| 775 | /* printf("Select returned 0\n"); */ |
| 776 | gtp_retrans(gsn); /* Only retransmit if nothing else */ |
| 777 | break; |
| 778 | default: |
| 779 | break; |
| 780 | } |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 781 | |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 782 | if (tun && tun->fd != -1 && FD_ISSET(tun->fd, &fds) && |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 783 | tun_decaps(tun) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 784 | SYS_ERR(DGGSN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 785 | "TUN read failed (fd)=(%d)", tun->fd); |
| 786 | } |
| 787 | |
| 788 | if (FD_ISSET(gsn->fd0, &fds)) |
| 789 | gtp_decaps0(gsn); |
| 790 | |
| 791 | if (FD_ISSET(gsn->fd1c, &fds)) |
| 792 | gtp_decaps1c(gsn); |
| 793 | |
| 794 | if (FD_ISSET(gsn->fd1u, &fds)) |
| 795 | gtp_decaps1u(gsn); |
| 796 | |
Max | 727417d | 2016-08-02 17:10:38 +0200 | [diff] [blame] | 797 | osmo_select_main(1); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 798 | } |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 799 | err: |
| 800 | gtp_kernel_stop(); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 801 | cmdline_parser_free(&args_info); |
| 802 | ippool_free(ippool); |
| 803 | gtp_free(gsn); |
Pablo Neira Ayuso | 4b075b6 | 2015-11-17 12:22:42 +0100 | [diff] [blame] | 804 | if (tun) |
| 805 | tun_free(tun); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 806 | |
| 807 | return 1; |
| 808 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 809 | } |