#include "asterisk.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netdb.h>
#include <net/if.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <sys/ioctl.h>
#include <ifaddrs.h>
#include "asterisk/acl.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/options.h"
#include "asterisk/utils.h"
#include "asterisk/lock.h"
#include "asterisk/srv.h"
Go to the source code of this file.
Data Structures | |
struct | dscp_codepoint |
struct | my_ifreq |
Defines | |
#define | IPTOS_LOWCOST 0x02 |
#define | IPTOS_MINCOST IPTOS_LOWCOST |
Functions | |
ast_ha * | ast_append_ha (char *sense, const char *stuff, struct ast_ha *path) |
int | ast_apply_ha (struct ast_ha *ha, struct sockaddr_in *sin) |
void | ast_copy_ha (const struct ast_ha *from, struct ast_ha *to) |
static struct ast_ha * | ast_duplicate_ha (struct ast_ha *original) |
ast_ha * | ast_duplicate_ha_list (struct ast_ha *original) |
int | ast_find_ourip (struct in_addr *ourip, struct sockaddr_in bindaddr) |
void | ast_free_ha (struct ast_ha *ha) |
int | ast_get_ip (struct sockaddr_in *sin, const char *value) |
int | ast_get_ip_or_srv (struct sockaddr_in *sin, const char *value, const char *service) |
int | ast_lookup_iface (char *iface, struct in_addr *address) |
int | ast_ouraddrfor (struct in_addr *them, struct in_addr *us) |
int | ast_str2tos (const char *value, unsigned int *tos) |
const char * | ast_tos2str (unsigned int tos) |
static int | get_local_address (struct in_addr *ourip) |
static void | score_address (const struct sockaddr_in *sin, struct in_addr *best_addr, int *best_score) |
Variables | |
static struct in_addr | __ourip = { .s_addr = 0x00000000, } |
static struct dscp_codepoint | dscp_pool1 [] |
Definition in file acl.c.
#define IPTOS_MINCOST IPTOS_LOWCOST |
Definition at line 64 of file acl.c.
Referenced by ast_str2tos(), ast_tos2str(), reload_config(), and set_config().
Definition at line 298 of file acl.c.
References ast_copy_string(), ast_log(), ast_malloc, AST_SENSE_ALLOW, AST_SENSE_DENY, free, LOG_DEBUG, LOG_WARNING, ast_ha::netaddr, ast_ha::next, and option_debug.
Referenced by add_calltoken_ignore(), authenticate(), build_callno_limits(), build_device(), build_gateway(), build_peer(), and build_user().
00299 { 00300 struct ast_ha *ha; 00301 char *nm = "255.255.255.255"; 00302 char tmp[256]; 00303 struct ast_ha *prev = NULL; 00304 struct ast_ha *ret; 00305 int x, z; 00306 unsigned int y; 00307 00308 ret = path; 00309 while (path) { 00310 prev = path; 00311 path = path->next; 00312 } 00313 if ((ha = ast_malloc(sizeof(*ha)))) { 00314 ast_copy_string(tmp, stuff, sizeof(tmp)); 00315 nm = strchr(tmp, '/'); 00316 if (!nm) { 00317 nm = "255.255.255.255"; 00318 } else { 00319 *nm = '\0'; 00320 nm++; 00321 } 00322 if (!strchr(nm, '.')) { 00323 if ((sscanf(nm, "%30d", &x) == 1) && (x >= 0) && (x <= 32)) { 00324 y = 0; 00325 for (z = 0; z < x; z++) { 00326 y >>= 1; 00327 y |= 0x80000000; 00328 } 00329 ha->netmask.s_addr = htonl(y); 00330 } 00331 } else if (!inet_aton(nm, &ha->netmask)) { 00332 ast_log(LOG_WARNING, "%s is not a valid netmask\n", nm); 00333 free(ha); 00334 return ret; 00335 } 00336 if (!inet_aton(tmp, &ha->netaddr)) { 00337 ast_log(LOG_WARNING, "%s is not a valid IP\n", tmp); 00338 free(ha); 00339 return ret; 00340 } 00341 ha->netaddr.s_addr &= ha->netmask.s_addr; 00342 if (!strncasecmp(sense, "p", 1)) { 00343 ha->sense = AST_SENSE_ALLOW; 00344 } else { 00345 ha->sense = AST_SENSE_DENY; 00346 } 00347 ha->next = NULL; 00348 if (prev) { 00349 prev->next = ha; 00350 } else { 00351 ret = ha; 00352 } 00353 } 00354 if (option_debug) 00355 ast_log(LOG_DEBUG, "%s/%s appended to acl for peer\n", stuff, nm); 00356 return ret; 00357 }
int ast_apply_ha | ( | struct ast_ha * | ha, | |
struct sockaddr_in * | sin | |||
) |
Definition at line 359 of file acl.c.
References ast_copy_string(), ast_inet_ntoa(), ast_log(), AST_SENSE_ALLOW, LOG_DEBUG, ast_ha::netaddr, ast_ha::netmask, ast_ha::next, option_debug, and ast_ha::sense.
Referenced by ast_sip_ouraddrfor(), authenticate(), check_access(), check_user_full(), parse_register_contact(), register_verify(), and skinny_register().
00360 { 00361 /* Start optimistic */ 00362 int res = AST_SENSE_ALLOW; 00363 while (ha) { 00364 char iabuf[INET_ADDRSTRLEN]; 00365 char iabuf2[INET_ADDRSTRLEN]; 00366 /* DEBUG */ 00367 ast_copy_string(iabuf, ast_inet_ntoa(sin->sin_addr), sizeof(iabuf)); 00368 ast_copy_string(iabuf2, ast_inet_ntoa(ha->netaddr), sizeof(iabuf2)); 00369 if (option_debug) 00370 ast_log(LOG_DEBUG, "##### Testing %s with %s\n", iabuf, iabuf2); 00371 /* For each rule, if this address and the netmask = the net address 00372 apply the current rule */ 00373 if ((sin->sin_addr.s_addr & ha->netmask.s_addr) == ha->netaddr.s_addr) 00374 res = ha->sense; 00375 ha = ha->next; 00376 } 00377 return res; 00378 }
Definition at line 256 of file acl.c.
References ast_ha::netaddr, ast_ha::netmask, and ast_ha::sense.
Referenced by add_calltoken_ignore(), ast_duplicate_ha(), and build_callno_limits().
00257 { 00258 memcpy(&to->netaddr, &from->netaddr, sizeof(from->netaddr)); 00259 memcpy(&to->netmask, &from->netmask, sizeof(from->netmask)); 00260 to->sense = from->sense; 00261 }
Definition at line 264 of file acl.c.
References ast_copy_ha(), and ast_malloc.
Referenced by ast_duplicate_ha_list().
00265 { 00266 struct ast_ha *new_ha; 00267 00268 if ((new_ha = ast_malloc(sizeof(*new_ha)))) { 00269 /* Copy from original to new object */ 00270 ast_copy_ha(original, new_ha); 00271 } 00272 00273 return new_ha; 00274 }
Definition at line 278 of file acl.c.
References ast_duplicate_ha(), and ast_ha::next.
00279 { 00280 struct ast_ha *start = original; 00281 struct ast_ha *ret = NULL; 00282 struct ast_ha *link, *prev = NULL; 00283 00284 while (start) { 00285 link = ast_duplicate_ha(start); /* Create copy of this object */ 00286 if (prev) 00287 prev->next = link; /* Link previous to this object */ 00288 00289 if (!ret) 00290 ret = link; /* Save starting point */ 00291 00292 start = start->next; /* Go to next object */ 00293 prev = link; /* Save pointer to this object */ 00294 } 00295 return ret; /* Return start of list */ 00296 }
int ast_find_ourip | ( | struct in_addr * | ourip, | |
struct sockaddr_in | bindaddr | |||
) |
Definition at line 555 of file acl.c.
References ahp, ast_gethostbyname(), ast_log(), ast_ouraddrfor(), get_local_address(), hp, LOG_WARNING, and ourhost.
Referenced by __oh323_rtp_create(), gtalk_create_candidates(), and load_module().
00556 { 00557 char ourhost[MAXHOSTNAMELEN] = ""; 00558 struct ast_hostent ahp; 00559 struct hostent *hp; 00560 struct in_addr saddr; 00561 00562 /* just use the bind address if it is nonzero */ 00563 if (ntohl(bindaddr.sin_addr.s_addr)) { 00564 memcpy(ourip, &bindaddr.sin_addr, sizeof(*ourip)); 00565 return 0; 00566 } 00567 /* try to use our hostname */ 00568 if (gethostname(ourhost, sizeof(ourhost) - 1)) { 00569 ast_log(LOG_WARNING, "Unable to get hostname\n"); 00570 } else { 00571 hp = ast_gethostbyname(ourhost, &ahp); 00572 if (hp) { 00573 memcpy(ourip, hp->h_addr, sizeof(*ourip)); 00574 return 0; 00575 } 00576 } 00577 /* A.ROOT-SERVERS.NET. */ 00578 if (inet_aton("198.41.0.4", &saddr) && !ast_ouraddrfor(&saddr, ourip)) 00579 return 0; 00580 return get_local_address(ourip); 00581 }
void ast_free_ha | ( | struct ast_ha * | ha | ) |
Definition at line 245 of file acl.c.
References free, and ast_ha::next.
Referenced by add_calltoken_ignore(), authenticate(), build_callno_limits(), build_peer(), build_user(), destroy_gateway(), oh323_destroy_peer(), oh323_destroy_user(), peer_destructor(), reload_config(), sip_destroy_peer(), sip_destroy_user(), unload_module(), and user_destructor().
00246 { 00247 struct ast_ha *hal; 00248 while (ha) { 00249 hal = ha; 00250 ha = ha->next; 00251 free(hal); 00252 } 00253 }
int ast_get_ip | ( | struct sockaddr_in * | sin, | |
const char * | value | |||
) |
Definition at line 497 of file acl.c.
References ast_get_ip_or_srv().
Referenced by build_device(), build_gateway(), build_peer(), build_user(), and peer_set_srcaddr().
00498 { 00499 return ast_get_ip_or_srv(sin, value, NULL); 00500 }
int ast_get_ip_or_srv | ( | struct sockaddr_in * | sin, | |
const char * | value, | |||
const char * | service | |||
) |
Definition at line 380 of file acl.c.
References ahp, ast_get_srv(), ast_gethostbyname(), ast_log(), hp, and LOG_WARNING.
Referenced by ast_get_ip(), and build_peer().
00381 { 00382 struct hostent *hp; 00383 struct ast_hostent ahp; 00384 char srv[256]; 00385 char host[256]; 00386 int tportno = ntohs(sin->sin_port); 00387 if (inet_aton(value, &sin->sin_addr)) 00388 return 0; 00389 if (service) { 00390 snprintf(srv, sizeof(srv), "%s.%s", service, value); 00391 if (ast_get_srv(NULL, host, sizeof(host), &tportno, srv) > 0) { 00392 sin->sin_port = htons(tportno); 00393 value = host; 00394 } 00395 } 00396 hp = ast_gethostbyname(value, &ahp); 00397 if (hp) { 00398 memcpy(&sin->sin_addr, hp->h_addr, sizeof(sin->sin_addr)); 00399 } else { 00400 ast_log(LOG_WARNING, "Unable to lookup '%s'\n", value); 00401 return -1; 00402 } 00403 return 0; 00404 }
int ast_lookup_iface | ( | char * | iface, | |
struct in_addr * | address | |||
) |
Definition at line 503 of file acl.c.
References ast_copy_string(), ast_log(), errno, and LOG_WARNING.
00504 { 00505 int mysock, res = 0; 00506 struct my_ifreq ifreq; 00507 00508 memset(&ifreq, 0, sizeof(ifreq)); 00509 ast_copy_string(ifreq.ifrn_name, iface, sizeof(ifreq.ifrn_name)); 00510 00511 mysock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); 00512 res = ioctl(mysock, SIOCGIFADDR, &ifreq); 00513 00514 close(mysock); 00515 if (res < 0) { 00516 ast_log(LOG_WARNING, "Unable to get IP of %s: %s\n", iface, strerror(errno)); 00517 memcpy((char *)address, (char *)&__ourip, sizeof(__ourip)); 00518 return -1; 00519 } else { 00520 memcpy((char *)address, (char *)&ifreq.ifru_addr.sin_addr, sizeof(ifreq.ifru_addr.sin_addr)); 00521 return 0; 00522 } 00523 }
int ast_ouraddrfor | ( | struct in_addr * | them, | |
struct in_addr * | us | |||
) |
Definition at line 525 of file acl.c.
References ast_log(), LOG_WARNING, and s.
Referenced by ast_find_ourip(), ast_sip_ouraddrfor(), build_device(), build_gateway(), and find_subchannel_and_lock().
00526 { 00527 int s; 00528 struct sockaddr_in sin; 00529 socklen_t slen; 00530 00531 s = socket(PF_INET, SOCK_DGRAM, 0); 00532 if (s < 0) { 00533 ast_log(LOG_WARNING, "Cannot create socket\n"); 00534 return -1; 00535 } 00536 sin.sin_family = AF_INET; 00537 sin.sin_port = 5060; 00538 sin.sin_addr = *them; 00539 if (connect(s, (struct sockaddr *)&sin, sizeof(sin))) { 00540 ast_log(LOG_WARNING, "Cannot connect\n"); 00541 close(s); 00542 return -1; 00543 } 00544 slen = sizeof(sin); 00545 if (getsockname(s, (struct sockaddr *)&sin, &slen)) { 00546 ast_log(LOG_WARNING, "Cannot get socket name\n"); 00547 close(s); 00548 return -1; 00549 } 00550 close(s); 00551 *us = sin.sin_addr; 00552 return 0; 00553 }
int ast_str2tos | ( | const char * | value, | |
unsigned int * | tos | |||
) |
Definition at line 437 of file acl.c.
References ast_log(), dscp_pool1, IPTOS_MINCOST, LOG_WARNING, name, and dscp_codepoint::space.
Referenced by iax_template_parse(), and set_config().
00438 { 00439 int fval; 00440 unsigned int x; 00441 00442 if (sscanf(value, "%30i", &fval) == 1) { 00443 *tos = fval & 0xFF; 00444 return 0; 00445 } 00446 00447 for (x = 0; x < sizeof(dscp_pool1) / sizeof(dscp_pool1[0]); x++) { 00448 if (!strcasecmp(value, dscp_pool1[x].name)) { 00449 *tos = dscp_pool1[x].space << 2; 00450 return 0; 00451 } 00452 } 00453 00454 if (!strcasecmp(value, "lowdelay")) 00455 *tos = IPTOS_LOWDELAY; 00456 else if (!strcasecmp(value, "throughput")) 00457 *tos = IPTOS_THROUGHPUT; 00458 else if (!strcasecmp(value, "reliability")) 00459 *tos = IPTOS_RELIABILITY; 00460 else if (!strcasecmp(value, "mincost")) 00461 *tos = IPTOS_MINCOST; 00462 else if (!strcasecmp(value, "none")) 00463 *tos = 0; 00464 else 00465 return -1; 00466 00467 ast_log(LOG_WARNING, "TOS value %s is deprecated. Please see doc/ip-tos.txt for more information.\n", value); 00468 00469 return 0; 00470 }
const char* ast_tos2str | ( | unsigned int | tos | ) |
Definition at line 472 of file acl.c.
References dscp_pool1, IPTOS_MINCOST, name, and dscp_codepoint::space.
Referenced by sip_show_settings().
00473 { 00474 unsigned int x; 00475 00476 switch (tos) { 00477 case 0: 00478 return "none"; 00479 case IPTOS_LOWDELAY: 00480 return "lowdelay"; 00481 case IPTOS_THROUGHPUT: 00482 return "throughput"; 00483 case IPTOS_RELIABILITY: 00484 return "reliability"; 00485 case IPTOS_MINCOST: 00486 return "mincost"; 00487 default: 00488 for (x = 0; x < sizeof(dscp_pool1) / sizeof(dscp_pool1[0]); x++) { 00489 if (dscp_pool1[x].space == (tos >> 2)) 00490 return dscp_pool1[x].name; 00491 } 00492 } 00493 00494 return "unknown"; 00495 }
static int get_local_address | ( | struct in_addr * | ourip | ) | [static] |
Definition at line 146 of file acl.c.
References free, malloc, s, and score_address().
Referenced by ast_find_ourip().
00147 { 00148 int s, res = -1; 00149 #ifdef SOLARIS 00150 struct lifreq *ifr = NULL; 00151 struct lifnum ifn; 00152 struct lifconf ifc; 00153 struct sockaddr_in *sa; 00154 char *buf = NULL; 00155 int bufsz, x; 00156 #endif /* SOLARIS */ 00157 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) 00158 struct ifaddrs *ifap, *ifaphead; 00159 int rtnerr; 00160 const struct sockaddr_in *sin; 00161 #endif /* BSD_OR_LINUX */ 00162 struct in_addr best_addr; 00163 int best_score = -100; 00164 memset(&best_addr, 0, sizeof(best_addr)); 00165 00166 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) 00167 rtnerr = getifaddrs(&ifaphead); 00168 if (rtnerr) { 00169 perror(NULL); 00170 return -1; 00171 } 00172 #endif /* BSD_OR_LINUX */ 00173 00174 s = socket(AF_INET, SOCK_STREAM, 0); 00175 00176 if (s > 0) { 00177 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) 00178 for (ifap = ifaphead; ifap; ifap = ifap->ifa_next) { 00179 00180 if (ifap->ifa_addr && ifap->ifa_addr->sa_family == AF_INET) { 00181 sin = (const struct sockaddr_in *) ifap->ifa_addr; 00182 score_address(sin, &best_addr, &best_score); 00183 res = 0; 00184 00185 if (best_score == 0) 00186 break; 00187 } 00188 } 00189 #endif /* BSD_OR_LINUX */ 00190 00191 /* There is no reason whatsoever that this shouldn't work on Linux or BSD also. */ 00192 #ifdef SOLARIS 00193 /* Get a count of interfaces on the machine */ 00194 ifn.lifn_family = AF_INET; 00195 ifn.lifn_flags = 0; 00196 ifn.lifn_count = 0; 00197 if (ioctl(s, SIOCGLIFNUM, &ifn) < 0) { 00198 close(s); 00199 return -1; 00200 } 00201 00202 bufsz = ifn.lifn_count * sizeof(struct lifreq); 00203 if (!(buf = malloc(bufsz))) { 00204 close(s); 00205 return -1; 00206 } 00207 memset(buf, 0, bufsz); 00208 00209 /* Get a list of interfaces on the machine */ 00210 ifc.lifc_len = bufsz; 00211 ifc.lifc_buf = buf; 00212 ifc.lifc_family = AF_INET; 00213 ifc.lifc_flags = 0; 00214 if (ioctl(s, SIOCGLIFCONF, &ifc) < 0) { 00215 close(s); 00216 free(buf); 00217 return -1; 00218 } 00219 00220 for (ifr = ifc.lifc_req, x = 0; x < ifn.lifn_count; ifr++, x++) { 00221 sa = (struct sockaddr_in *)&(ifr->lifr_addr); 00222 score_address(sa, &best_addr, &best_score); 00223 res = 0; 00224 00225 if (best_score == 0) 00226 break; 00227 } 00228 00229 free(buf); 00230 #endif /* SOLARIS */ 00231 00232 close(s); 00233 } 00234 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) 00235 freeifaddrs(ifaphead); 00236 #endif /* BSD_OR_LINUX */ 00237 00238 if (res == 0 && ourip) 00239 memcpy(ourip, &best_addr, sizeof(*ourip)); 00240 return res; 00241 }
static void score_address | ( | const struct sockaddr_in * | sin, | |
struct in_addr * | best_addr, | |||
int * | best_score | |||
) | [static] |
Definition at line 89 of file acl.c.
References ast_inet_ntoa().
Referenced by get_local_address().
00090 { 00091 const char *address; 00092 int score; 00093 00094 address = ast_inet_ntoa(sin->sin_addr); 00095 00096 /* RFC 1700 alias for the local network */ 00097 if (address[0] == '0') 00098 score = -25; 00099 /* RFC 1700 localnet */ 00100 else if (strncmp(address, "127", 3) == 0) 00101 score = -20; 00102 /* RFC 1918 non-public address space */ 00103 else if (strncmp(address, "10.", 3) == 0) 00104 score = -5; 00105 /* RFC 1918 non-public address space */ 00106 else if (strncmp(address, "172", 3) == 0) { 00107 /* 172.16.0.0 - 172.19.255.255, but not 172.160.0.0 - 172.169.255.255 */ 00108 if (address[4] == '1' && address[5] >= '6' && address[6] == '.') 00109 score = -5; 00110 /* 172.20.0.0 - 172.29.255.255, but not 172.200.0.0 - 172.255.255.255 nor 172.2.0.0 - 172.2.255.255 */ 00111 else if (address[4] == '2' && address[6] == '.') 00112 score = -5; 00113 /* 172.30.0.0 - 172.31.255.255 */ 00114 else if (address[4] == '3' && address[5] <= '1') 00115 score = -5; 00116 /* All other 172 addresses are public */ 00117 else 00118 score = 0; 00119 /* RFC 2544 Benchmark test range */ 00120 } else if (strncmp(address, "198.1", 5) == 0 && address[5] >= '8' && address[6] == '.') 00121 score = -10; 00122 /* RFC 1918 non-public address space */ 00123 else if (strncmp(address, "192.168", 7) == 0) 00124 score = -5; 00125 /* RFC 3330 Zeroconf network */ 00126 else if (strncmp(address, "169.254", 7) == 0) 00127 /*!\note Better score than a test network, but not quite as good as RFC 1918 00128 * address space. The reason is that some Linux distributions automatically 00129 * configure a Zeroconf address before trying DHCP, so we want to prefer a 00130 * DHCP lease to a Zeroconf address. 00131 */ 00132 score = -10; 00133 /* RFC 3330 Test network */ 00134 else if (strncmp(address, "192.0.2.", 8) == 0) 00135 score = -15; 00136 /* Every other address should be publically routable */ 00137 else 00138 score = 0; 00139 00140 if (score > *best_score) { 00141 *best_score = score; 00142 memcpy(best_addr, &sin->sin_addr, sizeof(*best_addr)); 00143 } 00144 }
struct in_addr __ourip = { .s_addr = 0x00000000, } [static] |
Definition at line 76 of file acl.c.
Referenced by build_device(), build_gateway(), find_subchannel_and_lock(), gtalk_create_candidates(), load_module(), reload_config(), sip_alloc(), sip_notify(), sip_poke_peer(), sip_request_call(), sip_send_mwi_to_peer(), skinny_register(), transmit_register(), and transmit_response_using_temp().
struct dscp_codepoint dscp_pool1[] [static] |