#include "asterisk.h"
#include "asterisk/network.h"
#include <ifaddrs.h>
#include "asterisk/acl.h"
#include "asterisk/channel.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 |
Defines | |
#define | V6_WORD(sin6, index) ((uint32_t *)&((sin6)->sin6_addr))[(index)] |
Isolate a 32-bit section of an IPv6 address. | |
Functions | |
static int | apply_netmask (const struct ast_sockaddr *addr, const struct ast_sockaddr *netmask, struct ast_sockaddr *result) |
Apply a netmask to an address and store the result in a separate structure. | |
ast_ha * | ast_append_ha (const char *sense, const char *stuff, struct ast_ha *path, int *error) |
Add a new rule to a list of HAs. | |
int | ast_apply_ha (const struct ast_ha *ha, const struct ast_sockaddr *addr) |
Apply a set of rules to a given IP address. | |
void | ast_copy_ha (const struct ast_ha *from, struct ast_ha *to) |
Copy the contents of one HA to another. | |
static struct ast_ha * | ast_duplicate_ha (struct ast_ha *original) |
ast_ha * | ast_duplicate_ha_list (struct ast_ha *original) |
Duplicate the contents of a list of host access rules. | |
int | ast_find_ourip (struct ast_sockaddr *ourip, const struct ast_sockaddr *bindaddr, int family) |
Find our IP address. | |
void | ast_free_ha (struct ast_ha *ha) |
Free a list of HAs. | |
int | ast_get_ip (struct ast_sockaddr *addr, const char *value) |
Get the IP address given a hostname. | |
int | ast_get_ip_or_srv (struct ast_sockaddr *addr, const char *value, const char *service) |
Get the IP address given a hostname and optional service. | |
int | ast_ouraddrfor (const struct ast_sockaddr *them, struct ast_sockaddr *us) |
Get our local IP address when contacting a remote host. | |
int | ast_str2cos (const char *value, unsigned int *cos) |
Convert a string to the appropriate COS value. | |
int | ast_str2tos (const char *value, unsigned int *tos) |
Convert a string to the appropriate TOS value. | |
const char * | ast_tos2str (unsigned int tos) |
Convert a TOS value into its string representation. | |
static int | get_local_address (struct ast_sockaddr *ourip) |
static int | parse_cidr_mask (struct ast_sockaddr *addr, int is_v4, const char *mask_str) |
Parse a netmask in CIDR notation. | |
static int | resolve_first (struct ast_sockaddr *addr, const char *name, int flag, int family) |
static void | score_address (const struct sockaddr_in *sin, struct in_addr *best_addr, int *best_score) |
Variables | |
static struct dscp_codepoint | dscp_pool1 [] |
Definition in file acl.c.
#define V6_WORD | ( | sin6, | |||
index | ) | ((uint32_t *)&((sin6)->sin6_addr))[(index)] |
Isolate a 32-bit section of an IPv6 address.
An IPv6 address can be divided into 4 32-bit chunks. This gives easy access to one of these chunks.
sin6 | A pointer to a struct sockaddr_in6 | |
index | Which 32-bit chunk to operate on. Must be in the range 0-3. |
Definition at line 284 of file acl.c.
Referenced by apply_netmask(), and parse_cidr_mask().
static int apply_netmask | ( | const struct ast_sockaddr * | addr, | |
const struct ast_sockaddr * | netmask, | |||
struct ast_sockaddr * | result | |||
) | [static] |
Apply a netmask to an address and store the result in a separate structure.
When dealing with IPv6 addresses, one cannot apply a netmask with a simple logical and operation. Furthermore, the incoming address may be an IPv4 address and need to be mapped properly before attempting to apply a rule.
addr | The IP address to apply the mask to. | |
netmask | The netmask configured in the host access rule. | |
result | The resultant address after applying the netmask to the given address |
0 | Successfully applied netmask -1 Failed to apply netmask |
Definition at line 300 of file acl.c.
References ast_ha::addr, ast_sockaddr_from_sin, ast_sockaddr_is_ipv4(), ast_sockaddr_is_ipv6(), ast_sockaddr::len, ast_sockaddr::ss, and V6_WORD.
Referenced by ast_append_ha(), and ast_apply_ha().
00302 { 00303 int res = 0; 00304 00305 if (ast_sockaddr_is_ipv4(addr)) { 00306 struct sockaddr_in result4 = { 0, }; 00307 struct sockaddr_in *addr4 = (struct sockaddr_in *) &addr->ss; 00308 struct sockaddr_in *mask4 = (struct sockaddr_in *) &netmask->ss; 00309 result4.sin_family = AF_INET; 00310 result4.sin_addr.s_addr = addr4->sin_addr.s_addr & mask4->sin_addr.s_addr; 00311 ast_sockaddr_from_sin(result, &result4); 00312 } else if (ast_sockaddr_is_ipv6(addr)) { 00313 struct sockaddr_in6 result6 = { 0, }; 00314 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) &addr->ss; 00315 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *) &netmask->ss; 00316 int i; 00317 result6.sin6_family = AF_INET6; 00318 for (i = 0; i < 4; ++i) { 00319 V6_WORD(&result6, i) = V6_WORD(addr6, i) & V6_WORD(mask6, i); 00320 } 00321 memcpy(&result->ss, &result6, sizeof(result6)); 00322 result->len = sizeof(result6); 00323 } else { 00324 /* Unsupported address scheme */ 00325 res = -1; 00326 } 00327 00328 return res; 00329 }
struct ast_ha* ast_append_ha | ( | const char * | sense, | |
const char * | stuff, | |||
struct ast_ha * | path, | |||
int * | error | |||
) |
Add a new rule to a list of HAs.
This adds the new host access rule to the end of the list whose head is specified by the path parameter. Rules are evaluated in a way such that if multiple rules apply to a single IP address/subnet mask, then the rule latest in the list will be used.
sense | Either "permit" or "deny" (Actually any 'p' word will result in permission, and any other word will result in denial) | |
stuff | The IP address and subnet mask, separated with a '/'. The subnet mask can either be in dotted-decimal format or in CIDR notation (i.e. 0-32). | |
path | The head of the HA list to which we wish to append our new rule. If NULL is passed, then the new rule will become the head of the list | |
[out] | error | The integer error points to will be set non-zero if an error occurs |
Definition at line 395 of file acl.c.
References ast_ha::addr, apply_netmask(), ast_calloc, ast_debug, ast_free_ha(), ast_log(), AST_SENSE_ALLOW, AST_SENSE_DENY, ast_sockaddr_ipv4_mapped(), ast_sockaddr_is_ipv4(), ast_sockaddr_parse(), ast_sockaddr_stringify(), ast_strdupa, LOG_NOTICE, LOG_WARNING, ast_ha::next, parse_cidr_mask(), PARSE_PORT_FORBID, ast_ha::sense, and strsep().
Referenced by add_calltoken_ignore(), build_callno_limits(), build_device(), build_peer(), build_user(), and config_parse_variables().
00396 { 00397 struct ast_ha *ha; 00398 struct ast_ha *prev = NULL; 00399 struct ast_ha *ret; 00400 char *tmp = ast_strdupa(stuff); 00401 char *address = NULL, *mask = NULL; 00402 int addr_is_v4; 00403 00404 ret = path; 00405 while (path) { 00406 prev = path; 00407 path = path->next; 00408 } 00409 00410 if (!(ha = ast_calloc(1, sizeof(*ha)))) { 00411 return ret; 00412 } 00413 00414 address = strsep(&tmp, "/"); 00415 if (!address) { 00416 address = tmp; 00417 } else { 00418 mask = tmp; 00419 } 00420 00421 if (!ast_sockaddr_parse(&ha->addr, address, PARSE_PORT_FORBID)) { 00422 ast_log(LOG_WARNING, "Invalid IP address: %s\n", address); 00423 ast_free_ha(ha); 00424 *error = 1; 00425 return ret; 00426 } 00427 00428 /* If someone specifies an IPv4-mapped IPv6 address, 00429 * we just convert this to an IPv4 ACL 00430 */ 00431 if (ast_sockaddr_ipv4_mapped(&ha->addr, &ha->addr)) { 00432 ast_log(LOG_NOTICE, "IPv4-mapped ACL network address specified. " 00433 "Converting to an IPv4 ACL network address.\n"); 00434 } 00435 00436 addr_is_v4 = ast_sockaddr_is_ipv4(&ha->addr); 00437 00438 if (!mask) { 00439 parse_cidr_mask(&ha->netmask, addr_is_v4, addr_is_v4 ? "32" : "128"); 00440 } else if (strchr(mask, ':') || strchr(mask, '.')) { 00441 int mask_is_v4; 00442 /* Mask is of x.x.x.x or x:x:x:x:x:x:x:x variety */ 00443 if (!ast_sockaddr_parse(&ha->netmask, mask, PARSE_PORT_FORBID)) { 00444 ast_log(LOG_WARNING, "Invalid netmask: %s\n", mask); 00445 ast_free_ha(ha); 00446 *error = 1; 00447 return ret; 00448 } 00449 /* If someone specifies an IPv4-mapped IPv6 netmask, 00450 * we just convert this to an IPv4 ACL 00451 */ 00452 if (ast_sockaddr_ipv4_mapped(&ha->netmask, &ha->netmask)) { 00453 ast_log(LOG_NOTICE, "IPv4-mapped ACL netmask specified. " 00454 "Converting to an IPv4 ACL netmask.\n"); 00455 } 00456 mask_is_v4 = ast_sockaddr_is_ipv4(&ha->netmask); 00457 if (addr_is_v4 ^ mask_is_v4) { 00458 ast_log(LOG_WARNING, "Address and mask are not using same address scheme.\n"); 00459 ast_free_ha(ha); 00460 *error = 1; 00461 return ret; 00462 } 00463 } else if (parse_cidr_mask(&ha->netmask, addr_is_v4, mask)) { 00464 ast_log(LOG_WARNING, "Invalid CIDR netmask: %s\n", mask); 00465 ast_free_ha(ha); 00466 *error = 1; 00467 return ret; 00468 } 00469 00470 if (apply_netmask(&ha->addr, &ha->netmask, &ha->addr)) { 00471 /* This shouldn't happen because ast_sockaddr_parse would 00472 * have failed much earlier on an unsupported address scheme 00473 */ 00474 char *failmask = ast_strdupa(ast_sockaddr_stringify(&ha->netmask)); 00475 char *failaddr = ast_strdupa(ast_sockaddr_stringify(&ha->addr)); 00476 ast_log(LOG_WARNING, "Unable to apply netmask %s to address %s\n", failmask, failaddr); 00477 ast_free_ha(ha); 00478 *error = 1; 00479 return ret; 00480 } 00481 00482 ha->sense = strncasecmp(sense, "p", 1) ? AST_SENSE_DENY : AST_SENSE_ALLOW; 00483 00484 ha->next = NULL; 00485 if (prev) { 00486 prev->next = ha; 00487 } else { 00488 ret = ha; 00489 } 00490 00491 { 00492 const char *addr = ast_strdupa(ast_sockaddr_stringify(&ha->addr)); 00493 const char *mask = ast_strdupa(ast_sockaddr_stringify(&ha->netmask)); 00494 00495 ast_debug(1, "%s/%s sense %d appended to acl for peer\n", addr, mask, ha->sense); 00496 } 00497 00498 return ret; 00499 }
int ast_apply_ha | ( | const struct ast_ha * | ha, | |
const struct ast_sockaddr * | addr | |||
) |
Apply a set of rules to a given IP address.
The list of host access rules is traversed, beginning with the input rule. If the IP address given matches a rule, the "sense" of that rule is used as the return value. Note that if an IP address matches multiple rules that the last one matched will be the one whose sense will be returned.
ha | The head of the list of host access rules to follow | |
addr | An ast_sockaddr whose address is considered when matching rules |
AST_SENSE_ALLOW | The IP address passes our ACL | |
AST_SENSE_DENY | The IP address fails our ACL |
Definition at line 501 of file acl.c.
References ast_ha::addr, apply_netmask(), ast_copy_string(), ast_debug, ast_inet_ntoa(), AST_SENSE_ALLOW, ast_sockaddr_cmp_addr(), ast_sockaddr_ipv4_mapped(), ast_sockaddr_is_ipv4(), ast_sockaddr_is_ipv4_mapped(), ast_sockaddr_is_ipv6(), ast_ha::netmask, ast_ha::next, and ast_ha::sense.
Referenced by apply_directmedia_ha(), ast_sip_ouraddrfor(), authenticate(), check_access(), check_peer_ok(), parse_register_contact(), register_verify(), and skinny_register().
00502 { 00503 /* Start optimistic */ 00504 int res = AST_SENSE_ALLOW; 00505 const struct ast_ha *current_ha; 00506 00507 for (current_ha = ha; current_ha; current_ha = current_ha->next) { 00508 struct ast_sockaddr result; 00509 struct ast_sockaddr mapped_addr; 00510 const struct ast_sockaddr *addr_to_use; 00511 #if 0 /* debugging code */ 00512 char iabuf[INET_ADDRSTRLEN]; 00513 char iabuf2[INET_ADDRSTRLEN]; 00514 /* DEBUG */ 00515 ast_copy_string(iabuf, ast_inet_ntoa(sin->sin_addr), sizeof(iabuf)); 00516 ast_copy_string(iabuf2, ast_inet_ntoa(ha->netaddr), sizeof(iabuf2)); 00517 ast_debug(1, "##### Testing %s with %s\n", iabuf, iabuf2); 00518 #endif 00519 if (ast_sockaddr_is_ipv4(&ha->addr)) { 00520 if (ast_sockaddr_is_ipv6(addr)) { 00521 if (ast_sockaddr_is_ipv4_mapped(addr)) { 00522 /* IPv4 ACLs apply to IPv4-mapped addresses */ 00523 ast_sockaddr_ipv4_mapped(addr, &mapped_addr); 00524 addr_to_use = &mapped_addr; 00525 } else { 00526 /* An IPv4 ACL does not apply to an IPv6 address */ 00527 continue; 00528 } 00529 } else { 00530 /* Address is IPv4 and ACL is IPv4. No biggie */ 00531 addr_to_use = addr; 00532 } 00533 } else { 00534 if (ast_sockaddr_is_ipv6(addr) && !ast_sockaddr_is_ipv4_mapped(addr)) { 00535 addr_to_use = addr; 00536 } else { 00537 /* Address is IPv4 or IPv4 mapped but ACL is IPv6. Skip */ 00538 continue; 00539 } 00540 } 00541 00542 /* For each rule, if this address and the netmask = the net address 00543 apply the current rule */ 00544 if (apply_netmask(addr_to_use, ¤t_ha->netmask, &result)) { 00545 /* Unlikely to happen since we know the address to be IPv4 or IPv6 */ 00546 continue; 00547 } 00548 if (!ast_sockaddr_cmp_addr(&result, ¤t_ha->addr)) { 00549 res = current_ha->sense; 00550 } 00551 } 00552 return res; 00553 }
Copy the contents of one HA to another.
This copies the internals of the 'from' HA to the 'to' HA. It is important that the 'to' HA has been allocated prior to calling this function
from | Source HA to copy | |
to | Destination HA to copy to |
void |
Definition at line 230 of file acl.c.
References ast_ha::addr, ast_sockaddr_copy(), ast_ha::netmask, and ast_ha::sense.
Referenced by add_calltoken_ignore(), ast_duplicate_ha(), and build_callno_limits().
00231 { 00232 ast_sockaddr_copy(&to->addr, &from->addr); 00233 ast_sockaddr_copy(&to->netmask, &from->netmask); 00234 to->sense = from->sense; 00235 }
Definition at line 238 of file acl.c.
References ast_calloc, and ast_copy_ha().
Referenced by ast_duplicate_ha_list().
00239 { 00240 struct ast_ha *new_ha; 00241 00242 if ((new_ha = ast_calloc(1, sizeof(*new_ha)))) { 00243 /* Copy from original to new object */ 00244 ast_copy_ha(original, new_ha); 00245 } 00246 00247 return new_ha; 00248 }
Duplicate the contents of a list of host access rules.
A deep copy of all ast_has in the list is made. The returned value is allocated on the heap and must be freed independently of the input parameter when finished.
original | The ast_ha to copy |
The | head of the list of duplicated ast_has |
Definition at line 252 of file acl.c.
References ast_duplicate_ha(), and ast_ha::next.
Referenced by create_addr_from_peer().
00253 { 00254 struct ast_ha *start = original; 00255 struct ast_ha *ret = NULL; 00256 struct ast_ha *current, *prev = NULL; 00257 00258 while (start) { 00259 current = ast_duplicate_ha(start); /* Create copy of this object */ 00260 if (prev) { 00261 prev->next = current; /* Link previous to this object */ 00262 } 00263 00264 if (!ret) { 00265 ret = current; /* Save starting point */ 00266 } 00267 00268 start = start->next; /* Go to next object */ 00269 prev = current; /* Save pointer to this object */ 00270 } 00271 return ret; /* Return start of list */ 00272 }
int ast_find_ourip | ( | struct ast_sockaddr * | ourip, | |
const struct ast_sockaddr * | bindaddr, | |||
int | family | |||
) |
Find our IP address.
This function goes through many iterations in an attempt to find our IP address. If any step along the way should fail, we move to the next item in the list. Here are the steps taken:
[out] | ourip | Our IP address is written here when it is found |
bindaddr | A hint used for finding our IP. See the steps above for more details | |
family | Only addresses of the given family will be returned. Use 0 or AST_SOCKADDR_UNSPEC to get addresses of all families. |
0 | Success | |
-1 | Failure |
Definition at line 723 of file acl.c.
References ast_debug, ast_log(), ast_ouraddrfor(), ast_sockaddr_copy(), ast_sockaddr_is_any(), bindaddr, get_local_address(), LOG_WARNING, MAXHOSTNAMELEN, ourhost, PARSE_PORT_FORBID, and resolve_first().
Referenced by __oh323_rtp_create(), gtalk_get_local_ip(), jingle_create_candidates(), and load_module().
00724 { 00725 char ourhost[MAXHOSTNAMELEN] = ""; 00726 struct ast_sockaddr root; 00727 00728 /* just use the bind address if it is nonzero */ 00729 if (!ast_sockaddr_is_any(bindaddr)) { 00730 ast_sockaddr_copy(ourip, bindaddr); 00731 ast_debug(3, "Attached to given IP address\n"); 00732 return 0; 00733 } 00734 /* try to use our hostname */ 00735 if (gethostname(ourhost, sizeof(ourhost) - 1)) { 00736 ast_log(LOG_WARNING, "Unable to get hostname\n"); 00737 } else { 00738 if (resolve_first(ourip, ourhost, PARSE_PORT_FORBID, family) == 0) { 00739 return 0; 00740 } 00741 } 00742 ast_debug(3, "Trying to check A.ROOT-SERVERS.NET and get our IP address for that connection\n"); 00743 /* A.ROOT-SERVERS.NET. */ 00744 if (!resolve_first(&root, "A.ROOT-SERVERS.NET", PARSE_PORT_FORBID, 0) && 00745 !ast_ouraddrfor(&root, ourip)) { 00746 return 0; 00747 } 00748 return get_local_address(ourip); 00749 }
void ast_free_ha | ( | struct ast_ha * | ha | ) |
Free a list of HAs.
Given the head of a list of HAs, it and all appended HAs are freed
ha | The head of the list of HAs to free |
void |
Definition at line 219 of file acl.c.
References ast_free, and ast_ha::next.
Referenced by __sip_destroy(), add_calltoken_ignore(), ast_append_ha(), build_callno_limits(), build_peer(), build_user(), destroy_gateway(), oh323_destroy_peer(), oh323_destroy_user(), peer_destructor(), reload_config(), sip_destroy_peer(), unload_module(), and user_destructor().
00220 { 00221 struct ast_ha *hal; 00222 while (ha) { 00223 hal = ha; 00224 ha = ha->next; 00225 ast_free(hal); 00226 } 00227 }
int ast_get_ip | ( | struct ast_sockaddr * | addr, | |
const char * | value | |||
) |
Get the IP address given a hostname.
Similar in nature to ast_gethostbyname, except that instead of getting an entire hostent structure, you instead are given only the IP address inserted into a sockaddr_in structure.
[out] | addr | The IP address is written into sin->sin_addr |
value | The hostname to look up |
0 | Success | |
-1 | Failure |
Definition at line 679 of file acl.c.
References ast_get_ip_or_srv().
Referenced by build_peer(), build_user(), config_parse_variables(), and peer_set_srcaddr().
00680 { 00681 return ast_get_ip_or_srv(addr, value, NULL); 00682 }
int ast_get_ip_or_srv | ( | struct ast_sockaddr * | addr, | |
const char * | value, | |||
const char * | service | |||
) |
Get the IP address given a hostname and optional service.
If the service parameter is non-NULL, then an SRV lookup will be made by prepending the service to the value parameter, separated by a '.' For example, if value is "example.com" and service is "_sip._udp" then an SRV lookup will be done for "_sip._udp.example.com". If service is NULL, then this function acts exactly like a call to ast_get_ip.
addr | The IP address found. The address family is used as an input parameter to filter the returned adresses. if it is 0, both IPv4 and IPv6 addresses can be returned. | |
value | The hostname to look up | |
service | A specific service provided by the host. A NULL service results in an A-record lookup instead of an SRV lookup |
0 | Success | |
-1 | Failure |
Definition at line 576 of file acl.c.
References ast_get_srv(), ast_sockaddr_set_port, PARSE_PORT_FORBID, resolve_first(), and ast_sockaddr::ss.
Referenced by ast_dnsmgr_lookup(), ast_get_ip(), create_addr(), dnsmgr_refresh(), and proxy_update().
00577 { 00578 char srv[256]; 00579 char host[256]; 00580 int srv_ret = 0; 00581 int tportno; 00582 00583 if (service) { 00584 snprintf(srv, sizeof(srv), "%s.%s", service, value); 00585 if ((srv_ret = ast_get_srv(NULL, host, sizeof(host), &tportno, srv)) > 0) { 00586 value = host; 00587 } 00588 } 00589 00590 if (resolve_first(addr, value, PARSE_PORT_FORBID, addr->ss.ss_family) != 0) { 00591 return -1; 00592 } 00593 00594 if (srv_ret > 0) { 00595 ast_sockaddr_set_port(addr, tportno); 00596 } 00597 00598 return 0; 00599 }
int ast_ouraddrfor | ( | const struct ast_sockaddr * | them, | |
struct ast_sockaddr * | us | |||
) |
Get our local IP address when contacting a remote host.
This function will attempt to connect(2) to them over UDP using a source port of 5060. If the connect(2) call is successful, then we inspect the sockaddr_in output parameter of connect(2) to determine the IP address used to connect to them. This IP address is then copied into us.
them | The IP address to which we wish to attempt to connect | |
[out] | us | The source IP address used to connect to them |
-1 | Failure | |
0 | Success |
Definition at line 684 of file acl.c.
References ast_connect(), ast_debug, ast_getsockname(), ast_log(), ast_sockaddr_is_ipv6(), ast_sockaddr_port, ast_sockaddr_set_port, ast_sockaddr_stringify_addr(), ast_strdupa, LOG_ERROR, and LOG_WARNING.
Referenced by ast_find_ourip(), ast_sip_ouraddrfor(), find_subchannel_and_lock(), and gtalk_get_local_ip().
00685 { 00686 int port; 00687 int s; 00688 00689 port = ast_sockaddr_port(us); 00690 00691 if ((s = socket(ast_sockaddr_is_ipv6(them) ? AF_INET6 : AF_INET, 00692 SOCK_DGRAM, 0)) < 0) { 00693 ast_log(LOG_ERROR, "Cannot create socket\n"); 00694 return -1; 00695 } 00696 00697 if (ast_connect(s, them)) { 00698 ast_log(LOG_WARNING, "Cannot connect\n"); 00699 close(s); 00700 return -1; 00701 } 00702 if (ast_getsockname(s, us)) { 00703 00704 ast_log(LOG_WARNING, "Cannot get socket name\n"); 00705 close(s); 00706 return -1; 00707 } 00708 close(s); 00709 00710 { 00711 const char *them_addr = ast_strdupa(ast_sockaddr_stringify_addr(them)); 00712 const char *us_addr = ast_strdupa(ast_sockaddr_stringify_addr(us)); 00713 00714 ast_debug(3, "For destination '%s', our source address is '%s'.\n", 00715 them_addr, us_addr); 00716 } 00717 00718 ast_sockaddr_set_port(us, port); 00719 00720 return 0; 00721 }
int ast_str2cos | ( | const char * | value, | |
unsigned int * | cos | |||
) |
Convert a string to the appropriate COS value.
value | The COS string to convert | |
[out] | cos | The integer representation of that COS value |
-1 | Failure | |
0 | Success |
Definition at line 632 of file acl.c.
Referenced by config_parse_variables(), reload_config(), and set_config().
00633 { 00634 int fval; 00635 00636 if (sscanf(value, "%30d", &fval) == 1) { 00637 if (fval < 8) { 00638 *cos = fval; 00639 return 0; 00640 } 00641 } 00642 00643 return -1; 00644 }
int ast_str2tos | ( | const char * | value, | |
unsigned int * | tos | |||
) |
Convert a string to the appropriate TOS value.
value | The TOS string to convert | |
[out] | tos | The integer representation of that TOS value |
-1 | Failure | |
0 | Success |
Definition at line 646 of file acl.c.
References ARRAY_LEN, dscp_pool1, name, and dscp_codepoint::space.
Referenced by config_parse_variables(), iax_template_parse(), reload_config(), and set_config().
00647 { 00648 int fval; 00649 unsigned int x; 00650 00651 if (sscanf(value, "%30i", &fval) == 1) { 00652 *tos = fval & 0xFF; 00653 return 0; 00654 } 00655 00656 for (x = 0; x < ARRAY_LEN(dscp_pool1); x++) { 00657 if (!strcasecmp(value, dscp_pool1[x].name)) { 00658 *tos = dscp_pool1[x].space << 2; 00659 return 0; 00660 } 00661 } 00662 00663 return -1; 00664 }
const char* ast_tos2str | ( | unsigned int | tos | ) |
Convert a TOS value into its string representation.
tos | The TOS value to look up |
Definition at line 666 of file acl.c.
References ARRAY_LEN, dscp_pool1, dscp_codepoint::name, and dscp_codepoint::space.
Referenced by sip_show_settings().
00667 { 00668 unsigned int x; 00669 00670 for (x = 0; x < ARRAY_LEN(dscp_pool1); x++) { 00671 if (dscp_pool1[x].space == (tos >> 2)) { 00672 return dscp_pool1[x].name; 00673 } 00674 } 00675 00676 return "unknown"; 00677 }
static int get_local_address | ( | struct ast_sockaddr * | ourip | ) | [static] |
Definition at line 115 of file acl.c.
References free, malloc, and score_address().
Referenced by ast_find_ourip().
00116 { 00117 int s, res = -1; 00118 #ifdef SOLARIS 00119 struct lifreq *ifr = NULL; 00120 struct lifnum ifn; 00121 struct lifconf ifc; 00122 struct sockaddr_in *sa; 00123 char *buf = NULL; 00124 int bufsz, x; 00125 #endif /* SOLARIS */ 00126 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) 00127 struct ifaddrs *ifap, *ifaphead; 00128 int rtnerr; 00129 const struct sockaddr_in *sin; 00130 #endif /* BSD_OR_LINUX */ 00131 struct in_addr best_addr; 00132 int best_score = -100; 00133 memset(&best_addr, 0, sizeof(best_addr)); 00134 00135 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) 00136 rtnerr = getifaddrs(&ifaphead); 00137 if (rtnerr) { 00138 perror(NULL); 00139 return -1; 00140 } 00141 #endif /* BSD_OR_LINUX */ 00142 00143 s = socket(AF_INET, SOCK_STREAM, 0); 00144 00145 if (s > 0) { 00146 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) 00147 for (ifap = ifaphead; ifap; ifap = ifap->ifa_next) { 00148 00149 if (ifap->ifa_addr && ifap->ifa_addr->sa_family == AF_INET) { 00150 sin = (const struct sockaddr_in *) ifap->ifa_addr; 00151 score_address(sin, &best_addr, &best_score); 00152 res = 0; 00153 00154 if (best_score == 0) { 00155 break; 00156 } 00157 } 00158 } 00159 #endif /* BSD_OR_LINUX */ 00160 00161 /* There is no reason whatsoever that this shouldn't work on Linux or BSD also. */ 00162 #ifdef SOLARIS 00163 /* Get a count of interfaces on the machine */ 00164 ifn.lifn_family = AF_INET; 00165 ifn.lifn_flags = 0; 00166 ifn.lifn_count = 0; 00167 if (ioctl(s, SIOCGLIFNUM, &ifn) < 0) { 00168 close(s); 00169 return -1; 00170 } 00171 00172 bufsz = ifn.lifn_count * sizeof(struct lifreq); 00173 if (!(buf = malloc(bufsz))) { 00174 close(s); 00175 return -1; 00176 } 00177 memset(buf, 0, bufsz); 00178 00179 /* Get a list of interfaces on the machine */ 00180 ifc.lifc_len = bufsz; 00181 ifc.lifc_buf = buf; 00182 ifc.lifc_family = AF_INET; 00183 ifc.lifc_flags = 0; 00184 if (ioctl(s, SIOCGLIFCONF, &ifc) < 0) { 00185 close(s); 00186 free(buf); 00187 return -1; 00188 } 00189 00190 for (ifr = ifc.lifc_req, x = 0; x < ifn.lifn_count; ifr++, x++) { 00191 sa = (struct sockaddr_in *)&(ifr->lifr_addr); 00192 score_address(sa, &best_addr, &best_score); 00193 res = 0; 00194 00195 if (best_score == 0) { 00196 break; 00197 } 00198 } 00199 00200 free(buf); 00201 #endif /* SOLARIS */ 00202 00203 close(s); 00204 } 00205 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) 00206 freeifaddrs(ifaphead); 00207 #endif /* BSD_OR_LINUX */ 00208 00209 if (res == 0 && ourip) { 00210 ast_sockaddr_setnull(ourip); 00211 ourip->ss.ss_family = AF_INET; 00212 ((struct sockaddr_in *)&ourip->ss)->sin_addr = best_addr; 00213 } 00214 return res; 00215 }
static int parse_cidr_mask | ( | struct ast_sockaddr * | addr, | |
int | is_v4, | |||
const char * | mask_str | |||
) | [static] |
Parse a netmask in CIDR notation.
For a mask of an IPv4 address, this should be a number between 0 and 32. For a mask of an IPv6 address, this should be a number between 0 and 128. This function creates an IPv6 ast_sockaddr from the given netmask. For masks of IPv4 addresses, this is accomplished by adding 96 to the original netmask.
[out] | addr | The ast_sockaddr produced from the CIDR netmask |
is_v4 | Tells if the address we are masking is IPv4. | |
mask_str | The CIDR mask to convert |
-1 | Failure | |
0 | Success |
Definition at line 347 of file acl.c.
References ast_sockaddr_from_sin, ast_sockaddr::len, ast_sockaddr::ss, and V6_WORD.
Referenced by ast_append_ha().
00348 { 00349 int mask; 00350 00351 if (sscanf(mask_str, "%30d", &mask) != 1) { 00352 return -1; 00353 } 00354 00355 if (is_v4) { 00356 struct sockaddr_in sin; 00357 if (mask < 0 || mask > 32) { 00358 return -1; 00359 } 00360 memset(&sin, 0, sizeof(sin)); 00361 sin.sin_family = AF_INET; 00362 /* If mask is 0, then we already have the 00363 * appropriate all 0s address in sin from 00364 * the above memset. 00365 */ 00366 if (mask != 0) { 00367 sin.sin_addr.s_addr = htonl(0xFFFFFFFF << (32 - mask)); 00368 } 00369 ast_sockaddr_from_sin(addr, &sin); 00370 } else { 00371 struct sockaddr_in6 sin6; 00372 int i; 00373 if (mask < 0 || mask > 128) { 00374 return -1; 00375 } 00376 memset(&sin6, 0, sizeof(sin6)); 00377 sin6.sin6_family = AF_INET6; 00378 for (i = 0; i < 4; ++i) { 00379 /* Once mask reaches 0, we don't have 00380 * to explicitly set anything anymore 00381 * since sin6 was zeroed out already 00382 */ 00383 if (mask > 0) { 00384 V6_WORD(&sin6, i) = htonl(0xFFFFFFFF << (mask < 32 ? (32 - mask) : 0)); 00385 mask -= mask < 32 ? mask : 32; 00386 } 00387 } 00388 memcpy(&addr->ss, &sin6, sizeof(sin6)); 00389 addr->len = sizeof(sin6); 00390 } 00391 00392 return 0; 00393 }
static int resolve_first | ( | struct ast_sockaddr * | addr, | |
const char * | name, | |||
int | flag, | |||
int | family | |||
) | [static] |
Definition at line 555 of file acl.c.
References ast_debug, ast_free, ast_log(), ast_sockaddr_copy(), ast_sockaddr_resolve(), and LOG_WARNING.
Referenced by ast_find_ourip(), and ast_get_ip_or_srv().
00557 { 00558 struct ast_sockaddr *addrs; 00559 int addrs_cnt; 00560 00561 addrs_cnt = ast_sockaddr_resolve(&addrs, name, flag, family); 00562 if (addrs_cnt > 0) { 00563 if (addrs_cnt > 1) { 00564 ast_debug(1, "Multiple addresses. Using the first only\n"); 00565 } 00566 ast_sockaddr_copy(addr, &addrs[0]); 00567 ast_free(addrs); 00568 } else { 00569 ast_log(LOG_WARNING, "Unable to lookup '%s'\n", name); 00570 return -1; 00571 } 00572 00573 return 0; 00574 }
static void score_address | ( | const struct sockaddr_in * | sin, | |
struct in_addr * | best_addr, | |||
int * | best_score | |||
) | [static] |
Definition at line 56 of file acl.c.
References ast_inet_ntoa().
Referenced by get_local_address().
00057 { 00058 const char *address; 00059 int score; 00060 00061 address = ast_inet_ntoa(sin->sin_addr); 00062 00063 /* RFC 1700 alias for the local network */ 00064 if (address[0] == '0') { 00065 score = -25; 00066 /* RFC 1700 localnet */ 00067 } else if (strncmp(address, "127", 3) == 0) { 00068 score = -20; 00069 /* RFC 1918 non-public address space */ 00070 } else if (strncmp(address, "10.", 3) == 0) { 00071 score = -5; 00072 /* RFC 1918 non-public address space */ 00073 } else if (strncmp(address, "172", 3) == 0) { 00074 /* 172.16.0.0 - 172.19.255.255, but not 172.160.0.0 - 172.169.255.255 */ 00075 if (address[4] == '1' && address[5] >= '6' && address[6] == '.') { 00076 score = -5; 00077 /* 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 */ 00078 } else if (address[4] == '2' && address[6] == '.') { 00079 score = -5; 00080 /* 172.30.0.0 - 172.31.255.255, but not 172.3.0.0 - 172.3.255.255 */ 00081 } else if (address[4] == '3' && (address[5] == '0' || address[5] == '1')) { 00082 score = -5; 00083 /* All other 172 addresses are public */ 00084 } else { 00085 score = 0; 00086 } 00087 /* RFC 2544 Benchmark test range (198.18.0.0 - 198.19.255.255, but not 198.180.0.0 - 198.199.255.255) */ 00088 } else if (strncmp(address, "198.1", 5) == 0 && address[5] >= '8' && address[6] == '.') { 00089 score = -10; 00090 /* RFC 1918 non-public address space */ 00091 } else if (strncmp(address, "192.168", 7) == 0) { 00092 score = -5; 00093 /* RFC 3330 Zeroconf network */ 00094 } else if (strncmp(address, "169.254", 7) == 0) { 00095 /*!\note Better score than a test network, but not quite as good as RFC 1918 00096 * address space. The reason is that some Linux distributions automatically 00097 * configure a Zeroconf address before trying DHCP, so we want to prefer a 00098 * DHCP lease to a Zeroconf address. 00099 */ 00100 score = -10; 00101 /* RFC 3330 Test network */ 00102 } else if (strncmp(address, "192.0.2.", 8) == 0) { 00103 score = -15; 00104 /* Every other address should be publically routable */ 00105 } else { 00106 score = 0; 00107 } 00108 00109 if (score > *best_score) { 00110 *best_score = score; 00111 memcpy(best_addr, &sin->sin_addr, sizeof(*best_addr)); 00112 } 00113 }
struct dscp_codepoint dscp_pool1[] [static] |