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socket_info.c
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socket_info.c
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/*
* find & manage listen addresses
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* Kamailio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*!
* \file
* \brief Kamailio core :: find & manage listen addresses
*
* This file contains code that initializes and handles Kamailio listen addresses
* lists (struct socket_info). It is used mainly on startup.
* \ingroup core
* Module: \ref core
*/
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/utsname.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <ifaddrs.h>
#include <netdb.h>
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#include "globals.h"
#include "socket_info.h"
#include "dprint.h"
#include "mem/mem.h"
#include "ut.h"
#include "resolve.h"
#include "name_alias.h"
/* list manip. functions (internal use only) */
/* append */
#define sock_listadd(head, el) \
do{\
if (*(head)==0) *(head)=(el); \
else{ \
for((el)->next=*(head); (el)->next->next;\
(el)->next=(el)->next->next); \
(el)->next->next=(el); \
(el)->prev=(el)->next; \
(el)->next=0; \
}\
}while(0)
/* insert after "after" */
#define sock_listins(el, after) \
do{ \
if ((after)){\
(el)->next=(after)->next; \
if ((after)->next) (after)->next->prev=(el); \
(after)->next=(el); \
(el)->prev=(after); \
}else{ /* after==0 = list head */ \
(after)=(el); \
(el)->next=(el)->prev=0; \
}\
}while(0)
#define sock_listrm(head, el) \
do {\
if (*(head)==(el)) *(head)=(el)->next; \
if ((el)->next) (el)->next->prev=(el)->prev; \
if ((el)->prev) (el)->prev->next=(el)->next; \
}while(0)
#define addr_info_listadd sock_listadd
#define addr_info_listins sock_listins
#define addr_info_listrm sock_listrm
/**
* return the scope for IPv6 interface matching the ipval parameter
* - needed for binding to link local IPv6 addresses
*/
unsigned int ipv6_get_netif_scope(char *ipval)
{
struct ifaddrs *netiflist = NULL;
struct ifaddrs *netif = NULL;
char ipaddr[NI_MAXHOST];
unsigned int iscope = 0;
int i = 0;
int r = 0;
ip_addr_t *ipa = NULL;
ip_addr_t vaddr;
str ips;
ips.s = ipval;
ips.len = strlen(ipval);
ipa = str2ip6(&ips);
if(ipa==NULL) {
LM_ERR("could not parse ipv6 address: %s\n", ipval);
return 0;
}
memcpy(&vaddr, ipa, sizeof(ip_addr_t));
ipa = NULL;
/* walk over the list of all network interface addresses */
if(getifaddrs(&netiflist)!=0) {
LM_ERR("failed to get network interfaces - errno: %d\n", errno);
return 0;
}
for(netif = netiflist; netif; netif = netif->ifa_next) {
/* only active and ipv6 */
if (netif->ifa_addr && (netif->ifa_flags & IFF_UP)
&& netif->ifa_addr->sa_family==AF_INET6) {
r = getnameinfo(netif->ifa_addr, sizeof(struct sockaddr_in6),
ipaddr, sizeof(ipaddr), NULL, 0, NI_NUMERICHOST);
if(r!=0) {
LM_ERR("failed to get the name info - ret: %d\n", r);
goto done;
}
/* strip the interface name after */
for(i=0; ipaddr[i]; i++) {
if(ipaddr[i]=='%') {
ipaddr[i]='\0';
break;
}
}
ips.s = ipaddr;
ips.len = strlen(ipaddr);
ipa = str2ip6(&ips);
if(ipa!=NULL) {
/* if the ips match, get scope index from interface name */
if(ip_addr_cmp(&vaddr, ipa)) {
iscope=if_nametoindex(netif->ifa_name);
goto done;
}
}
}
}
done:
freeifaddrs(netiflist);
return iscope;
}
inline static void addr_info_list_ins_lst(struct addr_info* lst,
struct addr_info* after)
{
struct addr_info* l;
struct addr_info* n;
if (lst){
n=after->next;
after->next=lst;
lst->prev=after;
if (n){
for(l=lst; l->next; l=l->next);
l->next=n;
n->prev=l;
}
}
}
/* protocol order, filled by init_proto_order() */
enum sip_protos nxt_proto[PROTO_LAST+1]=
{ PROTO_UDP, PROTO_TCP, PROTO_TLS, PROTO_SCTP, 0 };
/* Deliberately left PROTO_WS and PROTO_WSS out of this as they are just
upgraded TCP and TLS connections */
/* another helper function, it just fills a struct addr_info
* returns: 0 on success, -1 on error*/
static int init_addr_info(struct addr_info* a,
char* name, enum si_flags flags)
{
memset(a, 0, sizeof(*a));
a->name.len=strlen(name);
a->name.s=pkg_malloc(a->name.len+1); /* include \0 */
if (a->name.s==0) goto error;
memcpy(a->name.s, name, a->name.len+1);
a->flags=flags;
return 0;
error:
PKG_MEM_ERROR;
return -1;
}
/* returns 0 on error, new addr_info_lst element on success */
static inline struct addr_info* new_addr_info(char* name,
enum si_flags gf)
{
struct addr_info* al;
al=pkg_malloc(sizeof(*al));
if (al==0) goto error;
al->next=0;
al->prev=0;
if (init_addr_info(al, name, gf)!=0) goto error;
return al;
error:
PKG_MEM_ERROR;
if (al){
if (al->name.s) pkg_free(al->name.s);
pkg_free(al);
}
return 0;
}
static inline void free_addr_info(struct addr_info* a)
{
if (a){
if (a->name.s){
pkg_free(a->name.s);
a->name.s=0;
}
pkg_free(a);
}
}
static inline void free_addr_info_lst(struct addr_info** lst)
{
struct addr_info* a;
struct addr_info* tmp;
a=*lst;
while(a){
tmp=a;
a=a->next;
free_addr_info(tmp);
}
}
/* adds a new add_info_lst element to the corresponding list
* returns 0 on success, -1 on error */
static int new_addr_info2list(char* name, enum si_flags f,
struct addr_info** l)
{
struct addr_info * al;
al=new_addr_info(name, f);
if (al==0) goto error;
addr_info_listadd(l, al);
return 0;
error:
return -1;
}
/* another helper function, it just creates a socket_info struct
* allocates a si and a si->name in new pkg memory */
static inline struct socket_info* new_sock_info( char* name,
struct name_lst* addr_l,
unsigned short port, unsigned short proto,
char *usename, unsigned short useport,
char *sockname, enum si_flags flags)
{
struct socket_info* si;
struct name_lst* n;
struct hostent* he;
char *p;
si=(struct socket_info*) pkg_malloc(sizeof(struct socket_info));
if (si==0) goto error;
memset(si, 0, sizeof(struct socket_info));
si->socket=-1;
si->name.len=strlen(name);
si->name.s=(char*)pkg_malloc(si->name.len+1); /* include \0 */
if (si->name.s==0) goto error;
memcpy(si->name.s, name, si->name.len+1);
/* set port & proto */
si->port_no=port;
si->proto=proto;
si->flags=flags;
si->addr_info_lst=0;
for (n=addr_l; n; n=n->next){
if (new_addr_info2list(n->name, n->flags, &si->addr_info_lst)!=0){
LM_ERR("new_addr_info2list failed\n");
goto error;
}
}
if(sockname!=NULL) {
si->sockname.len = strlen(sockname);
si->sockname.s=(char*)pkg_malloc(si->sockname.len+1); /* include \0 */
if (si->sockname.s==0) { goto error; }
memcpy(si->sockname.s, sockname, si->sockname.len+1);
}
if(usename!=NULL)
{
si->useinfo.name.len=strlen(usename);
si->useinfo.name.s=(char*)pkg_malloc(si->useinfo.name.len+1);
if (si->useinfo.name.s==0)
goto error;
strcpy(si->useinfo.name.s, usename);
if(usename[0]=='[' && usename[si->useinfo.name.len-1]==']')
{
si->useinfo.address_str.len = si->useinfo.name.len - 2;
p = si->useinfo.name.s + 1;
} else {
si->useinfo.address_str.len = si->useinfo.name.len;
p = si->useinfo.name.s;
}
si->useinfo.address_str.s=(char*)pkg_malloc(si->useinfo.address_str.len+1);
if(si->useinfo.address_str.s==NULL)
goto error;
strncpy(si->useinfo.address_str.s, p, si->useinfo.address_str.len);
si->useinfo.address_str.s[si->useinfo.address_str.len] = '\0';
p = int2str(useport, &si->useinfo.port_no_str.len);
if(p==NULL)
goto error;
si->useinfo.port_no_str.s=(char*)pkg_malloc(si->useinfo.port_no_str.len+1);
if(si->useinfo.port_no_str.s==NULL)
goto error;
strcpy(si->useinfo.port_no_str.s, p);
si->useinfo.port_no = useport;
he=resolvehost(si->useinfo.name.s);
if (he==0){
LM_ERR("unable to resolve advertised name %s\n", si->useinfo.name.s);
goto error;
}
hostent2ip_addr(&si->useinfo.address, he, 0);
}
return si;
error:
PKG_MEM_ERROR;
if (si) {
if(si->name.s) {
pkg_free(si->name.s);
}
if(si->sockname.s) {
pkg_free(si->sockname.s);
}
pkg_free(si);
}
return 0;
}
/* delete a socket_info struct */
static void free_sock_info(struct socket_info* si)
{
if(si){
if(si->name.s) pkg_free(si->name.s);
if(si->address_str.s) pkg_free(si->address_str.s);
if(si->port_no_str.s) pkg_free(si->port_no_str.s);
if(si->addr_info_lst) free_addr_info_lst(&si->addr_info_lst);
if(si->sock_str.s) pkg_free(si->sock_str.s);
if(si->sockname.s) pkg_free(si->sockname.s);
if(si->useinfo.name.s) pkg_free(si->useinfo.name.s);
if(si->useinfo.port_no_str.s) pkg_free(si->useinfo.port_no_str.s);
if(si->useinfo.sock_str.s) pkg_free(si->useinfo.sock_str.s);
}
}
char* get_valid_proto_name(unsigned short proto)
{
switch(proto){
case PROTO_NONE:
return "*";
case PROTO_UDP:
return "udp";
#ifdef USE_TCP
case PROTO_TCP:
return "tcp";
#endif
#ifdef USE_TLS
case PROTO_TLS:
return "tls";
#endif
#ifdef USE_SCTP
case PROTO_SCTP:
return "sctp";
#endif
default:
return "unknown";
}
}
/** Convert socket to its textual representation.
*
* This function converts the transport protocol, the IP address and the port
* number in a comma delimited string of form proto:ip:port. The resulting
* string is NOT zero terminated
*
* @param s is a pointer to the destination memory buffer
* @param len is a pointer to an integer variable. Initially the variable
* should contain the size of the buffer in s. The value of the variable
* will be changed to the length of the resulting string on success and
* to the desired size of the destination buffer if it is too small
* @param si is a pointer to the socket_info structure to be printed
* @return -1 on error and 0 on success
*/
int socket2str(char* s, int* len, struct socket_info* si)
{
return socketinfo2str(s, len, si, 0);
}
int socketinfo2str(char* s, int* len, struct socket_info* si, int mode)
{
str proto;
int l;
proto.s = get_valid_proto_name(si->proto);
proto.len = strlen(proto.s);
if(mode==1)
l = proto.len + si->useinfo.name.len + si->useinfo.port_no_str.len + 2;
else
l = proto.len + si->address_str.len + si->port_no_str.len + 2;
if(si->address.af==AF_INET6)
l += 2;
if (*len < l) {
LM_ERR("Destionation buffer too short\n");
*len = l;
return -1;
}
memcpy(s, proto.s, proto.len);
s += proto.len;
*s = ':'; s++;
if(mode==1){
memcpy(s, si->useinfo.name.s, si->useinfo.name.len);
s += si->useinfo.name.len;
*s = ':'; s++;
memcpy(s, si->useinfo.port_no_str.s, si->useinfo.port_no_str.len);
s += si->useinfo.port_no_str.len;
} else {
if(si->address.af==AF_INET6) {
*s = '['; s++;
}
memcpy(s, si->address_str.s, si->address_str.len);
s += si->address_str.len;
if(si->address.af==AF_INET6) {
*s = ']'; s++;
}
*s = ':'; s++;
memcpy(s, si->port_no_str.s, si->port_no_str.len);
s += si->port_no_str.len;
}
*len = l;
return 0;
}
/* Fill si->sock_str with string representing the socket_info structure,
* format of the string is 'proto:address:port'. Returns 0 on success and
* negative number on failure.
*/
static int fix_sock_str(struct socket_info* si)
{
int len = MAX_SOCKET_STR;
if (si->sock_str.s) pkg_free(si->sock_str.s);
si->sock_str.s = pkg_malloc(len + 1);
if (si->sock_str.s == NULL) {
PKG_MEM_ERROR;
return -1;
}
if (socketinfo2str(si->sock_str.s, &len, si, 0) < 0) {
BUG("fix_sock_str: Error in socket to str\n");
return -1;
}
si->sock_str.s[len] = '\0';
si->sock_str.len = len;
if(si->useinfo.name.s!=NULL)
{
len = MAX_SOCKET_ADVERTISE_STR;
if (si->useinfo.sock_str.s) pkg_free(si->useinfo.sock_str.s);
si->useinfo.sock_str.s = pkg_malloc(len + 1);
if (si->useinfo.sock_str.s == NULL) {
PKG_MEM_ERROR;
return -1;
}
if (socketinfo2str(si->useinfo.sock_str.s, &len, si, 1) < 0) {
BUG("fix_sock_str: Error in socket to str\n");
return -1;
}
si->useinfo.sock_str.s[len] = '\0';
si->useinfo.sock_str.len = len;
}
return 0;
}
/* returns 0 if support for the protocol is not compiled or if proto is
invalid */
struct socket_info** get_sock_info_list(unsigned short proto)
{
switch(proto){
case PROTO_UDP:
return &udp_listen;
break;
case PROTO_TCP:
case PROTO_WS:
#ifdef USE_TCP
return &tcp_listen;
#endif
break;
case PROTO_TLS:
case PROTO_WSS:
#ifdef USE_TLS
return &tls_listen;
#endif
break;
case PROTO_SCTP:
#ifdef USE_SCTP
return &sctp_listen;
#endif
break;
default:
LM_CRIT("invalid proto %d\n", proto);
}
return 0;
}
/* Check list of active local IPs for grep_sock_info
* This function is only used for sockets with the SI_IS_VIRTUAL flag set. This
* is so floating (virtual) IPs that are not currently local, are not returned
* as matches by grep_sock_info.
*
* Params:
* - si - Socket info of socket that has been flagged with SI_IS_VIRTUAL,
* that we want to check if it's actually local right now.
*
* Returns 1 if socket is local, or 0 if not.
*/
static int check_local_addresses(struct socket_info* si)
{
int match = 0;
struct ifaddrs *ifap, *ifa;
if (si == NULL) {
LM_ERR("Socket info is NULL. Returning no match.\n");
return 0;
}
if (!(si->flags & SI_IS_VIRTUAL)) {
LM_ERR("Have been passed a socket without the virtual flag set. This should "
"not happen. Returning a match to maintain standard behaviour.\n");
return 1;
}
if (getifaddrs(&ifap) != 0) {
LM_ERR("getifaddrs failed. Assuming no match.\n");
return 0;
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next)
{
/* skip if no IP addr associated with the interface */
if (ifa->ifa_addr==0)
continue;
#ifdef AF_PACKET
/* skip AF_PACKET addr family since it is of no use later on */
if (ifa->ifa_addr->sa_family == AF_PACKET)
continue;
#endif
struct ip_addr local_addr;
sockaddr2ip_addr(&local_addr, (struct sockaddr*)ifa->ifa_addr);
LM_DBG("Checking local address: %s\n", ip_addr2a(&local_addr));
if (ip_addr_cmp(&si->address, &local_addr)) {
match = 1;
LM_DBG("Found matching local IP %s for virtual socket %s\n", ip_addr2a(&local_addr), si->name.s);
break;
}
}
freeifaddrs(ifap);
//Default to not local if no match is found
if (!match) {
LM_DBG("No matching local IP found for socket %s.\n", si->name.s);
return 0;
} else {
return 1;
}
}
/* helper function for grep_sock_info
* params:
* host - hostname to compare with
* name - official name
* addr_str - name's resolved ip address converted to string
* ip_addr - name's ip address
* flags - set to SI_IS_IP if name contains an IP
*
* returns 0 if host matches, -1 if not */
inline static int si_hname_cmp(str* host, str* name, str* addr_str,
struct ip_addr* ip_addr, int flags)
{
struct ip_addr* ip6;
if ( (host->len==name->len) &&
(strncasecmp(host->s, name->s, name->len)==0) /*slower*/)
/* comp. must be case insensitive, host names
* can be written in mixed case, it will also match
* ipv6 addresses if we are lucky*/
goto found;
/* check if host == ip address */
/* ipv6 case is uglier, host can be [3ffe::1] */
ip6=str2ip6(host);
if (ip6){
if (ip_addr_cmp(ip6, ip_addr))
goto found; /* match */
else
return -1; /* no match, but this is an ipv6 address
so no point in trying ipv4 */
}
/* ipv4 */
if ( (!(flags&SI_IS_IP)) && (host->len==addr_str->len) &&
(memcmp(host->s, addr_str->s, addr_str->len)==0) )
goto found;
return -1;
found:
return 0;
}
/* checks if the proto: host:port is one of the address we listen on
* and returns the corresponding socket_info structure.
* if port==0, the port number is ignored
* if proto==0 (PROTO_NONE) the protocol is ignored
* returns 0 if not found
* WARNING: uses str2ip6 so it will overwrite any previous
* unsaved result of this function (static buffer)
*/
struct socket_info* grep_sock_info(str* host, unsigned short port,
unsigned short proto)
{
str hname;
struct socket_info* si;
struct socket_info** list;
struct addr_info* ai;
unsigned short c_proto;
hname=*host;
if ((hname.len>2) && ((*hname.s)=='[') && (hname.s[hname.len-1]==']')) {
/* ipv6 - skip [] */
hname.s++;
hname.len-=2;
}
c_proto=(proto!=PROTO_NONE)?proto:PROTO_UDP;
retry:
do {
/* get the proper sock_list */
list=get_sock_info_list(c_proto);
if (list==0) {
/* disabled or unknown protocol */
continue;
}
for (si=*list; si; si=si->next) {
LM_DBG("checking if host==us: %d==%d && [%.*s] == [%.*s]\n",
hname.len,
si->name.len,
hname.len, hname.s,
si->name.len, si->name.s
);
if (port) {
LM_DBG("checking if port %d (advertise %d) matches port %d\n",
si->port_no, si->useinfo.port_no, port);
if (si->port_no!=port && si->useinfo.port_no!=port) {
continue;
}
}
if (si_hname_cmp(&hname, &si->name, &si->address_str,
&si->address, si->flags)==0) {
if (si->flags & SI_IS_VIRTUAL) {
LM_DBG("Checking virtual socket: [%.*s]\n", si->name.len, si->name.s);
if (check_local_addresses(si)) {
goto found;
} else {
LM_DBG("Skipping virtual socket that is not local.\n");
}
} else {
goto found;
}
}
if(si->useinfo.name.s!=NULL) {
LM_DBG("checking advertise if host==us:"
" %d==%d && [%.*s] == [%.*s]\n",
hname.len,
si->useinfo.name.len,
hname.len, hname.s,
si->useinfo.name.len, si->useinfo.name.s
);
if (si_hname_cmp(&hname, &si->useinfo.name,
&si->useinfo.address_str, &si->useinfo.address,
si->flags)==0) {
goto found;
}
}
/* try among the extra addresses */
for (ai=si->addr_info_lst; ai; ai=ai->next) {
if (si_hname_cmp(&hname, &ai->name, &ai->address_str,
&ai->address, ai->flags)==0) {
goto found;
}
}
}
} while( (proto==0) && (c_proto=next_proto(c_proto)) );
#ifdef USE_TLS
if (unlikely(c_proto == PROTO_WS)) {
c_proto = PROTO_WSS;
goto retry;
}
#endif
/* not_found: */
return 0;
found:
return si;
}
/**
*
*/
static int _ksr_sockets_no = 0;
/**
*
*/
int ksr_sockets_no_get(void)
{
return _ksr_sockets_no;
}
/**
*
*/
void ksr_sockets_index(void)
{
socket_info_t *si = NULL;
struct socket_info** list;
unsigned short c_proto;
if(_ksr_sockets_no > 0) {
return;
}
c_proto = PROTO_UDP;
do {
/* get the proper sock_list */
list=get_sock_info_list(c_proto);
if (list==0) {
/* disabled or unknown protocol */
continue;
}
for (si=*list; si; si=si->next) {
if(si->sockname.s == NULL) {
continue;
}
si->gindex = _ksr_sockets_no;
_ksr_sockets_no++;
}
} while((c_proto = next_proto(c_proto))!=0);
LM_DBG("number of listen sockets: %d\n", _ksr_sockets_no);
}
socket_info_t* ksr_get_socket_by_name(str *sockname)
{
socket_info_t *si = NULL;
struct socket_info** list;
unsigned short c_proto;
c_proto = PROTO_UDP;
do {
/* get the proper sock_list */
list=get_sock_info_list(c_proto);
if (list==0) {
/* disabled or unknown protocol */
continue;
}
for (si=*list; si; si=si->next) {
if(si->sockname.s == NULL) {
continue;
}
LM_DBG("checking if sockname %.*s matches %.*s\n",
sockname->len, sockname->s,
si->sockname.len, si->sockname.s);
if (sockname->len == si->sockname.len
&& strncasecmp(sockname->s, si->sockname.s,
sockname->len)==0) {
return si;
}
}
} while((c_proto = next_proto(c_proto))!=0);
return NULL;
}
socket_info_t* ksr_get_socket_by_listen(str *sockstr)
{
socket_info_t *si = NULL;
struct socket_info** list;
unsigned short c_proto;
c_proto = PROTO_UDP;
do {
/* get the proper sock_list */
list=get_sock_info_list(c_proto);
if (list==0) {
/* disabled or unknown protocol */
continue;
}
for (si=*list; si; si=si->next) {
if(si->sock_str.s == NULL) {
continue;
}
LM_DBG("checking if listen %.*s matches %.*s\n",
sockstr->len, sockstr->s,
si->sock_str.len, si->sock_str.s);
if (sockstr->len == si->sock_str.len
&& strncasecmp(sockstr->s, si->sock_str.s,
sockstr->len)==0) {
return si;
}
}
} while((c_proto = next_proto(c_proto))!=0);
return NULL;
}
socket_info_t* ksr_get_socket_by_advertise(str *sockstr)
{
socket_info_t *si = NULL;
struct socket_info** list;
unsigned short c_proto;
c_proto = PROTO_UDP;
do {
/* get the proper sock_list */
list=get_sock_info_list(c_proto);
if (list==0) {
/* disabled or unknown protocol */
continue;
}
for (si=*list; si; si=si->next) {
if(si->useinfo.sock_str.s == NULL) {
continue;
}
LM_DBG("checking if listen %.*s matches %.*s\n",
sockstr->len, sockstr->s,
si->useinfo.sock_str.len, si->useinfo.sock_str.s);
if (sockstr->len == si->useinfo.sock_str.len
&& strncasecmp(sockstr->s, si->useinfo.sock_str.s,
sockstr->len)==0) {
return si;
}
}
} while((c_proto = next_proto(c_proto))!=0);
return NULL;
}
socket_info_t* ksr_get_socket_by_index(int idx)
{
socket_info_t *si = NULL;
struct socket_info** list;
unsigned short c_proto;
if (idx<0) {
idx += _ksr_sockets_no;
if (idx < 0) {
LM_DBG("negative overall index\n");
return NULL;
}
}
c_proto = PROTO_UDP;
do {
/* get the proper sock_list */
list=get_sock_info_list(c_proto);
if (list==0) {
/* disabled or unknown protocol */
continue;
}
for (si=*list; si; si=si->next) {
if(idx==0) {
return si;
}
idx--;
}
} while((c_proto = next_proto(c_proto))!=0);
return NULL;
}
socket_info_t* ksr_get_socket_by_address(str *sockstr)
{
socket_info_t *si = NULL;
si = ksr_get_socket_by_listen(sockstr);
if(si!=NULL) {
return si;
}
return ksr_get_socket_by_advertise(sockstr);
}
/* checks if the proto:port is one of the ports we listen on
* and returns the corresponding socket_info structure.
* if proto==0 (PROTO_NONE) the protocol is ignored
* returns 0 if not found
*/
struct socket_info* grep_sock_info_by_port(unsigned short port,
unsigned short proto)
{
struct socket_info* si;
struct socket_info** list;
unsigned short c_proto;
if (!port) {
goto not_found;
}
c_proto=(proto!=PROTO_NONE)?proto:PROTO_UDP;
do {
/* get the proper sock_list */
list=get_sock_info_list(c_proto);
if (list==0) /* disabled or unknown protocol */
continue;
for (si=*list; si; si=si->next){
LM_DBG("checking if port %d matches port %d\n", si->port_no, port);
if (si->port_no==port) {
goto found;
}
}
} while( (proto==0) && (c_proto=next_proto(c_proto)) );
not_found:
return 0;
found:
return si;
}