Sat Nov 1 06:31:07 2008

Asterisk developer's documentation

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netsock.c File Reference

Network socket handling. More...

#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 "asterisk.h"
#include "asterisk/netsock.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"

Include dependency graph for netsock.c:

Go to the source code of this file.

Data Structures
struct	ast_netsock
struct	ast_netsock_list
Functions
ast_netsock *	ast_netsock_bind (struct ast_netsock_list *list, struct io_context *ioc, const char *bindinfo, int defaultport, int tos, ast_io_cb callback, void *data)
ast_netsock *	ast_netsock_bindaddr (struct ast_netsock_list *list, struct io_context *ioc, struct sockaddr_in *bindaddr, int tos, ast_io_cb callback, void *data)
sockaddr_in *	ast_netsock_boundaddr (const struct ast_netsock *ns)
void *	ast_netsock_data (const struct ast_netsock *ns)
static void	ast_netsock_destroy (struct ast_netsock *netsock)
ast_netsock *	ast_netsock_find (struct ast_netsock_list *list, struct sockaddr_in *sa)
int	ast_netsock_init (struct ast_netsock_list *list)
ast_netsock_list *	ast_netsock_list_alloc (void)
int	ast_netsock_release (struct ast_netsock_list *list)
int	ast_netsock_sockfd (const struct ast_netsock *ns)
void	ast_netsock_unref (struct ast_netsock *ns)

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Detailed Description

Network socket handling.

Definition in file netsock.c.

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Function Documentation

struct ast_netsock* ast_netsock_bind	(	struct ast_netsock_list *	list,
		struct io_context *	ioc,
		const char *	bindinfo,
		int	defaultport,
		int	tos,
		ast_io_cb	callback,
		void *	data
	)

Definition at line 180 of file netsock.c.

References ast_log(), ast_netsock_bindaddr(), ast_strdupa, host, list, LOG_WARNING, portno, and strsep().

Referenced by peer_set_srcaddr(), and set_config().

{
   struct sockaddr_in sin;
   char *tmp;
   char *host;
   char *port;
   int portno;

   memset(&sin, 0, sizeof(sin));
   sin.sin_family = AF_INET;
   sin.sin_port = htons(defaultport);
   tmp = ast_strdupa(bindinfo);
   if (!tmp) {
      ast_log(LOG_WARNING, "Out of memory!\n");
      return NULL;
   }

   host = strsep(&tmp, ":");
   port = tmp;

   if (port && ((portno = atoi(port)) > 0))
      sin.sin_port = htons(portno);

   inet_aton(host, &sin.sin_addr);

   return ast_netsock_bindaddr(list, ioc, &sin, tos, callback, data);
}

struct ast_netsock* ast_netsock_bindaddr	(	struct ast_netsock_list *	list,
		struct io_context *	ioc,
		struct sockaddr_in *	bindaddr,
		int	tos,
		ast_io_cb	callback,
		void *	data
	)

Definition at line 124 of file netsock.c.

References ast_enable_packet_fragmentation(), ast_inet_ntoa(), ast_io_add(), AST_IO_IN, ast_log(), ast_verbose(), ASTOBJ_CONTAINER_LINK, ASTOBJ_INIT, ast_netsock::bindaddr, ast_netsock::data, free, ast_netsock::ioc, ast_netsock::ioref, list, LOG_ERROR, LOG_WARNING, malloc, netsocket, option_verbose, ast_netsock::sockfd, and VERBOSE_PREFIX_2.

Referenced by ast_netsock_bind().

{
   int netsocket = -1;
   int *ioref;
   char iabuf[INET_ADDRSTRLEN];
   
   struct ast_netsock *ns;
   const int reuseFlag = 1;
   
   /* Make a UDP socket */
   netsocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
   
   if (netsocket < 0) {
      ast_log(LOG_ERROR, "Unable to create network socket: %s\n", strerror(errno));
      return NULL;
   }
   if (setsockopt(netsocket, SOL_SOCKET, SO_REUSEADDR, (char *)&reuseFlag, sizeof reuseFlag) < 0)
         ast_log(LOG_WARNING, "Error setting SO_REUSEADDR on sockfd '%d'\n", netsocket);
   if (bind(netsocket,(struct sockaddr *)bindaddr, sizeof(struct sockaddr_in))) {
      ast_log(LOG_ERROR, "Unable to bind to %s port %d: %s\n", ast_inet_ntoa(iabuf, sizeof(iabuf), bindaddr->sin_addr), ntohs(bindaddr->sin_port), strerror(errno));
      close(netsocket);
      return NULL;
   }
   if (option_verbose > 1)
      ast_verbose(VERBOSE_PREFIX_2 "Using TOS bits %d\n", tos);

   if (setsockopt(netsocket, IPPROTO_IP, IP_TOS, &tos, sizeof(tos))) 
      ast_log(LOG_WARNING, "Unable to set TOS to %d\n", tos);

   ast_enable_packet_fragmentation(netsocket);

   ns = malloc(sizeof(struct ast_netsock));
   if (ns) {
      /* Establish I/O callback for socket read */
      ioref = ast_io_add(ioc, netsocket, callback, AST_IO_IN, ns);
      if (!ioref) {
         ast_log(LOG_WARNING, "Out of memory!\n");
         close(netsocket);
         free(ns);
         return NULL;
      }  
      ASTOBJ_INIT(ns);
      ns->ioref = ioref;
      ns->ioc = ioc;
      ns->sockfd = netsocket;
      ns->data = data;
      memcpy(&ns->bindaddr, bindaddr, sizeof(ns->bindaddr));
      ASTOBJ_CONTAINER_LINK(list, ns);
   } else {
      ast_log(LOG_WARNING, "Out of memory!\n");
      close(netsocket);
   }

   return ns;
}

struct sockaddr_in* ast_netsock_boundaddr

(

const struct ast_netsock *

ns

)

Definition at line 213 of file netsock.c.

References ast_netsock::bindaddr.

{
   return &(ns->bindaddr);
}

void* ast_netsock_data

(

const struct ast_netsock *

ns

)

Definition at line 218 of file netsock.c.

References ast_netsock::data.

{
   return ns->data;
}

static void ast_netsock_destroy

(

struct ast_netsock *

netsock

)

[static]

Definition at line 77 of file netsock.c.

References ast_io_remove(), free, ast_netsock_list::ioc, and netsock.

Referenced by ast_netsock_release(), and ast_netsock_unref().

{
   ast_io_remove(netsock->ioc, netsock->ioref);
   close(netsock->sockfd);
   free(netsock);
}

struct ast_netsock* ast_netsock_find	(	struct ast_netsock_list *	list,
		struct sockaddr_in *	sa
	)

Definition at line 109 of file netsock.c.

References ASTOBJ_CONTAINER_TRAVERSE, ASTOBJ_RDLOCK, ASTOBJ_UNLOCK, inaddrcmp(), and list.

Referenced by peer_set_srcaddr().

{
   struct ast_netsock *sock = NULL;

   ASTOBJ_CONTAINER_TRAVERSE(list, !sock, {
      ASTOBJ_RDLOCK(iterator);
      if (!inaddrcmp(&iterator->bindaddr, sa))
         sock = iterator;
      ASTOBJ_UNLOCK(iterator);
   });

   return sock;
}

int ast_netsock_init

(

struct ast_netsock_list *

list

)

Definition at line 93 of file netsock.c.

References ASTOBJ_CONTAINER_INIT, and list.

Referenced by load_module(), and set_config().

{
   memset(list, 0, sizeof(*list));
   ASTOBJ_CONTAINER_INIT(list);

   return 0;
}

struct ast_netsock_list* ast_netsock_list_alloc

(

void

)

Definition at line 84 of file netsock.c.

References calloc.

Referenced by load_module(), and set_config().

{
   struct ast_netsock_list *res;

   res = calloc(1, sizeof(*res));

   return res;
}

int ast_netsock_release

(

struct ast_netsock_list *

list

)

Definition at line 101 of file netsock.c.

References ast_netsock_destroy(), ASTOBJ_CONTAINER_DESTROY, ASTOBJ_CONTAINER_DESTROYALL, and list.

Referenced by __unload_module(), load_module(), and set_config().

{
   ASTOBJ_CONTAINER_DESTROYALL(list, ast_netsock_destroy);
   ASTOBJ_CONTAINER_DESTROY(list);

   return 0;
}

int ast_netsock_sockfd

(

const struct ast_netsock *

ns

)

Definition at line 208 of file netsock.c.

Referenced by peer_set_srcaddr(), and set_config().

{
   return ns ? ns-> sockfd : -1;
}

void ast_netsock_unref

(

struct ast_netsock *

ns

)

Definition at line 223 of file netsock.c.

References ast_netsock_destroy(), and ASTOBJ_UNREF.

Referenced by peer_set_srcaddr(), and set_config().

{
   ASTOBJ_UNREF(ns, ast_netsock_destroy);
}

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