Sat Aug 6 00:39:59 2011

Asterisk developer's documentation


netsock.c File Reference

Network socket handling. More...

#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 "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"

Go to the source code of this file.

Data Structures

struct  ast_netsock
struct  ast_netsock_list

Functions

ast_netsockast_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_netsockast_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_netsockast_netsock_find (struct ast_netsock_list *list, struct sockaddr_in *sa)
int ast_netsock_init (struct ast_netsock_list *list)
ast_netsock_listast_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)


Detailed Description

Network socket handling.

Author:
Kevin P. Fleming <kpfleming@digium.com>

Mark Spencer <markster@digium.com>

Definition in file netsock.c.


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 176 of file netsock.c.

References ast_netsock_bindaddr(), ast_strdupa, and portno.

Referenced by peer_set_srcaddr(), and set_config().

00177 {
00178    struct sockaddr_in sin;
00179    char *tmp;
00180    char *host;
00181    char *port;
00182    int portno;
00183 
00184    memset(&sin, 0, sizeof(sin));
00185    sin.sin_family = AF_INET;
00186    sin.sin_port = htons(defaultport);
00187    tmp = ast_strdupa(bindinfo);
00188 
00189    host = strsep(&tmp, ":");
00190    port = tmp;
00191 
00192    if (port && ((portno = atoi(port)) > 0))
00193       sin.sin_port = htons(portno);
00194 
00195    inet_aton(host, &sin.sin_addr);
00196 
00197    return ast_netsock_bindaddr(list, ioc, &sin, tos, callback, data);
00198 }

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 123 of file netsock.c.

References ast_calloc, 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, errno, free, ast_netsock::ioc, ast_netsock::ioref, LOG_ERROR, LOG_WARNING, netsocket, option_verbose, ast_netsock::sockfd, and VERBOSE_PREFIX_2.

Referenced by ast_netsock_bind().

00124 {
00125    int netsocket = -1;
00126    int *ioref;
00127    
00128    struct ast_netsock *ns;
00129    const int reuseFlag = 1;
00130    
00131    /* Make a UDP socket */
00132    netsocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
00133    
00134    if (netsocket < 0) {
00135       ast_log(LOG_ERROR, "Unable to create network socket: %s\n", strerror(errno));
00136       return NULL;
00137    }
00138    if (setsockopt(netsocket, SOL_SOCKET, SO_REUSEADDR, (char *)&reuseFlag, sizeof reuseFlag) < 0) {
00139          ast_log(LOG_WARNING, "Error setting SO_REUSEADDR on sockfd '%d'\n", netsocket);
00140    }
00141    if (bind(netsocket,(struct sockaddr *)bindaddr, sizeof(struct sockaddr_in))) {
00142       ast_log(LOG_ERROR, "Unable to bind to %s port %d: %s\n", ast_inet_ntoa(bindaddr->sin_addr), ntohs(bindaddr->sin_port), strerror(errno));
00143       close(netsocket);
00144       return NULL;
00145    }
00146    if (option_verbose > 1)
00147       ast_verbose(VERBOSE_PREFIX_2 "Using TOS bits %d\n", tos);
00148 
00149    if (setsockopt(netsocket, IPPROTO_IP, IP_TOS, &tos, sizeof(tos))) 
00150       ast_log(LOG_WARNING, "Unable to set TOS to %d\n", tos);
00151 
00152    ast_enable_packet_fragmentation(netsocket);
00153 
00154    if (!(ns = ast_calloc(1, sizeof(struct ast_netsock)))) {
00155       close(netsocket);
00156       return NULL;
00157    }
00158    
00159    /* Establish I/O callback for socket read */
00160    if (!(ioref = ast_io_add(ioc, netsocket, callback, AST_IO_IN, ns))) {
00161       close(netsocket);
00162       free(ns);
00163       return NULL;
00164    }  
00165    ASTOBJ_INIT(ns);
00166    ns->ioref = ioref;
00167    ns->ioc = ioc;
00168    ns->sockfd = netsocket;
00169    ns->data = data;
00170    memcpy(&ns->bindaddr, bindaddr, sizeof(ns->bindaddr));
00171    ASTOBJ_CONTAINER_LINK(list, ns);
00172 
00173    return ns;
00174 }

struct sockaddr_in* ast_netsock_boundaddr ( const struct ast_netsock ns  ) 

Definition at line 205 of file netsock.c.

References ast_netsock::bindaddr.

00206 {
00207    return &(ns->bindaddr);
00208 }

void* ast_netsock_data ( const struct ast_netsock ns  ) 

Definition at line 210 of file netsock.c.

References ast_netsock::data.

00211 {
00212    return ns->data;
00213 }

static void ast_netsock_destroy ( struct ast_netsock netsock  )  [static]

Definition at line 79 of file netsock.c.

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

Referenced by ast_netsock_release(), and ast_netsock_unref().

00080 {
00081    ast_io_remove(netsock->ioc, netsock->ioref);
00082    close(netsock->sockfd);
00083    free(netsock);
00084 }

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

Definition at line 108 of file netsock.c.

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

Referenced by peer_set_srcaddr().

00110 {
00111    struct ast_netsock *sock = NULL;
00112 
00113    ASTOBJ_CONTAINER_TRAVERSE(list, !sock, {
00114       ASTOBJ_RDLOCK(iterator);
00115       if (!inaddrcmp(&iterator->bindaddr, sa))
00116          sock = iterator;
00117       ASTOBJ_UNLOCK(iterator);
00118    });
00119 
00120    return sock;
00121 }

int ast_netsock_init ( struct ast_netsock_list list  ) 

Definition at line 91 of file netsock.c.

References ASTOBJ_CONTAINER_INIT.

Referenced by load_module(), and set_config().

00092 {
00093    memset(list, 0, sizeof(*list));
00094    ASTOBJ_CONTAINER_INIT(list);
00095 
00096    return 0;
00097 }

struct ast_netsock_list* ast_netsock_list_alloc ( void   ) 

Definition at line 86 of file netsock.c.

References ast_calloc.

Referenced by load_module(), and set_config().

00087 {
00088    return ast_calloc(1, sizeof(struct ast_netsock_list));
00089 }

int ast_netsock_release ( struct ast_netsock_list list  ) 

Definition at line 99 of file netsock.c.

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

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

00100 {
00101    ASTOBJ_CONTAINER_DESTROYALL(list, ast_netsock_destroy);
00102    ASTOBJ_CONTAINER_DESTROY(list);
00103    ast_free(list);
00104 
00105    return 0;
00106 }

int ast_netsock_sockfd ( const struct ast_netsock ns  ) 

Definition at line 200 of file netsock.c.

Referenced by peer_set_srcaddr(), and set_config().

00201 {
00202    return ns ? ns-> sockfd : -1;
00203 }

void ast_netsock_unref ( struct ast_netsock ns  ) 

Definition at line 215 of file netsock.c.

References ast_netsock_destroy(), and ASTOBJ_UNREF.

Referenced by peer_set_srcaddr(), and set_config().

00216 {
00217    ASTOBJ_UNREF(ns, ast_netsock_destroy);
00218 }


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