[asterisk-dev] SOCKET

[Sameer Tamsekar]

Hi,

Thanks for the tips.

Here are some references of Sockets i found in the code.
as i am planning to add tcp support to SIP channel i need to know which
sockets are used , why they are used and what are the types (tcp/udp) ?

For ast_socket :
in the function ast_makesocket()

00893    struct sockaddr_un sunaddr;
00894    int res;
00895    int x;
00896    uid_t uid = -1;
00897    gid_t gid = -1;
00898
00899    for (x = 0; x < AST_MAX_CONNECTS
<http://asterisk.org/doxygen/asterisk_8c.html#a2>; x++)
00900       consoles
<http://asterisk.org/doxygen/asterisk_8c.html#a24>[x].fd
<http://asterisk.org/doxygen/structconsole.html#o0> = -1;
00901    unlink(ast_config_AST_SOCKET
<http://asterisk.org/doxygen/asterisk_8c.html#a38>);

-> 00902    ast_socket
<http://asterisk.org/doxygen/asterisk_8c.html#a16> = socket(PF_LOCAL
<http://asterisk.org/doxygen/asterisk_8c.html#a1>, SOCK_STREAM, 0);

00903    if (ast_socket
<http://asterisk.org/doxygen/asterisk_8c.html#a16> < 0) {
00904       ast_log
<http://asterisk.org/doxygen/logger_8c.html#a45>(LOG_WARNING
<http://asterisk.org/doxygen/logger_8h.html#a15>, "Unable to create
control socket: %s\n", strerror(errno));
00905       return -1;
00906    }
00907    memset(&sunaddr, 0, sizeof(sunaddr));
00908    sunaddr.sun_family = AF_LOCAL
<http://asterisk.org/doxygen/asterisk_8c.html#a0>;
00909    ast_copy_string(sunaddr.sun_path, ast_config_AST_SOCKET
<http://asterisk.org/doxygen/asterisk_8c.html#a38>,
sizeof(sunaddr.sun_path));

-> 00910    res = bind(ast_socket
<http://asterisk.org/doxygen/asterisk_8c.html#a16>, (struct sockaddr
*)&sunaddr, sizeof(sunaddr));


For sipsock:
in function static int reload_config
<http://asterisk.org/doxygen/chan__h323_8c.html#a115>(enum
channelreloadreason <http://asterisk.org/doxygen/channel_8h.html#a175>
reason)
 if (sipsock <http://asterisk.org/doxygen/chan__sip_8c.html#a254> < 0) {
15831       sipsock
<http://asterisk.org/doxygen/chan__sip_8c.html#a254> = socket(AF_INET,
SOCK_DGRAM, 0);
15832       if (sipsock
<http://asterisk.org/doxygen/chan__sip_8c.html#a254> < 0) {
15833          ast_log
<http://asterisk.org/doxygen/logger_8c.html#a45>(LOG_WARNING
<http://asterisk.org/doxygen/logger_8h.html#a15>, "Unable to create
SIP socket: %s\n", strerror(errno));
15834       } else {

I don't know why are these separate sockets and 1 tcp and other udp?

Thanks in advance,

Sameer
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