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tcp_listen.lc
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/* include tcp_listen */
#include "unp.h"## 1 ##src/lib/tcp_listen.c##
int## 2 ##src/lib/tcp_listen.c##
tcp_listen(const char *host, const char *serv, socklen_t *addrlenp)## 3 ##src/lib/tcp_listen.c##
{## 4 ##src/lib/tcp_listen.c##
int listenfd, n;## 5 ##src/lib/tcp_listen.c##
const int on = 1;## 6 ##src/lib/tcp_listen.c##
struct addrinfo hints, *res, *ressave;## 7 ##src/lib/tcp_listen.c##
bzero(&hints, sizeof(struct addrinfo));## 8 ##src/lib/tcp_listen.c##
hints.ai_flags = AI_PASSIVE;## 9 ##src/lib/tcp_listen.c##
hints.ai_family = AF_UNSPEC;## 10 ##src/lib/tcp_listen.c##
hints.ai_socktype = SOCK_STREAM;## 11 ##src/lib/tcp_listen.c##
if ((n = getaddrinfo(host, serv, &hints, &res)) != 0)## 12 ##src/lib/tcp_listen.c##
err_quit("tcp_listen error for %s, %s: %s",## 13 ##src/lib/tcp_listen.c##
host, serv, gai_strerror(n));## 14 ##src/lib/tcp_listen.c##
ressave = res;## 15 ##src/lib/tcp_listen.c##
do {## 16 ##src/lib/tcp_listen.c##
listenfd =## 17 ##src/lib/tcp_listen.c##
socket(res->ai_family, res->ai_socktype, res->ai_protocol);## 18 ##src/lib/tcp_listen.c##
if (listenfd < 0)## 19 ##src/lib/tcp_listen.c##
continue; /* error, try next one */## 20 ##src/lib/tcp_listen.c##
Setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));## 21 ##src/lib/tcp_listen.c##
if (bind(listenfd, res->ai_addr, res->ai_addrlen) == 0)## 22 ##src/lib/tcp_listen.c##
break; /* success */## 23 ##src/lib/tcp_listen.c##
Close(listenfd); /* bind error, close and try next one */## 24 ##src/lib/tcp_listen.c##
} while ((res = res->ai_next) != NULL);## 25 ##src/lib/tcp_listen.c##
if (res == NULL) /* errno from final socket() or bind() */## 26 ##src/lib/tcp_listen.c##
err_sys("tcp_listen error for %s, %s", host, serv);## 27 ##src/lib/tcp_listen.c##
Listen(listenfd, LISTENQ);## 28 ##src/lib/tcp_listen.c##
if (addrlenp)## 29 ##src/lib/tcp_listen.c##
*addrlenp = res->ai_addrlen; /* return size of protocol address */## 30 ##src/lib/tcp_listen.c##
freeaddrinfo(ressave);## 31 ##src/lib/tcp_listen.c##
return (listenfd);## 32 ##src/lib/tcp_listen.c##
}## 33 ##src/lib/tcp_listen.c##
/* end tcp_listen */
/*## 34 ##src/lib/tcp_listen.c##
* We place the wrapper function here, not in wraplib.c, because some## 35 ##src/lib/tcp_listen.c##
* XTI programs need to include wraplib.c, and it also defines## 36 ##src/lib/tcp_listen.c##
* a Tcp_listen() function.## 37 ##src/lib/tcp_listen.c##
*/## 38 ##src/lib/tcp_listen.c##
int## 39 ##src/lib/tcp_listen.c##
Tcp_listen(const char *host, const char *serv, socklen_t *addrlenp)## 40 ##src/lib/tcp_listen.c##
{## 41 ##src/lib/tcp_listen.c##
return (tcp_listen(host, serv, addrlenp));## 42 ##src/lib/tcp_listen.c##
}## 43 ##src/lib/tcp_listen.c##