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Clean up and comment listen_socket().

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This commit is contained in:
Nicholas J. Kain 2010-11-14 00:46:02 -05:00
parent 86ef084835
commit 1cc648b5ad
1 changed files with 7 additions and 6 deletions
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13
ndhc/socket.c
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@ -89,6 +89,8 @@ int read_interface(char *interface, int *ifindex, uint32_t *addr, uint8_t *mac)
return ret;
}
/* Returns fd of new listen socket bound to @ip:@port on interface @inf
* on success, or -1 on failure. */
int listen_socket(unsigned int ip, int port, char *inf)
{
struct ifreq interface;
@ -98,15 +100,10 @@ int listen_socket(unsigned int ip, int port, char *inf)
log_line("Opening listen socket on 0x%08x:%d %s", ip, port, inf);
if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
log_error("socket call failed: %s", strerror(errno));
log_error("listen_socket: socket failed: %s", strerror(errno));
goto out;
}
memset(&addr, 0, sizeof addr);
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = ip;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof opt) == -1)
goto out_fd;
if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &opt, sizeof opt) == -1)
@ -118,6 +115,10 @@ int listen_socket(unsigned int ip, int port, char *inf)
&interface, sizeof interface) < 0)
goto out_fd;
memset(&addr, 0, sizeof addr);
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = ip;
if (bind(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) == -1)
goto out_fd;