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/* SPDX-License-Identifier: BSD-3-Clause */
/*
* Copyright © 2020 rsiddharth <s@ricketyspace.net>
*/
#include <nsocket.h>
int get_socket()
{
int sockfd = 0;
int rc = 0;
int y = 1;
struct addrinfo hints;
struct addrinfo *servinfo = NULL;
struct addrinfo *addr = NULL;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
rc = getaddrinfo(NULL, PORT, &hints, &servinfo);
check(rc == 0, "get_socket: getaddrinfo failed");
// Loop through the addresses and find one that works.
for (addr = servinfo; addr != NULL; sockfd = 0,
addr = addr->ai_next) {
sockfd = socket(addr->ai_family, addr->ai_socktype,
addr->ai_protocol);
if (sockfd < 1) {
continue;
}
// dodge the "address already in use" error.
rc = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
&y, sizeof(int));
if (rc != 0) {
continue;
}
// assign name to socket.
rc = bind(sockfd, addr->ai_addr, addr->ai_addrlen);
if (rc != 0) {
continue;
}
break;
}
check(sockfd > 0, "unable to get socket");
// Cleanup.
freeaddrinfo(servinfo);
return sockfd;
error:
if (servinfo)
freeaddrinfo(servinfo);
return -1;
}
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