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/**
* @file sock.c
* @note Copyright (C) 2020 Richard Cochran <richardcochran@gmail.com>
* @note SPDX-License-Identifier: GPL-2.0+
*/
#include <netdb.h>
#include <netinet/tcp.h>
#include <string.h>
#include <unistd.h>
#include "print.h"
#include "sock.h"
typedef void *so_t;
int sock_open(const char *server, const char *port)
{
int i, err, family[2] = { AF_INET, AF_INET6 }, fd;
struct addrinfo hints, *result = NULL;
socklen_t addrlen;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_socktype = SOCK_STREAM;
for (i = 0; i < 2; i++) {
hints.ai_family = family[i];
err = getaddrinfo(server, port, &hints, &result);
if (err) {
pr_debug("%s: getaddrinfo failed family %d: %s",
__func__, hints.ai_family, gai_strerror(err));
result = NULL;
} else {
break;
}
}
if (!result) {
return -1;
}
addrlen = (socklen_t) result->ai_addrlen;
pr_debug("%s: connecting to server %s canonical %s",
__func__, server, result->ai_canonname);
fd = socket(result->ai_family, SOCK_STREAM, result->ai_protocol);
if (fd < 0) {
pr_err("%s: socket failed: %m", __func__);
goto failed;
}
if (connect(fd, result->ai_addr, addrlen) < 0) {
pr_err("%s: connect failed: %m", __func__);
close(fd);
fd = -1;
}
failed:
freeaddrinfo(result);
return fd;
}
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