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/*
* HardInfo - Displays System Information
* Copyright (C) 2003-2007 L. A. F. Pereira <l@tia.mat.br>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 or later.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <string.h>
#include <arpa/inet.h>
#include <errno.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <glib.h>
#include "socket.h"
Socket *sock_connect(gchar * host, gint port)
{
struct sockaddr_in server;
Socket *s;
int sock;
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock > 0) {
memset(&server, 0, sizeof(server));
server.sin_family = AF_INET;
inet_pton(AF_INET,host,&server.sin_addr.s_addr);
server.sin_port = htons(port);
if (connect(sock, (struct sockaddr *) (void *) &server, sizeof(server)) < 0) {
goto cleanup;
}
s = g_new0(Socket, 1);
s->sock = sock;
return s;
}
cleanup:
close(sock);
return NULL;
}
/* From: http://www.erlenstar.demon.co.uk/unix/faq_3.html#SEC26 */
static inline int __sock_is_ready(Socket * s, int mode)
{
int rc, fd = s->sock;
fd_set fds;
struct timeval tv;
FD_ZERO(&fds);
FD_SET(fd, &fds);
tv.tv_sec = tv.tv_usec = 0;
if (mode == 0) {
/* read */
rc = select(fd + 1, &fds, NULL, NULL, &tv);
} else {
/* write */
rc = select(fd + 1, NULL, &fds, NULL, &tv);
}
if (rc < 0)
return -1;
return FD_ISSET(fd, &fds) ? 1 : 0;
}
int sock_ready_to_read(Socket * s)
{
return __sock_is_ready(s, 0);
}
int sock_ready_to_write(Socket * s)
{
return __sock_is_ready(s, 1);
}
int sock_read(Socket * s, gchar * buffer, gint size)
{
if (size > 2 && sock_ready_to_read(s)) {
gint n;
n = read(s->sock, buffer, size - 1);
if (n > 0) {
buffer[n] = '\0';
} else {
return 0;
}
return n;
}
return 0;
}
int sock_write(Socket * s, gchar * str)
{
while (!sock_ready_to_write(s));
return write(s->sock, str, strlen(str));
}
void sock_close(Socket * s)
{
shutdown(s->sock, 2);
close(s->sock);
g_free(s);
}
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