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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Author: Jim Faulkner <newspost@sdf.lonestar.org>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "socket.h"
#include "../ui/ui.h"
int sockfd;
/**
*** Public Routines
**/
int socket_create(const char *address, int port) {
struct sigaction act, oact; /* used to prevent a crash in
case of a dead socket */
/* use these to make the socket to the host */
struct sockaddr_in serv_addr;
struct in_addr inaddr;
int on;
struct hostent *hp;
#if (defined(sun) || defined(__sun)) && (defined(__svr4) || \
defined(__SVR4) || defined(__svr4__))
unsigned long tinaddr;
#endif
sockfd = -1;
memset ( &serv_addr, 0, sizeof(serv_addr) );
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(port);
/* Try to convert host name as dotted decimal */
#if (defined(sun) || defined(__sun)) && (defined(__svr4) || \
defined(__SVR4) || defined(__svr4__))
tinaddr = inet_addr(address);
if ( tinaddr != -1 )
#else
if ( inet_aton(address, &inaddr) != 0 )
#endif
{
memcpy(&serv_addr.sin_addr, &inaddr, sizeof(inaddr));
}
else /* If that failed, then look up the host name */
{
if (NULL == (hp = gethostbyname(address)))
return FAILED_TO_RESOLVE_HOST;
memcpy(&serv_addr.sin_addr, hp->h_addr, hp->h_length);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
return FAILED_TO_CREATE_SOCKET;
if (connect(sockfd, (struct sockaddr*) &serv_addr,
sizeof(serv_addr)) < 0) {
close (sockfd);
return FAILED_TO_CREATE_SOCKET;
}
on = 1;
if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE,
(char*) &on, sizeof(on)) < 0) {
close(sockfd);
return FAILED_TO_CREATE_SOCKET;
}
/* If we write() to a dead socket, then let write return
* EPIPE rather than crashing the program. */
act.sa_handler = SIG_IGN;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
sigaction(SIGPIPE, &act, &oact);
return 0;
}
void socket_close() {
if (sockfd >= 0)
close(sockfd);
}
/* returns the number of bytes written */
long socket_write(const char *buffer, long length) {
long retval;
retval = write(sockfd, buffer, length);
if(retval < 0){
ui_socket_error(errno);
return retval; /* never happens */
}
else{
return retval;
}
}
/* returns the number of bytes read */
long socket_getline(char *buffer) {
long retval;
char *pi;
long i;
long read_count = 0;
i = 0;
pi = buffer;
while (read_count < STRING_BUFSIZE - 1) {
retval = read(sockfd, pi, 1);
if(retval < 0)
ui_socket_error(errno);
read_count += retval;
pi++;
if (buffer[i] == '\n')
break;
i++;
}
*pi = '\0';
return read_count;
}
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