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/* net.c --
* Created: Fri Feb 21 20:58:10 1997 by faith@dict.org
* Copyright 1997, 1998, 1999, 2000, 2002 Rickard E. Faith (faith@dict.org)
* Copyright 2002-2008 Aleksey Cheusov (vle@gmx.net)
*
* 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 1, 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "dictP.h"
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <fcntl.h>
#include "dictd.h"
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
#ifndef INADDR_NONE
#define INADDR_NONE (-1)
#endif
const char *inet_ntopW (struct sockaddr *sa) {
static char buf[40];
switch (sa->sa_family) {
case AF_INET:
return inet_ntop (sa->sa_family, &(((struct sockaddr_in *)sa)->sin_addr), buf, sizeof(buf));
case AF_INET6:
return inet_ntop (sa->sa_family, &(((struct sockaddr_in6 *)sa)->sin6_addr), buf, sizeof(buf));
default:
errno = EAFNOSUPPORT;
return NULL;
}
}
const char *net_hostname( void )
{
static char hostname[128] = "";
int err;
if (!hostname[0]) {
if (err = gethostname(hostname, sizeof(hostname)), err != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(err));
exit(EXIT_FAILURE);
}
}
hostname[sizeof(hostname)-1] = '\0';
return hostname;
}
int net_connect_tcp( const char *host, const char *service, int address_family )
{
struct addrinfo *r = NULL;
struct addrinfo *rtmp = NULL;
struct addrinfo hints;
int s;
memset (&hints, 0, sizeof (struct addrinfo));
hints.ai_family = address_family;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_ADDRCONFIG;
if (getaddrinfo (host, service, &hints, &r) != 0) {
return NET_NOHOST;
}
for (rtmp = r; r != NULL; r = r->ai_next) {
s = socket (r->ai_family, r->ai_socktype, r->ai_protocol);
if (s < 0) {
if (r->ai_next != NULL)
continue;
err_fatal_errno( __FUNCTION__, "Can't open socket\n");
}
PRINTF(DBG_VERBOSE,("Trying %s (%s)...", host, inet_ntopW(r->ai_addr)));
if (connect (s, r->ai_addr, r->ai_addrlen) >= 0) {
PRINTF(DBG_VERBOSE,("Connected."));
freeaddrinfo (rtmp);
return s;
}
PRINTF(DBG_VERBOSE,("Failed: %s\n", strerror (errno)));
close (s);
}
freeaddrinfo (rtmp);
return NET_NOCONNECT;
}
int net_open_tcp (
const char *address,
const char *service,
int queueLength,
int address_family)
{
struct addrinfo hints, *r, *rtmp;
int s = -1;
int err;
memset (&hints, 0, sizeof (struct addrinfo));
hints.ai_family = address_family;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
if (getaddrinfo (address, service, &hints, &r) != 0)
err_fatal ( __FUNCTION__, "getaddrinfo: Failed, address = \"%s\", service = \"%s\"\n", address, service);
for (rtmp = r; r != NULL; r = r->ai_next) {
s = socket (r->ai_family, r->ai_socktype, r->ai_protocol);
if (s < 0) {
if (r->ai_next != NULL)
continue;
freeaddrinfo (rtmp);
err_fatal_errno (__FUNCTION__, "Can't open socket\n");
}
{
const int one = 1;
err = setsockopt (s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof (one));
if (err != 0){
err_fatal_errno (__FUNCTION__, "Can't setsockopt\n");
}
}
if (bind(s, r->ai_addr, r->ai_addrlen) < 0) {
if (r->ai_next != NULL) {
close (s);
continue;
}
freeaddrinfo (rtmp);
err_fatal_errno( __FUNCTION__, "Can't bind %s/tcp to %s\n",
service, address?address:"ANY" );
}
if (listen( s, queueLength ) < 0) {
if (r->ai_next != NULL) {
close (s);
continue;
}
freeaddrinfo (rtmp);
err_fatal_errno( __FUNCTION__, "Can't listen to %s/tcp on %s\n",
service, address );
}
break;
}
freeaddrinfo (rtmp);
return s;
}
int net_read( int s, char *buf, int maxlen )
{
int len;
int n = 0;
char c;
char *pt = buf;
*pt = '\0';
for (len = 0; len < maxlen && (n = read( s, &c, 1 )) > 0; /*void*/) {
switch (c) {
case '\n': *pt = '\0'; return len;
case '\r': break;
default: *pt++ = c; ++len; break;
}
}
*pt = '\0';
if (!n) return len ? len : EOF;
return n; /* error code */
}
int net_write( int s, const char *buf, int len )
{
int left = len;
int count;
while (left) {
if ((count = write(s, buf, left)) != left) {
if (count <= 0) return count; /* error code */
}
left -= count;
}
return len;
}
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