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/*
Weborf
Copyright (C) 2010 Salvo "LtWorf" Tomaselli
Weborf 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 3 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, see <http://www.gnu.org/licenses/>.
@author Salvo "LtWorf" Tomaselli <tiposchi@tiscali.it>
*/
#include "options.h"
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <syslog.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdlib.h>
#include "types.h"
#include "mynet.h"
extern weborf_configuration_t weborf_conf;
/**
* Creates the server socket and performs some setsockopt
* on it.
* */
int net_create_server_socket() {
int s;
int val;
//Creates the socket
#ifdef IPV6
s = socket(PF_INET6, SOCK_STREAM, 0);
#else
s = socket(PF_INET, SOCK_STREAM, 0);
#endif
/*
This futile system call is here just because a debian mantainer decided
that the default behavior must be to listen only to IPv6 connections
excluding IPv4 ones.
So this restores the logic and normal behavior of accepting connections
without being racist about the client's address.
*/
#ifdef IPV6
val=0;
setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&val, sizeof(val));
#endif
val = 1;
//Makes port reusable immediately after termination.
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0) {
perror("ruseaddr(any)");
syslog(LOG_ERR, "reuseaddr(any)");
#ifdef IPV6
char *suggestion = "If you don't have IPv6 support in kernel, try recompiling weborf, removing the line '#define IPV6' from options.h\n";
write(2, suggestion, strlen(suggestion));
#endif
return -1;
}
return s;
}
void net_bind_and_listen(int s) {
#ifdef IPV6
struct sockaddr_in6 locAddr; //Local and remote address
//socklen_t ipAddrL = sizeof(struct sockaddr_in6);
#else
struct sockaddr_in locAddr;
int ipAddrL = sizeof(struct sockaddr_in);
#endif
#ifdef IPV6
//Bind
memset(&locAddr, 0, sizeof(locAddr));
locAddr.sin6_family = AF_INET6;
locAddr.sin6_port = htons(strtol(weborf_conf.port, NULL, 0));
if (weborf_conf.ip == NULL) { //Default ip, listens to all the interfaces
locAddr.sin6_addr = in6addr_any;
} else { //Custom ip
if (inet_pton(AF_INET6, weborf_conf.ip, &locAddr.sin6_addr) == 0) {
printf("Invalid IP address: %s\n", weborf_conf.ip);
exit(2);
}
}
if (bind(s, (struct sockaddr *) &locAddr, sizeof(locAddr)) < 0) {
perror("trying to bind");
#ifdef SOCKETDBG
syslog(LOG_ERR, "Port %d already in use",
ntohs(locAddr.sin6_port));
#endif
exit(3);
}
#else
//Prepares socket's address
locAddr.sin_family = AF_INET; //Internet socket
{
//Check the validity of port param and uses it
unsigned int p = strtol(weborf_conf.port, NULL, 0);
if (p < 1 || p > 65535) {
printf("Invalid port number: %d\n", p);
exit(4);
}
locAddr.sin_port = htons(p);
}
if (weborf_conf.ip == NULL)
weborf_conf.ip = "0.0.0.0"; //Default ip address
if (inet_aton(weborf_conf.ip, &locAddr.sin_addr) == 0) { //Converts ip to listen in binary format
printf("Invalid IP address: %s\n", weborf_conf.ip);
exit(2);
}
#ifdef SOCKETDBG
syslog(LOG_INFO, "Listening on address: %s:%d",
inet_ntoa(locAddr.sin_addr), ntohs(locAddr.sin_port));
#endif
//Bind
if (bind(s, (struct sockaddr *) &locAddr, ipAddrL) == -1) {
perror("trying to bind");
#ifdef SOCKETDBG
syslog(LOG_ERR, "Port %d already in use", ntohs(locAddr.sin_port));
#endif
exit(3);
}
#endif
listen(s, MAXQ); //Listen to the socket
}
void net_getpeername(int socket,char* buffer) {
#ifdef IPV6
struct sockaddr_storage t_addr;
socklen_t addr_l=sizeof(t_addr);
getpeername(socket, (struct sockaddr *)&t_addr, &addr_l);
if (t_addr.ss_family==AF_INET) {
struct sockaddr_in *addr =(struct sockaddr_in *)&t_addr;
char temp_buffer[INET_ADDRSTRLEN];
inet_ntop(AF_INET, &(addr->sin_addr), temp_buffer, INET_ADDRSTRLEN);
snprintf(buffer,INET6_ADDRSTRLEN,"::ffff:%s",temp_buffer);
} else {
struct sockaddr_in6 *addr =(struct sockaddr_in6 *)&t_addr;
inet_ntop(AF_INET6, &(addr->sin6_addr), buffer, INET6_ADDRSTRLEN);
}
#else
struct sockaddr_in addr;
socklen_t addr_l=sizeof(struct sockaddr_in);
getpeername(socket, (struct sockaddr *)&addr,&addr_l);
inet_ntop(AF_INET, &addr.sin_addr, buffer, INET_ADDRSTRLEN);
#endif
}
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