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/*
* ffproxy (c) 2002, 2003 Niklas Olmes <niklas@noxa.de>
* http://faith.eu.org
*
* $Id: socket.c,v 2.1 2004/12/31 08:59:15 niklas Exp $
*
* 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., 675
* Mass Ave, Cambridge, MA 02139, USA.
*/
#include "configure.h"
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#include <stdio.h>
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#include <poll.h>
#include "req.h"
#include "cfg.h"
#include "print.h"
#include "request.h"
#include "dns.h"
#include "access.h"
#include "socket.h"
#define DFLT_PORT 8080
#ifndef INFTIM
#define INFTIM -1
#endif
void
open_socket(void)
{
extern struct cfg config;
struct sockaddr claddr;
struct addrinfo hints[2], *res;
struct clinfo *clinfo;
struct pollfd s[2];
socklen_t claddr_len;
pid_t pid;
void *foo;
char strport[6];
char *ip_add;
int st, cl, i;
int num_fd;
int isipv4;
if (config.bind_ipv4 && config.bind_ipv6) {
if (*config.ipv4 == '\0' && *config.ipv6 != '\0')
fatal("error: while binding port on ipv4 and ipv6, if option 'bind_ipv4_host' is set, bind_ipv6_host must be set too");
if (*config.ipv4 != '\0' && *config.ipv6 == '\0')
fatal("error: while binding port on ipv4 and ipv6, if option 'bind_ipv6_host' is set, bind_ipv4_host must be set too");
}
if (config.port == 0)
config.port = DFLT_PORT;
(void) snprintf(strport, sizeof(strport), "%d", config.port);
num_fd = 0;
if (config.bind_ipv4)
num_fd++;
if (config.bind_ipv6)
num_fd++;
if (config.bind_ipv4 && config.bind_ipv6
&& *config.ipv4 == '\0' && *config.ipv6 == '\0')
num_fd--;
i = 0;
(void) memset(s, 0, sizeof(s));
s[0].fd = s[1].fd = 0;
while (i < num_fd) {
(void) memset(&hints[i], 0, sizeof(struct addrinfo));
if (config.bind_ipv4 && config.bind_ipv6
&& *config.ipv4 == '\0' && *config.ipv6 == '\0')
hints[i].ai_family = PF_UNSPEC;
else if (i == 0 && config.bind_ipv4)
hints[i].ai_family = PF_INET;
else
hints[i].ai_family = PF_INET6;
hints[i].ai_socktype = SOCK_STREAM;
hints[i].ai_flags = AI_PASSIVE;
if (i == 0 && config.bind_ipv4) {
if (*config.ipv4 == '\0')
ip_add = NULL;
else
ip_add = config.ipv4;
} else {
if (*config.ipv6 == '\0')
ip_add = NULL;
else
ip_add = config.ipv6;
}
if (getaddrinfo(ip_add, strport, &hints[i], &res))
fatal("getaddrinfo() failed for (%s) %s", ip_add, (i == 0 && config.bind_ipv4) ? "IPv4" : "IPv6");
if ((s[i].fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) < 0) {
if (i == 1 || (config.ipv6 && !config.ipv4))
fatal("socket() failed for IPv6, perhaps your system does not support IPv6.\nTry -B or `bind_ipv6 no' to disable IPv6 binding.\nError message");
else
fatal("socket() failed for IPv4");
}
if (setsockopt(s[i].fd, SOL_SOCKET, SO_REUSEADDR, &foo, sizeof(foo)) != 0) {
(void) close(s[i].fd);
fatal("setsockopt() failed for (%s) %s", ip_add, (i == 0 && config.bind_ipv4) ? "IPv4" : "IPv6");
}
if (bind(s[i].fd, (struct sockaddr *) res->ai_addr, res->ai_addrlen) < 0) {
(void) close(s[i].fd);
fatal("bind() failed for (%s) %s", ip_add, (i == 0 && config.bind_ipv4) ? "IPv4" : "IPv6");
}
if (listen(s[i].fd, config.backlog) != 0) {
(void) close(s[i].fd);
fatal("listen() failed for (%s) %s",ip_add, (i == 0 && config.bind_ipv4) ? "IPv4" : "IPv6");
}
freeaddrinfo(res);
s[i].events = POLLIN;
i++;
}
if (config.bind_ipv4)
info("waiting for requests on %s port %d (IPv4)", *config.ipv4 ? config.ipv4 : "(any)", config.port);
if (config.bind_ipv6)
info("waiting for requests on %s port %d (IPv6)", *config.ipv6 ? config.ipv6 : "(any)", config.port);
claddr_len = sizeof(claddr);
config.ccount = 0;
cl = 0;
isipv4 = config.bind_ipv4;
for (;;) {
if (config.ccount >= config.childs) {
(void) usleep(50000);
continue;
}
if (num_fd == 2) {
i = poll(s, 2, INFTIM);
if (i < 1) {
continue;
} else {
if (s[0].revents == POLLIN) {
st = s[0].fd;
isipv4 = 1;
} else {
st = s[1].fd;
isipv4 = 0;
}
}
} else
st = s[0].fd;
if ((cl = accept(st, (struct sockaddr *) & claddr, &claddr_len)) == -1) {
DEBUG(("open_socket() => accept() failed"));
continue;
}
DEBUG(("open_socket() => connection, checking access"));
clinfo = identify(&claddr, (socklen_t) isipv4 ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6));
if (check_access(clinfo) != 0) {
DEBUG(("open_socket() => no access"));
if (config.logrequests)
info("connection attempt from (%s) [%s], ACCESS DENIED", clinfo->name, clinfo->ip);
free(clinfo);
(void) close(cl);
continue;
}
if (config.logrequests)
info("connection attempt from (%s) [%s], access granted", clinfo->name, clinfo->ip);
if ((pid = fork()) == -1) {
DEBUG(("open_socket() => fork() failed"));
free(clinfo);
(void) close(cl);
continue;
} else if (pid == 0) {
(void) close(s[0].fd);
if (num_fd == 2)
(void) close(s[1].fd);
setup_log_slave();
handle_request(cl, clinfo);
free(clinfo);
(void) close(cl);
exit(0);
} else {
free(clinfo);
config.ccount++;
(void) close(cl);
}
}
/* NOTREACHED */
}
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