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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.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 "listen.h"
#include "interface.h"
#include "conf.h"
#include "log.h"
#include "utils.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <netdb.h>
#include <string.h>
#include <errno.h>
#include <resolv.h>
#include <fcntl.h>
#define MAXHOSTNAME 1024
#define ALLOW_REUSE 1
#define DEFAULT_PORT 6600
#define BINDERROR() do { \
FATAL("unable to bind port %u: %s\n" \
"maybe MPD is still running?\n", \
port, strerror(errno)); \
} while (0);
static int *listenSockets;
static int numberOfListenSockets;
int boundPort;
static int establishListen(unsigned int port,
struct sockaddr *addrp, socklen_t addrlen)
{
int pf;
int sock;
int allowReuse = ALLOW_REUSE;
switch (addrp->sa_family) {
case AF_INET:
pf = PF_INET;
break;
#ifdef HAVE_IPV6
case AF_INET6:
pf = PF_INET6;
break;
#endif
case AF_UNIX:
pf = PF_UNIX;
break;
default:
FATAL("unknown address family: %i\n", addrp->sa_family);
}
if ((sock = socket(pf, SOCK_STREAM, 0)) < 0)
FATAL("socket < 0\n");
if (fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_NONBLOCK) < 0) {
FATAL("problems setting nonblocking on listen socket: %s\n",
strerror(errno));
}
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&allowReuse,
sizeof(allowReuse)) < 0) {
FATAL("problems setsockopt'ing: %s\n", strerror(errno));
}
if (bind(sock, addrp, addrlen) < 0) {
close(sock);
return -1;
}
if (listen(sock, 5) < 0)
FATAL("problems listen'ing: %s\n", strerror(errno));
numberOfListenSockets++;
listenSockets =
xrealloc(listenSockets, sizeof(int) * numberOfListenSockets);
listenSockets[numberOfListenSockets - 1] = sock;
return 0;
}
static void parseListenConfigParam(unsigned int port, ConfigParam * param)
{
struct sockaddr *addrp;
socklen_t addrlen;
struct sockaddr_in sin;
#ifdef HAVE_IPV6
struct sockaddr_in6 sin6;
int useIpv6 = ipv6Supported();
memset(&sin6, 0, sizeof(struct sockaddr_in6));
sin6.sin6_port = htons(port);
sin6.sin6_family = AF_INET6;
#endif
memset(&sin, 0, sizeof(struct sockaddr_in));
sin.sin_port = htons(port);
sin.sin_family = AF_INET;
if (!param || 0 == strcmp(param->value, "any")) {
DEBUG("binding to any address\n");
#ifdef HAVE_IPV6
if (useIpv6) {
sin6.sin6_addr = in6addr_any;
addrp = (struct sockaddr *)&sin6;
addrlen = sizeof(struct sockaddr_in6);
if (establishListen(port, addrp, addrlen) < 0)
BINDERROR();
}
#endif
sin.sin_addr.s_addr = INADDR_ANY;
addrp = (struct sockaddr *)&sin;
addrlen = sizeof(struct sockaddr_in);
#ifdef HAVE_IPV6
if ((establishListen(port, addrp, addrlen) < 0) && !useIpv6) {
#else
if (establishListen(port, addrp, addrlen) < 0) {
#endif
BINDERROR();
}
} else {
struct hostent *he;
DEBUG("binding to address for %s\n", param->value);
if (!(he = gethostbyname(param->value))) {
FATAL("can't lookup host \"%s\" at line %i\n",
param->value, param->line);
}
switch (he->h_addrtype) {
#ifdef HAVE_IPV6
case AF_INET6:
if (!useIpv6) {
FATAL("no IPv6 support, but a IPv6 address "
"found for \"%s\" at line %i\n",
param->value, param->line);
}
memcpy((char *)&sin6.sin6_addr.s6_addr,
(char *)he->h_addr, he->h_length);
addrp = (struct sockaddr *)&sin6;
addrlen = sizeof(struct sockaddr_in6);
break;
#endif
case AF_INET:
memcpy((char *)&sin.sin_addr.s_addr,
(char *)he->h_addr, he->h_length);
addrp = (struct sockaddr *)&sin;
addrlen = sizeof(struct sockaddr_in);
break;
default:
FATAL("address type for \"%s\" is not IPv4 or IPv6 "
"at line %i\n", param->value, param->line);
}
if (establishListen(port, addrp, addrlen) < 0)
BINDERROR();
}
}
void listenOnPort(void)
{
int port = DEFAULT_PORT;
ConfigParam *param = getNextConfigParam(CONF_BIND_TO_ADDRESS, NULL);
ConfigParam *portParam = getConfigParam(CONF_PORT);
if (portParam) {
char *test;
port = strtol(portParam->value, &test, 10);
if (port <= 0 || *test != '\0') {
FATAL("%s \"%s\" specified at line %i is not a "
"positive integer", CONF_PORT,
portParam->value, portParam->line);
}
}
boundPort = port;
do {
parseListenConfigParam(port, param);
} while ((param = getNextConfigParam(CONF_BIND_TO_ADDRESS, param)));
}
void addListenSocketsToFdSet(fd_set * fds, int *fdmax)
{
int i;
for (i = 0; i < numberOfListenSockets; i++) {
FD_SET(listenSockets[i], fds);
if (listenSockets[i] > *fdmax)
*fdmax = listenSockets[i];
}
}
void closeAllListenSockets(void)
{
int i;
DEBUG("closeAllListenSockets called\n");
for (i = 0; i < numberOfListenSockets; i++) {
DEBUG("closing listen socket %i\n", i);
while (close(listenSockets[i]) < 0 && errno == EINTR) ;
}
freeAllListenSockets();
}
void freeAllListenSockets(void)
{
numberOfListenSockets = 0;
free(listenSockets);
listenSockets = NULL;
}
void getConnections(fd_set * fds)
{
int i;
int fd = 0;
struct sockaddr sockAddr;
socklen_t socklen = sizeof(sockAddr);
for (i = 0; i < numberOfListenSockets; i++) {
if (FD_ISSET(listenSockets[i], fds)) {
if ((fd = accept(listenSockets[i], &sockAddr, &socklen))
>= 0) {
openAInterface(fd, &sockAddr);
} else if (fd < 0
&& (errno != EAGAIN && errno != EINTR)) {
ERROR("Problems accept()'ing\n");
}
}
}
}
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