2004-02-24 00:41:20 +01:00
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/* the Music Player Daemon (MPD)
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2007-04-05 05:22:33 +02:00
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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2004-02-24 00:41:20 +01:00
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* This project's homepage is: http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "listen.h"
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#include "interface.h"
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#include "conf.h"
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#include "log.h"
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2004-05-15 23:19:43 +02:00
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#include "utils.h"
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2008-01-03 08:29:49 +01:00
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#include "os_compat.h"
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2004-02-24 00:41:20 +01:00
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#define MAXHOSTNAME 1024
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2005-03-06 20:00:58 +01:00
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#define ALLOW_REUSE 1
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#define DEFAULT_PORT 6600
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2004-02-24 00:41:20 +01:00
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2006-07-22 15:15:20 +02:00
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#define BINDERROR() do { \
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2007-05-26 20:15:54 +02:00
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FATAL("unable to bind port %u: %s\n" \
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"maybe MPD is still running?\n", \
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port, strerror(errno)); \
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2006-07-22 15:15:20 +02:00
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} while (0);
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2007-01-14 04:07:53 +01:00
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static int *listenSockets;
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static int numberOfListenSockets;
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2007-06-01 19:44:03 +02:00
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int boundPort;
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2004-02-24 00:41:20 +01:00
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2007-09-05 03:19:37 +02:00
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/*
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* redirect stdin to /dev/null to work around a libao bug
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* there are likely other bugs in other libraries (and even our code!)
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* that check for fd > 0, so it's easiest to just keep
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* fd = 0 == /dev/null for now...
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*/
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static void redirect_stdin(void)
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{
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int fd, st;
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struct stat ss;
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if ((st = fstat(STDIN_FILENO, &ss)) < 0) {
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if ((fd = open("/dev/null", O_RDONLY) > 0)) {
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DEBUG("stdin closed, and could not open /dev/null "
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"as fd=0, some external library bugs "
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"may be exposed...\n");
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close(fd);
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}
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return;
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}
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if (!isatty(STDIN_FILENO))
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return;
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if ((fd = open("/dev/null", O_RDONLY)) < 0)
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FATAL("failed to open /dev/null %s\n", strerror(errno));
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if (dup2(fd, STDIN_FILENO) < 0)
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FATAL("dup2 stdin: %s\n", strerror(errno));
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}
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2008-04-12 06:07:11 +02:00
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static int establishListen(const struct sockaddr *addrp, socklen_t addrlen)
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2006-07-19 20:56:54 +02:00
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{
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2007-08-27 10:05:55 +02:00
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int pf;
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2004-02-24 00:41:20 +01:00
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int sock;
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2006-07-19 20:56:54 +02:00
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int allowReuse = ALLOW_REUSE;
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2006-07-20 18:02:40 +02:00
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switch (addrp->sa_family) {
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2008-04-12 06:07:24 +02:00
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#ifdef HAVE_TCP
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2006-07-19 20:56:54 +02:00
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case AF_INET:
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pf = PF_INET;
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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pf = PF_INET6;
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break;
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#endif
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2008-04-12 06:07:24 +02:00
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#endif /* HAVE_TCP */
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#ifdef HAVE_UN
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2006-07-19 20:56:54 +02:00
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case AF_UNIX:
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pf = PF_UNIX;
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break;
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2008-04-12 06:07:24 +02:00
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#endif /* HAVE_UN */
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2006-07-19 20:56:54 +02:00
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default:
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2007-05-26 20:15:54 +02:00
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FATAL("unknown address family: %i\n", addrp->sa_family);
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2006-07-19 20:56:54 +02:00
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}
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2007-05-26 20:15:54 +02:00
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if ((sock = socket(pf, SOCK_STREAM, 0)) < 0)
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FATAL("socket < 0\n");
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2006-07-19 20:56:54 +02:00
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2008-03-26 11:39:03 +01:00
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if (set_nonblocking(sock) < 0) {
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2007-05-26 20:15:54 +02:00
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FATAL("problems setting nonblocking on listen socket: %s\n",
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2006-07-20 18:02:40 +02:00
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strerror(errno));
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2006-07-19 20:56:54 +02:00
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}
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2006-07-20 18:02:40 +02:00
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if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&allowReuse,
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sizeof(allowReuse)) < 0) {
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2007-05-26 20:15:54 +02:00
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FATAL("problems setsockopt'ing: %s\n", strerror(errno));
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2006-07-19 20:56:54 +02:00
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}
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2006-07-20 18:02:40 +02:00
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if (bind(sock, addrp, addrlen) < 0) {
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2006-07-22 15:15:20 +02:00
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close(sock);
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return -1;
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2006-07-19 20:56:54 +02:00
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}
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2006-07-20 18:02:40 +02:00
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2007-05-26 20:15:54 +02:00
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if (listen(sock, 5) < 0)
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FATAL("problems listen'ing: %s\n", strerror(errno));
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2006-07-19 20:56:54 +02:00
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numberOfListenSockets++;
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2006-07-20 18:02:40 +02:00
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listenSockets =
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2006-08-26 08:25:57 +02:00
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xrealloc(listenSockets, sizeof(int) * numberOfListenSockets);
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2006-07-19 20:56:54 +02:00
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2006-07-20 18:02:40 +02:00
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listenSockets[numberOfListenSockets - 1] = sock;
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2006-07-22 15:15:20 +02:00
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return 0;
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2006-07-19 20:56:54 +02:00
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}
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2006-07-20 18:02:40 +02:00
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static void parseListenConfigParam(unsigned int port, ConfigParam * param)
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{
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2008-04-12 06:07:11 +02:00
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const struct sockaddr *addrp;
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2007-08-27 10:05:55 +02:00
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socklen_t addrlen;
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2008-04-12 06:07:24 +02:00
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#ifdef HAVE_TCP
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2008-02-05 11:20:46 +01:00
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struct sockaddr_in sin4;
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2004-02-24 00:41:20 +01:00
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#ifdef HAVE_IPV6
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struct sockaddr_in6 sin6;
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2006-07-22 19:19:59 +02:00
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int useIpv6 = ipv6Supported();
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2004-02-24 00:41:20 +01:00
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memset(&sin6, 0, sizeof(struct sockaddr_in6));
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sin6.sin6_port = htons(port);
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sin6.sin6_family = AF_INET6;
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#endif
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2008-02-05 11:20:46 +01:00
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memset(&sin4, 0, sizeof(struct sockaddr_in));
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sin4.sin_port = htons(port);
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sin4.sin_family = AF_INET;
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2008-04-12 06:07:24 +02:00
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#endif /* HAVE_TCP */
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2004-10-28 07:14:55 +02:00
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2006-07-20 18:02:40 +02:00
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if (!param || 0 == strcmp(param->value, "any")) {
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2008-04-12 06:07:24 +02:00
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#ifdef HAVE_TCP
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2004-11-03 20:42:54 +01:00
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DEBUG("binding to any address\n");
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2006-07-22 19:19:59 +02:00
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#ifdef HAVE_IPV6
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if (useIpv6) {
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sin6.sin6_addr = in6addr_any;
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2008-04-12 06:07:11 +02:00
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addrp = (const struct sockaddr *)&sin6;
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2006-07-22 19:19:59 +02:00
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addrlen = sizeof(struct sockaddr_in6);
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2008-04-12 06:07:06 +02:00
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if (establishListen(addrp, addrlen) < 0)
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2006-07-22 19:19:59 +02:00
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BINDERROR();
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}
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#endif
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2008-02-05 11:20:46 +01:00
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sin4.sin_addr.s_addr = INADDR_ANY;
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2008-04-12 06:07:11 +02:00
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addrp = (const struct sockaddr *)&sin4;
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2006-07-22 15:15:20 +02:00
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addrlen = sizeof(struct sockaddr_in);
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2006-07-22 19:19:59 +02:00
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#ifdef HAVE_IPV6
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2008-04-12 06:07:06 +02:00
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if ((establishListen(addrp, addrlen) < 0) && !useIpv6) {
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2006-07-22 19:19:59 +02:00
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#else
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2008-04-12 06:07:06 +02:00
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if (establishListen(addrp, addrlen) < 0) {
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2006-07-22 19:19:59 +02:00
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#endif
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2006-07-22 15:15:20 +02:00
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BINDERROR();
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}
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2008-04-12 06:07:24 +02:00
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#else /* HAVE_TCP */
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FATAL("TCP support is disabled\n");
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#endif /* HAVE_TCP */
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#ifdef HAVE_UN
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2008-04-12 06:07:18 +02:00
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} else if (param->value[0] == '/') {
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size_t path_length;
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struct sockaddr_un sun;
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path_length = strlen(param->value);
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if (path_length >= sizeof(sun.sun_path))
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FATAL("unix socket path is too long\n");
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sun.sun_family = AF_UNIX;
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memcpy(sun.sun_path, param->value, path_length + 1);
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addrp = (const struct sockaddr *)&sun;
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addrlen = sizeof(sun);
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if (establishListen(addrp, addrlen) < 0)
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BINDERROR();
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2008-04-12 06:07:24 +02:00
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#endif /* HAVE_UN */
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2006-07-20 18:02:40 +02:00
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} else {
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2008-04-12 06:07:24 +02:00
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#ifdef HAVE_TCP
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2006-07-20 18:02:40 +02:00
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struct hostent *he;
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2004-11-03 20:42:54 +01:00
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DEBUG("binding to address for %s\n", param->value);
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2006-07-20 18:02:40 +02:00
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if (!(he = gethostbyname(param->value))) {
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2007-05-26 20:15:54 +02:00
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FATAL("can't lookup host \"%s\" at line %i\n",
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2006-07-20 18:02:40 +02:00
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param->value, param->line);
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2004-02-24 00:41:20 +01:00
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}
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2006-07-20 18:02:40 +02:00
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switch (he->h_addrtype) {
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2004-02-24 00:41:20 +01:00
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#ifdef HAVE_IPV6
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case AF_INET6:
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2006-07-22 19:19:59 +02:00
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if (!useIpv6) {
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2007-05-26 20:15:54 +02:00
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FATAL("no IPv6 support, but a IPv6 address "
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2006-07-20 18:02:40 +02:00
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"found for \"%s\" at line %i\n",
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param->value, param->line);
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2004-02-24 00:41:20 +01:00
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}
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2006-08-01 06:18:37 +02:00
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memcpy((char *)&sin6.sin6_addr.s6_addr,
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2008-04-12 06:07:11 +02:00
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(const char *)he->h_addr, he->h_length);
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addrp = (const struct sockaddr *)&sin6;
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2004-02-24 00:41:20 +01:00
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addrlen = sizeof(struct sockaddr_in6);
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break;
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#endif
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case AF_INET:
|
2008-02-05 11:20:46 +01:00
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memcpy((char *)&sin4.sin_addr.s_addr,
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2008-04-12 06:07:11 +02:00
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(const char *)he->h_addr, he->h_length);
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2008-02-05 11:20:46 +01:00
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addrp = (struct sockaddr *)&sin4;
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2004-02-24 00:41:20 +01:00
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addrlen = sizeof(struct sockaddr_in);
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break;
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default:
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2007-05-26 20:15:54 +02:00
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FATAL("address type for \"%s\" is not IPv4 or IPv6 "
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2006-07-20 18:02:40 +02:00
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"at line %i\n", param->value, param->line);
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2004-02-24 00:41:20 +01:00
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}
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2008-04-12 06:07:06 +02:00
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if (establishListen(addrp, addrlen) < 0)
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2006-07-22 15:15:20 +02:00
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BINDERROR();
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2008-04-12 06:07:24 +02:00
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#else /* HAVE_TCP */
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FATAL("TCP support is disabled\n");
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#endif /* HAVE_TCP */
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2004-02-24 00:41:20 +01:00
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}
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}
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2006-07-20 18:02:40 +02:00
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void listenOnPort(void)
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{
|
2005-03-06 20:00:58 +01:00
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int port = DEFAULT_PORT;
|
2006-07-20 18:02:40 +02:00
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ConfigParam *param = getNextConfigParam(CONF_BIND_TO_ADDRESS, NULL);
|
2007-02-28 13:34:36 +01:00
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ConfigParam *portParam = getConfigParam(CONF_PORT);
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if (portParam) {
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char *test;
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port = strtol(portParam->value, &test, 10);
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if (port <= 0 || *test != '\0') {
|
2007-05-26 20:15:54 +02:00
|
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FATAL("%s \"%s\" specified at line %i is not a "
|
2007-02-28 13:34:36 +01:00
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"positive integer", CONF_PORT,
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portParam->value, portParam->line);
|
2005-03-06 20:00:58 +01:00
|
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}
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}
|
2004-11-03 20:42:54 +01:00
|
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|
2007-01-11 21:41:17 +01:00
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boundPort = port;
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|
2007-09-05 03:19:37 +02:00
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redirect_stdin();
|
2004-11-03 20:42:54 +01:00
|
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do {
|
2006-07-20 18:02:40 +02:00
|
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parseListenConfigParam(port, param);
|
2004-11-03 20:42:54 +01:00
|
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} while ((param = getNextConfigParam(CONF_BIND_TO_ADDRESS, param)));
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}
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|
2006-07-20 18:02:40 +02:00
|
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|
void addListenSocketsToFdSet(fd_set * fds, int *fdmax)
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|
|
|
{
|
2004-11-03 20:42:54 +01:00
|
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int i;
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|
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|
2006-07-20 18:02:40 +02:00
|
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|
for (i = 0; i < numberOfListenSockets; i++) {
|
2004-11-03 20:42:54 +01:00
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FD_SET(listenSockets[i], fds);
|
2006-07-20 18:02:40 +02:00
|
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if (listenSockets[i] > *fdmax)
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|
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*fdmax = listenSockets[i];
|
2004-11-03 20:42:54 +01:00
|
|
|
}
|
|
|
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}
|
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
void closeAllListenSockets(void)
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|
|
|
{
|
2004-11-03 20:42:54 +01:00
|
|
|
int i;
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|
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|
|
DEBUG("closeAllListenSockets called\n");
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|
2006-07-20 18:02:40 +02:00
|
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|
for (i = 0; i < numberOfListenSockets; i++) {
|
2005-03-19 13:39:50 +01:00
|
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|
DEBUG("closing listen socket %i\n", i);
|
2006-07-20 18:02:40 +02:00
|
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|
while (close(listenSockets[i]) < 0 && errno == EINTR) ;
|
2004-11-03 20:42:54 +01:00
|
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|
}
|
2005-11-16 15:43:04 +01:00
|
|
|
freeAllListenSockets();
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|
|
|
}
|
2004-11-03 20:42:54 +01:00
|
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|
2006-07-20 18:02:40 +02:00
|
|
|
void freeAllListenSockets(void)
|
|
|
|
{
|
2004-11-03 20:42:54 +01:00
|
|
|
numberOfListenSockets = 0;
|
|
|
|
free(listenSockets);
|
|
|
|
listenSockets = NULL;
|
|
|
|
}
|
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
void getConnections(fd_set * fds)
|
|
|
|
{
|
2004-11-03 20:42:54 +01:00
|
|
|
int i;
|
2004-02-24 00:41:20 +01:00
|
|
|
int fd = 0;
|
|
|
|
struct sockaddr sockAddr;
|
|
|
|
socklen_t socklen = sizeof(sockAddr);
|
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
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");
|
2004-11-03 20:42:54 +01:00
|
|
|
}
|
|
|
|
}
|
2004-02-24 00:41:20 +01:00
|
|
|
}
|
|
|
|
}
|