93e68adc79
uninitialized variables and non-returning functions that return. Let's tell it to stfu. git-svn-id: https://svn.musicpd.org/mpd/trunk@6277 09075e82-0dd4-0310-85a5-a0d7c8717e4f
259 lines
6.2 KiB
C
259 lines
6.2 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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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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#include "utils.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <string.h>
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#include <errno.h>
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#include <resolv.h>
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#include <fcntl.h>
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#define MAXHOSTNAME 1024
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#define ALLOW_REUSE 1
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#define DEFAULT_PORT 6600
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#define BINDERROR() do { \
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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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} while (0);
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static int *listenSockets;
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static int numberOfListenSockets;
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static int boundPort;
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static int establishListen(unsigned int port,
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struct sockaddr *addrp, socklen_t addrlen)
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{
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int pf = 0;
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int sock;
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int allowReuse = ALLOW_REUSE;
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switch (addrp->sa_family) {
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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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case AF_UNIX:
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pf = PF_UNIX;
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break;
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default:
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FATAL("unknown address family: %i\n", addrp->sa_family);
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}
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if ((sock = socket(pf, SOCK_STREAM, 0)) < 0)
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FATAL("socket < 0\n");
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if (fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_NONBLOCK) < 0) {
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FATAL("problems setting nonblocking on listen socket: %s\n",
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strerror(errno));
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}
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if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&allowReuse,
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sizeof(allowReuse)) < 0) {
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FATAL("problems setsockopt'ing: %s\n", strerror(errno));
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}
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if (bind(sock, addrp, addrlen) < 0) {
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close(sock);
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return -1;
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}
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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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numberOfListenSockets++;
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listenSockets =
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xrealloc(listenSockets, sizeof(int) * numberOfListenSockets);
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listenSockets[numberOfListenSockets - 1] = sock;
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return 0;
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}
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static void parseListenConfigParam(unsigned int port, ConfigParam * param)
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{
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struct sockaddr *addrp = NULL;
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socklen_t addrlen = 0;
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struct sockaddr_in sin;
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#ifdef HAVE_IPV6
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struct sockaddr_in6 sin6;
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int useIpv6 = ipv6Supported();
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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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memset(&sin, 0, sizeof(struct sockaddr_in));
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sin.sin_port = htons(port);
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sin.sin_family = AF_INET;
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if (!param || 0 == strcmp(param->value, "any")) {
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DEBUG("binding to any address\n");
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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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addrp = (struct sockaddr *)&sin6;
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addrlen = sizeof(struct sockaddr_in6);
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if (establishListen(port, addrp, addrlen) < 0)
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BINDERROR();
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}
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#endif
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sin.sin_addr.s_addr = INADDR_ANY;
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addrp = (struct sockaddr *)&sin;
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addrlen = sizeof(struct sockaddr_in);
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#ifdef HAVE_IPV6
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if ((establishListen(port, addrp, addrlen) < 0) && !useIpv6) {
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#else
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if (establishListen(port, addrp, addrlen) < 0) {
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#endif
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BINDERROR();
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}
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} else {
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struct hostent *he;
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DEBUG("binding to address for %s\n", param->value);
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if (!(he = gethostbyname(param->value))) {
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FATAL("can't lookup host \"%s\" at line %i\n",
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param->value, param->line);
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}
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switch (he->h_addrtype) {
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#ifdef HAVE_IPV6
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case AF_INET6:
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if (!useIpv6) {
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FATAL("no IPv6 support, but a IPv6 address "
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"found for \"%s\" at line %i\n",
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param->value, param->line);
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}
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memcpy((char *)&sin6.sin6_addr.s6_addr,
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(char *)he->h_addr, he->h_length);
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addrp = (struct sockaddr *)&sin6;
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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:
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memcpy((char *)&sin.sin_addr.s_addr,
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(char *)he->h_addr, he->h_length);
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addrp = (struct sockaddr *)&sin;
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addrlen = sizeof(struct sockaddr_in);
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break;
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default:
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FATAL("address type for \"%s\" is not IPv4 or IPv6 "
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"at line %i\n", param->value, param->line);
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}
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if (establishListen(port, addrp, addrlen) < 0)
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BINDERROR();
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}
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}
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void listenOnPort(void)
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{
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int port = DEFAULT_PORT;
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ConfigParam *param = getNextConfigParam(CONF_BIND_TO_ADDRESS, NULL);
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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') {
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FATAL("%s \"%s\" specified at line %i is not a "
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"positive integer", CONF_PORT,
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portParam->value, portParam->line);
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}
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}
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boundPort = port;
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do {
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parseListenConfigParam(port, param);
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} while ((param = getNextConfigParam(CONF_BIND_TO_ADDRESS, param)));
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}
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void addListenSocketsToFdSet(fd_set * fds, int *fdmax)
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{
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int i;
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for (i = 0; i < numberOfListenSockets; i++) {
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FD_SET(listenSockets[i], fds);
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if (listenSockets[i] > *fdmax)
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*fdmax = listenSockets[i];
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}
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}
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void closeAllListenSockets(void)
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{
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int i;
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DEBUG("closeAllListenSockets called\n");
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for (i = 0; i < numberOfListenSockets; i++) {
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DEBUG("closing listen socket %i\n", i);
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while (close(listenSockets[i]) < 0 && errno == EINTR) ;
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}
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freeAllListenSockets();
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}
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void freeAllListenSockets(void)
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{
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numberOfListenSockets = 0;
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free(listenSockets);
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listenSockets = NULL;
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}
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void getConnections(fd_set * fds)
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{
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int i;
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int fd = 0;
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struct sockaddr sockAddr;
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socklen_t socklen = sizeof(sockAddr);
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for (i = 0; i < numberOfListenSockets; i++) {
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if (FD_ISSET(listenSockets[i], fds)) {
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if ((fd = accept(listenSockets[i], &sockAddr, &socklen))
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>= 0) {
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openAInterface(fd, &sockAddr);
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} else if (fd < 0
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&& (errno != EAGAIN && errno != EINTR)) {
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ERROR("Problems accept()'ing\n");
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}
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}
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}
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}
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int getBoundPort(void)
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{
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return boundPort;
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}
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