1 /* Copyright (C) 2009-2012, Martin Johansson <martin@fatbob.nu>
2 Copyright (C) 2005-2012, Thorvald Natvig <thorvald@natvig.com>
6 Redistribution and use in source and binary forms, with or without
7 modification, are permitted provided that the following conditions
10 - Redistributions of source code must retain the above copyright notice,
11 this list of conditions and the following disclaimer.
12 - Redistributions in binary form must reproduce the above copyright notice,
13 this list of conditions and the following disclaimer in the documentation
14 and/or other materials provided with the distribution.
15 - Neither the name of the Developers nor the names of its contributors may
16 be used to endorse or promote products derived from this software without
17 specific prior written permission.
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include <netinet/tcp.h>
35 #include <sys/socket.h>
56 bool_t shutdown_server;
57 extern char *bindaddr;
62 int timeout = 1000, rc;
63 struct pollfd *pollfds;
64 int tcpsock, sockopt = 1;
65 struct sockaddr_in sin;
67 etimer_t janitorTimer;
69 in_addr_t inet_address;
71 /* max clients + listen sock + udp sock + client connecting that will be disconnected */
72 pollfds = malloc((getIntConf(MAX_CLIENTS) + 3) * sizeof(struct pollfd));
74 Log_fatal("out of memory");
76 /* Figure out bind address and port */
78 port = htons(bindport);
80 port = htons(getIntConf(BINDPORT));
82 if (bindaddr != NULL && inet_addr(bindaddr) != -1)
83 inet_address = inet_addr(bindaddr);
84 else if (inet_addr(getStrConf(BINDADDR)) != -1)
85 inet_address = inet_addr(getStrConf(BINDADDR));
87 inet_address = inet_addr("0.0.0.0");
88 Log_info("Bind to %s:%hu", inet_address == 0 ? "*" : inet_ntoa(*((struct in_addr *)&inet_address)), ntohs(port));
90 /* Prepare TCP socket */
91 memset(&sin, 0, sizeof(sin));
92 tcpsock = socket(PF_INET, SOCK_STREAM, 0);
95 if (setsockopt(tcpsock, SOL_SOCKET, SO_REUSEADDR, &sockopt, sizeof(int)) != 0)
96 Log_fatal("setsockopt: %s", strerror(errno));
97 sin.sin_family = AF_INET;
99 sin.sin_addr.s_addr = inet_address;
101 rc = bind(tcpsock, (struct sockaddr *) &sin, sizeof (struct sockaddr_in));
102 if (rc < 0) Log_fatal("bind: %s", strerror(errno));
103 rc = listen(tcpsock, 3);
104 if (rc < 0) Log_fatal("listen");
105 fcntl(tcpsock, F_SETFL, O_NONBLOCK);
107 pollfds[LISTEN_SOCK].fd = tcpsock;
108 pollfds[LISTEN_SOCK].events = POLLIN;
110 /* Prepare UDP socket */
111 memset(&sin, 0, sizeof(sin));
112 udpsock = socket(PF_INET, SOCK_DGRAM, 0);
113 sin.sin_family = AF_INET;
115 sin.sin_addr.s_addr = inet_address;
117 rc = bind(udpsock, (struct sockaddr *) &sin, sizeof (struct sockaddr_in));
119 Log_fatal("bind %d %s: %s", getIntConf(BINDPORT), getStrConf(BINDADDR), strerror(errno));
121 rc = setsockopt(udpsock, IPPROTO_IP, IP_TOS, &val, sizeof(val));
123 Log_warn("Server: Failed to set TOS for UDP Socket");
125 rc = setsockopt(udpsock, IPPROTO_IP, IP_TOS, &val, sizeof(val));
127 Log_warn("Server: Failed to set TOS for UDP Socket");
129 fcntl(udpsock, F_SETFL, O_NONBLOCK);
130 pollfds[UDP_SOCK].fd = udpsock;
131 pollfds[UDP_SOCK].events = POLLIN | POLLHUP | POLLERR;
133 Timer_init(&janitorTimer);
135 Log_info("uMurmur version %s ('%s') protocol version %d.%d.%d",
136 UMURMUR_VERSION, UMURMUR_CODENAME, PROTVER_MAJOR, PROTVER_MINOR, PROTVER_PATCH);
137 Log_info("Visit http://code.google.com/p/umurmur/");
139 /* Main server loop */
140 while (!shutdown_server) {
141 struct sockaddr_in remote;
144 pollfds[UDP_SOCK].revents = 0;
145 pollfds[TCP_SOCK].revents = 0;
146 clientcount = Client_getfds(&pollfds[2]);
148 timeout = (int)(1000000LL - (int64_t)Timer_elapsed(&janitorTimer)) / 1000LL;
151 Timer_restart(&janitorTimer);
152 timeout = (int)(1000000LL - (int64_t)Timer_elapsed(&janitorTimer)) / 1000LL;
154 rc = poll(pollfds, clientcount + 2, timeout);
155 if (rc == 0) { /* Timeout */
157 Timer_restart(&janitorTimer);
162 if (errno == EINTR) /* signal */
165 Log_fatal("poll: error %d", errno);
167 if (pollfds[LISTEN_SOCK].revents) { /* New tcp connection */
170 addrlen = sizeof(struct sockaddr_in);
171 tcpfd = accept(pollfds[LISTEN_SOCK].fd, (struct sockaddr*)&remote, &addrlen);
172 fcntl(tcpfd, F_SETFL, O_NONBLOCK);
173 setsockopt(tcpfd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int));
174 Log_debug("Connection from %s port %d\n", inet_ntoa(remote.sin_addr),
175 ntohs(remote.sin_port));
176 if (Client_add(tcpfd, &remote) < 0)
180 if (pollfds[UDP_SOCK].revents) {
183 for (i = 0; i < clientcount; i++) {
184 if (pollfds[i + 2].revents & POLLIN) {
185 Client_read_fd(pollfds[i + 2].fd);
187 if (pollfds[i + 2].revents & POLLOUT) {
188 Client_write_fd(pollfds[i + 2].fd);
193 /* Disconnect clients */
194 Client_disconnect_all();
198 void Server_shutdown()
200 shutdown_server = true;