1 /* Copyright (C) 2009-2014, Martin Johansson <martin@fatbob.nu>
2 Copyright (C) 2005-2014, 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>
52 bool_t shutdown_server;
53 extern char *bindaddr;
54 extern char *bindaddr6;
58 bool_t hasv4 = true, hasv6 = true;
61 int nofServerSocks = 4;
63 /* Check which IP versions are supported by the system. */
64 void checkIPversions()
68 testsocket = socket(PF_INET, SOCK_STREAM, 0);
69 hasv4 = (errno == EAFNOSUPPORT) ? false : true;
70 if (!(testsocket < 0)) close(testsocket);
72 testsocket = socket(PF_INET6, SOCK_STREAM, 0);
73 hasv6 = (errno == EAFNOSUPPORT) ? false : true;
74 if (!(testsocket < 0)) close(testsocket);
78 Log_info("IPv4 is not supported by this system");
84 Log_info("IPv6 is not supported by this system");
88 if(nofServerSocks == 0)
90 Log_fatal("Neither IPv4 nor IPv6 are supported by this system");
94 /* Initialize the address structures for IPv4 and IPv6 */
95 struct sockaddr_storage** Server_setupAddressesAndPorts()
97 struct sockaddr_storage** addresses = calloc(2, sizeof(void*));
99 struct sockaddr_storage* v4address = calloc(1, sizeof(struct sockaddr_storage));
100 v4address->ss_family = AF_INET;
101 struct sockaddr_storage* v6address = calloc(1, sizeof(struct sockaddr_storage));
102 v6address->ss_family = AF_INET6;
104 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
105 v4address->ss_len = sizeof(struct sockaddr_storage);
106 v6address->ss_len = sizeof(struct sockaddr_storage);
111 error = inet_pton(AF_INET, (!bindaddr) ? ((getStrConf(BINDADDR)) ? getStrConf(BINDADDR) : "0.0.0.0")
112 : bindaddr, &(((struct sockaddr_in*)v4address)->sin_addr));
114 Log_fatal("Invalid IPv4 address supplied!");
115 else if (error == -1)
116 Log_warn("Could not allocate IPv4 address");
118 error = inet_pton(AF_INET6, (!bindaddr6) ? ((getStrConf(BINDADDR6)) ? getStrConf(BINDADDR6) : "::")
119 : bindaddr6, &(((struct sockaddr_in6*)v6address)->sin6_addr));
121 Log_fatal("Invalid IPv6 address supplied!");
122 else if (error == -1)
123 Log_warn("Could not allocate IPv6 address");
125 ((struct sockaddr_in*)v4address)->sin_port = htons((bindport) ? bindport : getIntConf(BINDPORT));
126 ((struct sockaddr_in6*)v6address)->sin6_port = htons((bindport6) ? bindport6 : getIntConf(BINDPORT6));
128 addresses[0] = v4address;
129 addresses[1] = v6address;
134 void Server_runLoop(struct pollfd* pollfds)
136 int timeout, rc, clientcount;
138 etimer_t janitorTimer;
139 Timer_init(&janitorTimer);
141 while (!shutdown_server) {
142 struct sockaddr_storage remote;
145 for(i = 0; i < nofServerSocks; i++) {
146 pollfds[i].revents = 0;
149 clientcount = Client_getfds(&pollfds[nofServerSocks]);
151 timeout = (int)(1000000LL - (int64_t)Timer_elapsed(&janitorTimer)) / 1000LL;
154 Timer_restart(&janitorTimer);
155 timeout = (int)(1000000LL - (int64_t)Timer_elapsed(&janitorTimer)) / 1000LL;
157 rc = poll(pollfds, clientcount + nofServerSocks, timeout);
159 /* Poll timed out, do maintenance */
160 Timer_restart(&janitorTimer);
165 if (errno == EINTR) /* signal */
168 Log_fatal("poll: error %d (%s)", errno, strerror(errno));
171 /* Check for new connection */
172 for (i = 0; i < nofServerSocks / 2; i++) {
173 if (pollfds[i].revents) {
175 static uint32_t addrlen = sizeof(struct sockaddr_storage);
176 tcpfd = accept(pollfds[i].fd, (struct sockaddr *)&remote, &addrlen);
177 fcntl(tcpfd, F_SETFL, O_NONBLOCK);
178 setsockopt(tcpfd, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(int));
179 Log_debug("Connection from %s port %d\n", Util_addressToString(&remote), Util_addressToPort(&remote));
180 if (Client_add(tcpfd, &remote) < 0)
185 for (i = nofServerSocks / 2; i < nofServerSocks; i++) {
186 if (pollfds[i].revents)
187 Client_read_udp(udpsocks[i - nofServerSocks / 2]);
190 for (i = 0; i < clientcount; i++) {
191 if (pollfds[nofServerSocks + i].revents & POLLIN)
192 Client_read_fd(pollfds[nofServerSocks + i].fd);
194 if (pollfds[nofServerSocks + i].revents & POLLOUT)
195 Client_write_fd(pollfds[nofServerSocks + i].fd);
197 Sharedmemory_update();
201 void Server_setupTCPSockets(struct sockaddr_storage* addresses[2], struct pollfd* pollfds)
207 /* IPv4 socket setup */
208 sockets[0] = socket(PF_INET, SOCK_STREAM, 0);
210 Log_fatal("socket IPv4");
211 if (setsockopt(sockets[0], SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) != 0)
212 Log_fatal("setsockopt IPv4: %s", strerror(errno));
213 if (bind(sockets[0], (struct sockaddr *)addresses[0], sizeof (struct sockaddr_in)) < 0)
214 Log_fatal("bind %s %d: %s", Util_addressToString(addresses[0]), Util_addressToPort(addresses[0]), strerror(errno));
215 if (listen(sockets[0], 3) < 0)
216 Log_fatal("listen IPv4");
217 fcntl(sockets[0], F_SETFL, O_NONBLOCK);
219 pollfds[0].fd = sockets[0];
220 pollfds[0].events = POLLIN;
224 /* IPv6 socket setup */
225 sockets[1] = socket(PF_INET6, SOCK_STREAM, 0);
227 Log_fatal("socket IPv6: %s", strerror(errno));
228 if (setsockopt(sockets[1], SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) != 0)
229 Log_fatal("setsockopt IPv6: %s", strerror(errno));
230 if (setsockopt(sockets[1], IPPROTO_IPV6, IPV6_V6ONLY, &yes, sizeof(int)) != 0)
231 Log_fatal("setsockopt IPv6: %s", strerror(errno));
232 if (bind(sockets[1], (struct sockaddr *)addresses[1], sizeof (struct sockaddr_in6)) < 0)
233 Log_fatal("bind %s %d: %s", Util_addressToString(addresses[1]), Util_addressToPort(addresses[1]), strerror(errno));
234 if (listen(sockets[1], 3) < 0)
235 Log_fatal("listen IPv6");
236 fcntl(sockets[1], F_SETFL, O_NONBLOCK);
239 /* If there is an IPv4 address, then IPv6 will use the second socket, otherwise it uses the first */
240 pollfds[(hasv4) ? 1 : 0].fd = sockets[1];
241 pollfds[(hasv4) ? 1 : 0].events = POLLIN;
245 void Server_setupUDPSockets(struct sockaddr_storage* addresses[2], struct pollfd* pollfds)
248 int sockets[2] = {-1, -1};
250 if((udpsocks = calloc(nofServerSocks / 2, sizeof(int))) == NULL)
251 Log_fatal("Out of memory (%s:%s)", __FILE__, __LINE__);
254 sockets[0] = socket(PF_INET, SOCK_DGRAM, 0);
255 if (bind(sockets[0], (struct sockaddr *) addresses[0], sizeof (struct sockaddr_in)) < 0)
256 Log_fatal("bind %s %d: %s", Util_addressToString(addresses[0]), Util_addressToPort(addresses[0]), strerror(errno));
258 if (setsockopt(sockets[0], IPPROTO_IP, IP_TOS, &val, sizeof(val)) < 0)
259 Log_warn("Server: Failed to set TOS for UDP Socket");
261 if (setsockopt(sockets[0], IPPROTO_IP, IP_TOS, &val, sizeof(val)) < 0)
262 Log_warn("Server: Failed to set TOS for UDP Socket");
264 fcntl(sockets[0], F_SETFL, O_NONBLOCK);
265 pollfds[(hasv6) ? 2 : 1].fd = sockets[0];
266 pollfds[(hasv6) ? 2 : 1].events = POLLIN | POLLHUP | POLLERR;
267 udpsocks[0] = sockets[0];
271 sockets[1] = socket(PF_INET6, SOCK_DGRAM, 0);
272 if (setsockopt(sockets[1], IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(int)) != 0)
273 Log_fatal("setsockopt IPv6: %s", strerror(errno));
274 if (bind(sockets[1], (struct sockaddr *) addresses[1], sizeof (struct sockaddr_in6)) < 0)
275 Log_fatal("bind %s %d: %s", Util_addressToString(addresses[1]), Util_addressToPort(addresses[1]), strerror(errno));
277 if (setsockopt(sockets[1], IPPROTO_IPV6, IPV6_TCLASS, &val, sizeof(val)) < 0)
278 Log_warn("Server: Failed to set TOS for UDP Socket");
280 if (setsockopt(sockets[1], IPPROTO_IPV6, IPV6_TCLASS, &val, sizeof(val)) < 0)
281 Log_warn("Server: Failed to set TOS for UDP Socket");
283 fcntl(sockets[1], F_SETFL, O_NONBLOCK);
284 pollfds[(hasv4) ? 3 : 1].fd = sockets[1];
285 pollfds[(hasv4) ? 3 : 1].events = POLLIN | POLLHUP | POLLERR;
286 udpsocks[(hasv4) ? 1 : 0] = sockets[1];
293 struct pollfd *pollfds;
297 /* max clients + server sokets + client connecting that will be disconnected */
298 if ((pollfds = calloc((getIntConf(MAX_CLIENTS) + nofServerSocks + 1) , sizeof(struct pollfd))) == NULL)
299 Log_fatal("out of memory");
301 /* Figure out bind address and port */
302 struct sockaddr_storage** addresses = Server_setupAddressesAndPorts();
304 /* Prepare TCP sockets */
305 Server_setupTCPSockets(addresses, pollfds);
307 /* Prepare UDP sockets */
308 Server_setupUDPSockets(addresses, pollfds);
310 Log_info("uMurmur version %s ('%s') protocol version %d.%d.%d",
311 UMURMUR_VERSION, UMURMUR_CODENAME, PROTVER_MAJOR, PROTVER_MINOR, PROTVER_PATCH);
312 Log_info("Visit http://code.google.com/p/umurmur/");
314 /* Main server loop */
315 Server_runLoop(pollfds);
317 /* Disconnect clients and cleanup memory */
318 Client_disconnect_all();
326 void Server_shutdown()
328 shutdown_server = true;