Disable compile warning: no newline at end of file
[platform/upstream/libwebsockets.git] / lib / lws-plat-unix.c
1 #include "private-libwebsockets.h"
2
3 /*
4  * included from libwebsockets.c for unix builds
5  */
6
7 unsigned long long time_in_microseconds(void)
8 {
9         struct timeval tv;
10         gettimeofday(&tv, NULL);
11         return (tv.tv_sec * 1000000) + tv.tv_usec;
12 }
13
14 LWS_VISIBLE int libwebsockets_get_random(struct libwebsocket_context *context,
15                                                              void *buf, int len)
16 {
17         return read(context->fd_random, (char *)buf, len);
18 }
19
20 LWS_VISIBLE int lws_send_pipe_choked(struct libwebsocket *wsi)
21 {
22         struct libwebsocket_pollfd fds;
23
24         /* treat the fact we got a truncated send pending as if we're choked */
25         if (wsi->truncated_send_len)
26                 return 1;
27
28         fds.fd = wsi->sock;
29         fds.events = POLLOUT;
30         fds.revents = 0;
31
32         if (poll(&fds, 1, 0) != 1)
33                 return 1;
34
35         if ((fds.revents & POLLOUT) == 0)
36                 return 1;
37
38         /* okay to send another packet without blocking */
39
40         return 0;
41 }
42
43 LWS_VISIBLE int
44 lws_poll_listen_fd(struct libwebsocket_pollfd *fd)
45 {
46         return poll(fd, 1, 0);
47 }
48
49 /*
50  * This is just used to interrupt poll waiting
51  * we don't have to do anything with it.
52  */
53 static void lws_sigusr2(int sig)
54 {
55 }
56
57 /**
58  * libwebsocket_cancel_service() - Cancel servicing of pending websocket activity
59  * @context:    Websocket context
60  *
61  *      This function let a call to libwebsocket_service() waiting for a timeout
62  *      immediately return.
63  */
64 LWS_VISIBLE void
65 libwebsocket_cancel_service(struct libwebsocket_context *context)
66 {
67         char buf = 0;
68
69         if (write(context->dummy_pipe_fds[1], &buf, sizeof(buf)) != 1)
70                 lwsl_err("Cannot write to dummy pipe");
71 }
72
73 LWS_VISIBLE void lwsl_emit_syslog(int level, const char *line)
74 {
75         int syslog_level = LOG_DEBUG;
76
77         switch (level) {
78         case LLL_ERR:
79                 syslog_level = LOG_ERR;
80                 break;
81         case LLL_WARN:
82                 syslog_level = LOG_WARNING;
83                 break;
84         case LLL_NOTICE:
85                 syslog_level = LOG_NOTICE;
86                 break;
87         case LLL_INFO:
88                 syslog_level = LOG_INFO;
89                 break;
90         }
91         syslog(syslog_level, "%s", line);
92 }
93
94 LWS_VISIBLE int
95 lws_plat_service(struct libwebsocket_context *context, int timeout_ms)
96 {
97         int n;
98         int m;
99         char buf;
100
101         /* stay dead once we are dead */
102
103         if (!context)
104                 return 1;
105
106         lws_libev_run(context);
107
108         context->service_tid = context->protocols[0].callback(context, NULL,
109                                      LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0);
110
111         n = poll(context->fds, context->fds_count, timeout_ms);
112         context->service_tid = 0;
113
114         if (n == 0) /* poll timeout */ {
115                 libwebsocket_service_fd(context, NULL);
116                 return 0;
117         }
118
119         if (n < 0) {
120                 if (LWS_ERRNO != LWS_EINTR)
121                         return -1;
122                 return 0;
123         }
124
125         /* any socket with events to service? */
126
127         for (n = 0; n < context->fds_count; n++) {
128                 if (!context->fds[n].revents)
129                         continue;
130
131                 if (context->fds[n].fd == context->dummy_pipe_fds[0]) {
132                         if (read(context->fds[n].fd, &buf, 1) != 1)
133                                 lwsl_err("Cannot read from dummy pipe.");
134                         continue;
135                 }
136
137                 m = libwebsocket_service_fd(context, &context->fds[n]);
138                 if (m < 0)
139                         return -1;
140                 /* if something closed, retry this slot */
141                 if (m)
142                         n--;
143         }
144
145         return 0;
146 }
147
148 LWS_VISIBLE int
149 lws_plat_set_socket_options(struct libwebsocket_context *context, int fd)
150 {
151         int optval = 1;
152         socklen_t optlen = sizeof(optval);
153
154 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__)
155         struct protoent *tcp_proto;
156 #endif
157
158         if (context->ka_time) {
159                 /* enable keepalive on this socket */
160                 optval = 1;
161                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
162                                              (const void *)&optval, optlen) < 0)
163                         return 1;
164
165 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__CYGWIN__)
166
167                 /*
168                  * didn't find a way to set these per-socket, need to
169                  * tune kernel systemwide values
170                  */
171 #else
172                 /* set the keepalive conditions we want on it too */
173                 optval = context->ka_time;
174                 if (setsockopt(fd, IPPROTO_IP, TCP_KEEPIDLE,
175                                              (const void *)&optval, optlen) < 0)
176                         return 1;
177
178                 optval = context->ka_interval;
179                 if (setsockopt(fd, IPPROTO_IP, TCP_KEEPINTVL,
180                                              (const void *)&optval, optlen) < 0)
181                         return 1;
182
183                 optval = context->ka_probes;
184                 if (setsockopt(fd, IPPROTO_IP, TCP_KEEPCNT,
185                                              (const void *)&optval, optlen) < 0)
186                         return 1;
187 #endif
188         }
189
190         /* Disable Nagle */
191         optval = 1;
192 #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__NetBSD__)
193         setsockopt(fd, SOL_TCP, TCP_NODELAY, (const void *)&optval, optlen);
194 #else
195         tcp_proto = getprotobyname("TCP");
196         setsockopt(fd, tcp_proto->p_proto, TCP_NODELAY, &optval, optlen);
197 #endif
198
199         /* We are nonblocking... */
200         fcntl(fd, F_SETFL, O_NONBLOCK);
201
202         return 0;
203 }
204
205 LWS_VISIBLE void
206 lws_plat_drop_app_privileges(struct lws_context_creation_info *info)
207 {
208         if (info->gid != -1)
209                 if (setgid(info->gid))
210                         lwsl_warn("setgid: %s\n", strerror(LWS_ERRNO));
211         if (info->uid != -1)
212                 if (setuid(info->uid))
213                         lwsl_warn("setuid: %s\n", strerror(LWS_ERRNO)); 
214 }
215
216 LWS_VISIBLE int
217 lws_plat_init_fd_tables(struct libwebsocket_context *context)
218 {
219         if (lws_libev_init_fd_table(context))
220                 /* libev handled it instead */
221                 return 0;
222
223         if (pipe(context->dummy_pipe_fds)) {
224                 lwsl_err("Unable to create pipe\n");
225                 return 1;
226         }
227
228         /* use the read end of pipe as first item */
229         context->fds[0].fd = context->dummy_pipe_fds[0];
230         context->fds[0].events = LWS_POLLIN;
231         context->fds[0].revents = 0;
232         context->fds_count = 1;
233         
234         context->fd_random = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY);
235         if (context->fd_random < 0) {
236                 lwsl_err("Unable to open random device %s %d\n",
237                                     SYSTEM_RANDOM_FILEPATH, context->fd_random);
238                 return 1;
239         }
240
241         return 0;
242 }
243
244 static void sigpipe_handler(int x)
245 {
246 }
247
248
249 LWS_VISIBLE int
250 lws_plat_context_early_init(void)
251 {
252         sigset_t mask;
253
254         signal(SIGUSR2, lws_sigusr2);
255         sigemptyset(&mask);
256         sigaddset(&mask, SIGUSR2);
257
258         sigprocmask(SIG_BLOCK, &mask, NULL);
259         
260         signal(SIGPIPE, sigpipe_handler);
261
262         return 0;
263 }
264
265 LWS_VISIBLE void
266 lws_plat_context_early_destroy(struct libwebsocket_context *context)
267 {
268 }
269
270 LWS_VISIBLE void
271 lws_plat_context_late_destroy(struct libwebsocket_context *context)
272 {
273         close(context->dummy_pipe_fds[0]);
274         close(context->dummy_pipe_fds[1]);
275         close(context->fd_random);
276 }
277
278 /* cast a struct sockaddr_in6 * into addr for ipv6 */
279
280 LWS_VISIBLE int
281 interface_to_sa(struct libwebsocket_context *context,
282                 const char *ifname, struct sockaddr_in *addr, size_t addrlen)
283 {
284         int rc = -1;
285
286         struct ifaddrs *ifr;
287         struct ifaddrs *ifc;
288 #ifdef LWS_USE_IPV6
289         struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
290 #endif
291
292         getifaddrs(&ifr);
293         for (ifc = ifr; ifc != NULL && rc; ifc = ifc->ifa_next) {
294                 if (!ifc->ifa_addr)
295                         continue;
296
297                 lwsl_info(" interface %s vs %s\n", ifc->ifa_name, ifname);
298
299                 if (strcmp(ifc->ifa_name, ifname))
300                         continue;
301
302                 switch (ifc->ifa_addr->sa_family) {
303                 case AF_INET:
304 #ifdef LWS_USE_IPV6
305                         if (LWS_IPV6_ENABLED(context)) {
306                                 /* map IPv4 to IPv6 */
307                                 bzero((char *)&addr6->sin6_addr,
308                                                 sizeof(struct in6_addr));
309                                 addr6->sin6_addr.s6_addr[10] = 0xff;
310                                 addr6->sin6_addr.s6_addr[11] = 0xff;
311                                 memcpy(&addr6->sin6_addr.s6_addr[12],
312                                         &((struct sockaddr_in *)ifc->ifa_addr)->sin_addr,
313                                                         sizeof(struct in_addr));
314                         } else
315 #endif
316                                 memcpy(addr,
317                                         (struct sockaddr_in *)ifc->ifa_addr,
318                                                     sizeof(struct sockaddr_in));
319                         break;
320 #ifdef LWS_USE_IPV6
321                 case AF_INET6:
322                         if (rc >= 0)
323                                 break;
324                         memcpy(&addr6->sin6_addr,
325                           &((struct sockaddr_in6 *)ifc->ifa_addr)->sin6_addr,
326                                                        sizeof(struct in6_addr));
327                         break;
328 #endif
329                 default:
330                         continue;
331                 }
332                 rc = 0;
333         }
334
335         freeifaddrs(ifr);
336         
337         return rc;
338 }
339
340 LWS_VISIBLE void
341 lws_plat_insert_socket_into_fds(struct libwebsocket_context *context,
342                                                        struct libwebsocket *wsi)
343 {
344         lws_libev_io(context, wsi, LWS_EV_START | LWS_EV_READ);
345         context->fds[context->fds_count++].revents = 0;
346 }
347
348 LWS_VISIBLE void
349 lws_plat_delete_socket_from_fds(struct libwebsocket_context *context,
350                                                 struct libwebsocket *wsi, int m)
351 {
352 }
353
354 LWS_VISIBLE void
355 lws_plat_service_periodic(struct libwebsocket_context *context)
356 {
357         /* if our parent went down, don't linger around */
358         if (context->started_with_parent &&
359                               kill(context->started_with_parent, 0) < 0)
360                 kill(getpid(), SIGTERM);
361 }
362
363 LWS_VISIBLE int
364 lws_plat_change_pollfd(struct libwebsocket_context *context,
365                       struct libwebsocket *wsi, struct libwebsocket_pollfd *pfd)
366 {
367         return 0;
368 }
369
370 LWS_VISIBLE int
371 lws_plat_open_file(const char* filename, unsigned long* filelen)
372 {
373         struct stat stat_buf;
374         int ret = open(filename, O_RDONLY);
375
376         if (ret < 0)
377                 return LWS_INVALID_FILE;
378
379         fstat(ret, &stat_buf);
380         *filelen = stat_buf.st_size;
381         return ret;
382 }
383
384 #ifdef LWS_USE_IPV6
385 LWS_VISIBLE const char *
386 lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
387
388         return inet_ntop(af, src, dst, cnt);
389 }
390 #endif