1 /*
2 * libwebsockets - small server side websockets and web server implementation
3 *
4 * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 *
24 *  Included from lib/private-lib-core.h if no explicit platform
25 */
26
27#include <fcntl.h>
28#include <strings.h>
29#include <unistd.h>
30
31#include <netinet/in.h>
32#include <netinet/tcp.h>
33#include <arpa/inet.h>
34#include <poll.h>
35#include <netdb.h>
36
37#ifndef __cplusplus
38#include <errno.h>
39#endif
40#include <netdb.h>
41#include <signal.h>
42
43#include <sys/socket.h>
44#include <sys/types.h>
45#include <sys/stat.h>
46#include <sys/time.h>
47#include <sys/mman.h>
48#include <sys/un.h>
49#if defined(LWS_HAVE_EVENTFD)
50#include <sys/eventfd.h>
51#endif
52
53#if defined(__APPLE__)
54#include <machine/endian.h>
55#endif
56#if defined(__FreeBSD__)
57#include <sys/endian.h>
58#endif
59#if defined(__linux__)
60#include <endian.h>
61#include <linux/if_packet.h>
62#include <net/if.h>
63#endif
64#if defined(__QNX__)
65	#include <gulliver.h>
66	#if defined(__LITTLEENDIAN__)
67		#define BYTE_ORDER __LITTLEENDIAN__
68		#define LITTLE_ENDIAN __LITTLEENDIAN__
69		#define BIG_ENDIAN 4321  /* to show byte order (taken from gcc); for suppres warning that BIG_ENDIAN is not defined. */
70	#endif
71	#if defined(__BIGENDIAN__)
72		#define BYTE_ORDER __BIGENDIAN__
73		#define LITTLE_ENDIAN 1234  /* to show byte order (taken from gcc); for suppres warning that LITTLE_ENDIAN is not defined. */
74		#define BIG_ENDIAN __BIGENDIAN__
75	#endif
76#endif
77
78#if defined(LWS_HAVE_PTHREAD_H)
79#include <pthread.h>
80typedef pthread_mutex_t lws_mutex_t;
81#define lws_mutex_init(x)	pthread_mutex_init(&(x), NULL)
82#define lws_mutex_destroy(x)	pthread_mutex_destroy(&(x))
83#define lws_mutex_lock(x)	pthread_mutex_lock(&(x))
84#define lws_mutex_unlock(x)	pthread_mutex_unlock(&(x))
85#endif
86
87#if defined(__sun) && defined(__GNUC__)
88
89#include <arpa/nameser_compat.h>
90
91#if !defined (BYTE_ORDER)
92#define BYTE_ORDER __BYTE_ORDER__
93#endif
94
95#if !defined(LITTLE_ENDIAN)
96#define LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
97#endif
98
99#if !defined(BIG_ENDIAN)
100#define BIG_ENDIAN __ORDER_BIG_ENDIAN__
101#endif
102
103#endif /* sun + GNUC */
104
105#if !defined(BYTE_ORDER)
106#define BYTE_ORDER __BYTE_ORDER
107#endif
108#if !defined(LITTLE_ENDIAN)
109#define LITTLE_ENDIAN __LITTLE_ENDIAN
110#endif
111#if !defined(BIG_ENDIAN)
112#define BIG_ENDIAN __BIG_ENDIAN
113#endif
114
115#if defined(LWS_BUILTIN_GETIFADDRS)
116#include "./misc/getifaddrs.h"
117#else
118
119#if defined(__HAIKU__)
120#define _BSD_SOURCE
121#endif
122#include <ifaddrs.h>
123
124#endif
125
126#if defined (__sun) || defined(__HAIKU__) || defined(__QNX__) || defined(__ANDROID__)
127#include <syslog.h>
128
129#if defined(__ANDROID__)
130#include <sys/resource.h>
131#endif
132
133#else
134#include <sys/syslog.h>
135#endif
136
137#ifdef __QNX__
138# include "netinet/tcp_var.h"
139# define TCP_KEEPINTVL TCPCTL_KEEPINTVL
140# define TCP_KEEPIDLE  TCPCTL_KEEPIDLE
141# define TCP_KEEPCNT   TCPCTL_KEEPCNT
142#endif
143
144#define LWS_ERRNO errno
145#define LWS_EAGAIN EAGAIN
146#define LWS_EALREADY EALREADY
147#define LWS_EINPROGRESS EINPROGRESS
148#define LWS_EINTR EINTR
149#define LWS_EISCONN EISCONN
150#define LWS_ENOTCONN ENOTCONN
151#define LWS_EWOULDBLOCK EWOULDBLOCK
152#define LWS_EADDRINUSE EADDRINUSE
153#define lws_set_blocking_send(wsi)
154#define LWS_SOCK_INVALID (-1)
155
156struct lws_context;
157
158struct lws *
159wsi_from_fd(const struct lws_context *context, int fd);
160
161int
162insert_wsi(const struct lws_context *context, struct lws *wsi);
163
164struct lws_dhcpc_ifstate;
165int
166lws_plat_ifconfig(int fd, struct lws_dhcpc_ifstate *is);
167
168void
169delete_from_fd(const struct lws_context *context, int fd);
170
171#ifndef LWS_NO_FORK
172#ifdef LWS_HAVE_SYS_PRCTL_H
173#include <sys/prctl.h>
174#endif
175#endif
176
177#define compatible_close(x) close(x)
178#define compatible_file_close(fd) close(fd)
179#define lws_plat_socket_offset() (0)
180
181/*
182 * Mac OSX as well as iOS do not define the MSG_NOSIGNAL flag,
183 * but happily have something equivalent in the SO_NOSIGPIPE flag.
184 */
185#ifdef __APPLE__
186/* iOS SDK 12+ seems to define it, undef it for compatibility both ways */
187#undef MSG_NOSIGNAL
188#define MSG_NOSIGNAL SO_NOSIGPIPE
189#endif
190
191/*
192 * Solaris 11.X only supports POSIX 2001, MSG_NOSIGNAL appears in
193 * POSIX 2008.
194 */
195#if defined(__sun) && !defined(MSG_NOSIGNAL)
196 #define MSG_NOSIGNAL 0
197#endif
198
199int
200lws_plat_rawudp_broadcast(uint8_t *p, const uint8_t *canned, size_t canned_len,
201			  size_t n, int fd, const char *iface);
202
203int
204lws_plat_if_up(const char *ifname, int fd, int up);
205