libwebsockets.h

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/*
 * libwebsockets - small server side websockets and web server implementation
 *
 * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
 
#ifndef LIBWEBSOCKET_H_3060898B846849FF9F88F5DB59B5950C
#define LIBWEBSOCKET_H_3060898B846849FF9F88F5DB59B5950C
 
#ifdef __cplusplus
#include <cstddef>
#include <cstdarg>
 
extern "C" {
#else
#include <stdarg.h>
#endif
 
#include "lws_config.h"
 
#ifdef LWS_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
 
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
 
 
#if defined(LWS_SUPPRESS_DEPRECATED_API_WARNINGS)
#define OPENSSL_USE_DEPRECATED
#endif
 
/* place for one-shot opaque forward references */
 
typedef struct lws_context * lws_ctx_t;
struct lws_sequencer;
struct lws_dsh;
 
/*
 * CARE: everything using cmake defines needs to be below here
 */
 
#define LWS_US_PER_SEC ((lws_usec_t)1000000)
#define LWS_MS_PER_SEC ((lws_usec_t)1000)
#define LWS_US_PER_MS ((lws_usec_t)1000)
#define LWS_NS_PER_US ((lws_usec_t)1000)
 
#define LWS_KI (1024)
#define LWS_MI (LWS_KI * 1024)
#define LWS_GI (LWS_MI * 1024)
#define LWS_TI ((uint64_t)LWS_GI * 1024)
#define LWS_PI ((uint64_t)LWS_TI * 1024)
 
#define LWS_US_TO_MS(x) ((x + (LWS_US_PER_MS / 2)) / LWS_US_PER_MS)
 
#define LWS_FOURCC(a, b, c, d) ((a << 24) | (b << 16) | (c << 8) | d)
 
#if defined(LWS_HAS_INTPTR_T)
#include <stdint.h>
#define lws_intptr_t intptr_t
#else
typedef unsigned long long lws_intptr_t;
#endif
 
#if defined(WIN32) || defined(_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
 
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stddef.h>
#include <basetsd.h>
#include <io.h>
#ifndef _WIN32_WCE
#include <fcntl.h>
#else
#define _O_RDONLY       0x0000
#define O_RDONLY        _O_RDONLY
#endif
 
typedef int uid_t;
typedef int gid_t;
typedef unsigned short sa_family_t;
#if !defined(LWS_HAVE_SUSECONDS_T)
typedef unsigned int useconds_t;
typedef int suseconds_t;
#endif
 
#define LWS_INLINE __inline
#define LWS_VISIBLE
#define LWS_WARN_UNUSED_RESULT
#define LWS_WARN_DEPRECATED
#define LWS_FORMAT(string_index)
 
#if !defined(LWS_EXTERN) && defined(LWS_BUILDING_SHARED)
#ifdef LWS_DLL
#ifdef LWS_INTERNAL
#define LWS_EXTERN extern __declspec(dllexport)
#else
#define LWS_EXTERN extern __declspec(dllimport)
#endif
#endif
#endif
 
#if !defined(LWS_INTERNAL) && !defined(LWS_EXTERN)
#define LWS_EXTERN
#define LWS_VISIBLE
#endif
 
#if !defined(LWS_EXTERN)
#define LWS_EXTERN
#endif
 
#define LWS_INVALID_FILE INVALID_HANDLE_VALUE
#define LWS_SOCK_INVALID (INVALID_SOCKET)
#define LWS_O_RDONLY _O_RDONLY
#define LWS_O_WRONLY _O_WRONLY
#define LWS_O_CREAT _O_CREAT
#define LWS_O_TRUNC _O_TRUNC
 
#ifndef __func__
#define __func__ __FUNCTION__
#endif
 
#else /* NOT WIN32 */
#include <unistd.h>
#if defined(LWS_HAVE_SYS_CAPABILITY_H) && defined(LWS_HAVE_LIBCAP)
#include <sys/capability.h>
#endif
 
#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__QNX__) || defined(__OpenBSD__)
#include <sys/socket.h>
#include <netinet/in.h>
#endif
 
#define LWS_INLINE inline
#define LWS_O_RDONLY O_RDONLY
#define LWS_O_WRONLY O_WRONLY
#define LWS_O_CREAT O_CREAT
#define LWS_O_TRUNC O_TRUNC
 
#if !defined(LWS_PLAT_OPTEE) && !defined(OPTEE_TA) && !defined(LWS_PLAT_FREERTOS) && !defined(LWS_PLAT_BAREMETAL)
#include <poll.h>
#include <netdb.h>
#define LWS_INVALID_FILE -1
#define LWS_SOCK_INVALID (-1)
#else
#define getdtablesize() (30)
#if defined(LWS_PLAT_FREERTOS)
#define LWS_INVALID_FILE NULL
#define LWS_SOCK_INVALID (-1)
#else
#define LWS_INVALID_FILE NULL
#define LWS_SOCK_INVALID (-1)
#endif
#endif
 
#if defined(__FreeBSD__)
#include <sys/signal.h>
#endif
#if defined(__GNUC__)
 
/* warn_unused_result attribute only supported by GCC 3.4 or later */
#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
#define LWS_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#else
#define LWS_WARN_UNUSED_RESULT
#endif
 
#if defined(LWS_BUILDING_SHARED)
/* this is only set when we're building lws itself shared */
#define LWS_VISIBLE __attribute__((visibility("default")))
#define LWS_EXTERN extern
 
#else /* not shared */
#if defined(WIN32) || defined(_WIN32) || defined(__MINGW32__)
#define LWS_VISIBLE
#define LWS_EXTERN extern
#else
/*
 * If we explicitly say hidden here, symbols exist as T but
 * cannot be imported at link-time.
 */
#define LWS_VISIBLE
#define LWS_EXTERN
#endif
 
#endif /* not shared */
 
#define LWS_WARN_DEPRECATED __attribute__ ((deprecated))
#define LWS_FORMAT(string_index) __attribute__ ((format(printf, string_index, string_index+1)))
#else /* not GNUC */
 
#define LWS_VISIBLE
#define LWS_WARN_UNUSED_RESULT
#define LWS_WARN_DEPRECATED
#define LWS_FORMAT(string_index)
#if !defined(LWS_EXTERN)
#define LWS_EXTERN extern
#endif
#endif
 
 
#if defined(__ANDROID__)
#include <netinet/in.h>
#include <unistd.h>
#endif
#endif
 
#ifdef _WIN32
#define random rand
#else
#if !defined(LWS_PLAT_OPTEE)
#include <sys/time.h>
#include <unistd.h>
#endif
#endif
 
#if defined(LWS_WITH_LIBUV_INTERNAL)
#include <uv.h>
 
#ifdef LWS_HAVE_UV_VERSION_H
#include <uv-version.h>
#endif
 
#ifdef LWS_HAVE_NEW_UV_VERSION_H
#include <uv/version.h>
#endif
#endif
 
#if defined(LWS_WITH_TLS)
 
#ifdef USE_WOLFSSL
#ifdef USE_OLD_CYASSL
#ifdef _WIN32
/*
 * Include user-controlled settings for windows from
 * <wolfssl-root>/IDE/WIN/user_settings.h
 */
#include <IDE/WIN/user_settings.h>
#include <cyassl/ctaocrypt/settings.h>
#else
#include <cyassl/options.h>
#endif
#include <cyassl/openssl/ssl.h>
#include <cyassl/error-ssl.h>
 
#else
#ifdef _WIN32
/*
 * Include user-controlled settings for windows from
 * <wolfssl-root>/IDE/WIN/user_settings.h
 */
#include <IDE/WIN/user_settings.h>
#include <wolfssl/wolfcrypt/settings.h>
#else
#include <wolfssl/options.h>
#endif
#include <wolfssl/openssl/ssl.h>
#include <wolfssl/error-ssl.h>
#endif /* not USE_OLD_CYASSL */
#else
#if defined(LWS_WITH_MBEDTLS)
#if defined(LWS_PLAT_FREERTOS)
/* this filepath is passed to us but without quotes or <> */
#if !defined(LWS_AMAZON_RTOS)
/* AMAZON RTOS has its own setting via MTK_MBEDTLS_CONFIG_FILE */
#undef MBEDTLS_CONFIG_FILE
#define MBEDTLS_CONFIG_FILE <mbedtls/esp_config.h>
#endif
#endif
#if defined(LWS_WITH_TLS)
#include <mbedtls/ssl.h>
#include <mbedtls/entropy.h>
#include <mbedtls/ctr_drbg.h>
 
#if !defined(MBEDTLS_PRIVATE)
#define MBEDTLS_PRIVATE(_q) _q
#endif
 
#endif
#else
#include <openssl/ssl.h>
#if !defined(LWS_WITH_MBEDTLS)
#include <openssl/err.h>
#endif
#endif
#endif /* not USE_WOLFSSL */
#endif
 
/*
 * Helpers for pthread mutex in user code... if lws is built for
 * multiple service threads, these resolve to pthread mutex
 * operations.  In the case LWS_MAX_SMP is 1 (the default), they
 * are all NOPs and no pthread type or api is referenced.
 */
 
#if LWS_MAX_SMP > 1
 
#include <pthread.h>
 
#define lws_pthread_mutex(name) pthread_mutex_t name;
 
static LWS_INLINE void
lws_pthread_mutex_init(pthread_mutex_t *lock)
{
        pthread_mutex_init(lock, NULL);
}
 
static LWS_INLINE void
lws_pthread_mutex_destroy(pthread_mutex_t *lock)
{
        pthread_mutex_destroy(lock);
}
 
static LWS_INLINE void
lws_pthread_mutex_lock(pthread_mutex_t *lock)
{
        pthread_mutex_lock(lock);
}
 
static LWS_INLINE void
lws_pthread_mutex_unlock(pthread_mutex_t *lock)
{
        pthread_mutex_unlock(lock);
}
 
#else
#define lws_pthread_mutex(name)
#define lws_pthread_mutex_init(_a)
#define lws_pthread_mutex_destroy(_a)
#define lws_pthread_mutex_lock(_a)
#define lws_pthread_mutex_unlock(_a)
#endif
 
 
#define CONTEXT_PORT_NO_LISTEN -1
#define CONTEXT_PORT_NO_LISTEN_SERVER -2
 
#include <libwebsockets/lws-logs.h>
 
 
#include <stddef.h>
 
#ifndef lws_container_of
#define lws_container_of(P,T,M) ((T *)((char *)(P) - offsetof(T, M)))
#endif
#define LWS_ALIGN_TO(x, bou) x += ((bou) - ((x) % (bou))) % (bou)
 
struct lws;
 
/* api change list for user code to test against */
 
#define LWS_FEATURE_SERVE_HTTP_FILE_HAS_OTHER_HEADERS_ARG
 
/* the struct lws_protocols has the id field present */
#define LWS_FEATURE_PROTOCOLS_HAS_ID_FIELD
 
/* you can call lws_get_peer_write_allowance */
#define LWS_FEATURE_PROTOCOLS_HAS_PEER_WRITE_ALLOWANCE
 
/* extra parameter introduced in 917f43ab821 */
#define LWS_FEATURE_SERVE_HTTP_FILE_HAS_OTHER_HEADERS_LEN
 
/* File operations stuff exists */
#define LWS_FEATURE_FOPS
 
 
#if defined(_WIN32)
#if !defined(LWS_WIN32_HANDLE_TYPES)
typedef SOCKET lws_sockfd_type;
typedef HANDLE lws_filefd_type;
#endif
 
 
#define lws_pollfd pollfd
#define LWS_POLLHUP     (POLLHUP)
#define LWS_POLLIN      (POLLRDNORM | POLLRDBAND)
#define LWS_POLLOUT     (POLLWRNORM)
 
#else
 
 
#if defined(LWS_PLAT_FREERTOS)
#include <libwebsockets/lws-freertos.h>
#else
typedef int lws_sockfd_type;
typedef int lws_filefd_type;
#endif
 
#if defined(LWS_PLAT_OPTEE)
#include <time.h>
struct timeval {
        time_t          tv_sec;
        unsigned int    tv_usec;
};
#if defined(LWS_WITH_NETWORK)
// #include <poll.h>
#define lws_pollfd pollfd
 
struct timezone;
 
int gettimeofday(struct timeval *tv, struct timezone *tz);
 
    /* Internet address. */
    struct in_addr {
        uint32_t       s_addr;     /* address in network byte order */
    };
 
typedef unsigned short sa_family_t;
typedef unsigned short in_port_t;
typedef uint32_t socklen_t;
 
#include <libwebsockets/lws-optee.h>
 
#if !defined(TEE_SE_READER_NAME_MAX)
           struct addrinfo {
               int              ai_flags;
               int              ai_family;
               int              ai_socktype;
               int              ai_protocol;
               socklen_t        ai_addrlen;
               struct sockaddr *ai_addr;
               char            *ai_canonname;
               struct addrinfo *ai_next;
           };
#endif
 
ssize_t recv(int sockfd, void *buf, size_t len, int flags);
ssize_t send(int sockfd, const void *buf, size_t len, int flags);
ssize_t read(int fd, void *buf, size_t count);
int getsockopt(int sockfd, int level, int optname,
                      void *optval, socklen_t *optlen);
       int setsockopt(int sockfd, int level, int optname,
                      const void *optval, socklen_t optlen);
int connect(int sockfd, const struct sockaddr *addr,
                   socklen_t addrlen);
 
extern int errno;
 
uint16_t ntohs(uint16_t netshort);
uint16_t htons(uint16_t hostshort);
 
int bind(int sockfd, const struct sockaddr *addr,
                socklen_t addrlen);
 
 
#define  MSG_NOSIGNAL 0x4000
#define EAGAIN          11
#define EINTR           4
#define EWOULDBLOCK     EAGAIN
#define EADDRINUSE      98      
#define INADDR_ANY      0
#define AF_INET         2
#define SHUT_WR 1
#define AF_UNSPEC       0
#define PF_UNSPEC       0
#define SOCK_STREAM     1
#define SOCK_DGRAM      2
# define AI_PASSIVE     0x0001
#define IPPROTO_UDP     17
#define SOL_SOCKET      1
#define SO_SNDBUF       7
#define EISCONN         106     
#define EALREADY        114
#define EINPROGRESS     115
int shutdown(int sockfd, int how);
int close(int fd);
int atoi(const char *nptr);
long long atoll(const char *nptr);
 
int socket(int domain, int type, int protocol);
       int getaddrinfo(const char *node, const char *service,
                       const struct addrinfo *hints,
                       struct addrinfo **res);
 
       void freeaddrinfo(struct addrinfo *res);
 
#if !defined(TEE_SE_READER_NAME_MAX)
struct lws_pollfd
{
        int fd;                     /* File descriptor to poll.  */
        short int events;           /* Types of events poller cares about.  */
        short int revents;          /* Types of events that actually occurred.  */
};
#endif
 
int poll(struct pollfd *fds, int nfds, int timeout);
 
#define LWS_POLLHUP (0x18)
#define LWS_POLLIN (1)
#define LWS_POLLOUT (4)
#else
struct lws_pollfd;
struct sockaddr_in;
#endif
#else
#define lws_pollfd pollfd
#define LWS_POLLHUP (POLLHUP | POLLERR)
#define LWS_POLLIN (POLLIN)
#define LWS_POLLOUT (POLLOUT)
#endif
#endif
 
 
#if (defined(WIN32) || defined(_WIN32)) && !defined(__MINGW32__)
/* ... */
#define ssize_t SSIZE_T
#endif
 
#if defined(WIN32) && defined(LWS_HAVE__STAT32I64)
#include <sys/types.h>
#include <sys/stat.h>
#endif
 
#if defined(LWS_HAVE_STDINT_H)
#include <stdint.h>
#else
#if defined(WIN32) || defined(_WIN32)
/* !!! >:-[  */
typedef __int64 int64_t;
typedef unsigned __int64 uint64_t;
typedef __int32 int32_t;
typedef unsigned __int32 uint32_t;
typedef __int16 int16_t;
typedef unsigned __int16 uint16_t;
typedef unsigned __int8 uint8_t;
#else
typedef unsigned int uint32_t;
typedef unsigned short uint16_t;
typedef unsigned char uint8_t;
#endif
#endif
 
typedef int64_t lws_usec_t;
typedef unsigned long long lws_filepos_t;
typedef long long lws_fileofs_t;
typedef uint32_t lws_fop_flags_t;
 
#define lws_concat_temp(_t, _l) (_t + sizeof(_t) - _l)
#define lws_concat_used(_t, _l) (sizeof(_t) - _l)
 
struct lws_pollargs {
        lws_sockfd_type fd;     
        int events;             
        int prev_events;        
};
 
#if !defined(LWS_SIZEOFPTR)
#define LWS_SIZEOFPTR ((int)sizeof (void *))
#endif
 
#if defined(__x86_64__)
#define _LWS_PAD_SIZE 16        /* Intel recommended for best performance */
#else
#define _LWS_PAD_SIZE LWS_SIZEOFPTR   /* Size of a pointer on the target arch */
#endif
#define _LWS_PAD(n) (((n) % _LWS_PAD_SIZE) ? \
                ((n) + (_LWS_PAD_SIZE - ((n) % _LWS_PAD_SIZE))) : (n))
/* last 2 is for lws-meta */
#define LWS_PRE _LWS_PAD(4 + 10 + 2)
/* used prior to 1.7 and retained for backward compatibility */
#define LWS_SEND_BUFFER_PRE_PADDING LWS_PRE
#define LWS_SEND_BUFFER_POST_PADDING 0
 
 
 
struct lws_extension; /* needed even with ws exts disabled for create context */
struct lws_token_limits;
struct lws_protocols;
struct lws_context;
struct lws_tokens;
struct lws_vhost;
struct lws;
 
#include <libwebsockets/lws-dll2.h>
#include <libwebsockets/lws-map.h>
 
#include <libwebsockets/lws-fault-injection.h>
#include <libwebsockets/lws-timeout-timer.h>
#include <libwebsockets/lws-cache-ttl.h>
#if defined(LWS_WITH_SYS_SMD)
#include <libwebsockets/lws-smd.h>
#endif
#include <libwebsockets/lws-state.h>
#include <libwebsockets/lws-retry.h>
#if defined(LWS_WITH_NETWORK)
#include <libwebsockets/lws-adopt.h>
#include <libwebsockets/lws-network-helper.h>
#include <libwebsockets/lws-metrics.h>
#endif
 
#include <libwebsockets/lws-system.h>
#if defined(LWS_WITH_NETWORK)
#include <libwebsockets/lws-ws-close.h>
#include <libwebsockets/lws-callbacks.h>
#include <libwebsockets/lws-ws-state.h>
#include <libwebsockets/lws-ws-ext.h>
#include <libwebsockets/lws-protocols-plugins.h>
#endif
#include <libwebsockets/lws-context-vhost.h>
 
#if defined(LWS_WITH_NETWORK)
#if defined(LWS_WITH_CONMON)
#include <libwebsockets/lws-conmon.h>
#endif
 
#if defined(LWS_ROLE_MQTT)
#include <libwebsockets/lws-mqtt.h>
#endif
#include <libwebsockets/lws-client.h>
#include <libwebsockets/lws-http.h>
#include <libwebsockets/lws-spa.h>
#endif
#include <libwebsockets/lws-purify.h>
#include <libwebsockets/lws-misc.h>
#include <libwebsockets/lws-dsh.h>
#if defined(LWS_WITH_NETWORK)
#include <libwebsockets/lws-service.h>
#include <libwebsockets/lws-write.h>
#include <libwebsockets/lws-writeable.h>
#endif
#include <libwebsockets/lws-ring.h>
#include <libwebsockets/lws-sha1-base64.h>
#include <libwebsockets/lws-x509.h>
#if defined(LWS_WITH_NETWORK)
#include <libwebsockets/lws-cgi.h>
#endif
#if defined(LWS_WITH_FILE_OPS)
#include <libwebsockets/lws-vfs.h>
#endif
#include <libwebsockets/lws-gencrypto.h>
 
#include <libwebsockets/lws-lejp.h>
#include <libwebsockets/lws-lecp.h>
#include <libwebsockets/lws-cose.h>
#include <libwebsockets/lws-struct.h>
#include <libwebsockets/lws-threadpool.h>
#include <libwebsockets/lws-tokenize.h>
#include <libwebsockets/lws-lwsac.h>
#include <libwebsockets/lws-fts.h>
#include <libwebsockets/lws-diskcache.h>
#include <libwebsockets/lws-sequencer.h>
#include <libwebsockets/lws-secure-streams.h>
#include <libwebsockets/lws-secure-streams-serialization.h>
#include <libwebsockets/lws-secure-streams-policy.h>
#include <libwebsockets/lws-secure-streams-client.h>
#include <libwebsockets/lws-secure-streams-transport-proxy.h>
 
#if !defined(LWS_PLAT_FREERTOS)
#include <libwebsockets/abstract/abstract.h>
 
#include <libwebsockets/lws-test-sequencer.h>
#endif
#include <libwebsockets/lws-async-dns.h>
 
#if defined(LWS_WITH_TLS)
 
#include <libwebsockets/lws-tls-sessions.h>
 
#if defined(LWS_WITH_MBEDTLS)
#include <mbedtls/md5.h>
#include <mbedtls/sha1.h>
#include <mbedtls/sha256.h>
#include <mbedtls/sha512.h>
#endif
 
#include <libwebsockets/lws-genhash.h>
#include <libwebsockets/lws-genrsa.h>
#include <libwebsockets/lws-genaes.h>
#include <libwebsockets/lws-genec.h>
 
#include <libwebsockets/lws-jwk.h>
#include <libwebsockets/lws-jose.h>
#include <libwebsockets/lws-jws.h>
#include <libwebsockets/lws-jwe.h>
 
#endif
 
#if defined(LWS_WITH_NETWORK)
#include <libwebsockets/lws-eventlib-exports.h>
#endif
#include <libwebsockets/lws-i2c.h>
#include <libwebsockets/lws-spi.h>
#include <libwebsockets/lws-gpio.h>
#include <libwebsockets/lws-bb-i2c.h>
#include <libwebsockets/lws-bb-spi.h>
#include <libwebsockets/lws-button.h>
#include <libwebsockets/lws-led.h>
#include <libwebsockets/lws-pwm.h>
#include <libwebsockets/lws-display.h>
#include <libwebsockets/lws-ssd1306-i2c.h>
#include <libwebsockets/lws-ili9341-spi.h>
#include <libwebsockets/lws-settings.h>
#if defined(LWS_WITH_NETWORK)
#include <libwebsockets/lws-netdev.h>
#endif
#ifdef __cplusplus
}
#endif
 
#endif