ws connect works

1 files changed, 1117 insertions, 0 deletions

diff --git a/src/mongoose.h b/src/mongoose.h
new file mode 100644
index 0000000..90a8a1f
--- /dev/null
+++ b/src/mongoose.h
@@ -0,0 +1,1117 @@
+// Copyright (c) 2004-2013 Sergey Lyubka
+// Copyright (c) 2013-2021 Cesanta Software Limited
+// All rights reserved
+//
+// This software is dual-licensed: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation. For the terms of this
+// license, see http://www.gnu.org/licenses/
+//
+// You are free to use this software under the terms of the GNU General
+// Public License, but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// Alternatively, you can license this software under a commercial
+// license, as set out in https://www.mongoose.ws/licensing/
+
+#ifndef MONGOOSE_H
+#define MONGOOSE_H
+
+#define MG_VERSION "7.5"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#ifndef MG_ENABLE_SOCKET
+#define MG_ENABLE_SOCKET 1
+#endif
+
+#ifndef MG_ENABLE_MBEDTLS
+#define MG_ENABLE_MBEDTLS 0
+#endif
+
+#ifndef MG_ENABLE_OPENSSL
+#define MG_ENABLE_OPENSSL 0
+#endif
+
+#ifndef MG_ENABLE_CUSTOM_TLS
+#define MG_ENABLE_CUSTOM_TLS 0
+#endif
+
+#ifndef MG_ENABLE_SSI
+#define MG_ENABLE_SSI 1
+#endif
+
+#ifndef MG_ENABLE_IPV6
+#define MG_ENABLE_IPV6 0
+#endif
+
+#ifndef MG_ENABLE_LOG
+#define MG_ENABLE_LOG 1
+#endif
+
+#ifndef MG_ENABLE_MD5
+#define MG_ENABLE_MD5 0
+#endif
+
+// Set MG_ENABLE_WINSOCK=0 for Win32 builds with external IP stack (like LWIP)
+#ifndef MG_ENABLE_WINSOCK
+#define MG_ENABLE_WINSOCK 1
+#endif
+
+#ifndef MG_ENABLE_DIRLIST
+#define MG_ENABLE_DIRLIST 0
+#endif
+
+#ifndef MG_ENABLE_CUSTOM_RANDOM
+#define MG_ENABLE_CUSTOM_RANDOM 0
+#endif
+
+#ifndef MG_ENABLE_PACKED_FS
+#define MG_ENABLE_PACKED_FS 0
+#endif
+
+// Granularity of the send/recv IO buffer growth
+#ifndef MG_IO_SIZE
+#define MG_IO_SIZE 2048
+#endif
+
+// Maximum size of the recv IO buffer
+#ifndef MG_MAX_RECV_BUF_SIZE
+#define MG_MAX_RECV_BUF_SIZE (3 * 1024 * 1024)
+#endif
+
+#ifndef MG_MAX_HTTP_HEADERS
+#define MG_MAX_HTTP_HEADERS 40
+#endif
+
+#ifndef MG_HTTP_INDEX
+#define MG_HTTP_INDEX "index.html"
+#endif
+
+#ifndef MG_PATH_MAX
+#define MG_PATH_MAX PATH_MAX
+#endif
+
+#ifndef MG_SOCK_LISTEN_BACKLOG_SIZE
+#define MG_SOCK_LISTEN_BACKLOG_SIZE 128
+#endif
+
+
+#define MG_ARCH_CUSTOM 0
+#define MG_ARCH_UNIX 1
+#define MG_ARCH_WIN32 2
+#define MG_ARCH_ESP32 3
+#define MG_ARCH_ESP8266 4
+#define MG_ARCH_FREERTOS_TCP 5
+#define MG_ARCH_FREERTOS_LWIP 6
+#define MG_ARCH_AZURERTOS 7
+
+#if !defined(MG_ARCH)
+#if defined(__unix__) || defined(__APPLE__)
+#define MG_ARCH MG_ARCH_UNIX
+#elif defined(_WIN32)
+#define MG_ARCH MG_ARCH_WIN32
+#elif defined(ICACHE_FLASH) || defined(ICACHE_RAM_ATTR)
+#define MG_ARCH MG_ARCH_ESP8266
+#elif defined(ESP_PLATFORM)
+#define MG_ARCH MG_ARCH_ESP32
+#elif defined(FREERTOS_IP_H)
+#define MG_ARCH MG_ARCH_FREERTOS_TCP
+#elif defined(AZURE_RTOS_THREADX)
+#define MG_ARCH MG_ARCH_AZURERTOS
+#endif
+
+#if !defined(MG_ARCH)
+#error "MG_ARCH is not specified and we couldn't guess it."
+#endif
+#endif  // !defined(MG_ARCH)
+
+#if !defined(PRINTF_LIKE)
+#if defined(__GNUC__) || defined(__clang__) || defined(__TI_COMPILER_VERSION__)
+#define PRINTF_LIKE(f, a) __attribute__((format(printf, f, a)))
+#else
+#define PRINTF_LIKE(f, a)
+#endif
+#endif
+
+#if MG_ARCH == MG_ARCH_CUSTOM
+#include <mongoose_custom.h>
+#endif
+
+
+
+
+
+
+
+
+
+#if MG_ARCH == MG_ARCH_AZURERTOS
+
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <time.h>
+#include <stdio.h>
+ 
+#include <tx_api.h>
+#include <fx_api.h>
+
+#include <tx_port.h>
+#include <nx_port.h>
+#include <nx_api.h>
+#include <nx_bsd.h>
+
+#ifdef __REDLIB__
+#define va_copy(d,s)__builtin_va_copy(d,s)
+#endif
+
+#define PATH_MAX FX_MAXIMUM_PATH
+#define MG_DIRSEP '\\'
+
+#define socklen_t int
+#define closesocket(x) soc_close(x)
+#define gmtime_r(a, b) gmtime(a)
+#define MG_INT64_FMT "%lld"
+
+static __inline struct tm *localtime_r(time_t *t, struct tm *tm) {
+  (void) tm;
+  return localtime(t);
+}
+
+#undef FOPEN_MAX
+
+#endif
+
+
+#if MG_ARCH == MG_ARCH_ESP32
+
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <netdb.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+
+#undef MG_PATH_MAX
+#undef MG_ENABLE_DIRLIST
+
+#define MG_DIRSEP '/'
+#define MG_INT64_FMT "%lld"
+#define MG_PATH_MAX 128
+#define MG_ENABLE_DIRLIST 1
+
+#endif
+
+
+#if MG_ARCH == MG_ARCH_ESP8266
+
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <netdb.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <time.h>
+
+#include <esp_system.h>
+
+#undef MG_PATH_MAX
+#undef MG_ENABLE_DIRLIST
+
+#define MG_DIRSEP '/'
+#define MG_INT64_FMT "%lld"
+#define MG_PATH_MAX 128
+#define MG_ENABLE_DIRLIST 1
+
+#endif
+
+
+#if MG_ARCH == MG_ARCH_FREERTOS_LWIP
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+
+#if defined(__GNUC__)
+#include <sys/stat.h>
+#include <sys/time.h>
+#else
+typedef long suseconds_t;
+struct timeval {
+  time_t tv_sec;
+  suseconds_t tv_usec;
+};
+#endif
+
+#include <FreeRTOS.h>
+#include <task.h>
+
+#include <lwip/sockets.h>
+
+#if LWIP_SOCKET != 1
+// Sockets support disabled in LWIP by default
+#error Set LWIP_SOCKET variable to 1 (in lwipopts.h)
+#endif
+
+#if LWIP_POSIX_SOCKETS_IO_NAMES != 0
+// LWIP_POSIX_SOCKETS_IO_NAMES must be disabled in posix-compatible OS
+// enviroment (freertos mimics to one) otherwise names like `read` and `write`
+// conflict
+#error LWIP_POSIX_SOCKETS_IO_NAMES must be set to 0 (in lwipopts.h) for FreeRTOS
+#endif
+
+#define MG_INT64_FMT "%lld"
+#define MG_DIRSEP '/'
+
+// Re-route calloc/free to the FreeRTOS's functions, don't use stdlib
+static inline void *mg_calloc(int cnt, size_t size) {
+  void *p = pvPortMalloc(cnt * size);
+  if (p != NULL) memset(p, 0, size);
+  return p;
+}
+#define calloc(a, b) mg_calloc((a), (b))
+#define free(a) vPortFree(a)
+#define malloc(a) pvPortMalloc(a)
+
+#define gmtime_r(a, b) gmtime(a)
+
+#endif  // MG_ARCH == MG_ARCH_FREERTOS_LWIP
+
+
+#if MG_ARCH == MG_ARCH_FREERTOS_TCP
+
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <time.h>
+
+#include <FreeRTOS.h>
+#include <FreeRTOS_IP.h>
+#include <FreeRTOS_Sockets.h>
+#include <task.h>
+
+#define MG_INT64_FMT "%lld"
+#define MG_DIRSEP '/'
+
+// Why FreeRTOS-TCP did not implement a clean BSD API, but its own thing
+// with FreeRTOS_ prefix, is beyond me
+#define IPPROTO_TCP FREERTOS_IPPROTO_TCP
+#define IPPROTO_UDP FREERTOS_IPPROTO_UDP
+#define AF_INET FREERTOS_AF_INET
+#define SOCK_STREAM FREERTOS_SOCK_STREAM
+#define SOCK_DGRAM FREERTOS_SOCK_DGRAM
+#define SO_BROADCAST 0
+#define SO_ERROR 0
+#define SOL_SOCKET 0
+#define SO_REUSEADDR 0
+#define sockaddr_in freertos_sockaddr
+#define sockaddr freertos_sockaddr
+#define accept(a, b, c) FreeRTOS_accept((a), (b), (c))
+#define connect(a, b, c) FreeRTOS_connect((a), (b), (c))
+#define bind(a, b, c) FreeRTOS_bind((a), (b), (c))
+#define listen(a, b) FreeRTOS_listen((a), (b))
+#define socket(a, b, c) FreeRTOS_socket((a), (b), (c))
+#define send(a, b, c, d) FreeRTOS_send((a), (b), (c), (d))
+#define recv(a, b, c, d) FreeRTOS_recv((a), (b), (c), (d))
+#define setsockopt(a, b, c, d, e) FreeRTOS_setsockopt((a), (b), (c), (d), (e))
+#define sendto(a, b, c, d, e, f) FreeRTOS_sendto((a), (b), (c), (d), (e), (f))
+#define recvfrom(a, b, c, d, e, f) \
+  FreeRTOS_recvfrom((a), (b), (c), (d), (e), (f))
+#define closesocket(x) FreeRTOS_closesocket(x)
+#define gethostbyname(x) FreeRTOS_gethostbyname(x)
+#define getsockname(a, b, c) (-1)
+
+// Re-route calloc/free to the FreeRTOS's functions, don't use stdlib
+static inline void *mg_calloc(int cnt, size_t size) {
+  void *p = pvPortMalloc(cnt * size);
+  if (p != NULL) memset(p, 0, size);
+  return p;
+}
+#define calloc(a, b) mg_calloc((a), (b))
+#define free(a) vPortFree(a)
+#define malloc(a) pvPortMalloc(a)
+
+#define gmtime_r(a, b) gmtime(a)
+
+#if !defined(__GNUC__)
+// copied from GCC on ARM; for some reason useconds are signed
+typedef long suseconds_t;
+struct timeval {
+  time_t tv_sec;
+  suseconds_t tv_usec;
+};
+#endif
+
+#ifndef EINPROGRESS
+#define EINPROGRESS pdFREERTOS_ERRNO_EINPROGRESS
+#endif
+#ifndef EWOULDBLOCK
+#define EWOULDBLOCK pdFREERTOS_ERRNO_EWOULDBLOCK
+#endif
+#ifndef EAGAIN
+#define EAGAIN pdFREERTOS_ERRNO_EAGAIN
+#endif
+#ifndef EINTR
+#define EINTR pdFREERTOS_ERRNO_EINTR
+#endif
+
+#endif  // MG_ARCH == MG_ARCH_FREERTOS_TCP
+
+
+#if MG_ARCH == MG_ARCH_UNIX
+
+#define _DARWIN_UNLIMITED_SELECT 1  // No limit on file descriptors
+
+#include <arpa/inet.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <netdb.h>
+#include <netinet/tcp.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#define MG_DIRSEP '/'
+#define MG_INT64_FMT "%" PRId64
+#undef MG_ENABLE_DIRLIST
+#define MG_ENABLE_DIRLIST 1
+
+#endif
+
+
+#if MG_ARCH == MG_ARCH_WIN32
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+
+#ifndef _CRT_SECURE_NO_WARNINGS
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#ifndef _WINSOCK_DEPRECATED_NO_WARNINGS
+#define _WINSOCK_DEPRECATED_NO_WARNINGS
+#endif
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+
+#if defined(_MSC_VER) && _MSC_VER < 1700
+#define __func__ ""
+typedef __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+typedef unsigned char uint8_t;
+typedef char int8_t;
+typedef unsigned short uint16_t;
+typedef short int16_t;
+typedef unsigned int uint32_t;
+typedef int int32_t;
+typedef enum { false = 0, true = 1 } bool;
+#else
+#include <stdbool.h>
+#include <stdint.h>
+#include <ws2tcpip.h>
+#endif
+
+#include <winsock2.h>
+
+// Protect from calls like std::snprintf in app code
+// See https://github.com/cesanta/mongoose/issues/1047
+#ifndef __cplusplus
+#define snprintf _snprintf
+#define vsnprintf _vsnprintf
+#ifndef strdup  // For MSVC with _DEBUG, see #1359
+#define strdup(x) _strdup(x)
+#endif
+#endif
+
+typedef unsigned suseconds_t;
+typedef int socklen_t;
+#define MG_DIRSEP '\\'
+#ifndef PATH_MAX
+#define PATH_MAX MAX_PATH
+#endif
+#ifndef EINPROGRESS
+#define EINPROGRESS WSAEINPROGRESS
+#endif
+#ifndef EWOULDBLOCK
+#define EWOULDBLOCK WSAEWOULDBLOCK
+#endif
+
+#ifndef va_copy
+#ifdef __va_copy
+#define va_copy __va_copy
+#else
+#define va_copy(x, y) (x) = (y)
+#endif
+#endif
+#ifndef S_ISDIR
+#define S_ISDIR(x) (((x) &_S_IFMT) == _S_IFDIR)
+#endif
+
+#define MG_INT64_FMT "%I64d"
+
+#undef MG_ENABLE_DIRLIST
+#define MG_ENABLE_DIRLIST 1
+
+// https://lgtm.com/rules/2154840805/ -gmtime, localtime, ctime and asctime
+static __inline struct tm *gmtime_r(time_t *t, struct tm *tm) {
+  (void) tm;
+  return gmtime(t);
+}
+
+static __inline struct tm *localtime_r(time_t *t, struct tm *tm) {
+  (void) tm;
+  return localtime(t);
+}
+
+#endif
+
+
+#include <ctype.h>
+#include <string.h>
+
+struct mg_str {
+  const char *ptr;  // Pointer to string data
+  size_t len;       // String len
+};
+
+#define MG_NULL_STR \
+  { NULL, 0 }
+
+// Using macro to avoid shadowing C++ struct constructor, see #1298
+#define mg_str(s) mg_str_s(s)
+
+struct mg_str mg_str(const char *s);
+struct mg_str mg_str_n(const char *s, size_t n);
+int mg_lower(const char *s);
+int mg_ncasecmp(const char *s1, const char *s2, size_t len);
+int mg_casecmp(const char *s1, const char *s2);
+int mg_vcmp(const struct mg_str *s1, const char *s2);
+int mg_vcasecmp(const struct mg_str *str1, const char *str2);
+int mg_strcmp(const struct mg_str str1, const struct mg_str str2);
+struct mg_str mg_strstrip(struct mg_str s);
+struct mg_str mg_strdup(const struct mg_str s);
+const char *mg_strstr(const struct mg_str haystack, const struct mg_str needle);
+
+
+
+
+
+#if MG_ENABLE_LOG
+#define LOG(level, args)                                                   \
+  do {                                                                     \
+    if (mg_log_prefix((level), __FILE__, __LINE__, __func__)) mg_log args; \
+  } while (0)
+enum { LL_NONE, LL_ERROR, LL_INFO, LL_DEBUG, LL_VERBOSE_DEBUG };
+bool mg_log_prefix(int ll, const char *file, int line, const char *fname);
+void mg_log(const char *fmt, ...) PRINTF_LIKE(1, 2);
+void mg_log_set(const char *spec);
+void mg_log_set_callback(void (*fn)(const void *, size_t, void *), void *param);
+#else
+#define LOG(level, args) (void) 0
+#define mg_log_set(x) (void) (x)
+#endif
+
+
+struct mg_timer {
+  unsigned long period_ms;  // Timer period in milliseconds
+  unsigned long expire;     // Expiration timestamp in milliseconds
+  unsigned flags;           // Possible flags values below
+#define MG_TIMER_REPEAT 1   // Call function periodically, otherwise run once
+#define MG_TIMER_RUN_NOW 2  // Call immediately when timer is set
+  void (*fn)(void *);       // Function to call
+  void *arg;                // Function argument
+  struct mg_timer *next;    // Linkage in g_timers list
+};
+
+extern struct mg_timer *g_timers;  // Global list of timers
+
+void mg_timer_init(struct mg_timer *, unsigned long ms, unsigned,
+                   void (*fn)(void *), void *);
+void mg_timer_free(struct mg_timer *);
+void mg_timer_poll(unsigned long current_time_ms);
+
+
+
+
+
+char *mg_file_read(const char *path, size_t *size);
+bool mg_file_write(const char *path, const void *buf, size_t len);
+bool mg_file_printf(const char *path, const char *fmt, ...);
+void mg_random(void *buf, size_t len);
+bool mg_globmatch(const char *pattern, size_t plen, const char *s, size_t n);
+bool mg_commalist(struct mg_str *s, struct mg_str *k, struct mg_str *v);
+uint16_t mg_ntohs(uint16_t net);
+uint32_t mg_ntohl(uint32_t net);
+uint32_t mg_crc32(uint32_t crc, const char *buf, size_t len);
+char *mg_hexdump(const void *buf, size_t len);
+char *mg_hex(const void *buf, size_t len, char *dst);
+void mg_unhex(const char *buf, size_t len, unsigned char *to);
+unsigned long mg_unhexn(const char *s, size_t len);
+int mg_asprintf(char **buf, size_t size, const char *fmt, ...);
+int mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap);
+int64_t mg_to64(struct mg_str str);
+int mg_check_ip_acl(struct mg_str acl, uint32_t remote_ip);
+double mg_time(void);
+unsigned long mg_millis(void);
+void mg_usleep(unsigned long usecs);
+
+#define mg_htons(x) mg_ntohs(x)
+#define mg_htonl(x) mg_ntohl(x)
+
+#ifndef EXTERN_C
+#ifdef __cplusplus
+#define EXTERN_C extern "C"
+#else
+#define EXTERN_C
+#endif
+#endif
+
+// Expands to a string representation of its argument: e.g.
+// MG_STRINGIFY_LITERAL(5) expands to "5"
+#if !defined(_MSC_VER) || _MSC_VER >= 1900
+#define MG_STRINGIFY_LITERAL(...) #__VA_ARGS__
+#else
+#define MG_STRINGIFY_LITERAL(x) #x
+#endif
+// Expands to a string representation of its argument, which can be a macro:
+// #define FOO 123
+// MG_STRINGIFY_MACRO(FOO)  // Expands to 123
+#define MG_STRINGIFY_MACRO(x) MG_STRINGIFY_LITERAL(x)
+
+// Linked list management macros
+#define LIST_ADD_HEAD(type_, head_, elem_) \
+  do {                                     \
+    (elem_)->next = (*head_);              \
+    *(head_) = (elem_);                    \
+  } while (0)
+
+#define LIST_ADD_TAIL(type_, head_, elem_) \
+  do {                                     \
+    type_ **h = head_;                     \
+    while (*h != NULL) h = &(*h)->next;    \
+    *h = (elem_);                          \
+  } while (0)
+
+#define LIST_DELETE(type_, head_, elem_)   \
+  do {                                     \
+    type_ **h = head_;                     \
+    while (*h != (elem_)) h = &(*h)->next; \
+    *h = (elem_)->next;                    \
+  } while (0)
+
+
+
+
+enum { MG_FS_READ = 1, MG_FS_WRITE = 2, MG_FS_DIR = 4 };
+
+// Filesystem API functions
+// stat() returns MG_FS_* flags and populates file size and modification time
+// list() calls fn() for every directory entry, allowing to list a directory
+struct mg_fs {
+  int (*stat)(const char *path, size_t *size, time_t *mtime);
+  void (*list)(const char *path, void (*fn)(const char *, void *), void *);
+  struct mg_fd *(*open)(const char *path, int flags);      // Open file
+  void (*close)(struct mg_fd *fd);                         // Close file
+  size_t (*read)(void *fd, void *buf, size_t len);         // Read file
+  size_t (*write)(void *fd, const void *buf, size_t len);  // Write file
+  size_t (*seek)(void *fd, size_t offset);                 // Set file position
+};
+
+// File descriptor
+struct mg_fd {
+  void *fd;
+  struct mg_fs *fs;
+};
+
+extern struct mg_fs mg_fs_posix;   // POSIX open/close/read/write/seek
+extern struct mg_fs mg_fs_packed;  // Packed FS, see examples/complete
+
+
+
+unsigned short mg_url_port(const char *url);
+int mg_url_is_ssl(const char *url);
+struct mg_str mg_url_host(const char *url);
+struct mg_str mg_url_user(const char *url);
+struct mg_str mg_url_pass(const char *url);
+const char *mg_url_uri(const char *url);
+
+
+#include <stddef.h>
+
+struct mg_iobuf {
+  unsigned char *buf;  // Pointer to stored data
+  size_t size;         // Total size available
+  size_t len;          // Current number of bytes
+};
+
+int mg_iobuf_init(struct mg_iobuf *, size_t);
+int mg_iobuf_resize(struct mg_iobuf *, size_t);
+void mg_iobuf_free(struct mg_iobuf *);
+size_t mg_iobuf_add(struct mg_iobuf *, size_t, const void *, size_t, size_t);
+size_t mg_iobuf_del(struct mg_iobuf *, size_t ofs, size_t len);
+
+int mg_base64_update(unsigned char p, char *to, int len);
+int mg_base64_final(char *to, int len);
+int mg_base64_encode(const unsigned char *p, int n, char *to);
+int mg_base64_decode(const char *src, int n, char *dst);
+
+
+
+
+typedef struct {
+  uint32_t buf[4];
+  uint32_t bits[2];
+  unsigned char in[64];
+} mg_md5_ctx;
+
+void mg_md5_init(mg_md5_ctx *c);
+void mg_md5_update(mg_md5_ctx *c, const unsigned char *data, size_t len);
+void mg_md5_final(mg_md5_ctx *c, unsigned char[16]);
+
+
+
+
+typedef struct {
+  uint32_t state[5];
+  uint32_t count[2];
+  unsigned char buffer[64];
+} mg_sha1_ctx;
+
+void mg_sha1_init(mg_sha1_ctx *);
+void mg_sha1_update(mg_sha1_ctx *, const unsigned char *data, size_t len);
+void mg_sha1_final(unsigned char digest[20], mg_sha1_ctx *);
+void mg_hmac_sha1(const unsigned char *key, size_t key_len,
+                  const unsigned char *text, size_t text_len,
+                  unsigned char out[20]);
+
+
+struct mg_connection;
+typedef void (*mg_event_handler_t)(struct mg_connection *, int ev,
+                                   void *ev_data, void *fn_data);
+void mg_call(struct mg_connection *c, int ev, void *ev_data);
+void mg_error(struct mg_connection *c, const char *fmt, ...);
+
+enum {
+  MG_EV_ERROR,       // Error                        char *error_message
+  MG_EV_OPEN,        // Connection created           NULL
+  MG_EV_POLL,        // mg_mgr_poll iteration        unsigned long *millis
+  MG_EV_RESOLVE,     // Host name is resolved        NULL
+  MG_EV_CONNECT,     // Connection established       NULL
+  MG_EV_ACCEPT,      // Connection accepted          NULL
+  MG_EV_READ,        // Data received from socket    struct mg_str *
+  MG_EV_WRITE,       // Data written to socket       long *bytes_written
+  MG_EV_CLOSE,       // Connection closed            NULL
+  MG_EV_HTTP_MSG,    // HTTP request/response        struct mg_http_message *
+  MG_EV_HTTP_CHUNK,  // HTTP chunk (partial msg)     struct mg_http_message *
+  MG_EV_WS_OPEN,     // Websocket handshake done     struct mg_http_message *
+  MG_EV_WS_MSG,      // Websocket msg, text or bin   struct mg_ws_message *
+  MG_EV_WS_CTL,      // Websocket control msg        struct mg_ws_message *
+  MG_EV_MQTT_CMD,    // MQTT low-level command       struct mg_mqtt_message *
+  MG_EV_MQTT_MSG,    // MQTT PUBLISH received        struct mg_mqtt_message *
+  MG_EV_MQTT_OPEN,   // MQTT CONNACK received        int *connack_status_code
+  MG_EV_SNTP_TIME,   // SNTP time received           struct timeval *
+  MG_EV_USER,        // Starting ID for user events
+};
+
+
+
+
+
+
+
+struct mg_dns {
+  const char *url;          // DNS server URL
+  struct mg_connection *c;  // DNS server connection
+};
+
+struct mg_addr {
+  uint16_t port;    // TCP or UDP port in network byte order
+  uint32_t ip;      // IP address in network byte order
+  uint8_t ip6[16];  // IPv6 address
+  bool is_ip6;      // True when address is IPv6 address
+};
+
+struct mg_mgr {
+  struct mg_connection *conns;  // List of active connections
+  struct mg_dns dns4;           // DNS for IPv4
+  struct mg_dns dns6;           // DNS for IPv6
+  int dnstimeout;               // DNS resolve timeout in milliseconds
+  unsigned long nextid;         // Next connection ID
+  void *userdata;               // Arbitrary user data pointer
+#if MG_ARCH == MG_ARCH_FREERTOS_TCP
+  SocketSet_t ss;  // NOTE(lsm): referenced from socket struct
+#endif
+};
+
+struct mg_connection {
+  struct mg_connection *next;  // Linkage in struct mg_mgr :: connections
+  struct mg_mgr *mgr;          // Our container
+  struct mg_addr peer;         // Remote address. For listeners, local address
+  void *fd;                    // Connected socket, or LWIP data
+  unsigned long id;            // Auto-incrementing unique connection ID
+  struct mg_iobuf recv;        // Incoming data
+  struct mg_iobuf send;        // Outgoing data
+  mg_event_handler_t fn;       // User-specified event handler function
+  void *fn_data;               // User-specified function parameter
+  mg_event_handler_t pfn;      // Protocol-specific handler function
+  void *pfn_data;              // Protocol-specific function parameter
+  char label[50];              // Arbitrary label
+  void *tls;                   // TLS specific data
+  unsigned is_listening : 1;   // Listening connection
+  unsigned is_client : 1;      // Outbound (client) connection
+  unsigned is_accepted : 1;    // Accepted (server) connection
+  unsigned is_resolving : 1;   // Non-blocking DNS resolution is in progress
+  unsigned is_connecting : 1;  // Non-blocking connect is in progress
+  unsigned is_tls : 1;         // TLS-enabled connection
+  unsigned is_tls_hs : 1;      // TLS handshake is in progress
+  unsigned is_udp : 1;         // UDP connection
+  unsigned is_websocket : 1;   // WebSocket connection
+  unsigned is_hexdumping : 1;  // Hexdump in/out traffic
+  unsigned is_draining : 1;    // Send remaining data, then close and free
+  unsigned is_closing : 1;     // Close and free the connection immediately
+  unsigned is_readable : 1;    // Connection is ready to read
+  unsigned is_writable : 1;    // Connection is ready to write
+};
+
+void mg_mgr_poll(struct mg_mgr *, int ms);
+void mg_mgr_init(struct mg_mgr *);
+void mg_mgr_free(struct mg_mgr *);
+
+struct mg_connection *mg_listen(struct mg_mgr *, const char *url,
+                                mg_event_handler_t fn, void *fn_data);
+struct mg_connection *mg_connect(struct mg_mgr *, const char *url,
+                                 mg_event_handler_t fn, void *fn_data);
+void mg_connect_resolved(struct mg_connection *);
+bool mg_send(struct mg_connection *, const void *, size_t);
+int mg_printf(struct mg_connection *, const char *fmt, ...);
+int mg_vprintf(struct mg_connection *, const char *fmt, va_list ap);
+char *mg_straddr(struct mg_connection *, char *, size_t);
+bool mg_aton(struct mg_str str, struct mg_addr *addr);
+char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len);
+
+struct mg_connection *mg_mkpipe(struct mg_mgr *, mg_event_handler_t, void *);
+void mg_mgr_wakeup(struct mg_connection *pipe);
+
+
+
+
+
+
+
+struct mg_http_header {
+  struct mg_str name;   // Header name
+  struct mg_str value;  // Header value
+};
+
+struct mg_http_message {
+  struct mg_str method, uri, query, proto;             // Request/response line
+  struct mg_http_header headers[MG_MAX_HTTP_HEADERS];  // Headers
+  struct mg_str body;                                  // Body
+  struct mg_str head;                                  // Request + headers
+  struct mg_str chunk;    // Chunk for chunked encoding,  or partial body
+  struct mg_str message;  // Request + headers + body
+};
+
+// Parameter for mg_http_serve_dir()
+struct mg_http_serve_opts {
+  const char *root_dir;       // Web root directory, must be non-NULL
+  const char *ssi_pattern;    // SSI file name pattern, e.g. #.shtml
+  const char *extra_headers;  // Extra HTTP headers to add in responses
+  const char *mime_types;     // Extra mime types, ext1=type1,ext2=type2,..
+  struct mg_fs *fs;           // Filesystem implementation. Use NULL for POSIX
+};
+
+// Parameter for mg_http_next_multipart
+struct mg_http_part {
+  struct mg_str name;      // Form field name
+  struct mg_str filename;  // Filename for file uploads
+  struct mg_str body;      // Part contents
+};
+
+int mg_http_parse(const char *s, size_t len, struct mg_http_message *);
+int mg_http_get_request_len(const unsigned char *buf, size_t buf_len);
+void mg_http_printf_chunk(struct mg_connection *cnn, const char *fmt, ...);
+void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len);
+void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm);
+struct mg_connection *mg_http_listen(struct mg_mgr *, const char *url,
+                                     mg_event_handler_t fn, void *fn_data);
+struct mg_connection *mg_http_connect(struct mg_mgr *, const char *url,
+                                      mg_event_handler_t fn, void *fn_data);
+void mg_http_serve_dir(struct mg_connection *, struct mg_http_message *hm,
+                       struct mg_http_serve_opts *opts);
+void mg_http_serve_file(struct mg_connection *, struct mg_http_message *hm,
+                        const char *path, struct mg_http_serve_opts *opts);
+void mg_http_reply(struct mg_connection *, int status_code, const char *headers,
+                   const char *body_fmt, ...);
+struct mg_str *mg_http_get_header(struct mg_http_message *, const char *name);
+int mg_http_get_var(const struct mg_str *, const char *name, char *, size_t);
+int mg_url_decode(const char *s, size_t n, char *to, size_t to_len, int form);
+size_t mg_url_encode(const char *s, size_t n, char *buf, size_t len);
+void mg_http_creds(struct mg_http_message *, char *, size_t, char *, size_t);
+bool mg_http_match_uri(const struct mg_http_message *, const char *glob);
+int mg_http_upload(struct mg_connection *, struct mg_http_message *hm,
+                   const char *dir);
+void mg_http_bauth(struct mg_connection *, const char *user, const char *pass);
+struct mg_str mg_http_get_header_var(struct mg_str s, struct mg_str v);
+size_t mg_http_next_multipart(struct mg_str, size_t, struct mg_http_part *);
+
+
+void mg_http_serve_ssi(struct mg_connection *c, const char *root,
+                       const char *fullpath);
+
+
+
+
+
+
+struct mg_tls_opts {
+  const char *ca;         // CA certificate file. For both listeners and clients
+  const char *crl;        // Certificate Revocation List. For clients
+  const char *cert;       // Certificate
+  const char *certkey;    // Certificate key
+  const char *ciphers;    // Cipher list
+  struct mg_str srvname;  // If not empty, enables server name verification
+};
+
+void mg_tls_init(struct mg_connection *, struct mg_tls_opts *);
+void mg_tls_free(struct mg_connection *);
+long mg_tls_send(struct mg_connection *, const void *buf, size_t len);
+long mg_tls_recv(struct mg_connection *, void *buf, size_t len);
+void mg_tls_handshake(struct mg_connection *);
+
+
+#if MG_ENABLE_MBEDTLS
+
+
+
+
+#include <mbedtls/debug.h>
+#include <mbedtls/ssl.h>
+
+#if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x03000000
+#define RNG , rng_get, NULL
+#else
+#define RNG
+#endif
+
+// Different versions have those in different files, so declare here
+EXTERN_C int mbedtls_net_recv(void *, unsigned char *, size_t);
+EXTERN_C int mbedtls_net_send(void *, const unsigned char *, size_t);
+
+struct mg_tls {
+  char *cafile;             // CA certificate path
+  mbedtls_x509_crt ca;      // Parsed CA certificate
+  mbedtls_x509_crl crl;     // Parsed Certificate Revocation List
+  mbedtls_x509_crt cert;    // Parsed certificate
+  mbedtls_ssl_context ssl;  // SSL/TLS context
+  mbedtls_ssl_config conf;  // SSL-TLS config
+  mbedtls_pk_context pk;    // Private key context
+};
+#endif
+
+
+#if MG_ENABLE_OPENSSL
+
+#include <openssl/err.h>
+#include <openssl/ssl.h>
+
+struct mg_tls {
+  SSL_CTX *ctx;
+  SSL *ssl;
+};
+#endif
+
+
+#define WEBSOCKET_OP_CONTINUE 0
+#define WEBSOCKET_OP_TEXT 1
+#define WEBSOCKET_OP_BINARY 2
+#define WEBSOCKET_OP_CLOSE 8
+#define WEBSOCKET_OP_PING 9
+#define WEBSOCKET_OP_PONG 10
+
+
+
+struct mg_ws_message {
+  struct mg_str data;  // Websocket message data
+  uint8_t flags;       // Websocket message flags
+};
+
+struct mg_connection *mg_ws_connect(struct mg_mgr *, const char *url,
+                                    mg_event_handler_t fn, void *fn_data,
+                                    const char *fmt, ...);
+void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
+                   const char *fmt, ...);
+size_t mg_ws_send(struct mg_connection *, const char *buf, size_t len, int op);
+size_t mg_ws_wrap(struct mg_connection *, size_t len, int op);
+
+
+
+
+struct mg_connection *mg_sntp_connect(struct mg_mgr *mgr, const char *url,
+                                      mg_event_handler_t fn, void *fn_data);
+void mg_sntp_send(struct mg_connection *c, unsigned long utc);
+int mg_sntp_parse(const unsigned char *buf, size_t len, struct timeval *tv);
+
+
+
+
+
+#define MQTT_CMD_CONNECT 1
+#define MQTT_CMD_CONNACK 2
+#define MQTT_CMD_PUBLISH 3
+#define MQTT_CMD_PUBACK 4
+#define MQTT_CMD_PUBREC 5
+#define MQTT_CMD_PUBREL 6
+#define MQTT_CMD_PUBCOMP 7
+#define MQTT_CMD_SUBSCRIBE 8
+#define MQTT_CMD_SUBACK 9
+#define MQTT_CMD_UNSUBSCRIBE 10
+#define MQTT_CMD_UNSUBACK 11
+#define MQTT_CMD_PINGREQ 12
+#define MQTT_CMD_PINGRESP 13
+#define MQTT_CMD_DISCONNECT 14
+
+struct mg_mqtt_opts {
+  struct mg_str user;          // Username, can be empty
+  struct mg_str pass;          // Password, can be empty
+  struct mg_str client_id;     // Client ID
+  struct mg_str will_topic;    // Will topic
+  struct mg_str will_message;  // Will message
+  uint8_t qos;                 // Quality of service
+  bool will_retain;            // Retain last will
+  bool clean;                  // Use clean session, 0 or 1
+  uint16_t keepalive;          // Keep-alive timer in seconds
+};
+
+struct mg_mqtt_message {
+  struct mg_str topic;  // Parsed topic
+  struct mg_str data;   // Parsed message
+  struct mg_str dgram;  // Whole MQTT datagram, including headers
+  uint16_t id;  // Set for PUBACK, PUBREC, PUBREL, PUBCOMP, SUBACK, PUBLISH
+  uint8_t cmd;  // MQTT command, one of MQTT_CMD_*
+  uint8_t qos;  // Quality of service
+  uint8_t ack;  // Connack return code. 0 - success
+};
+
+struct mg_connection *mg_mqtt_connect(struct mg_mgr *, const char *url,
+                                      struct mg_mqtt_opts *opts,
+                                      mg_event_handler_t fn, void *fn_data);
+struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
+                                     mg_event_handler_t fn, void *fn_data);
+void mg_mqtt_login(struct mg_connection *c, struct mg_mqtt_opts *opts);
+void mg_mqtt_pub(struct mg_connection *c, struct mg_str *topic,
+                 struct mg_str *data, int qos, bool retain);
+void mg_mqtt_sub(struct mg_connection *, struct mg_str *topic, int qos);
+int mg_mqtt_parse(const uint8_t *buf, size_t len, struct mg_mqtt_message *m);
+void mg_mqtt_send_header(struct mg_connection *, uint8_t cmd, uint8_t flags,
+                         uint32_t len);
+size_t mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                        uint8_t *qos, size_t pos);
+size_t mg_mqtt_next_unsub(struct mg_mqtt_message *msg, struct mg_str *topic,
+                          size_t pos);
+void mg_mqtt_ping(struct mg_connection *);
+void mg_mqtt_pong(struct mg_connection *);
+void mg_mqtt_disconnect(struct mg_connection *);
+
+
+
+
+
+// Mongoose sends DNS queries that contain only one question:
+// either A (IPv4) or AAAA (IPv6) address lookup.
+// Therefore, we expect zero or one answer.
+// If `resolved` is true, then `addr` contains resolved IPv4 or IPV6 address.
+struct mg_dns_message {
+  uint16_t txnid;       // Transaction ID
+  bool resolved;        // Resolve successful, addr is set
+  struct mg_addr addr;  // Resolved address
+  char name[256];       // Host name
+};
+
+struct mg_dns_header {
+  uint16_t txnid;  // Transaction ID
+  uint16_t flags;
+  uint16_t num_questions;
+  uint16_t num_answers;
+  uint16_t num_authority_prs;
+  uint16_t num_other_prs;
+};
+
+// DNS resource record
+struct mg_dns_rr {
+  uint16_t nlen;    // Name or pointer length
+  uint16_t atype;   // Address type
+  uint16_t aclass;  // Address class
+  uint16_t alen;    // Address length
+};
+
+void mg_resolve(struct mg_connection *, struct mg_str *, int);
+void mg_resolve_cancel(struct mg_connection *);
+bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *);
+size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs,
+                       bool is_question, struct mg_dns_rr *);
+size_t mg_dns_decode_name(const uint8_t *, size_t, size_t, char *, size_t);
+
+#ifdef __cplusplus
+}
+#endif
+#endif  // MONGOOSE_H