Remove tunneling from mongoose

CL: Mongoose Web Server: Remove tunneling functionality which was used by nobody

PUBLISHED_FROM=38b9e8ae7b0a5a1dbba5cff4074843dc681267d3

docs/c-api/net.h/struct_mg_connection.md

@@ -53,7 +53,6 @@ signature: |
   #define MG_F_WEBSOCKET_NO_DEFRAG (1 << 12) /* Websocket specific */
   #define MG_F_DELETE_CHUNK (1 << 13)        /* HTTP specific */
   #define MG_F_ENABLE_BROADCAST (1 << 14)    /* Allow broadcast address usage */
-  #define MG_F_TUN_DO_NOT_RECONNECT (1 << 15) /* Don't reconnect tunnel */
   
   #define MG_F_USER_1 (1 << 20) /* Flags left for application */
   #define MG_F_USER_2 (1 << 21)

mongoose.h

@@ -3157,10 +3157,6 @@ struct {								\
   (CS_PLATFORM == CS_P_WINDOWS || CS_PLATFORM == CS_P_UNIX)
 #endif
 
-#ifndef MG_ENABLE_TUN
-#define MG_ENABLE_TUN MG_ENABLE_HTTP_WEBSOCKET
-#endif
-
 #ifndef MG_ENABLE_SNTP
 #define MG_ENABLE_SNTP 0
 #endif
@@ -3524,7 +3520,6 @@ struct mg_connection {
 #define MG_F_WEBSOCKET_NO_DEFRAG (1 << 12) /* Websocket specific */
 #define MG_F_DELETE_CHUNK (1 << 13)        /* HTTP specific */
 #define MG_F_ENABLE_BROADCAST (1 << 14)    /* Allow broadcast address usage */
-#define MG_F_TUN_DO_NOT_RECONNECT (1 << 15) /* Don't reconnect tunnel */
 
 #define MG_F_USER_1 (1 << 20) /* Flags left for application */
 #define MG_F_USER_2 (1 << 21)

src/features.h

@@ -153,10 +153,6 @@
   (CS_PLATFORM == CS_P_WINDOWS || CS_PLATFORM == CS_P_UNIX)
 #endif
 
-#ifndef MG_ENABLE_TUN
-#define MG_ENABLE_TUN MG_ENABLE_HTTP_WEBSOCKET
-#endif
-
 #ifndef MG_ENABLE_SNTP
 #define MG_ENABLE_SNTP 0
 #endif

src/modules.mk

@@ -59,15 +59,12 @@ SOURCES = $(COMMON)/mg_mem.h \
           $(COMMON)/mbuf.c \
           $(COMMON)/mg_str.c \
           $(COMMON)/str_util.c \
-          tun.h \
           net.c \
           net_if_socket.h \
-          net_if_tun.h \
           net_if_socks.h \
           net_if.c \
           net_if_socket.c \
           net_if_socks.c \
-          net_if_tun.c \
           ssl_if_openssl.c \
           ssl_if_mbedtls.c \
           uri.c \
@@ -83,7 +80,6 @@ SOURCES = $(COMMON)/mg_mem.h \
           dns_server.c \
           resolv.c \
           coap.c \
-          tun.c \
           sntp.c \
           socks.c \
           $(COMMON)/platforms/cc3200/cc3200_libc.c \

src/net.c

@@ -20,7 +20,6 @@
 #include "mongoose/src/dns.h"
 #include "mongoose/src/internal.h"
 #include "mongoose/src/resolv.h"
-#include "mongoose/src/tun.h"
 #include "mongoose/src/util.h"
 
 #define MG_MAX_HOST_LEN 200
@@ -816,13 +815,6 @@ struct mg_connection *mg_bind_opt(struct mg_mgr *mgr, const char *address,
 
   MG_COPY_COMMON_CONNECTION_OPTIONS(&add_sock_opts, &opts);
 
-#if MG_ENABLE_TUN
-  if (mg_strncmp(mg_mk_str(address), mg_mk_str("ws://"), 5) == 0 ||
-      mg_strncmp(mg_mk_str(address), mg_mk_str("wss://"), 6) == 0) {
-    return mg_tun_bind_opt(mgr, address, MG_CB(callback, user_data), opts);
-  }
-#endif
-
   if (mg_parse_address(address, &sa, &proto, host, sizeof(host)) <= 0) {
     MG_SET_PTRPTR(opts.error_string, "cannot parse address");
     return NULL;

src/net.h

@@ -146,7 +146,6 @@ struct mg_connection {
 #define MG_F_WEBSOCKET_NO_DEFRAG (1 << 12) /* Websocket specific */
 #define MG_F_DELETE_CHUNK (1 << 13)        /* HTTP specific */
 #define MG_F_ENABLE_BROADCAST (1 << 14)    /* Allow broadcast address usage */
-#define MG_F_TUN_DO_NOT_RECONNECT (1 << 15) /* Don't reconnect tunnel */
 
 #define MG_F_USER_1 (1 << 20) /* Flags left for application */
 #define MG_F_USER_2 (1 << 21)

src/net_if.c

 #include "mongoose/src/net_if.h"
 #include "mongoose/src/internal.h"
 #include "mongoose/src/net_if_socket.h"
-#include "mongoose/src/net_if_tun.h"
 
 extern const struct mg_iface_vtable mg_default_iface_vtable;
 
 const struct mg_iface_vtable *mg_ifaces[] = {
     &mg_default_iface_vtable,
-#if MG_ENABLE_TUN
-    &mg_tun_iface_vtable,
-#endif
 };
 
 int mg_num_ifaces = (int) (sizeof(mg_ifaces) / sizeof(mg_ifaces[0]));

src/net_if_tun.c

-/*
- * Copyright (c) 2014-2016 Cesanta Software Limited
- * All rights reserved
- */
-
-#if MG_ENABLE_TUN
-
-#include "common/cs_dbg.h"
-#include "common/cs_time.h"
-#include "mongoose/src/internal.h"
-#include "mongoose/src/net_if_tun.h"
-#include "mongoose/src/tun.h"
-#include "mongoose/src/util.h"
-
-#define MG_TCP_RECV_BUFFER_SIZE 1024
-#define MG_UDP_RECV_BUFFER_SIZE 1500
-
-void mg_tun_if_connect_tcp(struct mg_connection *nc,
-                           const union socket_address *sa) {
-  (void) nc;
-  (void) sa;
-}
-
-void mg_tun_if_connect_udp(struct mg_connection *nc) {
-  (void) nc;
-}
-
-int mg_tun_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) {
-  (void) nc;
-  (void) sa;
-  return 0;
-}
-
-int mg_tun_if_listen_udp(struct mg_connection *nc, union socket_address *sa) {
-  (void) nc;
-  (void) sa;
-  return -1;
-}
-
-void mg_tun_if_tcp_send(struct mg_connection *nc, const void *buf, size_t len) {
-  struct mg_tun_client *client = (struct mg_tun_client *) nc->iface->data;
-  uint32_t stream_id = (uint32_t)(uintptr_t) nc->mgr_data;
-  struct mg_str msg = {(char *) buf, len};
-#if MG_ENABLE_HEXDUMP
-  char hex[512];
-  mg_hexdump(buf, len, hex, sizeof(hex));
-  LOG(LL_DEBUG, ("sending to stream 0x%x:\n%s", (unsigned int) stream_id, hex));
-#endif
-
-  mg_tun_send_frame(client->disp, stream_id, MG_TUN_DATA_FRAME, 0, msg);
-}
-
-void mg_tun_if_udp_send(struct mg_connection *nc, const void *buf, size_t len) {
-  (void) nc;
-  (void) buf;
-  (void) len;
-}
-
-void mg_tun_if_recved(struct mg_connection *nc, size_t len) {
-  (void) nc;
-  (void) len;
-}
-
-int mg_tun_if_create_conn(struct mg_connection *nc) {
-  (void) nc;
-  return 1;
-}
-
-void mg_tun_if_destroy_conn(struct mg_connection *nc) {
-  struct mg_tun_client *client = (struct mg_tun_client *) nc->iface->data;
-
-  if (nc->flags & MG_F_LISTENING) {
-    mg_tun_destroy_client(client);
-  } else if (client->disp) {
-    uint32_t stream_id = (uint32_t)(uintptr_t) nc->mgr_data;
-    struct mg_str msg = {NULL, 0};
-
-    LOG(LL_DEBUG, ("closing 0x%x:", (unsigned int) stream_id));
-    mg_tun_send_frame(client->disp, stream_id, MG_TUN_DATA_FRAME,
-                      MG_TUN_F_END_STREAM, msg);
-  }
-}
-
-/* Associate a socket to a connection. */
-void mg_tun_if_sock_set(struct mg_connection *nc, sock_t sock) {
-  (void) nc;
-  (void) sock;
-}
-
-void mg_tun_if_init(struct mg_iface *iface) {
-  (void) iface;
-}
-
-void mg_tun_if_free(struct mg_iface *iface) {
-  (void) iface;
-}
-
-void mg_tun_if_add_conn(struct mg_connection *nc) {
-  nc->sock = INVALID_SOCKET;
-}
-
-void mg_tun_if_remove_conn(struct mg_connection *nc) {
-  (void) nc;
-}
-
-time_t mg_tun_if_poll(struct mg_iface *iface, int timeout_ms) {
-  (void) iface;
-  (void) timeout_ms;
-  return (time_t) cs_time();
-}
-
-void mg_tun_if_get_conn_addr(struct mg_connection *nc, int remote,
-                             union socket_address *sa) {
-  (void) nc;
-  (void) remote;
-  (void) sa;
-}
-
-struct mg_connection *mg_tun_if_find_conn(struct mg_tun_client *client,
-                                          uint32_t stream_id) {
-  struct mg_connection *nc = NULL;
-
-  for (nc = client->mgr->active_connections; nc != NULL; nc = nc->next) {
-    if (nc->iface != client->iface || (nc->flags & MG_F_LISTENING)) {
-      continue;
-    }
-    if (stream_id == (uint32_t)(uintptr_t) nc->mgr_data) {
-      return nc;
-    }
-  }
-
-  if (stream_id > client->last_stream_id) {
-    /* create a new connection */
-    LOG(LL_DEBUG, ("new stream 0x%x, accepting", (unsigned int) stream_id));
-    nc = mg_if_accept_new_conn(client->listener);
-    nc->mgr_data = (void *) (uintptr_t) stream_id;
-    client->last_stream_id = stream_id;
-  } else {
-    LOG(LL_DEBUG,
-        ("Ignoring stream 0x%x (last_stream_id 0x%x)", (unsigned int) stream_id,
-         (unsigned int) client->last_stream_id));
-  }
-
-  return nc;
-}
-
-/* clang-format off */
-#define MG_TUN_IFACE_VTABLE                                             \
-  {                                                                     \
-    mg_tun_if_init,                                                     \
-    mg_tun_if_free,                                                     \
-    mg_tun_if_add_conn,                                                 \
-    mg_tun_if_remove_conn,                                              \
-    mg_tun_if_poll,                                                     \
-    mg_tun_if_listen_tcp,                                               \
-    mg_tun_if_listen_udp,                                               \
-    mg_tun_if_connect_tcp,                                              \
-    mg_tun_if_connect_udp,                                              \
-    mg_tun_if_tcp_send,                                                 \
-    mg_tun_if_udp_send,                                                 \
-    mg_tun_if_recved,                                                   \
-    mg_tun_if_create_conn,                                              \
-    mg_tun_if_destroy_conn,                                             \
-    mg_tun_if_sock_set,                                                 \
-    mg_tun_if_get_conn_addr,                                            \
-  }
-/* clang-format on */
-
-const struct mg_iface_vtable mg_tun_iface_vtable = MG_TUN_IFACE_VTABLE;
-
-#endif /* MG_ENABLE_TUN */

src/net_if_tun.h

-/*
- * Copyright (c) 2014-2016 Cesanta Software Limited
- * All rights reserved
- */
-
-#ifndef CS_MONGOOSE_SRC_NET_IF_TUN_H_
-#define CS_MONGOOSE_SRC_NET_IF_TUN_H_
-
-#if MG_ENABLE_TUN
-
-#include "mongoose/src/net_if.h"
-
-struct mg_tun_client;
-
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-extern const struct mg_iface_vtable mg_tun_iface_vtable;
-
-struct mg_connection *mg_tun_if_find_conn(struct mg_tun_client *client,
-                                          uint32_t stream_id);
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-
-#endif /* MG_ENABLE_TUN */
-
-#endif /* CS_MONGOOSE_SRC_NET_IF_TUN_H_ */

src/tun.h

-/*
- * Copyright (c) 2014-2016 Cesanta Software Limited
- * All rights reserved
- */
-
-#ifndef CS_MONGOOSE_SRC_TUN_H_
-#define CS_MONGOOSE_SRC_TUN_H_
-
-#if MG_ENABLE_TUN
-
-#include "mongoose/src/net.h"
-#include "common/mg_str.h"
-
-#ifndef MG_TUN_RECONNECT_INTERVAL
-#define MG_TUN_RECONNECT_INTERVAL 1
-#endif
-
-#define MG_TUN_PROTO_NAME "mg_tun"
-
-#define MG_TUN_DATA_FRAME 0x0
-#define MG_TUN_F_END_STREAM 0x1
-
-/*
- * MG TUN frame format is loosely based on HTTP/2.
- * However since the communication happens via WebSocket
- * there is no need to encode the frame length, since that's
- * solved by WebSocket framing.
- *
- * TODO(mkm): Detailed description of the protocol.
- */
-struct mg_tun_frame {
-  uint8_t type;
-  uint8_t flags;
-  uint32_t stream_id; /* opaque stream identifier */
-  struct mg_str body;
-};
-
-struct mg_tun_ssl_opts {
-#if MG_ENABLE_SSL
-  const char *ssl_cert;
-  const char *ssl_key;
-  const char *ssl_ca_cert;
-#else
-  int dummy; /* some compilers don't like empty structs */
-#endif
-};
-
-struct mg_tun_client {
-  struct mg_mgr *mgr;
-  struct mg_iface *iface;
-  const char *disp_url;
-  struct mg_tun_ssl_opts ssl;
-
-  uint32_t last_stream_id; /* stream id of most recently accepted connection */
-
-  struct mg_connection *disp;
-  struct mg_connection *listener;
-  struct mg_connection *reconnect;
-};
-
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-struct mg_connection *mg_tun_bind_opt(struct mg_mgr *mgr,
-                                      const char *dispatcher,
-                                      MG_CB(mg_event_handler_t handler,
-                                            void *user_data),
-                                      struct mg_bind_opts opts);
-
-int mg_tun_parse_frame(void *data, size_t len, struct mg_tun_frame *frame);
-
-void mg_tun_send_frame(struct mg_connection *ws, uint32_t stream_id,
-                       uint8_t type, uint8_t flags, struct mg_str msg);
-
-void mg_tun_destroy_client(struct mg_tun_client *client);
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-
-#endif /* MG_ENABLE_TUN */
-
-#endif /* CS_MONGOOSE_SRC_TUN_H_ */

test/Makefile

@@ -3,7 +3,7 @@
 PROG = unit_test
 REPO_ROOT ?= ../../
 SRC_DIR = ../src
-TEST_SOURCES = unit_test.c $(REPO_ROOT)/common/test_util.c $(REPO_ROOT)/tuna/dispatcher.c
+TEST_SOURCES = unit_test.c $(REPO_ROOT)/common/test_util.c
 AMALGAMATED_SOURCES = ../mongoose.c
 KRYPTON_PATH = $(REPO_ROOT)/krypton
 # or Krypton, or mbedTLS

test/unit_test.c

@@ -20,7 +20,6 @@
 #include "unit_test.h"
 #include "common/test_util.h"
 #include "common/cs_md5.h"
-#include "tuna/dispatcher.h"
 
 #if defined(_MSC_VER) && _MSC_VER >= 1900
 #include <crtdbg.h>
@@ -3816,44 +3815,6 @@ void tunnel_client_test_handler(struct mg_connection *nc, int ev,
   }
 }
 
-/*
- * NOTE(mkm): this test requires compiling the unit_test.c file with
- * //tuna/dispatcher.c .
- * Windows test runner doesn't use a makefile that's checked in
- * and I can't shave this yak now.
- * This doesn't mean the tunnel is not supposed to work on windows; there
- * is no fundamental reason it shouldn't, but obviously we should shave
- * the yak and make it testable there as well.
- */
-#ifndef _WIN32
-static const char *test_tunnel(void) {
-  struct mg_connection *client, *server;
-  struct mg_mgr mgr;
-  int sentinel = 0;
-  mg_mgr_init(&mgr, NULL);
-
-  mg_tund_bind(&mgr, "localhost:4321");
-
-  server = mg_bind(&mgr, "ws://localhost:4321", tunnel_server_test_handler);
-  mg_set_protocol_http_websocket(server);
-  /*
-   * Connection happens only at the next poll (because we need to give the app
-   * a chance to set MG_F_TUN_DO_NOT_RECONNECT), so let's poll once
-   */
-  mg_mgr_poll(&mgr, 1);
-  mg_mgr_poll(&mgr, 1);
-  client = mg_connect_http(&mgr, tunnel_client_test_handler,
-                           "http://localhost:4321/foo", NULL, NULL);
-  client->user_data = (void *) &sentinel;
-
-  poll_until(&mgr, 1, c_int_eq, &sentinel, (void *) 1);
-  ASSERT_EQ(sentinel, 1);
-
-  mg_mgr_free(&mgr);
-  return NULL;
-}
-#endif
-
 static const char *test_http_chunk(void) {
   struct mg_connection nc;
   init_test_connection(&nc);
@@ -5544,9 +5505,6 @@ static const char *run_tests(const char *filter, double *total_elapsed) {
   RUN_TEST(test_hexdump_file);
   RUN_TEST(test_basic_auth_helpers);
   RUN_TEST(test_http_auth);
-#ifndef _WIN32
-  RUN_TEST(test_tunnel);
-#endif
 #if MG_ENABLE_SSL
   RUN_TEST(test_ssl);
 #ifdef OPENSSL_VERSION_NUMBER