1 /*
2 * lws-minimal-raw-proxy
3 *
4 * Written in 2010-2019 by Andy Green <andy@warmcat.com>
5 *
6 * This file is made available under the Creative Commons CC0 1.0
7 * Universal Public Domain Dedication.
8 *
9 * This demonstrates a vhost that acts as a raw tcp proxy. Incoming connections
10 * cause an outgoing connection to be initiated, and if successfully established
11 * then traffic coming in one side is placed on a ringbuffer and sent out the
12 * opposite side as soon as possible.
13 */
14
15 #include <libwebsockets.h>
16 #include <string.h>
17 #include <signal.h>
18 #include <sys/types.h>
19
20 #define LWS_PLUGIN_STATIC
21 #include "../plugins/raw-proxy/protocol_lws_raw_proxy.c"
22
23 static struct lws_protocols protocols[] = {
24 LWS_PLUGIN_PROTOCOL_RAW_PROXY,
25 { NULL, NULL, 0, 0 } /* terminator */
26 };
27
28 static int interrupted;
29
sigint_handler(int sig)30 void sigint_handler(int sig)
31 {
32 interrupted = 1;
33 }
34
35 static struct lws_protocol_vhost_options pvo1 = {
36 NULL,
37 NULL,
38 "onward", /* pvo name */
39 "ipv4:127.0.0.1:22" /* pvo value */
40 };
41
42 static const struct lws_protocol_vhost_options pvo = {
43 NULL, /* "next" pvo linked-list */
44 &pvo1, /* "child" pvo linked-list */
45 "raw-proxy", /* protocol name we belong to on this vhost */
46 "" /* ignored */
47 };
48
49
main(int argc,const char ** argv)50 int main(int argc, const char **argv)
51 {
52 int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE;
53 struct lws_context_creation_info info;
54 struct lws_context *context;
55 char outward[256];
56 const char *p;
57
58 signal(SIGINT, sigint_handler);
59
60 if ((p = lws_cmdline_option(argc, argv, "-d")))
61 logs = atoi(p);
62
63 lws_set_log_level(logs, NULL);
64 lwsl_user("LWS minimal raw proxy\n");
65
66 if ((p = lws_cmdline_option(argc, argv, "-r"))) {
67 lws_strncpy(outward, p, sizeof(outward));
68 pvo1.value = outward;
69 }
70
71 memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
72 info.port = 7681;
73 info.protocols = protocols;
74 info.pvo = &pvo;
75 info.options = LWS_SERVER_OPTION_ADOPT_APPLY_LISTEN_ACCEPT_CONFIG;
76 info.listen_accept_role = "raw-proxy";
77 info.listen_accept_protocol = "raw-proxy";
78
79 context = lws_create_context(&info);
80 if (!context) {
81 lwsl_err("lws init failed\n");
82 return 1;
83 }
84
85 while (n >= 0 && !interrupted)
86 n = lws_service(context, 0);
87
88 lws_context_destroy(context);
89
90 return 0;
91 }
92