1/*
2 * lws-minimal-ws-client-pmd-bulk
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 ws client that sends bulk data in multiple
10 * ws fragments, in a way compatible with per-message deflate.
11 *
12 * It shows how to send huge messages without needing a lot of memory.
13 *
14 * Build and start the minimal-examples/ws-server/minmal-ws-server-pmd-bulk
15 * example first.  Running this sends a large message to the server and
16 * exits.
17 *
18 * If you give both sides the -n commandline option, it disables permessage-
19 * deflate compression extension.
20 */
21
22#include <libwebsockets.h>
23#include <string.h>
24#include <signal.h>
25
26#define LWS_PLUGIN_STATIC
27#include "protocol_lws_minimal_pmd_bulk.c"
28
29static struct lws_protocols protocols[] = {
30	{ "http", lws_callback_http_dummy, 0, 0, 0, NULL, 0 },
31	LWS_PLUGIN_PROTOCOL_MINIMAL_PMD_BULK,
32	LWS_PROTOCOL_LIST_TERM
33};
34
35static int interrupted, options;
36
37/* pass pointers to shared vars to the protocol */
38
39static const struct lws_protocol_vhost_options pvo_options = {
40	NULL,
41	NULL,
42	"options",		/* pvo name */
43	(void *)&options	/* pvo value */
44};
45
46static const struct lws_protocol_vhost_options pvo_interrupted = {
47	&pvo_options,
48	NULL,
49	"interrupted",		/* pvo name */
50	(void *)&interrupted	/* pvo value */
51};
52
53static const struct lws_protocol_vhost_options pvo = {
54	NULL,		/* "next" pvo linked-list */
55	&pvo_interrupted,	/* "child" pvo linked-list */
56	"lws-minimal-pmd-bulk",	/* protocol name we belong to on this vhost */
57	""		/* ignored */
58};
59static const struct lws_extension extensions[] = {
60	{
61		"permessage-deflate",
62		lws_extension_callback_pm_deflate,
63		"permessage-deflate"
64		 "; client_no_context_takeover"
65		 "; client_max_window_bits"
66	},
67	{ NULL, NULL, NULL /* terminator */ }
68};
69
70void sigint_handler(int sig)
71{
72	interrupted = 1;
73}
74
75int main(int argc, const char **argv)
76{
77	struct lws_context_creation_info info;
78	struct lws_context *context;
79	const char *p;
80	int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
81			/* for LLL_ verbosity above NOTICE to be built into lws,
82			 * lws must have been configured and built with
83			 * -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
84			/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
85			/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
86			/* | LLL_DEBUG */;
87
88	signal(SIGINT, sigint_handler);
89
90	if ((p = lws_cmdline_option(argc, argv, "-d")))
91		logs = atoi(p);
92
93	lws_set_log_level(logs, NULL);
94	lwsl_user("LWS minimal ws client + permessage-deflate + multifragment bulk message\n");
95	lwsl_user("   needs minimal-ws-server-pmd-bulk running to communicate with\n");
96	lwsl_user("   %s [-n (no exts)] [-c (compressible)]\n", argv[0]);
97
98	memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
99	info.port = CONTEXT_PORT_NO_LISTEN;
100	info.protocols = protocols;
101	info.pvo = &pvo;
102	if (!lws_cmdline_option(argc, argv, "-n"))
103		info.extensions = extensions;
104	info.pt_serv_buf_size = 32 * 1024;
105
106	if (lws_cmdline_option(argc, argv, "-c"))
107		options |= 1;
108
109	/*
110	 * since we know this lws context is only ever going to be used with
111	 * one client wsis / fds / sockets at a time, let lws know it doesn't
112	 * have to use the default allocations for fd tables up to ulimit -n.
113	 * It will just allocate for 1 internal and 1 (+ 1 http2 nwsi) that we
114	 * will use.
115	 */
116	info.fd_limit_per_thread = 1 + 1 + 1;
117
118	context = lws_create_context(&info);
119	if (!context) {
120		lwsl_err("lws init failed\n");
121		return 1;
122	}
123
124	while (n >= 0 && !interrupted)
125		n = lws_service(context, 0);
126
127	lws_context_destroy(context);
128
129	lwsl_user("Completed %s\n", interrupted == 2 ? "OK" : "failed");
130
131	return interrupted != 2;
132}
133