ustream-example.c

   1 /*
   2  * ustream-ssl - library for SSL over ustream
   3  *
   4  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/socket.h>
  20 #include <netinet/in.h>
  21
  22 #include <stdio.h>
  23 #include <getopt.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <signal.h>
  28
  29 #include <libubox/ustream.h>
  30 #include <libubox/uloop.h>
  31 #include <libubox/usock.h>
  32 #include "ustream-ssl.h"
  33
  34 static void *ctx;
  35
  36 static struct uloop_fd server;
  37 static const char *port = "10000";
  38 static struct client *next_client = NULL;
  39
  40 struct client {
  41         struct sockaddr_in sin;
  42
  43         struct ustream_fd s;
  44         struct ustream_ssl ssl;
  45         int ctr;
  46
  47         int state;
  48 };
  49
  50 enum {
  51         STATE_INITIAL,
  52         STATE_HEADERS,
  53         STATE_DONE,
  54 };
  55
  56 static void client_read_cb(struct ustream *s, int bytes)
  57 {
  58         struct client *cl = container_of(s, struct client, ssl.stream);
  59         struct ustream_buf *buf = s->r.head;
  60         char *newline, *str;
  61
  62         do {
  63                 str = ustream_get_read_buf(s, NULL);
  64                 if (!str)
  65                         break;
  66
  67                 newline = strchr(buf->data, '\n');
  68                 if (!newline)
  69                         break;
  70
  71                 *newline = 0;
  72                 switch (cl->state) {
  73                 case STATE_INITIAL:
  74                         ustream_printf(s, "HTTP/1.1 200 OK\nContent-Type:text/plain\n\n");
  75                         ustream_printf(s, "Got request header: %s\n", str);
  76                         cl->state++;
  77                         break;
  78                 case STATE_HEADERS:
  79                         switch(str[0]) {
  80                         case '\r':
  81                         case '\n':
  82                                 s->eof = true;
  83                                 ustream_state_change(s);
  84                                 cl->state++;
  85                                 break;
  86                         default:
  87                                 ustream_printf(s, "%s\n", str);
  88                                 break;
  89                         }
  90                         break;
  91                 default:
  92                         break;
  93                 }
  94                 ustream_consume(s, newline + 1 - str);
  95                 cl->ctr += newline + 1 - str;
  96         } while(1);
  97
  98         if (s->w.data_bytes > 256 && !ustream_read_blocked(s)) {
  99                 fprintf(stderr, "Block read, bytes: %d\n", s->w.data_bytes);
 100                 ustream_set_read_blocked(s, true);
 101         }
 102 }
 103
 104 static void client_close(struct ustream *s)
 105 {
 106         struct client *cl = container_of(s, struct client, ssl.stream);
 107
 108         fprintf(stderr, "Connection closed\n");
 109         ustream_free(s);
 110         ustream_free(&cl->s.stream);
 111         close(cl->s.fd.fd);
 112         free(cl);
 113 }
 114
 115 static void client_notify_write(struct ustream *s, int bytes)
 116 {
 117         fprintf(stderr, "Wrote %d bytes, pending: %d\n", bytes, s->w.data_bytes);
 118
 119         if (s->w.data_bytes < 128 && ustream_read_blocked(s)) {
 120                 fprintf(stderr, "Unblock read\n");
 121                 ustream_set_read_blocked(s, false);
 122         }
 123 }
 124
 125 static void client_notify_state(struct ustream *s)
 126 {
 127         struct client *cl = container_of(s, struct client, ssl.stream);
 128
 129         if (!s->eof)
 130                 return;
 131
 132         fprintf(stderr, "eof!, pending: %d, total: %d\n", s->w.data_bytes, cl->ctr);
 133         if (!s->w.data_bytes)
 134                 return client_close(s);
 135 }
 136
 137 static void client_notify_connected(struct ustream_ssl *ssl)
 138 {
 139         fprintf(stderr, "SSL connection established\n");
 140 }
 141
 142 static void client_notify_error(struct ustream_ssl *ssl, int error, const char *str)
 143 {
 144         fprintf(stderr, "SSL connection error(%d): %s\n", error, str);
 145 }
 146
 147 static void server_cb(struct uloop_fd *fd, unsigned int events)
 148 {
 149         struct client *cl;
 150         unsigned int sl = sizeof(struct sockaddr_in);
 151         int sfd;
 152
 153         if (!next_client)
 154                 next_client = calloc(1, sizeof(*next_client));
 155
 156         cl = next_client;
 157         sfd = accept(server.fd, (struct sockaddr *) &cl->sin, &sl);
 158         if (sfd < 0) {
 159                 fprintf(stderr, "Accept failed\n");
 160                 return;
 161         }
 162
 163         cl->ssl.stream.string_data = true;
 164         cl->ssl.stream.notify_read = client_read_cb;
 165         cl->ssl.stream.notify_state = client_notify_state;
 166         cl->ssl.stream.notify_write = client_notify_write;
 167         cl->ssl.notify_connected = client_notify_connected;
 168         cl->ssl.notify_error = client_notify_error;
 169
 170         ustream_fd_init(&cl->s, sfd);
 171         ustream_ssl_init(&cl->ssl, &cl->s.stream, ctx, true);
 172         next_client = NULL;
 173         fprintf(stderr, "New connection\n");
 174 }
 175
 176 static int run_server(void)
 177 {
 178
 179         server.cb = server_cb;
 180         server.fd = usock(USOCK_TCP | USOCK_SERVER | USOCK_IPV4ONLY | USOCK_NUMERIC, "127.0.0.1", port);
 181         if (server.fd < 0) {
 182                 perror("usock");
 183                 return 1;
 184         }
 185
 186         uloop_init();
 187         uloop_fd_add(&server, ULOOP_READ);
 188         uloop_run();
 189
 190         return 0;
 191 }
 192
 193 static int usage(const char *name)
 194 {
 195         fprintf(stderr, "Usage: %s -p <port>\n", name);
 196         return 1;
 197 }
 198
 199 int main(int argc, char **argv)
 200 {
 201         int ch;
 202
 203         signal(SIGPIPE, SIG_IGN);
 204         ctx = ustream_ssl_context_new(true);
 205         ustream_ssl_context_set_crt_file(ctx, "example.crt");
 206         ustream_ssl_context_set_key_file(ctx, "example.key");
 207
 208         while ((ch = getopt(argc, argv, "p:")) != -1) {
 209                 switch(ch) {
 210                 case 'p':
 211                         port = optarg;
 212                         break;
 213                 default:
 214                         return usage(argv[0]);
 215                 }
 216         }
 217
 218         return run_server();
 219 }