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
  28 #include <libubox/ustream.h>
  29 #include <libubox/uloop.h>
  30 #include <libubox/usock.h>
  31 #include "ustream-ssl.h"
  32
  33 static void *ctx;
  34
  35 static struct uloop_fd server;
  36 static const char *port = "10000";
  37 static struct client *next_client = NULL;
  38
  39 struct client {
  40         struct sockaddr_in sin;
  41
  42         struct ustream_fd s;
  43         struct ustream_ssl ssl;
  44         int ctr;
  45
  46         int state;
  47 };
  48
  49 enum {
  50         STATE_INITIAL,
  51         STATE_HEADERS,
  52         STATE_DONE,
  53 };
  54
  55 static void client_read_cb(struct ustream *s, int bytes)
  56 {
  57         struct client *cl = container_of(s, struct client, ssl.stream);
  58         struct ustream_buf *buf = s->r.head;
  59         char *newline, *str;
  60
  61         do {
  62                 str = ustream_get_read_buf(s, NULL);
  63                 if (!str)
  64                         break;
  65
  66                 newline = strchr(buf->data, '\n');
  67                 if (!newline)
  68                         break;
  69
  70                 *newline = 0;
  71                 switch (cl->state) {
  72                 case STATE_INITIAL:
  73                         ustream_printf(s, "HTTP/1.1 200 OK\nContent-Type:text/plain\n\n");
  74                         ustream_printf(s, "Got request header: %s\n", str);
  75                         cl->state++;
  76                         break;
  77                 case STATE_HEADERS:
  78                         switch(str[0]) {
  79                         case '\r':
  80                         case '\n':
  81                                 s->eof = true;
  82                                 ustream_state_change(s);
  83                                 cl->state++;
  84                                 break;
  85                         default:
  86                                 ustream_printf(s, "%s\n", str);
  87                                 break;
  88                         }
  89                         break;
  90                 default:
  91                         break;
  92                 }
  93                 ustream_consume(s, newline + 1 - str);
  94                 cl->ctr += newline + 1 - str;
  95         } while(1);
  96
  97         if (s->w.data_bytes > 256 && !ustream_read_blocked(s)) {
  98                 fprintf(stderr, "Block read, bytes: %d\n", s->w.data_bytes);
  99                 ustream_set_read_blocked(s, true);
 100         }
 101 }
 102
 103 static void client_close(struct ustream *s)
 104 {
 105         struct client *cl = container_of(s, struct client, ssl.stream);
 106
 107         fprintf(stderr, "Connection closed\n");
 108         ustream_free(s);
 109         ustream_free(&cl->s.stream);
 110         close(cl->s.fd.fd);
 111         free(cl);
 112 }
 113
 114 static void client_notify_write(struct ustream *s, int bytes)
 115 {
 116         fprintf(stderr, "Wrote %d bytes, pending: %d\n", bytes, s->w.data_bytes);
 117
 118         if (s->w.data_bytes < 128 && ustream_read_blocked(s)) {
 119                 fprintf(stderr, "Unblock read\n");
 120                 ustream_set_read_blocked(s, false);
 121         }
 122 }
 123
 124 static void client_notify_state(struct ustream *s)
 125 {
 126         struct client *cl = container_of(s, struct client, ssl.stream);
 127
 128         if (!s->eof)
 129                 return;
 130
 131         fprintf(stderr, "eof!, pending: %d, total: %d\n", s->w.data_bytes, cl->ctr);
 132         if (!s->w.data_bytes)
 133                 return client_close(s);
 134 }
 135
 136 static void client_notify_connected(struct ustream_ssl *ssl)
 137 {
 138         fprintf(stderr, "SSL connection established\n");
 139 }
 140
 141 static void client_notify_error(struct ustream_ssl *ssl, int error, const char *str)
 142 {
 143         fprintf(stderr, "SSL connection error(%d): %s\n", error, str);
 144 }
 145
 146 static void server_cb(struct uloop_fd *fd, unsigned int events)
 147 {
 148         struct client *cl;
 149         unsigned int sl = sizeof(struct sockaddr_in);
 150         int sfd;
 151
 152         if (!next_client)
 153                 next_client = calloc(1, sizeof(*next_client));
 154
 155         cl = next_client;
 156         sfd = accept(server.fd, (struct sockaddr *) &cl->sin, &sl);
 157         if (sfd < 0) {
 158                 fprintf(stderr, "Accept failed\n");
 159                 return;
 160         }
 161
 162         cl->ssl.stream.string_data = true;
 163         cl->ssl.stream.notify_read = client_read_cb;
 164         cl->ssl.stream.notify_state = client_notify_state;
 165         cl->ssl.stream.notify_write = client_notify_write;
 166         cl->ssl.notify_connected = client_notify_connected;
 167         cl->ssl.notify_error = client_notify_error;
 168
 169         ustream_fd_init(&cl->s, sfd);
 170         ustream_ssl_init(&cl->ssl, &cl->s.stream, ctx, true);
 171         next_client = NULL;
 172         fprintf(stderr, "New connection\n");
 173 }
 174
 175 static int run_server(void)
 176 {
 177
 178         server.cb = server_cb;
 179         server.fd = usock(USOCK_TCP | USOCK_SERVER | USOCK_IPV4ONLY | USOCK_NUMERIC, "127.0.0.1", port);
 180         if (server.fd < 0) {
 181                 perror("usock");
 182                 return 1;
 183         }
 184
 185         uloop_init();
 186         uloop_fd_add(&server, ULOOP_READ);
 187         uloop_run();
 188
 189         return 0;
 190 }
 191
 192 static int usage(const char *name)
 193 {
 194         fprintf(stderr, "Usage: %s -p <port>\n", name);
 195         return 1;
 196 }
 197
 198 int main(int argc, char **argv)
 199 {
 200         int ch;
 201
 202         ctx = ustream_ssl_context_new(true);
 203         ustream_ssl_context_set_crt_file(ctx, "example.crt");
 204         ustream_ssl_context_set_key_file(ctx, "example.key");
 205
 206         while ((ch = getopt(argc, argv, "p:")) != -1) {
 207                 switch(ch) {
 208                 case 'p':
 209                         port = optarg;
 210                         break;
 211                 default:
 212                         return usage(argv[0]);
 213                 }
 214         }
 215
 216         return run_server();
 217 }