ustream-example.c

   1 #include <sys/socket.h>
   2 #include <netinet/in.h>
   3
   4 #include <stdio.h>
   5 #include <getopt.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9
  10 #include <libubox/ustream.h>
  11 #include <libubox/uloop.h>
  12 #include <libubox/usock.h>
  13 #include "ustream-ssl.h"
  14
  15 static void *ctx;
  16
  17 static struct uloop_fd server;
  18 static const char *port = "10000";
  19 static struct client *next_client = NULL;
  20
  21 struct client {
  22         struct sockaddr_in sin;
  23
  24         struct ustream_fd s;
  25         struct ustream_ssl ssl;
  26         int ctr;
  27
  28         int state;
  29 };
  30
  31 enum {
  32         STATE_INITIAL,
  33         STATE_HEADERS,
  34         STATE_DONE,
  35 };
  36
  37 static void client_read_cb(struct ustream *s, int bytes)
  38 {
  39         struct client *cl = container_of(s, struct client, ssl.stream);
  40         struct ustream_buf *buf = s->r.head;
  41         char *newline, *str;
  42
  43         do {
  44                 str = ustream_get_read_buf(s, NULL);
  45                 if (!str)
  46                         break;
  47
  48                 newline = strchr(buf->data, '\n');
  49                 if (!newline)
  50                         break;
  51
  52                 *newline = 0;
  53                 switch (cl->state) {
  54                 case STATE_INITIAL:
  55                         ustream_printf(s, "HTTP/1.1 200 OK\nContent-Type:text/plain\n\n");
  56                         ustream_printf(s, "Got request header: %s\n", str);
  57                         cl->state++;
  58                         break;
  59                 case STATE_HEADERS:
  60                         switch(str[0]) {
  61                         case '\r':
  62                         case '\n':
  63                                 s->eof = true;
  64                                 ustream_state_change(s);
  65                                 cl->state++;
  66                                 break;
  67                         default:
  68                                 ustream_printf(s, "%s\n", str);
  69                                 break;
  70                         }
  71                         break;
  72                 default:
  73                         break;
  74                 }
  75                 ustream_consume(s, newline + 1 - str);
  76                 cl->ctr += newline + 1 - str;
  77         } while(1);
  78
  79         if (s->w.data_bytes > 256 && !ustream_read_blocked(s)) {
  80                 fprintf(stderr, "Block read, bytes: %d\n", s->w.data_bytes);
  81                 ustream_set_read_blocked(s, true);
  82         }
  83 }
  84
  85 static void client_close(struct ustream *s)
  86 {
  87         struct client *cl = container_of(s, struct client, ssl.stream);
  88
  89         fprintf(stderr, "Connection closed\n");
  90         ustream_free(s);
  91         ustream_free(&cl->s.stream);
  92         close(cl->s.fd.fd);
  93         free(cl);
  94 }
  95
  96 static void client_notify_write(struct ustream *s, int bytes)
  97 {
  98         fprintf(stderr, "Wrote %d bytes, pending: %d\n", bytes, s->w.data_bytes);
  99
 100         if (s->w.data_bytes < 128 && ustream_read_blocked(s)) {
 101                 fprintf(stderr, "Unblock read\n");
 102                 ustream_set_read_blocked(s, false);
 103         }
 104 }
 105
 106 static void client_notify_state(struct ustream *s)
 107 {
 108         struct client *cl = container_of(s, struct client, ssl.stream);
 109
 110         if (!s->eof)
 111                 return;
 112
 113         fprintf(stderr, "eof!, pending: %d, total: %d\n", s->w.data_bytes, cl->ctr);
 114         if (!s->w.data_bytes)
 115                 return client_close(s);
 116 }
 117
 118 static void client_notify_connected(struct ustream_ssl *ssl)
 119 {
 120         fprintf(stderr, "SSL connection established\n");
 121 }
 122
 123 static void client_notify_error(struct ustream_ssl *ssl, int error, const char *str)
 124 {
 125         fprintf(stderr, "SSL connection error(%d): %s\n", error, str);
 126 }
 127
 128 static void server_cb(struct uloop_fd *fd, unsigned int events)
 129 {
 130         struct client *cl;
 131         unsigned int sl = sizeof(struct sockaddr_in);
 132         int sfd;
 133
 134         if (!next_client)
 135                 next_client = calloc(1, sizeof(*next_client));
 136
 137         cl = next_client;
 138         sfd = accept(server.fd, (struct sockaddr *) &cl->sin, &sl);
 139         if (sfd < 0) {
 140                 fprintf(stderr, "Accept failed\n");
 141                 return;
 142         }
 143
 144         cl->ssl.stream.string_data = true;
 145         cl->ssl.stream.notify_read = client_read_cb;
 146         cl->ssl.stream.notify_state = client_notify_state;
 147         cl->ssl.stream.notify_write = client_notify_write;
 148         cl->ssl.notify_connected = client_notify_connected;
 149         cl->ssl.notify_error = client_notify_error;
 150
 151         ustream_fd_init(&cl->s, sfd);
 152         ustream_ssl_init(&cl->ssl, &cl->s.stream, ctx, true);
 153         next_client = NULL;
 154         fprintf(stderr, "New connection\n");
 155 }
 156
 157 static int run_server(void)
 158 {
 159
 160         server.cb = server_cb;
 161         server.fd = usock(USOCK_TCP | USOCK_SERVER | USOCK_IPV4ONLY | USOCK_NUMERIC, "127.0.0.1", port);
 162         if (server.fd < 0) {
 163                 perror("usock");
 164                 return 1;
 165         }
 166
 167         uloop_init();
 168         uloop_fd_add(&server, ULOOP_READ);
 169         uloop_run();
 170
 171         return 0;
 172 }
 173
 174 static int usage(const char *name)
 175 {
 176         fprintf(stderr, "Usage: %s -p <port>\n", name);
 177         return 1;
 178 }
 179
 180 int main(int argc, char **argv)
 181 {
 182         int ch;
 183
 184         ctx = ustream_ssl_context_new(true);
 185         ustream_ssl_context_set_crt_file(ctx, "example.crt");
 186         ustream_ssl_context_set_key_file(ctx, "example.key");
 187
 188         while ((ch = getopt(argc, argv, "p:")) != -1) {
 189                 switch(ch) {
 190                 case 'p':
 191                         port = optarg;
 192                         break;
 193                 default:
 194                         return usage(argv[0]);
 195                 }
 196         }
 197
 198         return run_server();
 199 }