slave.c 6.91 KB
Newer Older
1
/* -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- */
2
3
4
5
6
7
8
/* slave.c
 * by Ciaran Anscomb <ciaran.anscomb@6809.org.uk>
 *
 * Periodically requests a list of streams from a master server
 * and creates source threads for any it doesn't already have.
 * */

9
10
11
12
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>

#ifndef _WIN32
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#else
#include <winsock2.h>
#define snprintf _snprintf
#define strcasecmp stricmp
#define strncasecmp strnicmp
#endif

#include "os.h"

Karl Heyes's avatar
Karl Heyes committed
32
33
34
35
#include "thread/thread.h"
#include "avl/avl.h"
#include "net/sock.h"
#include "httpp/httpp.h"
36

37
#include "cfgfile.h"
38
39
40
41
42
43
44
45
#include "global.h"
#include "util.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
#include "logging.h"
#include "source.h"
Michael Smith's avatar
Michael Smith committed
46
#include "format.h"
47
48
49
50

#define CATMODULE "slave"

static void *_slave_thread(void *arg);
51
thread_type *_slave_thread_id;
52
53
54
static int _initialized = 0;

void slave_initialize(void) {
Michael Smith's avatar
Michael Smith committed
55
    ice_config_t *config;
56
    if (_initialized) return;
Michael Smith's avatar
Michael Smith committed
57
58

    config = config_get_config();
59
    /* Don't create a slave thread if it isn't configured */
Michael Smith's avatar
Michael Smith committed
60
61
62
63
    if (config->master_server == NULL && 
            config->relay == NULL)
    {
        config_release_config();
64
        return;
Michael Smith's avatar
Michael Smith committed
65
66
    }
    config_release_config();
67

68
69
    _initialized = 1;
    _slave_thread_id = thread_create("Slave Thread", _slave_thread, NULL, THREAD_ATTACHED);
70
71
72
}

void slave_shutdown(void) {
73
74
75
    if (!_initialized) return;
    _initialized = 0;
    thread_join(_slave_thread_id);
76
77
}

78
static void create_relay_stream(char *server, int port, 
79
        char *remotemount, char *localmount, int mp3)
Michael Smith's avatar
Michael Smith committed
80
81
{
    sock_t streamsock;
82
83
84
    char header[4096];
    connection_t *con;
    http_parser_t *parser;
85
    client_t *client;
Michael Smith's avatar
Michael Smith committed
86

87
88
89
90
    if(!localmount)
        localmount = remotemount;

    DEBUG1("Adding source at mountpoint \"%s\"", localmount);
Michael Smith's avatar
Michael Smith committed
91

92
93
    streamsock = sock_connect_wto(server, port, 0);
    if (streamsock == SOCK_ERROR) {
94
        WARN2("Failed to relay stream from master server, couldn't connect to http://%s:%d", server, port);
Michael Smith's avatar
Michael Smith committed
95
        return;
96
    }
97
    con = create_connection(streamsock, -1, NULL);
98
    if(mp3) {
99
100
101
        /* Some mp3 servers are bitchy, send a user-agent string to make them
         * send the right response.
         */
102
        sock_write(streamsock, "GET %s HTTP/1.0\r\n"
103
104
105
                               "User-Agent: " ICECAST_VERSION_STRING "\r\n"
                               "Icy-MetaData: 1\r\n"
                               "\r\n", 
106
107
108
                remotemount);
    }
    else {
109
        sock_write(streamsock, "GET %s HTTP/1.0\r\n"
110
111
112
                               "User-Agent: " ICECAST_VERSION_STRING "\r\n"
                               "\r\n",
                remotemount);
113
    }
114
115
    memset(header, 0, sizeof(header));
    if (util_read_header(con->sock, header, 4096) == 0) {
116
        WARN0("Header read failed");
117
118
119
120
121
122
        connection_close(con);
        return;
    }
    parser = httpp_create_parser();
    httpp_initialize(parser, NULL);
    if(!httpp_parse_response(parser, header, strlen(header), localmount)) {
Michael Smith's avatar
Michael Smith committed
123
124
125
126
127
128
        if(httpp_getvar(parser, HTTPP_VAR_ERROR_MESSAGE)) {
            ERROR1("Error parsing relay request: %s", 
                    httpp_getvar(parser, HTTPP_VAR_ERROR_MESSAGE));
        }
        else
            ERROR0("Error parsing relay request");
129
        connection_close(con);
Michael Smith's avatar
Michael Smith committed
130
131
132
133
134
        httpp_destroy(parser);
        return;
    }

    client = client_create(con, parser);
135
    if (!connection_create_source(client, con, parser, 
Michael Smith's avatar
Michael Smith committed
136
                httpp_getvar(parser, HTTPP_VAR_URI))) {
137
        DEBUG0("Failed to create source");
Michael Smith's avatar
Michael Smith committed
138
        client_destroy(client);
139
    }
140

Michael Smith's avatar
Michael Smith committed
141
142
143
144
    return;
}

static void *_slave_thread(void *arg) {
145
146
    sock_t mastersock;
    char buf[256];
Michael Smith's avatar
Michael Smith committed
147
    int interval;
148
149
150
    char *authheader, *data;
    int len;
    char *username = "relay";
Michael Smith's avatar
Michael Smith committed
151
152
    char *password;
    int max_interval;
Michael Smith's avatar
Michael Smith committed
153
    relay_server *relay;
Michael Smith's avatar
Michael Smith committed
154
155
156
157
158
159
    ice_config_t *config;
    
    config = config_get_config();

    password = config->master_password;
    interval = max_interval = config->master_update_interval;
160
161

    if(password == NULL)
Michael Smith's avatar
Michael Smith committed
162
163
164
        password = config->source_password;

    config_release_config();
165

166

167
    while (_initialized) {
Michael Smith's avatar
Michael Smith committed
168
        if (max_interval > ++interval) {
169
            thread_sleep(1000000);
170
171
            continue;
        }
Michael Smith's avatar
Michael Smith committed
172
173
174
175
176
177
        else {
            /* In case it's been reconfigured */
            config = config_get_config();
            max_interval = config->master_update_interval;
            config_release_config();

178
            interval = 0;
Michael Smith's avatar
Michael Smith committed
179
180
181
182
183
184
185
186
        }

        config = config_get_config();
        if(config->master_server != NULL) {
            char *server = config->master_server;
            int port = config->master_server_port;
            config_release_config();

187
            mastersock = sock_connect_wto(server, port, 0);
188

189
            if (mastersock == SOCK_ERROR) {
Michael Smith's avatar
Michael Smith committed
190
                WARN0("Relay slave failed to contact master server to fetch stream list");
191
192
                continue;
            }
Michael Smith's avatar
Michael Smith committed
193
194
195
196
197
198
199

            len = strlen(username) + strlen(password) + 1;
            authheader = malloc(len+1);
            strcpy(authheader, username);
            strcat(authheader, ":");
            strcat(authheader, password);
            data = util_base64_encode(authheader);
200
            sock_write(mastersock, 
Michael Smith's avatar
Michael Smith committed
201
202
203
204
205
                    "GET /admin/streamlist HTTP/1.0\r\n"
                    "Authorization: Basic %s\r\n"
                    "\r\n", data);
            free(authheader);
            free(data);
206
            while (sock_read_line(mastersock, buf, sizeof(buf))) {
Michael Smith's avatar
Michael Smith committed
207
208
209
                if(!strlen(buf))
                    break;
            }
210

211
212
213
214
            while (sock_read_line(mastersock, buf, sizeof(buf))) {
                avl_tree_rlock(global.source_tree);
                if (!source_find_mount(buf)) {
                    avl_tree_unlock(global.source_tree);
Michael Smith's avatar
Michael Smith committed
215

Michael Smith's avatar
Michael Smith committed
216
                    create_relay_stream(server, port, buf, NULL, 0);
217
                } 
Michael Smith's avatar
Michael Smith committed
218
                else
219
220
221
                    avl_tree_unlock(global.source_tree);
            }
            sock_close(mastersock);
Michael Smith's avatar
Michael Smith committed
222
        }
Michael Smith's avatar
Michael Smith committed
223
224
225
        else {
            config_release_config();
        }
Michael Smith's avatar
Michael Smith committed
226
227

        /* And now, we process the individual mounts... */
Michael Smith's avatar
Michael Smith committed
228
229
230
231
232
        config = config_get_config();
        relay = config->relay;
        thread_mutex_lock(&(config_locks()->relay_lock));
        config_release_config();

Michael Smith's avatar
Michael Smith committed
233
234
        while(relay) {
            avl_tree_rlock(global.source_tree);
235
            if(!source_find_mount(relay->localmount)) {
Michael Smith's avatar
Michael Smith committed
236
237
                avl_tree_unlock(global.source_tree);

238
                create_relay_stream(relay->server, relay->port, relay->mount,
239
                        relay->localmount, relay->mp3metadata);
Michael Smith's avatar
Michael Smith committed
240
241
242
            }
            else
                avl_tree_unlock(global.source_tree);
Michael Smith's avatar
Michael Smith committed
243
            relay = relay->next;
Michael Smith's avatar
Michael Smith committed
244
        }
Michael Smith's avatar
Michael Smith committed
245
246

        thread_mutex_unlock(&(config_locks()->relay_lock));
247
248
249
    }
    thread_exit(0);
    return NULL;
250
}
Michael Smith's avatar
Michael Smith committed
251