Skip to main content
aboutsummaryrefslogtreecommitdiffstats
blob: eb7a7d8c72b7f102156ff48e58090a982f40e18d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
/*******************************************************************************
 * Copyright (c) 2007, 2009 Wind River Systems, Inc. and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution.
 * The Eclipse Public License is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Wind River Systems - initial API and implementation
 *******************************************************************************/

/*
 * TCF Logger main module.
 *
 * TCF Logger is a simple TCF agent that des not provide any services itself,
 * instead it forward all TCF traffic to another agent.
 * Logger prints all messages it forwards.
 * It can be used as diagnostic and debugging tool.
 */

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <assert.h>
#include <framework/asyncreq.h>
#include <framework/events.h>
#include <framework/trace.h>
#include <framework/myalloc.h>
#include <framework/channel.h>
#include <framework/protocol.h>
#include <framework/proxy.h>
#include <framework/errors.h>
#include <services/discovery.h>

static const char * progname;
static const char * dest_url = "TCP::1534";

typedef struct ConnectInfo {
    PeerServer * ps;
    Channel * c1;
} ConnectInfo;

static void connect_done(void * args, int error, Channel * c2) {
    ConnectInfo * info = (ConnectInfo *)args;
    Channel * c1 = info->c1;

    if (!is_channel_closed(c1)) {
        assert(c1->state == ChannelStateRedirectReceived);
        if (error) {
            fprintf(stderr, "cannot connect to peer: %s\n", dest_url);
            channel_close(c1);
        }
        else {
            proxy_create(c1, c2);
        }
    }
    else if (!error) {
        channel_close(c2);
    }
    channel_unlock(c1);
    peer_server_free(info->ps);
    loc_free(info);
}

static void connect_dest(void * x) {
    Channel * c1 = (Channel *)x;
    PeerServer * ps = NULL;
    ConnectInfo * info = NULL;

    ps = channel_peer_from_url(dest_url);
    if (ps == NULL) {
        trace(LOG_ALWAYS, "cannot parse peer url: %s", dest_url);
        channel_close(c1);
        return;
    }
    channel_lock(c1);
    c1->state = ChannelStateRedirectReceived;
    info = (ConnectInfo *)loc_alloc_zero(sizeof(ConnectInfo));
    info->ps = ps;
    info->c1 = c1;
    channel_connect(ps, connect_done, info);
}

static void channel_server_connecting(Channel * c1) {
    trace(LOG_ALWAYS, "channel server connecting");

    assert(c1->state == ChannelStateStarted);
    c1->state = ChannelStateHelloSent;  /* Fake that we sent hello message. */
}

static void channel_server_connected(Channel * c1) {
    trace(LOG_ALWAYS, "channel server connected");

    assert(c1->state == ChannelStateConnected);

    /* Connect to destination on next dispatch since we are limited in
     * what we can do in a callback, e.g. cannot close channel. */
    post_event(connect_dest, c1);
}

static void channel_server_disconnected(Channel * c1) {
    trace(LOG_ALWAYS, "channel server disconnected");
    protocol_release(c1->protocol);
}

static void channel_new_connection(ChannelServer * serv, Channel * c) {
    c->protocol = protocol_alloc();
    c->connecting = channel_server_connecting;
    c->connected = channel_server_connected;
    c->disconnected = channel_server_disconnected;
    channel_start(c);
}

#if defined(_WRS_KERNEL)
int tcf_log(void) {
#else
int main(int argc, char ** argv) {
#endif
    int c;
    int ind;
    const char * log_name = "-";
    const char * url = "TCP:";
    PeerServer * ps;
    ChannelServer * serv;

    ini_mdep();
    ini_trace();
    ini_events_queue();
    ini_asyncreq();

    log_mode = LOG_TCFLOG;

#if defined(_WRS_KERNEL)

    progname = "tcf";
    open_log_file("-");

#else

    progname = argv[0];

    /* Parse arguments */
    for (ind = 1; ind < argc; ind++) {
        const char * s = argv[ind];
        if (*s != '-') {
            break;
        }
        s++;
        while ((c = *s++) != '\0') {
            switch (c) {
            case 'l':
            case 'L':
            case 's':
                if (*s == '\0') {
                    if (++ind >= argc) {
                        fprintf(stderr, "%s: error: no argument given to option '%c'\n", progname, c);
                        exit(1);
                    }
                    s = argv[ind];
                }
                switch (c) {
                case 'l':
                    log_mode = strtol(s, 0, 0);
                    break;

                case 'L':
                    log_name = s;
                    break;

                case 's':
                    url = s;
                    break;

                default:
                    fprintf(stderr, "%s: error: illegal option '%c'\n", progname, c);
                    exit(1);
                }
                s = "";
                break;

            default:
                fprintf(stderr, "%s: error: illegal option '%c'\n", progname, c);
                exit(1);
            }
        }
    }
    open_log_file(log_name);
    if (ind < argc) {
        dest_url = argv[ind++];
    }

#endif

    ps = channel_peer_from_url(url);
    if (ps == NULL) {
        fprintf(stderr, "%s: invalid server URL (-s option value): %s\n", progname, url);
        exit(1);
    }
    peer_server_addprop(ps, loc_strdup("Name"), loc_strdup("TCF Protocol Logger"));
    peer_server_addprop(ps, loc_strdup("Proxy"), loc_strdup(""));
    serv = channel_server(ps);
    if (serv == NULL) {
        fprintf(stderr, "%s: cannot create TCF server: %s\n", progname, errno_to_str(errno));
        exit(1);
    }
    serv->new_conn = channel_new_connection;

    discovery_start();

    /* Process events - must run on the initial thread since ptrace()
     * returns ECHILD otherwise, thinking we are not the owner. */
    run_event_loop();
    return 0;
}

Back to the top