File: web.cpp

package info (click to toggle)
concordance 1.3-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 7,700 kB
  • sloc: cpp: 7,203; sh: 4,621; ansic: 882; python: 707; perl: 171; makefile: 132; xml: 34
file content (416 lines) | stat: -rw-r--r-- 12,290 bytes parent folder | download | duplicates (4)
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
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
/*
 * vim:tw=80:ai:tabstop=4:softtabstop=4:shiftwidth=4:expandtab
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * (C) Copyright Kevin Timmerman 2007
 * (C) Copyright Phil Dibowitz 2008
 */

#include <stdarg.h>
#include <string.h>
#include "libconcord.h"
#include "lc_internal.h"
#include "hid.h"
#include "remote.h"
#include "xml_headers.h"

#ifdef _WIN32
#include <winsock.h>
#else /* non _WIN32 */
#include <strings.h>
#include <sys/socket.h>
#include <netdb.h>
#include <unistd.h>
#define closesocket close
#define SOCKET int
#define SOCKET_ERROR -1
#endif

#ifdef __FreeBSD__
#include <netinet/in.h>
#endif

static const uint8_t urlencodemap[32]={
    0xFF, 0xFF, 0xFF, 0xFF,  //   0 Control chars
    0x7D,                    //  32 & % $ # " <space>
    0x98,                    //  40 / , +
    0x00,                    //  48
    0xFC,                    //  56 ? > = < ; :
    0x01,                    //  64 @
    0x00,                    //  72
    0x00,                    //  80
    0x78,                    //  88 ^ ] \ [
    0x01,                    //  96 '
    0x00,                    // 104
    0x00,                    // 112
    0x78,                    // 120 ~ } | {
    0xFF, 0xFF, 0xFF, 0xFF,  // 128
    0xFF, 0xFF, 0xFF, 0xFF,
    0xFF, 0xFF, 0xFF, 0xFF,
    0xFF, 0xFF, 0xFF, 0xFF
};

/*
 * This function does C-style string formatting, but uses a C++ string and
 * automatically handles buffer sizing.  It is intended to be used in place of
 * sprintf()/snprintf() where we don't necessarily know the required buffer
 * size in advance.  The formatted string is appended to the supplied C++
 * string.
 */
void format_string(string *str, const char *format, ...)
{
    va_list args;
    va_start(args, format);
    int size = vsnprintf(NULL, 0, format, args);
    va_end(args);
    size++; // Add room for \0
    char *buffer = new char[size];
    va_start(args, format);
    vsnprintf(buffer, size, format, args);
    va_end(args);
    *str += buffer;
    delete[] buffer;
}

static void UrlEncode(const char *in, string &out)
{
    out = "";
    const size_t len = strlen(in);
    for(size_t i = 0; i < len; ++i) {
        const char c = in[i];
        if (c == ' ') {
            out += '+';
        } else if (c == '(') {
            out += "%28";
        } else if (c == ')') {
            out += "%29";
        } else if(urlencodemap[c>>3] & (1 << (c & 7))) {
            char hex[4];
            sprintf(hex, "%%%02X", c);
            out += hex;
        } else
            out += c;
    }
}

static int Zap(string &server, const char *s1, const char *s2)
{
    int err;

    // Get the numeric address of host
    hostent* addr = gethostbyname(server.c_str());
    if (!addr) {
        report_net_error("gethostbyname()");
        return LC_ERROR_OS_NET;
    }

    // Fill in the sockaddr structure
    sockaddr_in sa;
    memcpy(&(sa.sin_addr), addr->h_addr, addr->h_length);
    sa.sin_family = AF_INET;
    sa.sin_port = htons(80);

    // Create a socket
    // SOCK_STREAM = Stream (TCP) socket
    SOCKET sock = socket(sa.sin_family, SOCK_STREAM, 0);

    // Connect
    if ((err = connect(sock,(struct sockaddr*)&sa, sizeof(sa)))) {
        report_net_error("connect()");
        return LC_ERROR_OS_NET;
    }

    debug("Connected!");

    err = send(sock, s1, strlen(s1), 0);
    if (err == SOCKET_ERROR) {
        report_net_error("send()");
        return LC_ERROR_OS_NET;
    }

    debug("%i bytes sent", err);

    err = send(sock, s2, strlen(s2), 0);
    if (err == SOCKET_ERROR) {
        report_net_error("send()");
        return LC_ERROR_OS_NET;
    }

    debug("%i bytes sent", err);

    char buf[1000];
    err = recv(sock,buf,999,0);

    if (err == SOCKET_ERROR) {
        report_net_error("recv()");
        return LC_ERROR_OS_NET;
    }

    // Show the received received data
    buf[err]=0;

    debug("Received: %s", buf);

    // Close the socket
    if ((err = closesocket(sock))) {
        report_net_error("closesocket()");
        return LC_ERROR_OS_NET;
    }

    debug("done with web post");
    
    return 0;
}

// find is the tag.
// data is the data to search through
// data_size is the size of data
// found is where we found it
// s, if passed, will hold the strong of the entire element, unless
// If find_attributes is set to true, and s is not null, will fill s with the
// attributes for the requested tag. For example, if you have:
// <ELEMENT A="B" C="D"/> and you search for a tag called "ELEMENT" the
// function will return A="B" C="D".
int GetTag(const char *find, uint8_t* data, uint32_t data_size, uint8_t *&found,
           string *s=NULL, bool find_attributes=false)
{
    char tag_name_end = '>';
    char tag_start = '<';
    char tag_end = '>';
    if (find_attributes) {
        tag_name_end = ' ';
        tag_start = '/';
        tag_end = '/';
    }

    const size_t find_len = strlen(find);
    uint8_t * search = data;

    // Consume tags until there aren't any left
    while (1) {
        // Loop searching for start of tag character
        while (1) {
            if (*search == '<') {
                break;
            }
            if (search >= data + data_size) {
                return -1;
            }
            search++;
        }
        // Validate there's enough string left to hold the tag name
        uint32_t needed_len = find_len + 2;
        uint32_t left_len = data_size - (search - data);
        if (left_len < needed_len) {
            return -1;
        }
        // Point past <, at tag name
        search++;
        // Check to see if this is the tag we want
        if (search[find_len] == tag_name_end &&
            !strnicmp(find, reinterpret_cast<const char*>(search), find_len)) {
            // Point past >, at tag content
            search += find_len + 1;

            found = search;

            /*
              * If a string pointer was passed in, then add the
              * contents of this entire tag to the string
              */
            if (s) {
                *s = "";
                /*
                 * Here we keep adding chars until the next tag
                 * which, in theory, should be the end-tag.
                 */
                while (*search && *search != tag_start) {
                    *s += *search;
                    search++;
                    if (search >= data + data_size) {
                        break;
                    }
                }
            }
            return 0;
        }

        // Loop searching for end of tag character
        while (1) {
            if (*search == tag_end) {
                break;
            }
            if (search >= data + data_size) {
                return -1;
            }
            search++;
        }
    }
}

// Given a set of XML attributes, e.g., ATTR1="VALUE1" ATTR2="VALUE2", this
// function will find a given attribute and return its value.
int GetAttribute(const char *find, string data, string *result)
{
    if ((find == NULL) || (result == NULL))
        return -1;

    size_t start_pos;
    size_t end_pos;
    string to_find = find;
    to_find.append("=\"");
    
    start_pos = data.find(to_find);
    if (start_pos == string::npos)
        return -1;
    start_pos += to_find.length();

    end_pos = data.find("\"", start_pos);
    if (end_pos == string::npos)
        return -1;

    *result = data.substr(start_pos, end_pos - start_pos);
    return 0;
}

int encode_ir_signal(uint32_t carrier_clock, uint32_t *ir_signal,
                     uint32_t ir_signal_length, string *learn_seq)
{    /*
     * Encode ir_signal into string accepted by Logitech server
     */
    char s[32];
    
    if ((learn_seq == NULL) || (ir_signal == NULL) || (ir_signal_length == 0)) {
        return LC_ERROR;
    }
    if (carrier_clock > 0xFFFF) {
        sprintf(s, "F%08X", carrier_clock);
    } else {
        sprintf(s, "F%04X", carrier_clock);
    }
    *learn_seq = s;
    for (unsigned int n = 0; n < ir_signal_length; ) {
        if (ir_signal[n] > 0xFFFF) {
            sprintf(s, "P%08X", ir_signal[n++]);
        } else {
            sprintf(s, "P%04X", ir_signal[n++]);
        }
        *learn_seq += s;
        if (ir_signal[n] > 0xFFFF) {
            sprintf(s, "S%08X", ir_signal[n++]);
        } else {
            sprintf(s, "S%04X", ir_signal[n++]);
        }
        *learn_seq += s;
    }
    return 0;
}

void add_usbnet_headers(char *post_data, TRemoteInfo &ri)
{
    sprintf(post_data+strlen(post_data), post_xml_usbnet1, ri.home_id, 
            ri.node_id, ri.tid);
    for (int i=0; i<ri.num_regions; i++) {
        sprintf(post_data+strlen(post_data), post_xml_usbnet_region,
                ri.region_ids[i], ri.region_versions[i]);
    }
    sprintf(post_data+strlen(post_data), "%s", post_xml_usbnet2);
    sprintf(post_data+strlen(post_data), "%s", ri.xml_user_rf_setting);
    sprintf(post_data+strlen(post_data), "%s", post_xml_usbnet3);
}

int Post(uint8_t *xml, uint32_t xml_size, const char *root, TRemoteInfo &ri,
         bool has_userid, bool add_cookiekeyval, bool z_post, string *learn_seq,
         string *learn_key)
{
    uint8_t *x = xml;
    int err;
    if ((err = GetTag(root, x, xml_size - (x - xml), x)))
        return err;

    string server, path, cookie, userid;

    if ((err = GetTag("SERVER", x, xml_size - (x - xml), x, &server)))
        return err;
    if ((err = GetTag("PATH", x, xml_size - (x - xml), x, &path)))
        return err;
    if ((err = GetTag("VALUE", x, xml_size - (x - xml), x, &cookie)))
        return err;
    if (has_userid) {
        uint8_t *n = 0;
        if ((err = GetTag("VALUE", x, xml_size - (x - xml), n, &userid)))
            return err;
    }

    /*
     * For some architectures the website leaves one required value out of
     * the cookie. Who knows why, but we allow the user to tell us to add
     * it.
     */
    if (add_cookiekeyval) {
        cookie += ";CookieKeyValue=";
        cookie += ri.serial1;
        cookie += ri.serial2;
        cookie += ri.serial3;
    }

    debug("Connecting to: %s", server.c_str());
    debug("Path: %s", path.c_str());
    debug("Cookie: %s", cookie.c_str());
    debug("UserId: %s", userid.c_str());

    string post;
    if (learn_seq == NULL) {
        string serial;
        format_string(&serial, "%s%s%s", ri.serial1, ri.serial2, ri.serial3);
        string post_data;
        if (z_post) {
            format_string(&post_data, z_post_xml, ri.hw_ver_major,
                    ri.hw_ver_minor, ri.flash_mfg, ri.flash_id, ri.fw_ver_major,
                    ri.fw_ver_minor);
        } else {
            format_string(&post_data, post_xml, ri.fw_ver_major,
                    ri.fw_ver_minor, ri.fw_type, serial.c_str(),
                    ri.hw_ver_major, ri.hw_ver_minor, ri.hw_ver_micro,
                    ri.flash_mfg, ri.flash_id, ri.protocol, ri.architecture,
                    ri.skin);
            format_string(&post_data, "%s", post_xml_trailer);
        }

        debug("post data: %s", post_data.c_str());

        string post_data_encoded;
        UrlEncode(post_data.c_str(), post_data_encoded);

        post = "Data=" + post_data_encoded;
    } else {
        post = "IrSequence=" + *learn_seq + "&KeyName=" + *learn_key;
    }

    if (has_userid) {
        post += "&UserId=" + userid;
    }

    debug("%s", post.c_str());

    string http_header;
    format_string(&http_header, post_header, path.c_str(), server.c_str(),
            cookie.c_str(), post.length());

    debug("%s", http_header.c_str());

    return Zap(server, http_header.c_str(), post.c_str());
}