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1.5 ! espie 1: /* $OpenBSD: cddb.c,v 1.4 2002/04/18 22:17:04 espie Exp $ */
1.1 espie 2: /*
3: * Copyright (c) 2002 Marc Espie.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: *
14: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
15: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
18: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: #include <sys/types.h>
28: #include <sys/socket.h>
29: #include <netinet/in.h>
30: #include <sys/cdio.h>
31: #include <err.h>
32: #include <netdb.h>
33: #include <stdio.h>
34: #include <stdlib.h>
35: #include <string.h>
36: #include <unistd.h>
37: #include <vis.h>
38: #include "extern.h"
39:
1.3 espie 40: unsigned long cddb_sum(unsigned long);
41: void send_hello(FILE *);
42: void send_query(FILE *, int, struct cd_toc_entry *);
43: int further_query(FILE *, char *);
44: int connect_to(const char *, const char *);
45: int parse_connect_to(const char *, const char *);
46: char * get_line(FILE *);
1.1 espie 47: char * get_answer(FILE *);
1.3 espie 48: void verify_track_names(char **, int, struct cd_toc_entry *);
1.5 ! espie 49: void safe_copy(char **, const char *);
1.1 espie 50:
51: unsigned long
52: cddb_sum(unsigned long v)
53: {
54: unsigned long sum = 0;
55:
56: while (v > 0) {
57: sum += v % 10;
58: v /= 10;
59: }
60: return (sum);
61: }
62:
1.3 espie 63: unsigned long
1.1 espie 64: cddb_discid(int n, struct cd_toc_entry *e)
65: {
66: unsigned long sum;
67: int i;
68:
69: sum = 0;
1.3 espie 70: for (i =0; i < n; i++)
1.1 espie 71: sum += cddb_sum(entry2time(e+i));
1.3 espie 72: return (((sum % 0xff) << 24) |
1.1 espie 73: ((entry2time(e+n) - entry2time(e)) << 8) | n);
74: }
75:
76: void
77: send_hello(FILE *cout)
78: {
79: char hostname[MAXHOSTNAMELEN];
80:
81: if (gethostname(hostname, sizeof(hostname)) == -1)
82: strcpy(hostname, "unknown");
1.3 espie 83: fprintf(cout, "CDDB HELLO %s %s cdio " VERSION "\r\n",
1.1 espie 84: getlogin(), hostname);
85: fflush(cout);
86: }
87:
1.3 espie 88: void
1.1 espie 89: send_query(FILE *f, int n, struct cd_toc_entry *e)
90: {
91: int i;
92:
93: fprintf(f, "cddb query %8lx %d", cddb_discid(n, e), n);
94: for (i = 0; i < n; i++)
95: fprintf(f, " %lu", entry2frames(e+i));
96: fprintf(f, " %lu\r\n", (entry2frames(e+n)-entry2frames(e)) /75);
97: }
98:
99: #define MAXSIZE 256
100: char copy_buffer[MAXSIZE];
101:
1.5 ! espie 102: void
! 103: safe_copy(char **p, const char *title)
1.1 espie 104: {
105: strnvis(copy_buffer, title, MAXSIZE-1, VIS_TAB|VIS_NL);
1.5 ! espie 106: if (*p == NULL)
! 107: *p = strdup(copy_buffer);
! 108: else {
! 109: char *n = malloc(strlen(*p) + strlen(copy_buffer) + 1);
! 110: if (n == NULL)
! 111: return;
! 112: strcpy(n, *p);
! 113: strcat(n, copy_buffer);
! 114: free(*p);
! 115: *p = n;
! 116: }
1.1 espie 117: }
118:
119: int
120: further_query(FILE *cout, char *line)
121: {
122: char *key;
123: char *title;
124:
125: key = strchr(line, ' ');
126: if (!key)
127: return 0;
128: *key++ = 0;
129: title = strchr(key, ' ');
130: if (!title)
131: return 0;
132: *title++ = 0;
133: strnvis(copy_buffer, title, MAXSIZE-1, VIS_TAB|VIS_NL);
134: printf("%s", copy_buffer);
135: strnvis(copy_buffer, line, MAXSIZE-1, VIS_TAB|VIS_NL);
136: printf("(%s)\n", copy_buffer);
137: fprintf(cout, "CDDB READ %s %s\r\n", line, key);
138: fflush(cout);
139: return 1;
140: }
141:
142:
143: int
144: connect_to(const char *host, const char *serv)
145: {
146: int s = -1;
147: struct addrinfo hints, *res0 = NULL, *res;
148: int error;
149:
150: memset(&hints, 0, sizeof hints);
151: hints.ai_family = PF_UNSPEC;
152: hints.ai_socktype = SOCK_STREAM;
153:
154: error = getaddrinfo(host, serv, &hints, &res0);
155: if (error) {
156: warnx("%s", gai_strerror(error));
157: return -1;
158: }
159:
160: for (res = res0; res; res = res->ai_next) {
161: s = socket(res->ai_family, res->ai_socktype,
162: res->ai_protocol);
163: if (s == -1)
164: continue;
165: if (connect(s, res->ai_addr, res->ai_addrlen) == -1) {
166: close(s);
167: s = -1;
168: continue;
169: }
170: break;
171: }
172: if (s == -1)
173: warn("cddb");
174: freeaddrinfo(res0);
175: return s;
176: }
177:
178: int
179: parse_connect_to(const char *host_port, const char *port)
180: {
181: int s;
182: char *last, *host;
183:
184: host = (char *)host_port;
185:
186: last = strrchr(host_port, ':');
187: if (last != 0 && !(last != host && last[-1] == ':')) {
188: port = last + 1;
189: host = malloc(last - host_port + 1);
190: if (!host)
191: return -1;
192: memcpy(host, host_port, last-host_port);
193: host[last-host_port] = 0;
194: }
195: s = connect_to(host, port);
196: if (host != host_port)
197: free(host);
198: return s;
199: }
200:
201: char *
202: get_line(FILE *cin)
203: {
204: char *line;
205: size_t len;
206:
207: line = fgetln(cin, &len);
208: if (!line)
209: return NULL;
210: if (len == 0)
211: return NULL;
212: if (line[len-1] == '\n')
213: line[--len] = 0;
214: if (len != 0 && line[len-1] == '\r')
215: line[--len] = 0;
216: return line;
217: }
218:
219: char *
220: get_answer(FILE *cin)
221: {
222: char *line;
223:
224: line = get_line(cin);
225: if (*line != '2')
226: return NULL;
227: else
228: return line;
229: }
230:
231: void
232: verify_track_names(char **names, int n, struct cd_toc_entry *e)
233: {
234: int i;
235:
236: for (i = 0; i < n; i++) {
237: if (names[i] == 0)
238: names[i] = strdup(e->control & 4 ? "data" : "audio");
239: }
240: }
241:
1.3 espie 242: char **
1.1 espie 243: cddb(const char *host_port, int n, struct cd_toc_entry *e, char *arg)
244: {
245: int s = -1;
246: FILE *cin = NULL;
247: FILE *cout = NULL;
248: char *type;
249: char *line;
250: char **result = NULL;
251: int i;
252:
253: s = parse_connect_to(host_port, "cddb");
254: if (s == -1)
255: goto end;
256: cin = fdopen(s, "r");
257: if (!cin) {
258: warn("cddb: fdopen");
259: goto end;
260: }
261: cout = fdopen(s, "w");
262: s = -1;
263: if (!cout) {
264: warn("cddb: fdopen");
265: goto end;
266: }
267: line = get_answer(cin);
268: if (!line) {
269: warnx("cddb: won't talk to us");
270: goto end;
271: }
272:
273: send_hello(cout);
274: line = get_answer(cin);
275: if (!line) {
276: warnx("cddb: problem in hello");
277: goto end;
278: }
279:
280: send_query(cout, n, e);
281: fflush(cout);
282: line = get_answer(cin);
283: if (!line) {
284: warnx("cddb: problem in query");
285: goto end;
286: }
287: type = strchr(line, ' ');
288: if (!type)
289: goto end;
290: *type++ = 0;
291: /* no match or other issue */
292: if (strcmp(line, "202") == 0) {
293: printf("cddb: No match in database\n");
294: goto end;
295: }
296: if (strcmp(line, "211") == 0 || strcmp(line, "212") == 0) {
297: int number = atoi(arg);
298: if (number == 0) {
299: if (strcmp(line, "211") == 0)
300: printf("cddb: multiple matches\n");
301: else {
302: printf("cddb: inexact match\n");
303: number = 1;
304: }
305: }
306: if (number == 0) {
307: for (i = 1;; i++) {
308: line = get_line(cin);
309: if (strcmp(line, ".") == 0)
310: goto end;
311: printf("%d: %s\n", i, line);
312: }
313: } else {
314: int ok = 0;
315:
316: for (i = 1;; i++) {
317: line = get_line(cin);
318: if (!line)
319: break;
320: if (strcmp(line, ".") == 0)
321: break;
322: if (i == number)
323: ok = further_query(cout, line);
324: }
325: if (!ok)
326: goto end;
327: }
328: } else if (strcmp(line, "200") != 0 || !further_query(cout, type))
329: goto end;
330: result = malloc(sizeof(char *) * n+1);
331: if (!result)
332: goto end;
333: for (i = 0; i <= n; i++)
334: result[i] = NULL;
335: line = get_answer(cin);
336: if (!line)
337: goto end2;
338: for (;;) {
339: long k;
340: char *end;
341:
342: line = get_line(cin);
343: if (!line)
344: goto end2;
345: if (strcmp(line, ".") == 0)
346: goto end;
347: if (strncmp(line, "TTITLE", 6) != 0)
348: continue;
349: line += 6;
350: k = strtol(line, &end, 10);
351: if (*end++ != '=')
352: continue;
353: if (k >= n)
354: continue;
1.5 ! espie 355: safe_copy(&result[k], end);
1.1 espie 356: }
357: fprintf(cout, "QUIT\r\n");
358: verify_track_names(result, n, e);
359: goto end;
360: end2:
361: free(result);
362: result = NULL;
363: end:
364: if (cout)
1.2 deraadt 365: fclose(cout);
1.1 espie 366: if (cin)
1.2 deraadt 367: fclose(cin);
1.1 espie 368: if (s != -1)
1.2 deraadt 369: close(s);
1.1 espie 370: return result;
371: }
372:
373: void
374: free_names(char **names)
375: {
376: int i;
377:
378: for (i = 0; names[i]; i++)
379: free(names[i]);
380: free(names);
381: }