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589 lines
13 KiB
589 lines
13 KiB
/*
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* $Id$
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*
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* This file is part of WorkMan, the civilized CD player library
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* (c) 1991-1997 by Steven Grimm (original author)
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* (c) by Dirk Försterling (current 'author' = maintainer)
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* The maintainer can be contacted by his e-mail address:
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* milliByte@DeathsDoor.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA
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*
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*
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* establish connection to cddb server and get data
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* socket stuff gotten from gnu port of the finger command
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*
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* provided by Sven Oliver Moll
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/signal.h>
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#include <ctype.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include "include/wm_config.h"
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#include "include/wm_struct.h"
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#include "include/wm_cdinfo.h"
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#include "include/wm_helpers.h"
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#include "include/wm_cddb.h"
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struct wm_cddb cddb;
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extern struct wm_cdinfo thiscd;
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static int cur_cddb_protocol;
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static char *cur_cddb_server;
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static char *cur_cddb_mail_adress;
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static char *cur_cddb_path_to_cgi;
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static char *cur_cddb_proxy_server;
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/* local prototypes */
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int cddb_sum(int);
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char *string_split(char *line, char delim);
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void string_makehello(char *line, char delim);
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int connect_open(void);
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void connect_close(void);
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void connect_getline(char *line);
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void connect_read_entry(void);
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void cddbp_send(const char *line);
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void cddbp_read(char *category, unsigned int id);
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void http_send(char* line);
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void http_read(char *category, unsigned int id);
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void cddb_request(void);
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/* local prototypes END */
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static int Socket;
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static FILE *Connection;
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/*
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*
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*/
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void
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cddb_cur2struct(void)
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{
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cddb.protocol = cur_cddb_protocol;
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strcpy(cddb.cddb_server, cur_cddb_server);
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strcpy(cddb.mail_adress, cur_cddb_mail_adress);
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strcpy(cddb.path_to_cgi, cur_cddb_path_to_cgi);
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strcpy(cddb.proxy_server, cur_cddb_proxy_server);
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} /* cddb_cur2struct() */
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/*
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*
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*/
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void
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cddb_struct2cur(void)
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{
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cur_cddb_protocol = cddb.protocol;
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cur_cddb_server = (cddb.cddb_server);
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cur_cddb_mail_adress = (cddb.mail_adress);
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cur_cddb_path_to_cgi = (cddb.path_to_cgi);
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cur_cddb_proxy_server = (cddb.proxy_server);
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} /* cddb_struct2cur() */
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/*
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* Subroutine from cddb_discid
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*/
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int
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cddb_sum(int n)
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{
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char buf[12],
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*p;
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int ret = 0;
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/* For backward compatibility this algorithm must not change */
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sprintf(buf, "%lu", (unsigned long)n);
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for (p = buf; *p != '\0'; p++)
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ret += (*p - '0');
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return (ret);
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} /* cddb_sum() */
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/*
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* Calculate the discid of a CD according to cddb
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*/
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unsigned long
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cddb_discid(void)
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{
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int i,
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t,
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n = 0;
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/* For backward compatibility this algorithm must not change */
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for (i = 0; i < thiscd.ntracks; i++) {
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n += cddb_sum(thiscd.trk[i].start / 75);
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/*
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* Just for demonstration (See below)
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*
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* t += (thiscd.trk[i+1].start / 75) -
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* (thiscd.trk[i ].start / 75);
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*/
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}
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/*
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* Mathematics can be fun. Example: How to reduce a full loop to
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* a simple statement. The discid algorhythm is so half-hearted
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* developed that it doesn't even use the full 32bit range.
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* But it seems to be always this way: The bad standards will be
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* accepted, the good ones turned down.
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* Boy, you pulled out the /75. This is not correct here, because
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* this calculation needs the integer division for both .start
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* fields.
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*/
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t = (thiscd.trk[thiscd.ntracks].start / 75)
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- (thiscd.trk[0].start / 75);
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return ((n % 0xff) << 24 | t << 8 | thiscd.ntracks);
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} /* cddb_discid() */
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/*
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* Split a string into two components according to the first occurrence of
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* the delimiter.
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*/
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char *
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string_split(char *line, char delim)
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{
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char *p1;
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for (p1=line;*p1;p1++)
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{
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if(*p1 == delim)
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{
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*p1 = 0;
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return ++p1;
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}
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}
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return (NULL);
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} /* string_split() */
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/*
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* Generate the hello string according to the cddb protocol
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* delimiter is either ' ' (cddbp) or '+' (http)
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*/
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void
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string_makehello(char *line,char delim)
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{
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char mail[84],*host;
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strcpy(mail,cddb.mail_adress);
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host=string_split(mail,'@');
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sprintf(line,"%shello%c%s%c%s%c%s%c%s",
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delim == ' ' ? "cddb " : "&",
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delim == ' ' ? ' ' : '=',
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mail,delim,
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host,delim,
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WORKMAN_NAME,delim,
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WORKMAN_VERSION);
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} /* string_makehello() */
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/*
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* Open the TCP connection to the cddb/proxy server
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*/
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int
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connect_open(void)
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{
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char *host;
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struct hostent *hp;
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struct sockaddr_in soc_in;
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int port;
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if(cddb.protocol == 3) /* http proxy */
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host = wm_strdup(cddb.proxy_server);
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else
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host = wm_strdup(cddb.cddb_server);
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/*
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* t=string_split(host,':');
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*/
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port=atoi(string_split(host,':'));
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if(!port)
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port=8880;
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#ifndef NDEBUG
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printf("%s:%d\n",host,port);
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#endif
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hp =gethostbyname(host);
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if (hp == NULL)
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{
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static struct hostent def;
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static struct in_addr defaddr;
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static char *alist[1];
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static char namebuf[128];
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int inet_addr();
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defaddr.s_addr = inet_addr(host);
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if ((int) defaddr.s_addr == -1)
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{
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#ifndef NDEBUG
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printf("unknown host: %s\n", host);
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#endif
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return (-1);
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}
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strcpy(namebuf, host);
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def.h_name = namebuf;
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def.h_addr_list = alist, def.h_addr = (char *)&defaddr;
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def.h_length = sizeof (struct in_addr);
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def.h_addrtype = AF_INET;
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def.h_aliases = 0;
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hp = &def;
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}
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soc_in.sin_family = hp->h_addrtype;
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bcopy(hp->h_addr, (char *)&soc_in.sin_addr, hp->h_length);
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soc_in.sin_port = htons(port);
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Socket = socket(hp->h_addrtype, SOCK_STREAM, 0);
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if (Socket < 0)
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{
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perror("socket");
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return (-1);
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}
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fflush(stdout);
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if (connect(Socket, (struct sockaddr *)&soc_in, sizeof (soc_in)) < 0)
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{
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perror("connect");
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close(Socket);
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return (-1);
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}
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Connection = fdopen(Socket, "r");
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return (0);
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} /* connect_open() */
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/*
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* Close the connection
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*/
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void
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connect_close(void)
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{
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(void)fclose(Connection);
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close(Socket);
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} /* connect_close() */
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/*
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* Get a line from the connection with CR and LF stripped
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*/
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void
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connect_getline(char *line)
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{
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char c;
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while ((c = getc(Connection)) != '\n')
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{
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*line = c;
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if ((c != '\r') && (c != (char)0xff))
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line++;
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}
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*line=0;
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} /* connect_getline() */
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/*
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* Read the CD data from the server and place them into the cd struct
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*/
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void
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connect_read_entry(void)
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{
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char type;
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int trknr;
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char *t,*t2,tempbuf[2000];
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while(strcmp(tempbuf,"."))
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{
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connect_getline(tempbuf);
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t=string_split(tempbuf,'=');
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if(t != NULL)
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{
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type=tempbuf[0];
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if(strncmp("TITLE",tempbuf+1,5))
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continue;
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if('D' == type)
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{
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/*
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* Annahme: "Interpret / Titel" ist falsch.
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* Daher: NULL-String erwarten.
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*/
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t2=string_split(t,'/');
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if(t2 == NULL)
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t2 = t;
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if(*t2 == ' ')
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t2++;
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strncpy(cd->cdname,t2,sizeof(cd->cdname)-1);
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cd->cdname[sizeof(cd->cdname)-1]='\0';
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for(t2=t;*t2;t2++)
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{
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if((*t2 == ' ') && (*(t2+1) == 0))
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*t2=0;
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}
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strncpy(cd->artist,t,sizeof(cd->artist)-1);
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cd->artist[sizeof(cd->artist)-1]='\0';
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}
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if('T' == type)
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{
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trknr=atoi(tempbuf+6);
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/*
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* printf("Track %d:%s\n",trknr,t);
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*/
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wm_strmcpy(&cd->trk[trknr].songname,t);
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}
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/*
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* fprintf(stderr, "%s %s\n",tempbuf,t);
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*/
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}
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}
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} /* connect_read_entry() */
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/*
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* Send a command to the server using cddbp
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*/
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void
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cddbp_send(const char *line)
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{
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write(Socket, line, strlen(line));
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write(Socket, "\n", 1);
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} /* cddbp_send() */
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/*
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* Send the "read from cddb" command to the server using cddbp
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*/
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void
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cddbp_read(char *category, unsigned int id)
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{
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char tempbuf[84];
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sprintf(tempbuf, "cddb read %s %08x", category, id);
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cddbp_send(tempbuf);
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} /* cddbp_read() */
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/*
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* Send a command to the server using http
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*/
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void
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http_send(char* line)
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{
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char tempbuf[2000];
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write(Socket, "GET ", 4);
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#ifndef NDEBUG
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printf("GET ");
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#endif
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if(cddb.protocol == 3)
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{
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write(Socket, "http://", 7);
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write(Socket, cddb.cddb_server, strlen(cddb.cddb_server));
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#ifndef NDEBUG
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printf("http://%s",cddb.cddb_server);
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#endif
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}
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write(Socket, cddb.path_to_cgi, strlen(cddb.path_to_cgi));
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write(Socket, "?cmd=" ,5);
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write(Socket, line, strlen(line));
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#ifndef NDEBUG
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printf("%s?cmd=%s",cddb.path_to_cgi,line);
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#endif
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string_makehello(tempbuf,'+');
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write(Socket, tempbuf, strlen(tempbuf));
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#ifndef NDEBUG
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printf("%s",tempbuf);
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#endif
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write(Socket, "&proto=1 HTTP/1.0\n\n", 19);
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#ifndef NDEBUG
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printf("&proto=1 HTTP/1.0\n");
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#endif
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do
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connect_getline(tempbuf);
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while(strcmp(tempbuf,""));
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} /* http_send() */
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/*
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* Send the "read from cddb" command to the server using http
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*/
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void
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http_read(char *category, unsigned int id)
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{
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char tempbuf[84];
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sprintf(tempbuf, "cddb+read+%s+%08x", category, id);
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http_send(tempbuf);
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} /* http_read() */
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/*
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* The main routine called from the ui
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*/
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void
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cddb_request(void)
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{
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int i;
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char tempbuf[2000];
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extern int cur_ntracks;
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int status;
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char category[21];
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unsigned int id;
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strcpy(cddb.cddb_server,"localhost:888");
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strcpy(cddb.mail_adress,"svolli@bigfoot.com");
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/*
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* cddb.protocol = 1;
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*/
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wipe_cdinfo();
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switch(cddb.protocol)
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{
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case 1: /* cddbp */
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#ifndef NDEBUG
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printf("USING CDDBP\n");
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printf("open\n");
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#endif
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connect_open();
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connect_getline(tempbuf);
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#ifndef NDEBUG
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printf("[%s]\n",tempbuf);
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#endif
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/*
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* if(atoi(tempbuf) == 201) return;
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*/
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/*
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* strcpy(tempbuf,"cddb hello svolli bigfoot.com Eierkratzer eins");
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*/
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string_makehello(tempbuf,' ');
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#ifndef NDEBUG
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fprintf(stderr, "%s\n", tempbuf);
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#endif
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cddbp_send(tempbuf);
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connect_getline(tempbuf);
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#ifndef NDEBUG
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printf("[%s]\n",tempbuf);
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printf("query\n");
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#endif
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sprintf(tempbuf, "cddb query %08x %d",thiscd.cddbid,thiscd.ntracks);
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for (i = 0; i < cur_ntracks; i++)
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if (thiscd.trk[i].section < 2)
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sprintf(tempbuf + strlen(tempbuf), " %d",
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thiscd.trk[i].start);
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sprintf(tempbuf + strlen(tempbuf), " %d\n", thiscd.length);
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#ifndef NDEBUG
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printf(">%s<\n",tempbuf);
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#endif
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cddbp_send(tempbuf);
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connect_getline(tempbuf);
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#ifndef NDEBUG
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printf("[%s]\n",tempbuf);
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#endif
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status=atoi(tempbuf);
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/*
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* fprintf(stderr, "status:%d\n",status);
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* fprintf(stderr,"category:%s\n",category);
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* fprintf(stderr,"id:%s\n",id);
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*/
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if(status == 200) /* Exact match */
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{
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sscanf(tempbuf,"%d %20s %08x",&status,category,&id);
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cddbp_read(category,id);
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connect_read_entry();
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}
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if(status == 211) /* Unexact match, multiple possible
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* Hack: always use first. */
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{
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connect_getline(tempbuf);
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sscanf(tempbuf,"%20s %08x",category,&id);
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while(strcmp(tempbuf,"."))
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connect_getline(tempbuf);
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cddbp_read(category,id);
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connect_read_entry();
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}
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cddbp_send("quit");
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connect_close();
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#ifndef NDEBUG
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printf("close\n");
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#endif
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break;
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case 2: /* http */
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case 3: /* http proxy */
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#ifndef NDEBUG
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printf("USING HTTP%s\n",
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(cddb.protocol == 3) ? " WITH PROXY" : "");
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printf("query\n");
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#endif
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sprintf(tempbuf, "cddb+query+%08x+%d",thiscd.cddbid,thiscd.ntracks);
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for (i = 0; i < cur_ntracks; i++)
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if (thiscd.trk[i].section < 2)
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sprintf(tempbuf + strlen(tempbuf), "+%d",
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thiscd.trk[i].start);
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sprintf(tempbuf + strlen(tempbuf), "+%d", thiscd.length);
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#ifndef NDEBUG
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printf(">%s<\n",tempbuf);
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#endif
|
|
connect_open();
|
|
http_send(tempbuf);
|
|
connect_getline(tempbuf);
|
|
#ifndef NDEBUG
|
|
printf("[%s]\n",tempbuf);
|
|
#endif
|
|
status=atoi(tempbuf);
|
|
/*
|
|
* fprintf(stderr, "status:%d\n",status);
|
|
* fprintf(stderr, "category:%s\n",category);
|
|
* fprintf(stderr, "id:%s\n",id);
|
|
*/
|
|
|
|
if(status == 200) /* Exact match */
|
|
{
|
|
connect_close();
|
|
connect_open();
|
|
sscanf(tempbuf,"%d %20s %08x",&status,category,&id);
|
|
http_read(category,id);
|
|
connect_read_entry();
|
|
}
|
|
|
|
if(status == 211) /* Unexact match, multiple possible
|
|
* Hack: always use first. */
|
|
{
|
|
connect_getline(tempbuf);
|
|
sscanf(tempbuf,"%20s %08x",category,&id);
|
|
while(strcmp(tempbuf,"."))
|
|
connect_getline(tempbuf);
|
|
connect_close();
|
|
connect_open();
|
|
http_read(category,id);
|
|
connect_read_entry();
|
|
}
|
|
/* moved close above break */
|
|
connect_close();
|
|
break;
|
|
default: /* off */
|
|
break;
|
|
}
|
|
} /* cddb_request() */
|
|
|