/*
* $Id: cddb.c,v 1.2 1999/02/14 09:50:42 dirk Exp $
*
* This file is part of WorkMan, the civilized CD player library
* (c) 1991-1997 by Steven Grimm (original author)
* (c) by Dirk Försterling (current 'author' = maintainer)
* The maintainer can be contacted by his e-mail address:
* milliByte@DeathsDoor.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* establish connection to cddb server and get data
* socket stuff gotten from gnu port of the finger command
*
* provided by Sven Oliver Moll
*
*/
static char cddb_id[] = "$Id: cddb.c,v 1.2 1999/02/14 09:50:42 dirk Exp $";
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/signal.h>
#include <ctype.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include "include/wm_config.h"
#include "include/wm_struct.h"
#include "include/wm_cdinfo.h"
#include "include/wm_helpers.h"
/*
* This is for identifying WorkMan at CDDB servers
*/
#define PROGRAM WORKMAN_NAME
#define VERSION WORKMAN_VERSION
struct wm_cddb cddb;
int cur_cddb_protocol;
char *cur_cddb_server;
char *cur_cddb_mail_adress;
char *cur_cddb_path_to_cgi;
char *cur_cddb_proxy_server;
int Socket;
FILE *Connection;
/*
*
*/
void
cddb_cur2struct(void)
{
cddb.protocol = cur_cddb_protocol;
strcpy(cddb.cddb_server, cur_cddb_server);
strcpy(cddb.mail_adress, cur_cddb_mail_adress);
strcpy(cddb.path_to_cgi, cur_cddb_path_to_cgi);
strcpy(cddb.proxy_server, cur_cddb_proxy_server);
} /* cddb_cur2struct() */
/*
*
*/
void
cddb_struct2cur(void)
{
cur_cddb_protocol = cddb.protocol;
cur_cddb_server = (cddb.cddb_server);
cur_cddb_mail_adress = (cddb.mail_adress);
cur_cddb_path_to_cgi = (cddb.path_to_cgi);
cur_cddb_proxy_server = (cddb.proxy_server);
} /* cddb_struct2cur() */
/*
* Subroutine from cddb_discid
*/
int
cddb_sum(int n)
{
char buf[12],
*p;
int ret = 0;
/* For backward compatibility this algorithm must not change */
sprintf(buf, "%lu", (unsigned long)n);
for (p = buf; *p != '\0'; p++)
ret += (*p - '0');
return (ret);
} /* cddb_sum() */
/*
* Calculate the discid of a CD according to cddb
*/
unsigned long
cddb_discid(void)
{
int i,
t,
n = 0;
/* For backward compatibility this algorithm must not change */
for (i = 0; i < thiscd.ntracks; i++) {
n += cddb_sum(thiscd.trk[i].start / 75);
/*
* Just for demonstration (See below)
*
* t += (thiscd.trk[i+1].start / 75) -
* (thiscd.trk[i ].start / 75);
*/
}
/*
* Mathematics can be fun. Example: How to reduce a full loop to
* a simple statement. The discid algorhythm is so half-hearted
* developed that it doesn't even use the full 32bit range.
* But it seems to be always this way: The bad standards will be
* accepted, the good ones turned down.
*/
t = (thiscd.trk[thiscd.ntracks].start-thiscd.trk[0].start)/75;
return ((n % 0xff) << 24 | t << 8 | thiscd.ntracks);
} /* cddb_discid() */
/*
* Split a string into two components according to the first occurance of
* the delimiter.
*/
char *
string_split(char *line, char delim)
{
char *p1;
for (p1=line;*p1;p1++)
{
if(*p1 == delim)
{
*p1 = 0;
return ++p1;
}
}
return (NULL);
} /* string_split() */
/*
* Generate the hello string according to the cddb protocol
* delimiter is either ' ' (cddbp) or '+' (http)
*/
void
string_makehello(char *line,char delim)
{
char mail[84],*host;
strcpy(mail,cddb.mail_adress);
host=string_split(mail,'@');
sprintf(line,"%shello%c%s%c%s%c%s%c%s",
delim == ' ' ? "cddb " : "&",
delim == ' ' ? ' ' : '=',
mail,delim,
host,delim,
PROGRAM,delim,
VERSION);
} /* string_makehello() */
/*
* Open the TCP connection to the cddb/proxy server
*/
int
connect_open(void)
{
char *host;
struct hostent *hp;
struct sockaddr_in soc_in;
int port;
if(cddb.protocol == 3) /* http proxy */
host = strdup(cddb.proxy_server);
else
host = strdup(cddb.cddb_server);
/*
* t=string_split(host,':');
*/
port=atoi(string_split(host,':'));
if(!port)
port=8880;
printf("%s:%d\n",host,port);
hp =gethostbyname(host);
if (hp == NULL)
{
static struct hostent def;
static struct in_addr defaddr;
static char *alist[1];
static char namebuf[128];
int inet_addr();
defaddr.s_addr = inet_addr(host);
if (defaddr.s_addr == -1)
{
printf("unknown host: %s\n", host);
return (-1);
}
strcpy(namebuf, host);
def.h_name = namebuf;
def.h_addr_list = alist, def.h_addr = (char *)&defaddr;
def.h_length = sizeof (struct in_addr);
def.h_addrtype = AF_INET;
def.h_aliases = 0;
hp = &def;
}
soc_in.sin_family = hp->h_addrtype;
bcopy(hp->h_addr, (char *)&soc_in.sin_addr, hp->h_length);
soc_in.sin_port = htons(port);
Socket = socket(hp->h_addrtype, SOCK_STREAM, 0);
if (Socket < 0)
{
perror("socket");
return (-1);
}
fflush(stdout);
if (connect(Socket, (struct sockaddr *)&soc_in, sizeof (soc_in)) < 0)
{
perror("connect");
close(Socket);
return (-1);
}
Connection = fdopen(Socket, "r");
return (0);
} /* connect_open() */
/*
* Close the connection
*/
void
connect_close(void)
{
(void)fclose(Connection);
close(Socket);
} /* connect_close() */
/*
* Get a line from the connection with CR and LF stripped
*/
void
connect_getline(char *line)
{
char c;
while ((c = getc(Connection)) != '\n')
{
*line = c;
if ((c != '\r') && (c != (char)0xff))
line++;
}
*line=0;
} /* connect_getline() */
/*
* Read the CD data from the server and place them into the cd struct
*/
void
connect_read_entry(void)
{
char type;
int trknr;
char *t,*t2,tempbuf[2000];
while(strcmp(tempbuf,"."))
{
connect_getline(tempbuf);
t=string_split(tempbuf,'=');
if(t != NULL)
{
type=tempbuf[0];
if(strncmp("TITLE",tempbuf+1,5))
continue;
if('D' == type)
{
/*
* Annahme: "Interpret / Titel" ist falsch.
* Daher: NULL-String erwarten.
*/
t2=string_split(t,'/');
if(t2 == NULL)
t2 = t;
if(*t2 == ' ')
t2++;
strcpy(cd->cdname,t2);
for(t2=t;*t2;t2++)
{
if((*t2 == ' ') && (*(t2+1) == 0))
*t2=0;
}
strcpy(cd->artist,t);
}
if('T' == type)
{
trknr=atoi(tempbuf+6);
/*
* printf("Track %d:%s\n",trknr,t);
*/
wm_strmcpy(&cd->trk[trknr].songname,t);
}
/*
* fprintf(stderr, "%s %s\n",tempbuf,t);
*/
}
}
} /* connect_read_entry() */
/*
* Send a command to the server using cddbp
*/
void
cddbp_send(char *line)
{
write(Socket, line, strlen(line));
write(Socket, "\n", 1);
} /* cddbp_send() */
/*
* Send the "read from cddb" command to the server using cddbp
*/
void
cddbp_read(char *category, unsigned int id)
{
char tempbuf[84];
sprintf(tempbuf, "cddb read %s %08x", category, id);
cddbp_send(tempbuf);
} /* cddbp_read() */
/*
* Send a command to the server using http
*/
void
http_send(char* line)
{
char tempbuf[2000];
write(Socket, "GET ", 4);
printf("GET ");
if(cddb.protocol == 3)
{
write(Socket, "http://", 7);
write(Socket, cddb.cddb_server, strlen(cddb.cddb_server));
printf("http://%s",cddb.cddb_server);
}
write(Socket, cddb.path_to_cgi, strlen(cddb.path_to_cgi));
write(Socket, "?cmd=" ,5);
write(Socket, line, strlen(line));
printf("%s?cmd=%s",cddb.path_to_cgi,line);
string_makehello(tempbuf,'+');
write(Socket, tempbuf, strlen(tempbuf));
printf("%s",tempbuf);
write(Socket, "&proto=1 HTTP/1.0\n\n", 19);
printf("&proto=1 HTTP/1.0\n");
do
connect_getline(tempbuf);
while(strcmp(tempbuf,""));
} /* http_send() */
/*
* Send the "read from cddb" command to the server using http
*/
void
http_read(char *category, unsigned int id)
{
char tempbuf[84];
sprintf(tempbuf, "cddb+read+%s+%08x", category, id);
http_send(tempbuf);
} /* http_read() */
/*
* The main routine called from the ui
*/
void
cddb_request(void)
{
int i;
char tempbuf[2000];
extern int cur_ntracks;
int status;
char category[20];
unsigned int id;
strcpy(cddb.cddb_server,"localhost:888");
strcpy(cddb.mail_adress,"svolli@bigfoot.com");
/*
* cddb.protocol = 1;
*/
wipe_cdinfo();
switch(cddb.protocol)
{
case 1: /* cddbp */
printf("USING CDDBP\n");
printf("open\n");
connect_open();
connect_getline(tempbuf);
printf("[%s]\n",tempbuf);
/*
* if(atoi(tempbuf) == 201) return;
*/
/*
* strcpy(tempbuf,"cddb hello svolli bigfoot.com Eierkratzer eins");
*/
string_makehello(tempbuf,' ');
fprintf(stderr, "%s\n", tempbuf);
cddbp_send(tempbuf);
connect_getline(tempbuf);
printf("[%s]\n",tempbuf);
printf("query\n");
sprintf(tempbuf, "cddb query %08x %d",thiscd.cddbid,thiscd.ntracks);
for (i = 0; i < cur_ntracks; i++)
if (thiscd.trk[i].section < 2)
sprintf(tempbuf + strlen(tempbuf), " %d",
thiscd.trk[i].start);
sprintf(tempbuf + strlen(tempbuf), " %d\n", thiscd.length);
printf(">%s<\n",tempbuf);
cddbp_send(tempbuf);
connect_getline(tempbuf);
printf("[%s]\n",tempbuf);
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 */
{
sscanf(tempbuf,"%d %s %08x",&status,category,&id);
cddbp_read(category,id);
connect_read_entry();
}
if(status == 211) /* Unexact match, multiple possible
* Hack: always use first. */
{
connect_getline(tempbuf);
sscanf(tempbuf,"%s %08x",category,&id);
while(strcmp(tempbuf,"."))
connect_getline(tempbuf);
cddbp_read(category,id);
connect_read_entry();
}
cddbp_send("quit");
connect_close();
printf("close\n");
break;
case 2: /* http */
case 3: /* http proxy */
printf("USING HTTP%s\n",
(cddb.protocol == 3) ? " WITH PROXY" : "");
printf("query\n");
sprintf(tempbuf, "cddb+query+%08x+%d",thiscd.cddbid,thiscd.ntracks);
for (i = 0; i < cur_ntracks; i++)
if (thiscd.trk[i].section < 2)
sprintf(tempbuf + strlen(tempbuf), "+%d",
thiscd.trk[i].start);
sprintf(tempbuf + strlen(tempbuf), "+%d", thiscd.length);
printf(">%s<\n",tempbuf);
connect_open();
http_send(tempbuf);
connect_getline(tempbuf);
printf("[%s]\n",tempbuf);
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 %s %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,"%s %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() */