/*
This is part of the audio CD player library
Copyright (C)1998-99 Tony Arcieri <bascule@inferno.tusculum.edu>

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 Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA  02111-1307, USA.

Based upon: 
NIST Secure Hash Algorithm 
heavily modified by Uwe Hollerbach <uh@alumni.caltech.edu>
from Peter C. Gutmann's implementation as found in
Applied Cryptography by Bruce Schneier
*/

/* XXX This file is NOT strtok() clean */

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>

#define __LIBCDAUDIO_INTERNAL

#include <cdaudio.h>
#include <cddb.h>
#include <config.h>

extern char *cddb_message;

/* cdindex-tweaked base64 encoder */
int cdindex_encode64(char *outbuffer,
		     char *inbuffer,
		     int inlen, int outlen);

#define SHA_BLOCKSIZE 64
#define SHA_VERSION 1

#define f1(x,y,z)       ((x & y) | (~x & z))
#define f2(x,y,z)       (x ^ y ^ z)
#define f3(x,y,z)       ((x & y) | (x & z) | (y & z))
#define f4(x,y,z)       (x ^ y ^ z)

#define CONST1          0x5a827999L
#define CONST2          0x6ed9eba1L
#define CONST3          0x8f1bbcdcL
#define CONST4          0xca62c1d6L

#define T32(x)  ((x) & 0xffffffffL)
#define R32(x,n)        T32(((x << n) | (x >> (32 - n))))

#define FA(n)   \
    	T = T32(R32(A,5) + f##n(B,C,D) + E + *WP++ + CONST##n); B = R32(B,30)

#define FB(n)   \
    	E = T32(R32(T,5) + f##n(A,B,C) + D + *WP++ + CONST##n); A = R32(A,30)

#define FC(n)   \
	D = T32(R32(E,5) + f##n(T,A,B) + C + *WP++ + CONST##n); T = R32(T,30)

#define FD(n)   \
	C = T32(R32(D,5) + f##n(E,T,A) + B + *WP++ + CONST##n); E = R32(E,30)

#define FE(n)   \
	B = T32(R32(C,5) + f##n(D,E,T) + A + *WP++ + CONST##n); D = R32(D,30)

#define FT(n)   \
	A = T32(R32(B,5) + f##n(C,D,E) + T + *WP++ + CONST##n); C = R32(C,30)
                    
struct sha_data {
   unsigned long digest[5];
   unsigned long count_lo, count_hi;
   unsigned char data[SHA_BLOCKSIZE];
   int local;
};

static void
sha_init(struct sha_data *sha)
{
   sha->digest[0] = 0x67452301L;
   sha->digest[1] = 0xefcdab89L;
   sha->digest[2] = 0x98badcfeL;
   sha->digest[3] = 0x10325476L;
   sha->digest[4] = 0xc3d2e1f0L;
   sha->count_lo = 0L;
   sha->count_hi = 0L;
   sha->local = 0;
}

static void 
sha_transform(struct sha_data *sha)
{
   int i;
   unsigned char *dp;
   unsigned long T, A, B, C, D, E, W[80], *WP;

   dp = sha->data;

#if SIZEOF_LONG == 4
#ifndef WORDS_BIGENDIAN
#define SWAP_DONE
   for (i = 0; i < 16; ++i) {  
      T = *((unsigned long *) dp);
      dp += 4;
      W[i] =  ((T << 24) & 0xff000000) | ((T <<  8) & 0x00ff0000) |
              ((T >>  8) & 0x0000ff00) | ((T >> 24) & 0x000000ff);
   }
#endif
   
#ifdef WORDS_BIGENDIAN
#define SWAP_DONE
   for (i = 0; i < 16; ++i) {  
      T = *((unsigned long *) dp);
      dp += 4;
      W[i] = T32(T);
   }
#endif
#endif
   
#if SIZEOF_LONG == 8
#ifndef WORDS_BIGENDIAN
#define SWAP_DONE 
   for (i = 0; i < 16; i += 2) {
      T = *((unsigned long *) dp);  
      dp += 8;
      W[i] =  ((T << 24) & 0xff000000) | ((T <<  8) & 0x00ff0000) |
              ((T >>  8) & 0x0000ff00) | ((T >> 24) & 0x000000ff);
      T >>= 32;
      W[i+1] = ((T << 24) & 0xff000000) | ((T <<  8) & 0x00ff0000) |
               ((T >>  8) & 0x0000ff00) | ((T >> 24) & 0x000000ff);
   }
#endif

#ifdef WORDS_BIGENDIAN
#define SWAP_DONE
   for (i = 0; i < 16; i += 2) {
      T = *((unsigned long *) dp);  
      dp += 8;
      W[i] = T32(T >> 32);
      W[i+1] = T32(T);
   }
#endif
#endif

    for (i = 16; i < 80; ++i) {
        W[i] = W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16];
#if (SHA_VERSION == 1)
        W[i] = R32(W[i], 1);
#endif
    }
    A = sha->digest[0];
    B = sha->digest[1];
    C = sha->digest[2];
    D = sha->digest[3];
    E = sha->digest[4];
    WP = W;
   
    FA(1); FB(1); FC(1); FD(1); FE(1); FT(1); FA(1); FB(1); FC(1); FD(1);
    FE(1); FT(1); FA(1); FB(1); FC(1); FD(1); FE(1); FT(1); FA(1); FB(1);
    FC(2); FD(2); FE(2); FT(2); FA(2); FB(2); FC(2); FD(2); FE(2); FT(2);
    FA(2); FB(2); FC(2); FD(2); FE(2); FT(2); FA(2); FB(2); FC(2); FD(2);
    FE(3); FT(3); FA(3); FB(3); FC(3); FD(3); FE(3); FT(3); FA(3); FB(3);
    FC(3); FD(3); FE(3); FT(3); FA(3); FB(3); FC(3); FD(3); FE(3); FT(3);
    FA(4); FB(4); FC(4); FD(4); FE(4); FT(4); FA(4); FB(4); FC(4); FD(4);
    FE(4); FT(4); FA(4); FB(4); FC(4); FD(4); FE(4); FT(4); FA(4); FB(4);
    sha->digest[0] = T32(sha->digest[0] + E);
    sha->digest[1] = T32(sha->digest[1] + T);
    sha->digest[2] = T32(sha->digest[2] + A);
    sha->digest[3] = T32(sha->digest[3] + B);
    sha->digest[4] = T32(sha->digest[4] + C);
}

static void 
sha_update(struct sha_data *sha, unsigned char *buffer, int count)
{
   int i;   
   unsigned long clo;
   
   clo = T32(sha->count_lo + ((unsigned long) count << 3));
   if(clo < sha->count_lo)
     ++sha->count_hi;
   sha->count_lo = clo;
   sha->count_hi += (unsigned long) count >> 29;
   if(sha->local) {
      i = SHA_BLOCKSIZE - sha->local;
      if(i > count)
	i = count;
      memcpy(((unsigned char *) sha->data) + sha->local, buffer, i);
      count -= i;
      buffer += i;
      sha->local += i;
      if(sha->local == SHA_BLOCKSIZE)
	sha_transform(sha);
      else return;
   }
   
   while (count >= SHA_BLOCKSIZE) {
      memcpy(sha->data, buffer, SHA_BLOCKSIZE);
      buffer += SHA_BLOCKSIZE;
      count -= SHA_BLOCKSIZE;
      sha_transform(sha);
   }
   
   memcpy(sha->data, buffer, count);
   sha->local = count;
}

static void 
sha_final(unsigned char digest[20], struct sha_data *sha)
{ 
   int count;
   unsigned long lo_bit_count, hi_bit_count;

   lo_bit_count = sha->count_lo;
   hi_bit_count = sha->count_hi; 
   count = (int) ((lo_bit_count >> 3) & 0x3f);
   ((unsigned char *) sha->data)[count++] = 0x80;
   if (count > SHA_BLOCKSIZE - 8) {  
      memset(((unsigned char *) sha->data) + count,
	     0, SHA_BLOCKSIZE - count);
      sha_transform(sha);
      memset((unsigned char *) sha->data, 0, SHA_BLOCKSIZE - 8);
   } else
     memset(((unsigned char *) sha->data) + count,
	    0, SHA_BLOCKSIZE - 8 - count);
   
   sha->data[56] = (hi_bit_count >> 24) & 0xff;
   sha->data[57] = (hi_bit_count >> 16) & 0xff;
   sha->data[58] = (hi_bit_count >>  8) & 0xff;
   sha->data[59] = (hi_bit_count >>  0) & 0xff;
   sha->data[60] = (lo_bit_count >> 24) & 0xff;
   sha->data[61] = (lo_bit_count >> 16) & 0xff;
   sha->data[62] = (lo_bit_count >>  8) & 0xff;
   sha->data[63] = (lo_bit_count >>  0) & 0xff;
   sha_transform(sha);
   digest[0] = (unsigned char) ((sha->digest[0] >> 24) & 0xff);
   digest[1] = (unsigned char) ((sha->digest[0] >> 16) & 0xff);
   digest[2] = (unsigned char) ((sha->digest[0] >> 8) & 0xff);
   digest[3] = (unsigned char) ((sha->digest[0]) & 0xff);
   digest[4] = (unsigned char) ((sha->digest[1] >> 24) & 0xff);
   digest[5] = (unsigned char) ((sha->digest[1] >> 16) & 0xff);
   digest[6] = (unsigned char) ((sha->digest[1] >> 8) & 0xff);
   digest[7] = (unsigned char) ((sha->digest[1]) & 0xff);
   digest[8] = (unsigned char) ((sha->digest[2] >> 24) & 0xff);
   digest[9] = (unsigned char) ((sha->digest[2] >> 16) & 0xff);
   digest[10] = (unsigned char) ((sha->digest[2] >> 8) & 0xff);
   digest[11] = (unsigned char) ((sha->digest[2]) & 0xff);
   digest[12] = (unsigned char) ((sha->digest[3] >> 24) & 0xff);
   digest[13] = (unsigned char) ((sha->digest[3] >> 16) & 0xff);
   digest[14] = (unsigned char) ((sha->digest[3] >> 8) & 0xff);
   digest[15] = (unsigned char) ((sha->digest[3]) & 0xff);
   digest[16] = (unsigned char) ((sha->digest[4] >> 24) & 0xff);
   digest[17] = (unsigned char) ((sha->digest[4] >> 16) & 0xff);
   digest[18] = (unsigned char) ((sha->digest[4] >> 8) & 0xff);
   digest[19] = (unsigned char) ((sha->digest[4]) & 0xff);
}

int
cdindex_direct_discid(struct disc_info disc, char *discid, int len)
{
   int index;
   struct sha_data sha;
   char digest[20], temp[9];
   
   memset(sha.data, '\0', 64);
   sha_init(&sha);
   
   snprintf(temp, 9, "%02X", disc.disc_first_track);
   sha_update(&sha, temp, strlen(temp));
   snprintf(temp, 9, "%02X", disc.disc_total_tracks);
   sha_update(&sha, temp, strlen(temp));
   snprintf(temp, 9, "%08X",
	    disc.disc_track[disc.disc_total_tracks].track_lba + 150);
   sha_update(&sha, temp, strlen(temp));
   for(index = 0; index < 99; index++) {
      if(index < disc.disc_total_tracks)
	snprintf(temp, 9, "%08X",
		 disc.disc_track[index].track_lba + 150);
      else
	snprintf(temp, 9, "%08X", 0);
      sha_update(&sha, temp, strlen(temp));
   }
   sha_final(digest, &sha);
   return cdindex_encode64(discid, digest, 20, len);
}

int
__internal_cdindex_discid(struct disc_info disc, char *discid, int len)
{
   return cdindex_direct_discid(disc, discid, len);
}

int
cdindex_discid(int cd_desc, char *discid, int len)
{
   struct disc_info disc;
   
   if(cd_stat(cd_desc, &disc) < 0)
     return -1;
   
   if(!disc.disc_present)
     return -1;
   
   if(__internal_cdindex_discid(disc, discid, len) < 0)
     return -1;
   
   return 0;
}

int
cdindex_read_line(int sock, char *inbuffer, int len)
{
   int index;
   char inchar;

   for(index = 0; index < len; index++) {
      if(read(sock, &inchar, 1) <= 0)
	return -1;
      if(inchar == '\n') {
         inbuffer[index] = '\0';
         return 0;
      }
      inbuffer[index] = inchar;
   }

   return index;
}

int
cdindex_connect_server(struct cddb_host host,
		       struct cddb_server *proxy,
		       char *http_string, int len)
{
   int sock;
   
   if(proxy == NULL) {
      if((sock = cddb_connect(&host.host_server)) < 0)
	return -1;
   } else {
      if((sock = cddb_connect(proxy)) < 0)
	return -1;
   }
   
   snprintf(http_string, len, "GET http://%s:%d/%s",
	    host.host_server.server_name,
	    host.host_server.server_port,
	    host.host_addressing);
      
   return sock;
}

void
strip_whitespace(char *outbuffer, char *inbuffer, int len)
{
   int index, outdex = 0, readwhite = 1;
   
   for(index = 0; index < len; index++) {
      switch(inbuffer[index]) {
       case '\n':
	 outbuffer[outdex] = '\0';
	 return;
       case '\0':
	 outbuffer[outdex] = '\0';
	 return;
       case ' ':
	 if(readwhite == 0) {
	    outbuffer[outdex++] = ' ';
	    readwhite = 1;
	 }
	 break;
       case '\t':
	 if(readwhite == 0) {
	    outbuffer[outdex++] = ' ';
	    readwhite = 1;
	 }
	 break;
       default:
	 outbuffer[outdex++] = inbuffer[index];
	 readwhite = 0;
      }
   }
}
   
static void
cdindex_process_line(char *line, struct disc_data *data)
{
   char *var, *value;
   
   if(strchr(line, ':') == NULL)
     return;
   
   var = strtok(line, ":");
   if(var == NULL)
     return;
   
   value = strtok(NULL, ":");
   
   if(value == NULL)
     value = "";
   else
     value += 1;

   if(strcmp(var, "Artist") == 0)
     strncpy(data->data_artist, value, 256);
   else if(strcmp(var, "Album") == 0)
	strncpy(data->data_title, value, 256);
   else if(strcmp(var, "Tracks") == 0);
   else if(strncmp(var, "Track", 5) == 0)
     strncpy(data->data_track[strtol((char *)var + 5, NULL, 10) - 1]
	     .track_name, value, 256);
   else if(strncmp(var, "Artist", 6) == 0)
     strncpy(data->data_track[strtol((char *)var + 6, NULL, 10) - 1]
	     .track_artist, value, 256);
}

int
cdindex_read(int cd_desc, int sock,
	     struct disc_data *data,
	     char *http_string)
{
   struct cddb_host host;
   struct disc_info disc;
   char outbuffer[512];
   char inbuffer[256];
   char string[512];
   
   memset(data, '\0', sizeof(struct disc_data));
   if(cd_stat(cd_desc, &disc) < 0)
     return -1;
   
   data->data_id = __internal_cddb_discid(disc);
      
   if(cdindex_discid(cd_desc, data->data_cdindex_id, CDINDEX_ID_SIZE) < 0)
      return -1;
      
   data->data_revision = 0;
   data->data_genre = CDDB_MISC;
   
   snprintf(outbuffer, 512, "%s?id=%s HTTP/1.0\n\n",
	    http_string, data->data_cdindex_id);
   
   write(sock, outbuffer, strlen(outbuffer));
   
   cdindex_read_line(sock, inbuffer, 256);
   if(strncmp(inbuffer, "HTTP/1.1 200", 12) == 0) {
      cddb_skip_http_header(sock);
      cdindex_read_line(sock, inbuffer, 256);
      if(strncmp("NumMatches: 0", inbuffer, 13) == 0)
	return -1;
      while(cdindex_read_line(sock, inbuffer, 256) >= 0)
	cdindex_process_line(inbuffer, data);
   } else if(strncmp(inbuffer, "HTTP/1.1 302", 12) == 0) {
      while(cdindex_read_line(sock, inbuffer, 256) >= 0) {
	 if(strncmp(inbuffer, "Location:", 9) == 0) {
	    strtok(inbuffer, " ");
	    cddb_process_url(&host, strtok(NULL, " "));
	    close(sock);
	    if((sock = cdindex_connect_server(host, NULL, string, 512)) < 0)
	      return -1;
	    return cdindex_read(cd_desc, sock, data, string);
	 }
      }
      return -1;
   } else
     return -1;
   
   return 0;
}

int
cdindex_generate_new_entry(int cd_desc, struct disc_data *data)
{  
   if(cddb_read_data(cd_desc, data) < 0)
     cddb_generate_unknown_entry(cd_desc, data);
   
   return 0;
}

int
cdindex_read_disc_data(int cd_desc, struct disc_data *data)
{
   FILE *cdindex_xml;
   int track;
   char root_dir[256], file[256], inbuffer[512], procbuffer[512];
   struct disc_info disc;
   struct stat st;
   
   if(getenv("HOME") == NULL) {
      strncpy(cddb_message, "$HOME is not set!", 256);
      return -1;
   }
   
   snprintf(root_dir, 256, "%s/.cdindex", getenv("HOME"));
   
   if(stat(root_dir, &st) < 0) {
      if(errno != ENOENT)
	return -1;
      else {
	 cdindex_generate_new_entry(cd_desc, data);

	 return 0;
      }
   } else {
      if(!S_ISDIR(st.st_mode)) {
	 errno = ENOTDIR;
	 return -1;
      }
   }
   
   if(cd_stat(cd_desc, &disc) < 0)
     return -1;
   
   data->data_id = __internal_cddb_discid(disc);
   
   if(__internal_cdindex_discid(disc, data->data_cdindex_id,
				CDINDEX_ID_SIZE) < 0)
     return -1;
   
   data->data_revision = 0;
   data->data_genre = CDDB_UNKNOWN;
   
   snprintf(file, 256, "%s/%s", root_dir, data->data_cdindex_id);
   if(stat(file, &st) < 0) {
      if(errno != ENOENT)
	return -1;
      else {
	 cdindex_generate_new_entry(cd_desc, data);
	  
	 return 0;
      }
   }
   
   cdindex_xml = fopen(file, "r");
   while(!feof(cdindex_xml)) {
      fgets(inbuffer, 512, cdindex_xml);
      strip_whitespace(procbuffer, inbuffer, 512);
      if(procbuffer[0] != '<')
	continue;
      
      if(strncmp(procbuffer, "<Title>", 7) == 0) {
	 strtok(procbuffer, ">");
	 strncpy(inbuffer, strtok(NULL, ">"), 512);
	 strncpy(data->data_title, strtok(inbuffer, "<"), 256);
      } else if(strncmp(procbuffer, "<SingleArtistCD>", 16) == 0)
	data->data_artist_type = CDINDEX_SINGLE_ARTIST;
      else if(strncmp(procbuffer, "<MultipleArtistCD>", 18) == 0) {
	 data->data_artist_type = CDINDEX_MULTIPLE_ARTIST;
	 strncpy(data->data_artist, "(various)", 256);
      } else if(data->data_artist_type == CDINDEX_SINGLE_ARTIST &&
		strncmp(procbuffer, "<Artist>", 8) == 0) {
	 strtok(procbuffer, ">");
	 strncpy(inbuffer, strtok(NULL, ">"), 512);
	 strncpy(data->data_artist, strtok(inbuffer, "<"), 256);
      } else if(strncmp(procbuffer, "<Track", 6) == 0) {
	 strtok(procbuffer, "\"");
	 track = strtol(strtok(NULL, "\""), NULL, 10);
	 if(track > 0)
	   track--;
	 fgets(inbuffer, 512, cdindex_xml);
	 strip_whitespace(procbuffer, inbuffer, 512);
	 if(data->data_artist_type == CDINDEX_MULTIPLE_ARTIST) {
	    strtok(procbuffer, ">");
	    strncpy(inbuffer, strtok(NULL, ">"), 512);
	    strncpy(data->data_track[track].track_artist,
		    strtok(inbuffer, "<"), 256);
	    fgets(inbuffer, 512, cdindex_xml);
	    strip_whitespace(procbuffer, inbuffer, 512);
	 }
	 strtok(procbuffer, ">");
	 strncpy(inbuffer, strtok(NULL, ">"), 512);
	 strncpy(data->data_track[track].track_name,
		 strtok(inbuffer, "<"), 256);
      }
   }
   
   fclose(cdindex_xml);
   
   return 0;
}

int
cdindex_write_data(int cd_desc, struct disc_data *data)
{
   FILE *cdindex_xml;
   int tracks;
   char root_dir[256], file[256];
   struct stat st;
   struct disc_info disc;
   
   if(getenv("HOME") == NULL) {
      strncpy(cddb_message, "$HOME is not set!", 256);
      return -1;
   }
   
   if(cd_stat(cd_desc, &disc) < 0)
     return -1;
  
   data->data_id = __internal_cddb_discid(disc);
   
   if(__internal_cdindex_discid(disc, data->data_cdindex_id,
				CDINDEX_ID_SIZE) < 0)
     return -1;
   
   snprintf(root_dir, 256, "%s/.cdindex", getenv("HOME"));
   snprintf(file, 256, "%s/%s", root_dir, data->data_cdindex_id);
   
   if(stat(root_dir, &st) < 0) {
      if(errno != ENOENT)
	return -1;
      else
	mkdir(root_dir, 0755);
   } else {
      if(!S_ISDIR(st.st_mode)) {
	 errno = ENOTDIR;
	 return -1;
      }
   }
   
   if((cdindex_xml = fopen(file, "w")) == NULL)
     return -1;
   
   fputs("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n",
	 cdindex_xml);
   fputs("<!DOCTYPE CDInfo SYSTEM "
	 "\"http://www.freeamp.org/dtd/CDInfo.dtd\">\n\n",
	 cdindex_xml);
   fputs("<CDInfo>\n\n", cdindex_xml);
   fprintf(cdindex_xml, "   <Title>%s</Title>\n", data->data_title);
   fprintf(cdindex_xml, "   <NumTracks>%d</NumTracks>\n\n",
	   disc.disc_total_tracks);
   fputs("   <IdInfo>\n", cdindex_xml);
   fputs("      <DiskId>\n", cdindex_xml);
   fprintf(cdindex_xml, "         <Id>%s</Id>\n",
	   data->data_cdindex_id);
   fprintf(cdindex_xml, "         <TOC First=\"%d\" Last=\"%d\">\n",
	   disc.disc_first_track, disc.disc_total_tracks);
   fprintf(cdindex_xml, "            <Offset Num=\"0\">%d</Offset>\n",
	   disc.disc_track[disc.disc_total_tracks].track_lba);
   for(tracks = 0; tracks < disc.disc_total_tracks; tracks++)
     fprintf(cdindex_xml, "            <Offset Num=\"%d\">%d</Offset>\n",
	     tracks + 1, disc.disc_track[tracks].track_lba);
   fputs("         </TOC>\n", cdindex_xml);
   fputs("      </DiskId>\n", cdindex_xml);
   fputs("   </IdInfo>\n\n", cdindex_xml);
   if(strcmp(data->data_artist, "(various)") != 0) {
      fputs("   <SingleArtistCD>\n", cdindex_xml);
      fprintf(cdindex_xml, "      <Artist>%s</Artist>\n",
	      data->data_artist);
      for(tracks = 0; tracks < disc.disc_total_tracks; tracks++) {
	 fprintf(cdindex_xml, "      <Track Num=\"%d\">\n", tracks + 1);
	 fprintf(cdindex_xml, "         <Name>%s</Name>\n",
		 data->data_track[tracks].track_name);
	 fputs("      </Track>\n", cdindex_xml);
      }
      fputs("   </SingleArtistCD>\n\n", cdindex_xml);
   } else {
      fputs("   <MultipleArtistCD>\n", cdindex_xml);
      for(tracks = 0; tracks < disc.disc_total_tracks; tracks++) {
	 fprintf(cdindex_xml, "      <Track Num=\"%d\">\n", tracks + 1);
	 fprintf(cdindex_xml, "         <Artist>%s</Artist>\n",
		 data->data_track[tracks].track_artist);
	 fprintf(cdindex_xml, "         <Name>%s</Name>\n",
		 data->data_track[tracks].track_name);
	 fputs("      </Track>\n", cdindex_xml);
      }
      fputs("   </MultipleArtistCD>\n\n", cdindex_xml);
   }
   fputs("</CDInfo>\n\n\n\n\n", cdindex_xml);
   fclose(cdindex_xml);
   
   return 0;
}

int
cdindex_mc_read(int cd_desc, int sock, struct disc_mc_data *data, char *http_string)
{
   struct disc_data *indata;
   
   if((indata = malloc(sizeof(struct disc_data))) == NULL)
     return -1;
   
   if(cdindex_read(cd_desc, sock, indata, http_string) < 0) {
      free(indata);
      return -1;
   }
   
   if(cddb_mc_alloc(cd_desc, data) < 0) {
      free(indata);
      return -1;
   }
   
   if(cddb_mc_copy_from_data(data, indata) < 0) {
      free(indata);
      cddb_mc_free(data);
      return -1;
   }
   
   free(indata);
   return 0;
}

int
cdindex_mc_read_disc_data(int cd_desc, struct disc_mc_data *data)
{
   struct disc_data *indata;
   
   if((indata = malloc(sizeof(struct disc_data))) == NULL)
     return -1;
   
   if(cdindex_read_disc_data(cd_desc, indata) < 0) {
      free(indata);
      return -1;
   }
   
   if(cddb_mc_alloc(cd_desc, data) < 0) {
      free(indata);
      return -1;
   }
   
   if(cddb_mc_copy_from_data(data, indata) < 0) {
      free(indata);
      cddb_mc_free(data);
      return -1;
   }
   
   free(indata);
   return 0;
}

int
cdindex_mc_write_disc_data(int cd_desc, struct disc_mc_data *data)
{
   struct disc_data *outdata;
   
   if((outdata = malloc(sizeof(struct disc_data))) == NULL)
     return -1;
   
   if(cddb_data_copy_from_mc(outdata, data) < 0) {
      free(outdata);
      return -1;
   }
   
   if(cdindex_write_data(cd_desc, outdata) < 0) {
      free(outdata);
      return -1;
   }
   
   free(outdata);
   return 0;
}

int
cdindex_mc_generate_new_entry(int cd_desc, struct disc_mc_data *data)
{
   return cddb_mc_generate_new_entry(cd_desc, data);
}

int
cdindex_stat_disc_data(int cd_desc, struct cddb_entry *entry)
{
   struct disc_info disc;
   struct stat st;
   char root_dir[256], file[256];

   if(getenv("HOME") == NULL) {
      strncpy(cddb_message, "$HOME is not set!", 256);
      return -1;
   }
   
   if(cd_stat(cd_desc, &disc) < 0)
     return -1;
   
   entry->entry_id = __internal_cddb_discid(disc);
   
   if(__internal_cdindex_discid(disc, entry->entry_cdindex_id,
				CDINDEX_ID_SIZE) < 0)
     return -1;
   
   snprintf(root_dir, 256, "%s/.cdindex", getenv("HOME"));


   if(stat(root_dir, &st) < 0) {
      if(errno != ENOENT)
        return -1;
      else {
         entry->entry_present = 0;
         return 0;
      }
   } else {
      if(!S_ISDIR(st.st_mode)) {
         errno = ENOTDIR;
         return -1;
      }
   }
   
   snprintf(file, 256, "%s/%s", root_dir, entry->entry_cdindex_id);
   if(stat(file, &st) == 0) {
      entry->entry_timestamp = st.st_mtime;
      entry->entry_present = 1;
      entry->entry_genre = CDDB_MISC;
      
      return 0;
   }
   
   entry->entry_present = 0;
   
   return 0;
}

int
cdindex_http_submit(int cd_desc, struct cddb_host host,
		    struct cddb_server *proxy)
{
   FILE *cdindex_entry;
   int sock, token[3];
   char outbuffer[512], cdindex_file[256];
   struct stat st;
   struct cddb_entry entry;
   struct disc_status status;
   
   if(getenv("HOME") == NULL) {
      strncpy(cddb_message, "$HOME is not set!", 256);
      return -1;
   }
   
   if(cd_poll(cd_desc, &status) < 0)
     return -1;
   
   if(!status.status_present)
     return -1;
   
   cdindex_stat_disc_data(cd_desc, &entry);
   
   if(!entry.entry_present) {
      strncpy(cddb_message, "No CD Index entry present in cache", 256);
      return -1;
   }
   
   if(proxy != NULL) {
      if((sock = cddb_connect(proxy)) < 0) {
	 strncpy(cddb_message, strerror(errno), 256);
	 return -1;
      }
      snprintf(outbuffer, 512, "POST http://%s:%d/%s HTTP/1.0\n",
	       host.host_server.server_name,
	       host.host_server.server_port,
	       CDINDEX_SUBMIT_CGI);
   } else {
      if((sock = cddb_connect(&host.host_server)) < 0) {
	 strncpy(cddb_message, strerror(errno), 256);
	 return -1;
      }
      snprintf(outbuffer, 512, "POST /%s HTTP/1.0\n", CDINDEX_SUBMIT_CGI);
   }
   write(sock, outbuffer, strlen(outbuffer));
   
   strncpy(outbuffer, "Content-Type: text/plain\n", 512);
   write(sock, outbuffer, strlen(outbuffer));
   
   snprintf(cdindex_file, sizeof cdindex_file, "%s/.cdindex/%s",
	    getenv("HOME"), entry.entry_cdindex_id);
   stat(cdindex_file, &st);
   
   snprintf(outbuffer, 512, "Content-Length: %d\n\r\n",
	    (int) st.st_size + 1);
   write(sock, outbuffer, strlen(outbuffer));
   
   cdindex_entry = fopen(cdindex_file, "r");
   while(!feof(cdindex_entry)) {
      fgets(outbuffer, 512, cdindex_entry);
      write(sock, outbuffer, strlen(outbuffer));
   }
   
   cddb_skip_http_header(sock);
   
   if(cddb_read_token(sock, token) < 0)
     return -1;
   
   if(token[0] != 1)
     return -1;
   
   shutdown(sock, 2);
   close(sock);
   
   return 0;
}