1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/header.c	Fri Sep 26 17:05:23 2008 +0200
     1.3 @@ -0,0 +1,259 @@
     1.4 +/*  MasqMail
     1.5 +    Copyright (C) 2000 Oliver Kurth
     1.6 +
     1.7 +    This program is free software; you can redistribute it and/or modify
     1.8 +    it under the terms of the GNU General Public License as published by
     1.9 +    the Free Software Foundation; either version 2 of the License, or
    1.10 +    (at your option) any later version.
    1.11 +
    1.12 +    This program is distributed in the hope that it will be useful,
    1.13 +    but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.14 +    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.15 +    GNU General Public License for more details.
    1.16 +
    1.17 +    You should have received a copy of the GNU General Public License
    1.18 +    along with this program; if not, write to the Free Software
    1.19 +    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    1.20 +*/
    1.21 +#include "masqmail.h"
    1.22 +
    1.23 +header_name header_names[] =
    1.24 +{
    1.25 +  { "From", HEAD_FROM, },
    1.26 +  { "Sender", HEAD_SENDER, },
    1.27 +  { "To", HEAD_TO, },
    1.28 +  { "Cc", HEAD_CC, },
    1.29 +  { "Bcc", HEAD_BCC, },
    1.30 +  { "Date", HEAD_DATE, },
    1.31 +  { "Message-Id", HEAD_MESSAGE_ID, },
    1.32 +  { "Reply-To", HEAD_REPLY_TO, },
    1.33 +  { "Subject", HEAD_SUBJECT, },
    1.34 +  { "Return-Path", HEAD_RETURN_PATH, },
    1.35 +  { "Envelope-To", HEAD_ENVELOPE_TO, },
    1.36 +  { "Received", HEAD_RECEIVED },
    1.37 +};
    1.38 +
    1.39 +/* this was borrowed from exim and slightly changed */
    1.40 +gchar *rec_timestamp()
    1.41 +{
    1.42 +  static gchar buf[64];
    1.43 +  int len;
    1.44 +  
    1.45 +  time_t now = time(NULL);
    1.46 +  struct tm *t = localtime(&now);
    1.47 +
    1.48 +  int diff_hour, diff_min;
    1.49 +  struct tm local;
    1.50 +  struct tm *gmt;
    1.51 +
    1.52 +  memcpy(&local, t, sizeof(struct tm));
    1.53 +  gmt = gmtime(&now);
    1.54 +  diff_min = 60*(local.tm_hour - gmt->tm_hour) + local.tm_min - gmt->tm_min;
    1.55 +  if (local.tm_year != gmt->tm_year)
    1.56 +    diff_min += (local.tm_year > gmt->tm_year)? 1440 : -1440;
    1.57 +  else if (local.tm_yday != gmt->tm_yday)
    1.58 +    diff_min += (local.tm_yday > gmt->tm_yday)? 1440 : -1440;
    1.59 +  diff_hour = diff_min/60;
    1.60 +  diff_min  = abs(diff_min - diff_hour*60);
    1.61 +
    1.62 +  len = strftime(buf, sizeof(buf), "%a, ", &local);
    1.63 +  g_snprintf(buf + len, sizeof(buf) - len, "%02d ", local.tm_mday);
    1.64 +  len += strlen(buf + len);
    1.65 +  len += strftime(buf + len, sizeof(buf) - len, "%b %Y %H:%M:%S", &local);
    1.66 +  g_snprintf(buf + len, sizeof(buf) - len, " %+03d%02d", diff_hour, diff_min);
    1.67 +
    1.68 +  return buf;
    1.69 +}
    1.70 +
    1.71 +/* finds list of headers matching id
    1.72 +   if id == HEAD_UNKNOWN and header == NULL finds all unknown headers
    1.73 +   else finds all headers matching header
    1.74 +*/
    1.75 +GList *find_header(GList *hdr_list, header_id id, gchar *hdr_str)
    1.76 +{
    1.77 +  GList *found_list = NULL;
    1.78 +  GList *node;
    1.79 +
    1.80 +  if((id != HEAD_UNKNOWN) || (hdr_str == NULL)){
    1.81 +    foreach(hdr_list, node){
    1.82 +      header *hdr = (header *)(node->data);
    1.83 +      if(hdr->id == id)
    1.84 +        found_list = g_list_append(found_list, hdr);
    1.85 +    }
    1.86 +  }else{
    1.87 +    foreach(hdr_list, node){
    1.88 +      header *hdr = (header *)(node->data);
    1.89 +      gchar buf[64], *q = buf, *p = hdr->header;
    1.90 +      
    1.91 +      while(*p != ':' && q < buf+63 && *p) *(q++) = *(p++);
    1.92 +      *q = 0;
    1.93 +      
    1.94 +      if(strcasecmp(buf, hdr_str) == 0)
    1.95 +        found_list = g_list_append(found_list, hdr);
    1.96 +    }
    1.97 +  }
    1.98 +  return found_list;
    1.99 +}
   1.100 +
   1.101 +void header_unfold(header *hdr)
   1.102 +{
   1.103 +  gchar *tmp_hdr = g_malloc(strlen(hdr->header));
   1.104 +  gchar *p = hdr->header, *q = tmp_hdr;
   1.105 +  gboolean flag = FALSE;
   1.106 +
   1.107 +  while(*p){
   1.108 +    if(*p != '\n')
   1.109 +      *(q++) = *p;
   1.110 +    else
   1.111 +      flag = TRUE;
   1.112 +    p++;
   1.113 +  }
   1.114 +  *(q++) = '\n';
   1.115 +
   1.116 +  if(flag){
   1.117 +    gchar *new_hdr;
   1.118 +
   1.119 +    g_free(hdr->header);
   1.120 +    new_hdr = g_strdup(tmp_hdr);
   1.121 +    g_free(tmp_hdr);
   1.122 +    hdr->value = new_hdr + (hdr->value - hdr->header);
   1.123 +    hdr->header = new_hdr;
   1.124 +  }
   1.125 +}
   1.126 +
   1.127 +#define MAX_HDR_LEN 72
   1.128 +void header_fold(header *hdr)
   1.129 +{
   1.130 +  gint len = strlen(hdr->header);
   1.131 +  gchar *p, *q;
   1.132 +  /* size is probably overestimated, but so we are on the safe side */
   1.133 +  gchar *tmp_hdr = g_malloc(len + 2*len/MAX_HDR_LEN);
   1.134 +
   1.135 +  p = hdr->header;
   1.136 +  q = tmp_hdr;
   1.137 +
   1.138 +  if(p[len-1] == '\n')
   1.139 +    p[len-1] = 0;
   1.140 +
   1.141 +  while(*p){
   1.142 +    gint i,l;
   1.143 +    gchar *pp;
   1.144 +    
   1.145 +    /* look forward and find potential break points */
   1.146 +    i = 0; l = -1;
   1.147 +    pp = p;
   1.148 +    while(*pp && (i < MAX_HDR_LEN)){
   1.149 +      if((*pp == ' ') || (*pp == '\t'))
   1.150 +	l = i;
   1.151 +      pp++;
   1.152 +      i++;
   1.153 +    }
   1.154 +    if(!*pp) l = pp-p; /* take rest, if EOS found */
   1.155 +
   1.156 +    if(l == -1){
   1.157 +      /* no potential break point was found within MAX_HDR_LEN
   1.158 +       so advance further until the next */
   1.159 +      while(*pp && *pp != ' ' && *pp != '\t'){
   1.160 +	pp++;
   1.161 +	i++;
   1.162 +      }
   1.163 +      l = i;
   1.164 +    }
   1.165 +
   1.166 +    /* copy */
   1.167 +    i = 0;
   1.168 +    while(i < l){
   1.169 +      *(q++) = *(p++);
   1.170 +      i++;
   1.171 +    }
   1.172 +    *(q++) = '\n';
   1.173 +    *(q++) = *(p++); /* this is either space, tab or 0 */
   1.174 +  }
   1.175 +  {
   1.176 +    gchar *new_hdr;
   1.177 +    
   1.178 +    g_free(hdr->header);
   1.179 +    new_hdr = g_strdup(tmp_hdr);
   1.180 +    g_free(tmp_hdr);
   1.181 +    hdr->value = new_hdr + (hdr->value - hdr->header);
   1.182 +    hdr->header = new_hdr;
   1.183 +  }
   1.184 +}
   1.185 +
   1.186 +header *create_header(header_id id, gchar *fmt, ...)
   1.187 +{
   1.188 +  gchar *p;
   1.189 +  header *hdr;
   1.190 +  va_list args;
   1.191 +  va_start(args, fmt);
   1.192 +
   1.193 +  if((hdr = g_malloc(sizeof(header)))){
   1.194 +
   1.195 +    hdr->id = id;
   1.196 +    hdr->header = g_strdup_vprintf(fmt, args);
   1.197 +    hdr->value = NULL;
   1.198 +
   1.199 +    p = hdr->header;
   1.200 +    while(*p && *p != ':') p++;
   1.201 +    if(*p)
   1.202 +      hdr->value = p+1;
   1.203 +  }
   1.204 +
   1.205 +  va_end(args);
   1.206 +  return hdr;
   1.207 +}
   1.208 +
   1.209 +void destroy_header(header *hdr)
   1.210 +{
   1.211 +  if(hdr){
   1.212 +    if(hdr->header) g_free(hdr->header);
   1.213 +    g_free(hdr);
   1.214 +  }
   1.215 +}
   1.216 +
   1.217 +header *copy_header(header *hdr)
   1.218 +{
   1.219 +  header *new_hdr = NULL;
   1.220 +
   1.221 +  if(hdr){
   1.222 +    if((new_hdr = g_malloc(sizeof(header)))){
   1.223 +      new_hdr->id = hdr->id;
   1.224 +      new_hdr->header = g_strdup(hdr->header);
   1.225 +      new_hdr->value = new_hdr->header + (hdr->value - hdr->header);
   1.226 +    }
   1.227 +  }
   1.228 +  return new_hdr;
   1.229 +}
   1.230 +
   1.231 +header *get_header(gchar *line)
   1.232 +{
   1.233 +  gchar *p = line;
   1.234 +  gchar buf[64], *q = buf;
   1.235 +  gint i;
   1.236 +  header *hdr;
   1.237 +  
   1.238 +  while(*p && (*p != ':') && (q < buf+63)) *(q++) = *(p++);
   1.239 +  *q = 0;
   1.240 +  
   1.241 +  if(*p != ':') return NULL;
   1.242 +
   1.243 +  hdr = g_malloc(sizeof(header));
   1.244 +
   1.245 +  hdr->value = NULL;
   1.246 +  p++;
   1.247 +
   1.248 +  while(*p && (*p == ' ' || *p == '\t')) p++;
   1.249 +  hdr->value = p;
   1.250 +
   1.251 +  for(i = 0; i < HEAD_NUM_IDS; i++){
   1.252 +    if(strcasecmp(header_names[i].header, buf) == 0)
   1.253 +      break;
   1.254 +  }
   1.255 +  hdr->id = (header_id)i;
   1.256 +  hdr->header = g_strdup(line);
   1.257 +  hdr->value = hdr->header + (hdr->value - line);
   1.258 +
   1.259 +  DEBUG(4) debugf("header: %d = %s", hdr->id, hdr->header);
   1.260 +
   1.261 +  return hdr;
   1.262 +}