Mercurial > masqmail

annotate src/header.c @ 326:45a64a875162 0.3.2

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Updated version
author meillo@marmaro.de
date Fri, 03 Jun 2011 12:09:09 +0200
parents 01d2f7a17bf0
children 41958685480d
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1 /* MasqMail
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2 Copyright (C) 2000 Oliver Kurth
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3
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4 This program is free software; you can redistribute it and/or modify
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 2 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software
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16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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17 */
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18 #include "masqmail.h"
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19
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20 header_name header_names[] = {
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21 {"From", HEAD_FROM,},
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22 {"Sender", HEAD_SENDER,},
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23 {"To", HEAD_TO,},
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24 {"Cc", HEAD_CC,},
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25 {"Bcc", HEAD_BCC,},
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26 {"Date", HEAD_DATE,},
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27 {"Message-Id", HEAD_MESSAGE_ID,},
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28 {"Reply-To", HEAD_REPLY_TO,},
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29 {"Subject", HEAD_SUBJECT,},
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30 {"Return-Path", HEAD_RETURN_PATH,},
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31 {"Envelope-To", HEAD_ENVELOPE_TO,},
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32 {"Received", HEAD_RECEIVED},
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33 };
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34
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35 /* this was borrowed from exim and slightly changed */
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36 gchar*
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37 rec_timestamp()
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38 {
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39 static gchar buf[64];
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40 int len;
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41
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42 time_t now = time(NULL);
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43 struct tm *t = localtime(&now);
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44
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45 int diff_hour, diff_min;
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46 struct tm local;
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47 struct tm *gmt;
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48
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49 memcpy(&local, t, sizeof(struct tm));
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50 gmt = gmtime(&now);
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51 diff_min = 60 * (local.tm_hour - gmt->tm_hour) + local.tm_min - gmt->tm_min;
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52 if (local.tm_year != gmt->tm_year) {
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53 diff_min += (local.tm_year > gmt->tm_year) ? 1440 : -1440;
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54 } else if (local.tm_yday != gmt->tm_yday) {
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55 diff_min += (local.tm_yday > gmt->tm_yday) ? 1440 : -1440;
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56 }
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57 diff_hour = diff_min / 60;
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58 diff_min = abs(diff_min - diff_hour * 60);
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59
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60 len = strftime(buf, sizeof(buf), "%a, ", &local);
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61 g_snprintf(buf + len, sizeof(buf) - len, "%02d ", local.tm_mday);
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62 len += strlen(buf + len);
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63 len += strftime(buf + len, sizeof(buf) - len, "%b %Y %H:%M:%S", &local);
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64 g_snprintf(buf + len, sizeof(buf) - len, " %+03d%02d", diff_hour, diff_min);
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65
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66 return buf;
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67 }
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68
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69 /* finds list of headers matching id
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70 if id == HEAD_UNKNOWN and header == NULL finds all unknown headers
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71 else finds all headers matching header
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72 */
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73 GList*
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74 find_header(GList * hdr_list, header_id id, gchar * hdr_str)
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75 {
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76 GList *found_list = NULL;
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77 GList *node;
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78
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79 if ((id != HEAD_UNKNOWN) || !hdr_str) {
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80 foreach(hdr_list, node) {
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81 header *hdr = (header *) (node->data);
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82 if (hdr->id == id) {
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83 found_list = g_list_append(found_list, hdr);
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84 }
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85 }
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86 return found_list;
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87 }
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88
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89 foreach(hdr_list, node) {
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90 header *hdr = (header *) (node->data);
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91 gchar buf[64], *q = buf, *p = hdr->header;
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92
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93 while (*p != ':' && q < buf+sizeof(buf)-1 && *p) {
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94 *(q++) = *(p++);
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95 }
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96 *q = '\0';
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97
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98 if (strcasecmp(buf, hdr_str) == 0) {
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99 found_list = g_list_append(found_list, hdr);
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100 }
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101 }
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102 return found_list;
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103 }
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104
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105 void
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106 header_unfold(header * hdr)
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107 {
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108 char *src = hdr->header;
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109 char *dest = src;
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110 char *p;
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111
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112 p = strchr(src, '\n');
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113 if (!p || !p[1]) {
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114 /* no folded header */
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115 return;
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116 }
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117
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118 while (*src) {
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119 if (*src == '\n') {
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120 /* ignore */
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121 src++;
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122 } else {
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123 /* copy */
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124 *(dest++) = *(src++);
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125 }
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126 }
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127 *(dest++) = '\n';
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128 *(dest++) = '\0';
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129 }
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130
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131 /*
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132 fold the header at maxlen chars (newline excluded)
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133 (We exclude the newline because the RFCs deal with it this way)
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134 */
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135 void
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136 header_fold(header* hdr, unsigned int maxlen)
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137 {
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138 int len = strlen(hdr->header);
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139 char* src = hdr->header;
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140 char* dest;
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141 char* tmp;
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142 char* p;
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143 int valueoffset;
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144
303
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145 if (len <= maxlen) {
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146 /* we don't need to do anything */
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147 return;
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148 }
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149
303
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150 /* strip trailing whitespace */
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151 for (p=src+len-1; *p==' '||*p=='\t'||*p=='\n'; p--) {
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152 *p = '\0';
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153 len--;
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154 printf(" trailing whitespace\n");
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155 }
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156 printf("stripped len: %d\n", len);
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157
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158 /* FIXME: would be nice to have a better size calculation */
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159 /* (the current size + what we insert as break, twice as often as
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160 we have breaks in the optimal case) */
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161 tmp = malloc(len + 2 * (len/maxlen) * strlen("\n\t"));
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162 dest = tmp;
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163
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164 /* the position in hdr->header where the value part start */
301
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165 valueoffset = hdr->value - hdr->header;
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166
303
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167 while (strlen(src) > maxlen) {
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168 int i, l;
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169 char *pp;
0
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170
303
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171 for (pp=src+maxlen; pp>src; pp--) {
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172 if (*pp==' ' || *pp=='\t' || *p=='\n') {
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173 break;
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174 }
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175 }
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176
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177 if (src == pp) {
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178 /* no potential break point was found within
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179 maxlen so advance further until the next */
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180 for (pp=src+maxlen; *pp; pp++) {
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181 if (*pp==' ' || *pp=='\t' || *p=='\n') {
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182 break;
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183 }
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184 }
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185 }
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186 if (!*pp) {
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187 break;
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188 }
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189
303
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190 memcpy(dest, src, pp-src);
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191 dest += pp-src;
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192 *(dest++) = '\n';
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193 *(dest++) = '\t';
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194 while (*pp == ' ' || *pp == '\t' || *p=='\n') {
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195 pp++;
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196 }
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197 src = pp;
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198 }
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199 memcpy(dest, src, strlen(src));
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200 dest += strlen(src);
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201
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202 if (*(dest-1) != '\n') {
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203 *dest = '\n';
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204 *(dest+1) = '\0';
301
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205 }
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206
303
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207 hdr->header = tmp;
301
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208 hdr->value = hdr->header + valueoffset;
0
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209 }
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210
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211 header*
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212 create_header(header_id id, gchar * fmt, ...)
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213 {
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214 gchar *p;
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215 header *hdr;
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216 va_list args;
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217 va_start(args, fmt);
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218
301
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219 /* g_malloc() calls exit on failure */
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220 hdr = g_malloc(sizeof(header));
0
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221
301
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222 hdr->id = id;
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223 hdr->header = g_strdup_vprintf(fmt, args);
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224 hdr->value = NULL;
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225
301
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226 /* value shall point to the first non-whitespace char in the
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227 value part of the header line (i.e. after the first colon) */
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228 p = strchr(hdr->header, ':');
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229 if (p) {
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230 p++;
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231 while (*p == ' ' || *p == '\t' || *p == '\n') {
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232 p++;
301
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233 }
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234 hdr->value = (*p) ? p : NULL;
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235 }
0
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236
301
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237 DEBUG(3) debugf("create_header(): hdr: `%s'\n", hdr->header);
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238 DEBUG(3) debugf("create_header(): val: `%s'\n", hdr->value);
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239
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240 va_end(args);
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241 return hdr;
0
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242 }
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243
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244 void
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245 destroy_header(header * hdr)
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246 {
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247 if (hdr) {
301
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248 if (hdr->header) {
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249 g_free(hdr->header);
301
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250 }
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251 g_free(hdr);
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252 }
0
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253 }
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254
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255 header*
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256 copy_header(header * hdr)
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257 {
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258 header *new_hdr = NULL;
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259
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260 if (hdr) {
301
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261 new_hdr = g_malloc(sizeof(header));
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262 new_hdr->id = hdr->id;
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263 new_hdr->header = g_strdup(hdr->header);
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264 new_hdr->value = new_hdr->header + (hdr->value - hdr->header);
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265 }
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266 return new_hdr;
0
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267 }
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268
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269 header*
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270 get_header(gchar * line)
0
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271 {
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272 gchar *p = line;
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273 gchar buf[64], *q = buf;
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274 gint i;
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275 header *hdr;
0
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276
301
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277 while (*p && (*p != ':') && (q < buf+sizeof(buf)-1)) {
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278 *(q++) = *(p++);
301
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279 }
15
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280 *q = '\0';
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281
301
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282 if (*p != ':') {
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283 return NULL;
301
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284 }
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285
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286 hdr = g_malloc(sizeof(header));
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287
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288 hdr->value = NULL;
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289 p++;
0
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290
301
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291 while (*p && (*p == ' ' || *p == '\t')) {
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292 p++;
301
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293 }
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294 hdr->value = p;
301
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295 /* Note: an empty value can also mean that it's only the first part
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296 of a folded header line */
0
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297
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298 for (i = 0; i < HEAD_NUM_IDS; i++) {
301
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299 if (strcasecmp(header_names[i].header, buf) == 0) {
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300 break;
301
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301 }
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302 }
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303 hdr->id = (header_id) i;
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304 hdr->header = g_strdup(line);
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305 hdr->value = hdr->header + (hdr->value - line);
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306
322
01d2f7a17bf0 hinted that the debug output of folded headers prints only the
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307 DEBUG(4) debugf("header: %d = %s[...]", hdr->id, hdr->header);
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308 /* Note: This only outputs the first line if the header is folded */
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309
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310 return hdr;
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311 }