Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/lib-mail/message-id.c @ 9261:51aee73e49a5 HEAD

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maildir: When UIDVALIDITY changes, don't reset uid_next to 1 in uidlist.
author Timo Sirainen <tss@iki.fi>
date Sun, 26 Jul 2009 23:36:12 -0400
parents 9d634c93d28a
children 00cd9aacd03c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
8590
b9faf4db2a9f Updated copyright notices to include year 2009.
Timo Sirainen <tss@iki.fi>
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1 /* Copyright (c) 2006-2009 Dovecot authors, see the included COPYING file */
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2
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3 #include "lib.h"
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4 #include "str.h"
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5 #include "rfc822-parser.h"
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6 #include "message-id.h"
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7
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8 static bool get_untokenized_msgid(const char **msgid_p, string_t *msgid)
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9 {
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10 struct rfc822_parser_context parser;
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11
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12 rfc822_parser_init(&parser, (const unsigned char *)*msgid_p,
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13 strlen(*msgid_p), NULL);
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14
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15 /*
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16 msg-id = [CFWS] "<" id-left "@" id-right ">" [CFWS]
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17 id-left = dot-atom-text / no-fold-quote / obs-id-left
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18 id-right = dot-atom-text / no-fold-literal / obs-id-right
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19 no-fold-quote = DQUOTE *(qtext / quoted-pair) DQUOTE
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20 no-fold-literal = "[" *(dtext / quoted-pair) "]"
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21 */
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22
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23 (void)rfc822_skip_lwsp(&parser);
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24
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25 if (rfc822_parse_dot_atom(&parser, msgid) <= 0)
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26 return FALSE;
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27
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28 if (*parser.data != '@')
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29 return FALSE;
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30 str_append_c(msgid, '@');
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31 parser.data++;
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32 (void)rfc822_skip_lwsp(&parser);
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33
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34 if (rfc822_parse_dot_atom(&parser, msgid) <= 0)
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35 return FALSE;
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36
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37 if (*parser.data != '>')
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38 return FALSE;
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39
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40 *msgid_p = (const char *)parser.data + 1;
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41 return TRUE;
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42 }
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43
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44 static void strip_lwsp(char *str)
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45 {
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46 /* @UNSAFE */
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47 char *dest;
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48
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49 /* find the first lwsp */
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50 while (*str != ' ' && *str != '\t' && *str != '\r' && *str != '\n') {
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51 if (*str == '\0')
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52 return;
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53 str++;
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54 }
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55
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56 for (dest = str; *str != '\0'; str++) {
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57 if (*str != ' ' && *str != '\t' && *str != '\r' && *str != '\n')
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58 *dest++ = *str;
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59 }
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60 *dest = '\0';
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61 }
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62
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63 const char *message_id_get_next(const char **msgid_p)
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64 {
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65 const char *msgid = *msgid_p;
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66 const char *p;
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67 string_t *str = NULL;
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68 bool found_at;
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69
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70 if (*msgid_p == NULL)
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71 return NULL;
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72
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73 for (;;) {
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74 /* skip until '<' */
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75 while (*msgid != '<') {
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76 if (*msgid == '\0') {
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77 *msgid_p = msgid;
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78 return NULL;
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79 }
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80 msgid++;
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81 }
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82 msgid++;
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83
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84 /* check it through quickly to see if it's already normalized */
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85 p = msgid; found_at = FALSE;
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86 for (;; p++) {
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87 if ((unsigned char)*p >= 'A') /* matches most */
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88 continue;
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89
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90 if (*p == '@')
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91 found_at = TRUE;
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92 if (*p == '>' || *p == '"' || *p == '(' || *p == '[')
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93 break;
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94
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95 if (*p == '\0') {
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96 *msgid_p = p;
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97 return NULL;
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98 }
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99 }
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100
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101 if (*p == '>') {
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102 *msgid_p = p+1;
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103 if (found_at) {
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104 char *s;
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105
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106 s = p_strdup_until(unsafe_data_stack_pool,
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107 msgid, p);
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108 strip_lwsp(s);
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109 return s;
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110 }
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111 } else {
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112 /* ok, do it the slow way */
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113 *msgid_p = msgid;
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114
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115 if (str == NULL) {
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116 /* allocate only once, so we don't leak
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117 with multiple invalid message IDs */
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118 str = t_str_new(256);
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119 }
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120 if (get_untokenized_msgid(msgid_p, str))
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121 return str_c(str);
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122 }
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123
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124 /* invalid message id, see if there's another valid one */
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125 msgid = *msgid_p;
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126 }
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127 }