| 1 | #include "hfield.h" |
| 2 | |
| 3 | static char *(hname[]) = { |
| 4 | "unknown-header" |
| 5 | , "sender" |
| 6 | , "from" |
| 7 | , "reply-to" |
| 8 | , "to" |
| 9 | , "cc" |
| 10 | , "bcc" |
| 11 | , "date" |
| 12 | , "message-id" |
| 13 | , "subject" |
| 14 | , "resent-sender" |
| 15 | , "resent-from" |
| 16 | , "resent-reply-to" |
| 17 | , "resent-to" |
| 18 | , "resent-cc" |
| 19 | , "resent-bcc" |
| 20 | , "resent-date" |
| 21 | , "resent-message-id" |
| 22 | , "return-receipt-to" |
| 23 | , "errors-to" |
| 24 | , "apparently-to" |
| 25 | , "received" |
| 26 | , "return-path" |
| 27 | , "delivered-to" |
| 28 | , "content-length" |
| 29 | , "content-type" |
| 30 | , "content-transfer-encoding" |
| 31 | , "notice-requested-upon-delivery-to" |
| 32 | , "mail-followup-to" |
| 33 | , 0 |
| 34 | }; |
| 35 | |
| 36 | static int hmatch(s,len,t) |
| 37 | char *s; |
| 38 | int len; |
| 39 | char *t; |
| 40 | { |
| 41 | int i; |
| 42 | char ch; |
| 43 | |
| 44 | for (i = 0;ch = t[i];++i) |
| 45 | { |
| 46 | if (i >= len) return 0; |
| 47 | if (ch != s[i]) |
| 48 | { |
| 49 | if (ch == '-') return 0; |
| 50 | if (ch - 32 != s[i]) return 0; |
| 51 | } |
| 52 | } |
| 53 | for (;;) |
| 54 | { |
| 55 | if (i >= len) return 0; |
| 56 | ch = s[i]; |
| 57 | if (ch == ':') return 1; |
| 58 | if ((ch != ' ') && (ch != '\t')) return 0; |
| 59 | ++i; |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | int hfield_known(s,len) |
| 64 | char *s; |
| 65 | int len; |
| 66 | { |
| 67 | int i; |
| 68 | char *t; |
| 69 | |
| 70 | for (i = 1;t = hname[i];++i) |
| 71 | if (hmatch(s,len,t)) |
| 72 | return i; |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | int hfield_valid(s,len) |
| 77 | char *s; |
| 78 | int len; |
| 79 | { |
| 80 | int i; |
| 81 | int j; |
| 82 | char ch; |
| 83 | |
| 84 | for (j = 0;j < len;++j) |
| 85 | if (s[j] == ':') |
| 86 | break; |
| 87 | if (j >= len) return 0; |
| 88 | while (j) |
| 89 | { |
| 90 | ch = s[j - 1]; |
| 91 | if ((ch != ' ') && (ch != '\t')) |
| 92 | break; |
| 93 | --j; |
| 94 | } |
| 95 | if (!j) return 0; |
| 96 | |
| 97 | for (i = 0;i < j;++i) |
| 98 | { |
| 99 | ch = s[i]; |
| 100 | if (ch <= 32) return 0; |
| 101 | if (ch >= 127) return 0; |
| 102 | } |
| 103 | return 1; |
| 104 | } |
| 105 | |
| 106 | unsigned int hfield_skipname(s,len) |
| 107 | char *s; |
| 108 | int len; |
| 109 | { |
| 110 | int i; |
| 111 | char ch; |
| 112 | |
| 113 | for (i = 0;i < len;++i) |
| 114 | if (s[i] == ':') |
| 115 | break; |
| 116 | if (i < len) ++i; |
| 117 | while (i < len) |
| 118 | { |
| 119 | ch = s[i]; |
| 120 | if ((ch != '\t') && (ch != '\n') && (ch != '\r') && (ch != ' ')) |
| 121 | break; |
| 122 | ++i; |
| 123 | } |
| 124 | return i; |
| 125 | } |