1 #ifndef SMTP_PARSER_H
2 #define SMTP_PARSER_H
3
4 /*
5 * Character definitions
6 */
7
8 extern const uint16_t smtp_xtext_char_mask;
9 extern const uint16_t smtp_atext_char_mask;
10 extern const uint16_t smtp_dcontent_char_mask;
11 extern const uint16_t smtp_qtext_char_mask;
12 extern const uint16_t smtp_textstr_char_mask;
13 extern const uint16_t smtp_esmtp_value_char_mask;
14 extern const uint16_t smtp_ehlo_param_char_mask;
15 extern const uint16_t smtp_ehlo_greet_char_mask;
16 extern const uint16_t smtp_qpair_char_mask;
17
18 extern const uint16_t smtp_char_lookup[256];
19
20 static inline bool
smtp_char_is_xtext(unsigned char ch)21 smtp_char_is_xtext(unsigned char ch) {
22 return (smtp_char_lookup[ch] & smtp_xtext_char_mask) != 0;
23 }
24 static inline bool
smtp_char_is_atext(unsigned char ch)25 smtp_char_is_atext(unsigned char ch) {
26 return (smtp_char_lookup[ch] & smtp_atext_char_mask) != 0;
27 }
28 static inline bool
smtp_char_is_dcontent(unsigned char ch)29 smtp_char_is_dcontent(unsigned char ch) {
30 return (smtp_char_lookup[ch] & smtp_dcontent_char_mask) != 0;
31 }
32 static inline bool
smtp_char_is_qtext(unsigned char ch)33 smtp_char_is_qtext(unsigned char ch) {
34 return (smtp_char_lookup[ch] & smtp_qtext_char_mask) != 0;
35 }
36 static inline bool
smtp_char_is_textstr(unsigned char ch)37 smtp_char_is_textstr(unsigned char ch) {
38 return (smtp_char_lookup[ch] & smtp_textstr_char_mask) != 0;
39 }
40 static inline bool
smtp_char_is_esmtp_value(unsigned char ch)41 smtp_char_is_esmtp_value(unsigned char ch) {
42 return (smtp_char_lookup[ch] & smtp_esmtp_value_char_mask) != 0;
43 }
44 static inline bool
smtp_char_is_ehlo_param(unsigned char ch)45 smtp_char_is_ehlo_param(unsigned char ch) {
46 return (smtp_char_lookup[ch] & smtp_ehlo_param_char_mask) != 0;
47 }
48 static inline bool
smtp_char_is_ehlo_greet(unsigned char ch)49 smtp_char_is_ehlo_greet(unsigned char ch) {
50 return (smtp_char_lookup[ch] & smtp_ehlo_greet_char_mask) != 0;
51 }
52 static inline bool
smtp_char_is_qpair(unsigned char ch)53 smtp_char_is_qpair(unsigned char ch) {
54 return (smtp_char_lookup[ch] & smtp_qpair_char_mask) != 0;
55 }
56
57 /*
58 * SMTP parser
59 */
60
61 struct smtp_parser {
62 pool_t pool;
63 const char *error;
64
65 const unsigned char *begin, *cur, *end;
66 };
67
68 void smtp_parser_init(struct smtp_parser *parser,
69 pool_t pool, const char *data);
70 string_t *smtp_parser_get_tmpbuf(struct smtp_parser *parser, size_t size);
71
72 /*
73 * Common syntax
74 */
75
76 int smtp_parser_parse_domain(struct smtp_parser *parser,
77 const char **value_r);
78 int smtp_parser_parse_address_literal(struct smtp_parser *parser,
79 const char **value_r, struct ip_addr *ip_r);
80 int smtp_parser_parse_atom(struct smtp_parser *parser,
81 const char **value_r);
82 int smtp_parser_parse_quoted_string(struct smtp_parser *parser,
83 const char **value_r);
84 int smtp_parser_parse_string(struct smtp_parser *parser,
85 const char **value_r);
86 int smtp_parser_parse_xtext(struct smtp_parser *parser,
87 string_t *out);
88
89 #endif
90