postlicyd/query.c

   1 /******************************************************************************/
   2 /*          pfixtools: a collection of postfix related tools                  */
   3 /*          ~~~~~~~~~                                                         */
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  15 /*  3. The names of its contributors may not be used to endorse or promote    */
  16 /*     products derived from this software without specific prior written     */
  17 /*     permission.                                                            */
  18 /*                                                                            */
  19 /*  THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND   */
  20 /*  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE     */
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  29 /*  THE POSSIBILITY OF SUCH DAMAGE.                                           */
  30 /******************************************************************************/
  31
  32 /*
  33  * Copyright © 2007 Pierre Habouzit
  34  * Copyright © 2008 Florent Bruneau
  35  */
  36
  37 #include "query.h"
  38 #include "policy_tokens.h"
  39
  40 bool query_parse(query_t *query, char *p)
  41 {
  42 #define PARSE_CHECK(expr, error, ...)                                        \
  43     do {                                                                     \
  44         if (!(expr)) {                                                       \
  45             err(error, ##__VA_ARGS__);                                       \
  46             return false;                                                    \
  47         }                                                                    \
  48     } while (0)
  49
  50     p_clear(query, 1);
  51     query->state = SMTP_UNKNOWN;
  52     while (*p != '\n') {
  53         char *k, *v;
  54         int klen, vlen, vtk;
  55
  56         while (isblank(*p))
  57             p++;
  58         p = strchr(k = p, '=');
  59         PARSE_CHECK(p, "could not find '=' in line");
  60         for (klen = p - k; klen && isblank(k[klen]); klen--);
  61         p += 1; /* skip = */
  62
  63         while (isblank(*p))
  64             p++;
  65         p = strchr(v = p, '\n');
  66         PARSE_CHECK(p, "could not find final \\n in line");
  67         for (vlen = p - v; vlen && isblank(v[vlen]); vlen--);
  68         p += 1; /* skip \n */
  69
  70         vtk = policy_tokenize(v, vlen);
  71         switch (policy_tokenize(k, klen)) {
  72 #define CASE(up, low)  case PTK_##up: query->low = v; v[vlen] = '\0';  break;
  73             CASE(HELO_NAME,           helo_name);
  74             CASE(QUEUE_ID,            queue_id);
  75             CASE(SENDER,              sender);
  76             CASE(RECIPIENT,           recipient);
  77             CASE(RECIPIENT_COUNT,     recipient_count);
  78             CASE(CLIENT_ADDRESS,      client_address);
  79             CASE(CLIENT_NAME,         client_name);
  80             CASE(REVERSE_CLIENT_NAME, reverse_client_name);
  81             CASE(INSTANCE,            instance);
  82             CASE(SASL_METHOD,         sasl_method);
  83             CASE(SASL_USERNAME,       sasl_username);
  84             CASE(SASL_SENDER,         sasl_sender);
  85             CASE(SIZE,                size);
  86             CASE(CCERT_SUBJECT,       ccert_subject);
  87             CASE(CCERT_ISSUER,        ccert_issuer);
  88             CASE(CCERT_FINGERPRINT,   ccert_fingerprint);
  89             CASE(ENCRYPTION_PROTOCOL, encryption_protocol);
  90             CASE(ENCRYPTION_CIPHER,   encryption_cipher);
  91             CASE(ENCRYPTION_KEYSIZE,  encryption_keysize);
  92             CASE(ETRN_DOMAIN,         etrn_domain);
  93             CASE(STRESS,              stress);
  94 #undef CASE
  95
  96           case PTK_REQUEST:
  97             PARSE_CHECK(vtk == PTK_SMTPD_ACCESS_POLICY,
  98                         "unexpected `request' value: %.*s", vlen, v);
  99             break;
 100
 101           case PTK_PROTOCOL_NAME:
 102             PARSE_CHECK(vtk == PTK_SMTP || vtk == PTK_ESMTP,
 103                         "unexpected `protocol_name' value: %.*s", vlen, v);
 104             query->esmtp = vtk == PTK_ESMTP;
 105             break;
 106
 107           case PTK_PROTOCOL_STATE:
 108             switch (vtk) {
 109 #define CASE(name)  case PTK_##name: query->state = SMTP_##name; break;
 110                 CASE(CONNECT);
 111                 CASE(EHLO);
 112                 CASE(HELO);
 113                 CASE(MAIL);
 114                 CASE(RCPT);
 115                 CASE(DATA);
 116                 CASE(END_OF_MESSAGE);
 117                 CASE(VRFY);
 118                 CASE(ETRN);
 119               default:
 120                 PARSE_CHECK(false, "unexpected `protocol_state` value: %.*s",
 121                             vlen, v);
 122 #undef CASE
 123             }
 124             break;
 125
 126           default:
 127             warn("unexpected key, skipped: %.*s", klen, k);
 128             continue;
 129         }
 130     }
 131
 132     return query->state != SMTP_UNKNOWN;
 133 #undef PARSE_CHECK
 134 }
 135