+/*********************************************************************
+ *
+ * Function : compile_pattern
+ *
+ * Description : Compiles a host, domain or TAG pattern.
+ *
+ * Parameters :
+ * 1 : pattern = The pattern to compile.
+ * 2 : anchoring = How the regex should be anchored.
+ * Can be either one of NO_ANCHORING,
+ * LEFT_ANCHORED or RIGHT_ANCHORED.
+ * 3 : url = In case of failures, the spec member is
+ * logged and the structure freed.
+ * 4 : regex = Where the compiled regex should be stored.
+ *
+ * Returns : JB_ERR_OK - Success
+ * JB_ERR_MEMORY - Out of memory
+ * JB_ERR_PARSE - Cannot parse regex
+ *
+ *********************************************************************/
+static jb_err compile_pattern(const char *pattern, enum regex_anchoring anchoring,
+ struct url_spec *url, regex_t **regex)
+{
+ int errcode;
+ char rebuf[BUFFER_SIZE];
+ const char *fmt;
+
+ assert(pattern);
+ assert(strlen(pattern) < sizeof(rebuf) - 2);
+
+ if (pattern[0] == '\0')
+ {
+ *regex = NULL;
+ return JB_ERR_OK;
+ }
+
+ switch (anchoring)
+ {
+ case NO_ANCHORING:
+ fmt = "%s";
+ break;
+ case RIGHT_ANCHORED:
+ fmt = "%s$";
+ break;
+ case LEFT_ANCHORED:
+ fmt = "^%s";
+ break;
+ default:
+ log_error(LOG_LEVEL_FATAL,
+ "Invalid anchoring in compile_pattern %d", anchoring);
+ }
+
+ *regex = zalloc(sizeof(**regex));
+ if (NULL == *regex)
+ {
+ free_url_spec(url);
+ return JB_ERR_MEMORY;
+ }
+
+ snprintf(rebuf, sizeof(rebuf), fmt, pattern);
+
+ errcode = regcomp(*regex, rebuf, (REG_EXTENDED|REG_NOSUB|REG_ICASE));
+
+ if (errcode)
+ {
+ size_t errlen = regerror(errcode, *regex, rebuf, sizeof(rebuf));
+ if (errlen > (sizeof(rebuf) - (size_t)1))
+ {
+ errlen = sizeof(rebuf) - (size_t)1;
+ }
+ rebuf[errlen] = '\0';
+ log_error(LOG_LEVEL_ERROR, "error compiling %s from %s: %s",
+ pattern, url->spec, rebuf);
+ free_url_spec(url);
+
+ return JB_ERR_PARSE;
+ }
+
+ return JB_ERR_OK;
+
+}
+
+#ifdef FEATURE_EXTENDED_HOST_PATTERNS
+/*********************************************************************
+ *
+ * Function : compile_host_pattern
+ *
+ * Description : Parses and compiles a host pattern..
+ *
+ * Parameters :
+ * 1 : url = Target url_spec to be filled in.
+ * 2 : host_pattern = Host pattern to compile.
+ *
+ * Returns : JB_ERR_OK - Success
+ * JB_ERR_MEMORY - Out of memory
+ * JB_ERR_PARSE - Cannot parse regex
+ *
+ *********************************************************************/
+static jb_err compile_host_pattern(struct url_spec *url, const char *host_pattern)
+{
+ return compile_pattern(host_pattern, RIGHT_ANCHORED, url, &url->host_regex);
+}
+
+#else
+
+/*********************************************************************
+ *
+ * Function : compile_host_pattern
+ *
+ * Description : Parses and "compiles" an old-school host pattern.
+ *
+ * Parameters :
+ * 1 : url = Target url_spec to be filled in.
+ * 2 : host_pattern = Host pattern to parse.
+ *
+ * Returns : JB_ERR_OK - Success
+ * JB_ERR_MEMORY - Out of memory
+ * JB_ERR_PARSE - Cannot parse regex
+ *
+ *********************************************************************/
+static jb_err compile_host_pattern(struct url_spec *url, const char *host_pattern)
+{
+ char *v[150];
+ size_t size;
+ char *p;
+
+ /*
+ * Parse domain part
+ */
+ if (host_pattern[strlen(host_pattern) - 1] == '.')
+ {
+ url->unanchored |= ANCHOR_RIGHT;
+ }
+ if (host_pattern[0] == '.')
+ {
+ url->unanchored |= ANCHOR_LEFT;
+ }
+
+ /*
+ * Split domain into components
+ */
+ url->dbuffer = strdup(host_pattern);
+ if (NULL == url->dbuffer)
+ {
+ free_url_spec(url);
+ return JB_ERR_MEMORY;
+ }
+
+ /*
+ * Map to lower case
+ */
+ for (p = url->dbuffer; *p ; p++)
+ {
+ *p = (char)tolower((int)(unsigned char)*p);
+ }
+
+ /*
+ * Split the domain name into components
+ */
+ url->dcount = ssplit(url->dbuffer, ".", v, SZ(v), 1, 1);
+
+ if (url->dcount < 0)
+ {
+ free_url_spec(url);
+ return JB_ERR_MEMORY;
+ }
+ else if (url->dcount != 0)
+ {
+ /*
+ * Save a copy of the pointers in dvec
+ */
+ size = (size_t)url->dcount * sizeof(*url->dvec);
+
+ url->dvec = (char **)malloc(size);
+ if (NULL == url->dvec)
+ {
+ free_url_spec(url);
+ return JB_ERR_MEMORY;
+ }
+
+ memcpy(url->dvec, v, size);
+ }
+ /*
+ * else dcount == 0 in which case we needn't do anything,
+ * since dvec will never be accessed and the pattern will
+ * match all domains.
+ */
+ return JB_ERR_OK;
+}
+
+