--- a/mcabber/src/utils.c Mon Sep 26 00:27:56 2005 +0200
+++ b/mcabber/src/utils.c Mon Sep 26 22:08:48 2005 +0200
@@ -29,6 +29,7 @@
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <ctype.h>
#include <config.h>
#include "logprint.h"
@@ -248,3 +249,73 @@
req.tv_nsec = (long)usec * 1000L;
nanosleep(&req, NULL);
}
+
+/**
+ * Derived from libjabber/jid.c, because the libjabber version is not
+ * really convenient for our usage.
+ *
+ * Check if the full JID is valid
+ * Return 0 if it is valid, non zero otherwise
+ */
+int check_jid_syntax(char *jid)
+{
+ char *str;
+ char *domain, *resource;
+ int domlen;
+
+ if (!jid) return 1;
+
+ domain = strchr(jid, '@');
+ if (!domain) return 1;
+
+ /* node identifiers may not be longer than 1023 bytes */
+ if ((domain == jid) || (domain-jid > 1023))
+ return 1;
+ domain++;
+
+ /* check for low and invalid ascii characters in the username */
+ for (str = jid; *str != '@'; str++) {
+ if (*str <= 32 || *str == ':' || *str == '@' ||
+ *str == '<' || *str == '>' || *str == '\'' ||
+ *str == '"' || *str == '&') {
+ return 1;
+ }
+ }
+
+ /* the username is okay as far as we can tell without LIBIDN */
+
+ resource = strchr(domain, '/');
+
+ /* the resource is optional */
+ if (resource) {
+ domlen = resource - domain;
+ resource++;
+ /* resources may not be longer than 1023 bytes */
+ if ((*resource == '\0') || strlen(resource) > 1023)
+ return 1;
+ } else {
+ domlen = strlen(domain);
+ }
+
+ /* there must be a domain identifier */
+ if (domlen == 0) return 1;
+
+ /* and it must not be longer than 1023 bytes */
+ if (domlen > 1023) return 1;
+
+ /* make sure the hostname is valid characters */
+ for (str = domain; *str != '\0' && *str != '/'; str++) {
+ if (!(isalnum(*str) || *str == '.' || *str == '-' || *str == '_'))
+ return 1;
+ }
+
+ /* it's okay as far as we can tell without LIBIDN */
+ return 0;
+}
+
+void mc_strtolower(char *str)
+{
+ if (!str) return;
+ for ( ; *str; str++)
+ *str = tolower(*str);
+}