pppd: Add option to strip MS domain name (#188)

Some Windows 9x/ME clients might be erroneously transmitting the MS domain
along the login name. This allows to strip them on the server side.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Co-authored-by: Marco d'Itri <md@linux.it>

diff --git a/pppd/chap-new.c b/pppd/chap-new.c
index 0b1bb86e77c0d35a03b6e58629ace81748ec36e5..fab82800a7b33950935c8b13a1be41a0982b45dd 100644 (file)
--- a/pppd/chap-new.c
+++ b/pppd/chap-new.c
@@ -59,6 +59,7 @@ int chap_server_timeout_time = 3;
 int chap_max_transmits = 10;
 int chap_rechallenge_time = 0;
 int chap_client_timeout_time = 60;
+int chapms_strip_domain = 0;
 
 /*
  * Command-line options.
@@ -72,6 +73,8 @@ static option_t chap_option_list[] = {
          "Set interval for rechallenge", OPT_PRIO },
        { "chap-timeout", o_int, &chap_client_timeout_time,
          "Set timeout for CHAP (as client)", OPT_PRIO },
+       { "chapms-strip-domain", o_bool, &chapms_strip_domain,
+         "Strip the domain prefix before the Username", 1 },
        { NULL }
 };
 
@@ -355,6 +358,14 @@ chap_handle_response(struct chap_server_state *ss, int id,
                        /* Null terminate and clean remote name. */
                        slprintf(rname, sizeof(rname), "%.*v", len, name);
                        name = rname;
+
+                       /* strip the MS domain name */
+                       if (chapms_strip_domain && strrchr(rname, '\\')) {
+                               char tmp[MAXNAMELEN+1];
+
+                               strcpy(tmp, strrchr(rname, '\\') + 1);
+                               strcpy(rname, tmp);
+                       }
                }
 
                if (chap_verify_hook)