Check for vendor code before trying to interpret RADIUS attributes.

[ppp.git] / PLUGINS

diff --git a/PLUGINS b/PLUGINS
index 2cbb427a5c1031b320fef790f451c1497fd68691..e3e6718cb0669ee9e92c1f37c001d3007456cb24 100644 (file)
--- a/PLUGINS
+++ b/PLUGINS
@@ -147,6 +147,42 @@ pppd's internal `plogout' function.  It can be used for accounting
 purposes.  This hook is deprecated and will be replaced by a notifier.
 
 
+int (*chap_check_hook)(void);
+int (*chap_passwd_hook)(char *user, char *passwd);
+int (*chap_auth_hook)(char *user, u_char *remmd,
+                    int remmd_len, chap_state *cstate);
+
+These hooks are designed to allow a plugin to replace the normal CHAP
+password processing in pppd with something different (e.g. contacting
+an external server).
+
+The chap_check_hook is called to check whether there is any possibility
+that the peer could authenticate itself to us.  If it returns 1, pppd
+will ask the peer to authenticate itself.  If it returns 0, pppd will
+not ask the peer to authenticate itself (but if authentication is
+required, pppd may exit, or terminate the link before network protocol
+negotiation).  If it returns -1, pppd will look in the chap-secrets
+file as it would normally.
+
+The chap_passwd_hook is called to determine what password
+pppd should use in authenticating itself to the peer with CHAP.  The
+user string will already be initialized, by the `user' option, the
+`name' option, or from the hostname, but can be changed if necessary.
+This hook is called only if pppd is a client, not if it is a server.
+
+MAXSECRETLEN bytes of space are available at *passwd.  If this hook
+returns 0, pppd will use the value *passwd; if it returns -1, pppd
+will fail to authenticate.
+
+The chap_auth_hook is called to determine whether the response
+to a CHAP challenge provided by the peer is valid.  user points to
+a null-terminated string containing the username supplied
+by the peer.  remmd points to the response provided by the peer, of
+length remmd_len bytes.  cstate is the internal CHAP state structure
+maintained by pppd.  chap_auth_hook is expected to return one of
+CHAP_SUCCESS or CHAP_FAILURE.
+
+
 int (*null_auth_hook)(struct wordlist **paddrs,
                      struct wordlist **popts);
 
@@ -167,6 +203,22 @@ should be stored in *addrp.  If nothing is stored in *addrp, pppd will
 determine the peer's address in the usual manner.
 
 
+int (*allowed_address_hook)(u_int32_t addr)
+
+This hook is called to see if a peer is allowed to use the specified
+address.  If the hook returns 1, the address is accepted.  If it returns
+0, the address is rejected.  If it returns -1, the address is verified
+in the normal away against the appropriate options and secrets files.
+
+
+void (*snoop_recv_hook)(unsigned char *p, int len)
+void (*snoop_send_hook)(unsigned char *p, int len)
+
+These hooks are called whenever pppd receives or sends a packet.  The
+packet is in p; its length is len.  This allows plugins to "snoop in"
+on the pppd conversation.  The hooks may prove useful in implmenting
+L2TP.
+
 A plugin registers itself with a notifier by declaring a procedure of
 the form:
 
@@ -213,4 +265,4 @@ Here is a list of the currently-implemented notifiers in pppd.
 
 
 
-## $Id: PLUGINS,v 1.3 2001/05/21 08:34:33 paulus Exp $ ##
+## $Id: PLUGINS,v 1.5 2002/02/12 20:07:09 dfs Exp $ ##