ppp: introduced 'mppe' option

3 files changed, 41 insertions, 2 deletions

diff --git a/accel-pppd/accel-ppp.conf b/accel-pppd/accel-ppp.conf
index a549a55..ecef507 100644
--- a/accel-pppd/accel-ppp.conf
+++ b/accel-pppd/accel-ppp.conf
@@ -30,6 +30,7 @@ mru=1400
 #sid-case=upper
 #check-ip=0
 #single-session=replace
+#mppe=require
 
 [lcp]
 echo-interval=30
diff --git a/accel-pppd/accel-ppp.conf.5 b/accel-pppd/accel-ppp.conf.5
index 0180f5e..dc6ff97 100644
--- a/accel-pppd/accel-ppp.conf.5
+++ b/accel-pppd/accel-ppp.conf.5
@@ -115,6 +115,19 @@ If this option is
 .B deny
 then accel-ppp will deny second session authorization.
 .TP
+.BI "mppe=" allow|prefere|require
+Specifies mppe negotioation preference.
+.br
+.B allow
+- allow mppe negotiation if client requests it.
+.br
+.B prefere
+- ask client for mppe, if it rejects don't fail.
+.br
+.B require
+- ask client for mppe, if it rejects drop connection
+Please note that RADIUS may override this option by MS-MPPE-Encryption-Policy.
+.TP
 .SH [lcp]
 .br
 PPP LCP module configuration
diff --git a/accel-pppd/ppp/ccp_mppe.c b/accel-pppd/ppp/ccp_mppe.c
index 0952aa0..436f710 100644
--- a/accel-pppd/ppp/ccp_mppe.c
+++ b/accel-pppd/ppp/ccp_mppe.c
@@ -29,6 +29,8 @@ static int mppe_recv_conf_nak(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, u
 static int mppe_recv_conf_rej(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, uint8_t *ptr);
 static void mppe_print(void (*print)(const char *fmt,...),struct ccp_option_t*, uint8_t *ptr);
 
+static int conf_mppe = -1;
+
 struct mppe_option_t
 {
 	struct ccp_option_t opt;
@@ -53,7 +55,11 @@ static struct ccp_option_t *mppe_init(struct ppp_ccp_t *ccp)
 {
 	struct mppe_option_t *mppe_opt = _malloc(sizeof(*mppe_opt));
 	memset(mppe_opt, 0, sizeof(*mppe_opt));
-	mppe_opt->mppe = -1;
+	mppe_opt->policy = conf_mppe;
+	if (conf_mppe)
+		mppe_opt->mppe = conf_mppe;
+	else
+		mppe_opt->mppe = -1;
 	mppe_opt->opt.id = CI_MPPE;
 	mppe_opt->opt.len = 6;
 
@@ -245,15 +251,34 @@ static void ev_mppe_keys(struct ev_mppe_keys_t *ev)
 	
 	memcpy(mppe_opt->recv_key, ev->recv_key, 16);
 	memcpy(mppe_opt->send_key, ev->send_key, 16);
-	mppe_opt->policy = ev->policy;
+	//mppe_opt->policy = ev->policy;
 
 	if (ev->policy == 2)
 		mppe_opt->mppe = 1;
 }
 
+static void load_config(void)
+{
+	const char *opt;
+
+	opt = conf_get_opt("ppp", "mppe");
+	if (opt) {
+		if (!strcmp(opt,"require"))
+			conf_mppe = 2;
+		else if (!strcmp(opt,"prefere"))
+			conf_mppe = 1;
+		else if (!strcmp(opt,"deny"))
+			conf_mppe = 0;
+	} else
+		conf_mppe = -1;
+}
+
 static void __init mppe_opt_init()
 {
 	ccp_option_register(&mppe_opt_hnd);
 	triton_event_register_handler(EV_MPPE_KEYS, (triton_event_func)ev_mppe_keys);
+	
+	load_config();
+	triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config);
 }