From 5c0cac0eeecc32e5023d353a8420633827800e8e Mon Sep 17 00:00:00 2001
From: Benjamin Cama <benoar@dolka.fr>
Date: Sun, 11 Oct 2015 18:08:11 +0200
Subject: [PATCH] Handle IPv6 RADIUS attributes

---
 pppd/plugins/radius/avpair.c       | 26 +++++++++++++++++++++++++-
 pppd/plugins/radius/dict.c         | 12 ++++++++++++
 pppd/plugins/radius/radiusclient.h | 11 +++++++++++
 3 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/pppd/plugins/radius/avpair.c b/pppd/plugins/radius/avpair.c
index 716d23f..7536941 100644
--- a/pppd/plugins/radius/avpair.c
+++ b/pppd/plugins/radius/avpair.c
@@ -222,6 +222,9 @@ VALUE_PAIR *rc_avpair_gen (AUTH_HDR *auth)
                        {

                            case PW_TYPE_STRING:
+                           case PW_TYPE_IFID:
+                           case PW_TYPE_IPV6ADDR:
+                           case PW_TYPE_IPV6PREFIX:
                                memcpy (pair->strvalue, (char *) ptr, (size_t) attrlen);
                                pair->strvalue[attrlen] = '\0';
                                pair->lvalue = attrlen;
@@ -692,9 +695,10 @@ int rc_avpair_parse (char *buffer, VALUE_PAIR **first_pair)
 int rc_avpair_tostr (VALUE_PAIR *pair, char *name, int ln, char *value, int lv)
 {
        DICT_VALUE     *dval;
-       char            buffer[32];
+       char            buffer[INET6_ADDRSTRLEN + 4]; // for a prefix: addr + '/' + prefixlen
        struct in_addr  inad;
        unsigned char         *ptr;
+       char            *str;

        *name = *value = '\0';

@@ -753,6 +757,26 @@ int rc_avpair_tostr (VALUE_PAIR *pair, char *name, int ln, char *value, int lv)
                strncpy(value, buffer, lv-1);
                break;

+           case PW_TYPE_IFID:
+               ptr = pair->strvalue;
+               snprintf(buffer, sizeof (buffer), "%x:%x:%x:%x",
+                        (ptr[0] << 8) + ptr[1], (ptr[2] << 8) + ptr[3],
+                        (ptr[4] << 8) + ptr[5], (ptr[6] << 8) + ptr[7]);
+               strncpy(value, buffer, lv-1);
+               break;
+
+           case PW_TYPE_IPV6ADDR:
+               inet_ntop(AF_INET6, pair->strvalue, buffer, sizeof (buffer));
+               strncpy(value, buffer, lv-1);
+               break;
+
+           case PW_TYPE_IPV6PREFIX:
+               inet_ntop(AF_INET6, pair->strvalue + 2, buffer, sizeof (buffer));
+               str = buffer + strlen(buffer);
+               snprintf(str, sizeof (buffer) - (str - buffer), "/%d", *(pair->strvalue + 1));
+               strncpy(value, buffer, lv-1);
+               break;
+
            default:
                error("rc_avpair_tostr: unknown attribute type %d", pair->type);
                return (-1);
diff --git a/pppd/plugins/radius/dict.c b/pppd/plugins/radius/dict.c
index 72b3e70..3b2add2 100644
--- a/pppd/plugins/radius/dict.c
+++ b/pppd/plugins/radius/dict.c
@@ -158,6 +158,18 @@ int rc_read_dictionary (char *filename)
                        {
                                type = PW_TYPE_DATE;
                        }
+                       else if (strcmp (typestr, "ifid") == 0)
+                       {
+                               type = PW_TYPE_IFID;
+                       }
+                       else if (strcmp (typestr, "ipv6addr") == 0)
+                       {
+                               type = PW_TYPE_IPV6ADDR;
+                       }
+                       else if (strcmp (typestr, "ipv6prefix") == 0)
+                       {
+                               type = PW_TYPE_IPV6PREFIX;
+                       }
                        else
                        {
                                error("rc_read_dictionary: invalid type on line %d of dictionary %s",
diff --git a/pppd/plugins/radius/radiusclient.h b/pppd/plugins/radius/radiusclient.h
index 51b959a..ab4ef2d 100644
--- a/pppd/plugins/radius/radiusclient.h
+++ b/pppd/plugins/radius/radiusclient.h
@@ -77,6 +77,17 @@ typedef struct pw_auth_hdr
 #define PW_TYPE_INTEGER                        1
 #define PW_TYPE_IPADDR                 2
 #define PW_TYPE_DATE                   3
+#define PW_TYPE_ABINARY                        4
+#define PW_TYPE_OCTETS                 5
+#define PW_TYPE_IFID                   6
+#define PW_TYPE_IPV6ADDR               7
+#define PW_TYPE_IPV6PREFIX             8
+#define PW_TYPE_BYTE                   9
+#define PW_TYPE_SHORT                  10
+#define PW_TYPE_ETHERNET               11
+#define PW_TYPE_SIGNED                 12
+#define PW_TYPE_COMBO_IP               13
+#define PW_TYPE_TLV                    14

 /* standard RADIUS codes */

--
2.1.4