pppd: add experimental support for PEAP protocol, an extension of EAP

[ppp.git] / pppd / sys-linux.c

diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c
index 8d6eee93550622d5cbe0b9803fe714c11d65b713..e1bb8108ea0964d81d0c4b64ead2132e97aa5889 100644 (file)
--- a/pppd/sys-linux.c
+++ b/pppd/sys-linux.c
@@ -697,11 +697,11 @@ static int make_ppp_unit(void)
 
        if (x == 0 && req_ifname[0] != '\0') {
                struct ifreq ifr;
-               char t[MAXIFNAMELEN];
+               char t[IFNAMSIZ];
                memset(&ifr, 0, sizeof(struct ifreq));
                slprintf(t, sizeof(t), "%s%d", PPP_DRV_NAME, ifunit);
-               strlcpy(ifr.ifr_name, t, IF_NAMESIZE);
-               strlcpy(ifr.ifr_newname, req_ifname, IF_NAMESIZE);
+               strlcpy(ifr.ifr_name, t, IFNAMSIZ);
+               strlcpy(ifr.ifr_newname, req_ifname, IFNAMSIZ);
                x = ioctl(sock_fd, SIOCSIFNAME, &ifr);
                if (x < 0)
                    error("Couldn't rename interface %s to %s: %m", t, req_ifname);
@@ -3013,7 +3013,14 @@ static int sif6addr_rtnetlink(unsigned int iface, eui64_t our_eui64, eui64_t his
 
     /* error == 0 indicates success, negative value is errno code */
     if (nlresp.nlerr.error != 0) {
-        error("sif6addr_rtnetlink: %s (line %d)", strerror(-nlresp.nlerr.error), __LINE__);
+        /*
+         * Linux kernel versions prior 3.11 do not support setting IPv6 peer
+         * addresses and error response is expected. On older kernel versions
+         * do not show this error message. On error pppd tries to fallback to
+         * the old IOCTL method.
+         */
+        if (kernel_version >= KVERSION(3,11,0))
+            error("sif6addr_rtnetlink: %s (line %d)", strerror(-nlresp.nlerr.error), __LINE__);
         return 0;
     }
 
@@ -3029,6 +3036,7 @@ int sif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
     struct in6_ifreq ifr6;
     struct ifreq ifr;
     struct in6_rtmsg rt6;
+    int ret;
 
     if (sock6_fd < 0) {
        errno = -sock6_fd;
@@ -3044,8 +3052,16 @@ int sif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
 
     if (kernel_version >= KVERSION(2,1,16)) {
         /* Set both local address and remote peer address (with route for it) via rtnetlink */
-        return sif6addr_rtnetlink(ifr.ifr_ifindex, our_eui64, his_eui64);
+        ret = sif6addr_rtnetlink(ifr.ifr_ifindex, our_eui64, his_eui64);
     } else {
+        ret = 0;
+    }
+
+    /*
+     * Linux kernel versions prior 3.11 do not support setting IPv6 peer address
+     * via rtnetlink. So if sif6addr_rtnetlink() fails then try old IOCTL method.
+     */
+    if (!ret) {
         /* Local interface */
         memset(&ifr6, 0, sizeof(ifr6));
         IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64);