pppoe: Custom host-uniq tag

[ppp.git] / pppd / plugins / rp-pppoe / plugin.c

diff --git a/pppd/plugins/rp-pppoe/plugin.c b/pppd/plugins/rp-pppoe/plugin.c
index da50cdf2b9d3956a90a61e9209a2249a7ca61faa..9ceb66d8fcc034fceba9caa8e79f42284116370d 100644 (file)
--- a/pppd/plugins/rp-pppoe/plugin.c
+++ b/pppd/plugins/rp-pppoe/plugin.c
@@ -68,6 +68,7 @@ static char *existingSession = NULL;
 static int printACNames = 0;
 static char *pppoe_reqd_mac = NULL;
 unsigned char pppoe_reqd_mac_addr[6];
+static char *host_uniq;
 
 static int PPPoEDevnameHook(char *cmd, char **argv, int doit);
 static option_t Options[] = {
@@ -85,6 +86,8 @@ static option_t Options[] = {
       "Be verbose about discovered access concentrators"},
     { "pppoe-mac", o_string, &pppoe_reqd_mac,
       "Only connect to specified MAC address" },
+    { "host-uniq", o_string, &host_uniq,
+      "Set the Host-Uniq to the supplied hex string" },
     { NULL }
 };
 int (*OldDevnameHook)(char *cmd, char **argv, int doit) = NULL;
@@ -110,7 +113,6 @@ PPPOEInitDevice(void)
     conn->ifName = devnam;
     conn->discoverySocket = -1;
     conn->sessionSocket = -1;
-    conn->useHostUniq = 1;
     conn->printACNames = printACNames;
     conn->discoveryTimeout = PADI_TIMEOUT;
     return 1;
@@ -153,7 +155,7 @@ PPPOEConnectDevice(void)
        error("Can't get MTU for %s: %m", conn->ifName);
        goto errout;
     }
-    strncpy(ifr.ifr_name, conn->ifName, sizeof(ifr.ifr_name));
+    strlcpy(ifr.ifr_name, conn->ifName, sizeof(ifr.ifr_name));
     if (ioctl(s, SIOCGIFMTU, &ifr) < 0) {
        error("Can't get MTU for %s: %m", conn->ifName);
        close(s);
@@ -166,6 +168,17 @@ PPPOEConnectDevice(void)
     if (lcp_wantoptions[0].mru > ifr.ifr_mtu - TOTAL_OVERHEAD)
        lcp_wantoptions[0].mru = ifr.ifr_mtu - TOTAL_OVERHEAD;
 
+    if (host_uniq) {
+       if (!parseHostUniq(host_uniq, &conn->hostUniq))
+           fatal("Illegal value for host-uniq option");
+    } else {
+       /* if a custom host-uniq is not supplied, use our PID */
+       pid_t pid = getpid();
+       conn->hostUniq.type = htons(TAG_HOST_UNIQ);
+       conn->hostUniq.length = htons(sizeof(pid));
+       memcpy(conn->hostUniq.payload, &pid, sizeof(pid));
+    }
+
     conn->acName = acName;
     conn->serviceName = pppd_pppoe_service;
     strlcpy(ppp_devnam, devnam, sizeof(ppp_devnam));
@@ -273,9 +286,10 @@ PPPOEDisconnectDevice(void)
                sizeof(struct sockaddr_pppox)) < 0 && errno != EALREADY)
        error("Failed to disconnect PPPoE socket: %d %m", errno);
     close(conn->sessionSocket);
-    /* don't send PADT?? */
-    if (conn->discoverySocket >= 0)
+    if (conn->discoverySocket >= 0) {
+        sendPADT(conn, NULL);
        close(conn->discoverySocket);
+    }
 }
 
 static void
@@ -326,7 +340,7 @@ PPPoEDevnameHook(char *cmd, char **argv, int doit)
 
     /* Try getting interface index */
     if (r) {
-       strncpy(ifr.ifr_name, cmd, sizeof(ifr.ifr_name));
+       strlcpy(ifr.ifr_name, cmd, sizeof(ifr.ifr_name));
        if (ioctl(fd, SIOCGIFINDEX, &ifr) < 0) {
            r = 0;
        } else {
@@ -345,7 +359,7 @@ PPPoEDevnameHook(char *cmd, char **argv, int doit)
     /* Close socket */
     close(fd);
     if (r && doit) {
-       strncpy(devnam, cmd, sizeof(devnam));
+       strlcpy(devnam, cmd, sizeof(devnam));
        if (the_channel != &pppoe_channel) {
 
            the_channel = &pppoe_channel;