--- ppp-2.4.6/pppd/plugins/rp-pppoe/discovery.c
+++ ppp-2.4.6/pppd/plugins/rp-pppoe/discovery.c
@@ -39,6 +39,7 @@
 #endif
 
 #include <signal.h>
+#include <time.h>
 
 /* Calculate time remaining until *exp, return 0 if now >= *exp */
 static int time_left(struct timeval *diff, struct timeval *exp)
@@ -251,6 +252,80 @@
 }
 
 /***********************************************************************
+*%FUNCTION: recvPacketForMe
+*%ARGUMENTS:
+* packet -- output parameter
+* len -- output parameter length
+* conn -- connection
+* start -- operation startup timestamp
+* timeout -- how long to wait (in seconds)
+*%RETURNS:
+* -1:  error
+*  0:  timed out
+*  1:  packet received
+*%DESCRIPTION:
+* receive and filter junk packets
+***********************************************************************/
+
+static int
+recvPacketForMe(PPPoEPacket *packet, int *len, PPPoEConnection *conn, time_t start, int timeout)
+{
+    fd_set readable;
+    int r;
+    struct timeval tv;
+    time_t now;
+    int time_remain;
+
+    do {
+	time(&now);
+	time_remain = timeout - (int)difftime(now, start);
+	if (time_remain <= 0) return 0;  /* Timed out */
+
+	if (BPF_BUFFER_IS_EMPTY) {
+	    tv.tv_sec = time_remain;
+	    tv.tv_usec = 0;
+
+	    FD_ZERO(&readable);
+	    FD_SET(conn->discoverySocket, &readable);
+
+	    r = select(conn->discoverySocket+1, &readable, NULL, NULL, &tv);
+	    if (r < 0)
+	    {
+		if (errno == EINTR)
+		{
+		    continue;   /* interrupted, so retry */
+		}else
+		{
+		    error("pppoe: recvPacketForMe: select: %m");
+		    return -1;
+		}
+	    }
+
+	    if (r == 0) return 0;	/* Timed out */
+	}
+
+	/* Get the packet */
+	receivePacket(conn->discoverySocket, packet, len);
+
+	/* Check length */
+	if (ntohs(packet->length) + HDR_SIZE > *len) {
+	    error("Bogus PPPoE length field (%u)",
+		   (unsigned int) ntohs(packet->length));
+	    continue;
+	}
+
+#ifdef USE_BPF
+	/* If it's not a Discovery packet, loop again */
+	if (etherType(&packet) != Eth_PPPOE_Discovery) continue;
+#endif
+	/* If it's not for us, loop again */
+	}while ( ! packetIsForMe(conn, packet));
+
+	return 1;
+}
+
+
+/***********************************************************************
 *%FUNCTION: sendPADI
 *%ARGUMENTS:
 * conn -- PPPoEConnection structure
@@ -344,13 +419,12 @@
 void
 waitForPADO(PPPoEConnection *conn, int timeout)
 {
-    fd_set readable;
     int r;
-    struct timeval tv;
     struct timeval expire_at;
 
     PPPoEPacket packet;
     int len;
+    time_t start;
 
     struct PacketCriteria pc;
     pc.conn          = conn;
@@ -367,43 +441,10 @@
     }
     expire_at.tv_sec += timeout;
 
+    time(&start);
     do {
-	if (BPF_BUFFER_IS_EMPTY) {
-	    if (!time_left(&tv, &expire_at))
-		return;		/* Timed out */
-
-	    FD_ZERO(&readable);
-	    FD_SET(conn->discoverySocket, &readable);
-
-	    while(1) {
-		r = select(conn->discoverySocket+1, &readable, NULL, NULL, &tv);
-		if (r >= 0 || errno != EINTR) break;
-	    }
-	    if (r < 0) {
-		error("select (waitForPADO): %m");
-		return;
-	    }
-	    if (r == 0)
-		return;		/* Timed out */
-	}
-
-	/* Get the packet */
-	receivePacket(conn->discoverySocket, &packet, &len);
-
-	/* Check length */
-	if (ntohs(packet.length) + HDR_SIZE > len) {
-	    error("Bogus PPPoE length field (%u)",
-		   (unsigned int) ntohs(packet.length));
-	    continue;
-	}
-
-#ifdef USE_BPF
-	/* If it's not a Discovery packet, loop again */
-	if (etherType(&packet) != Eth_PPPOE_Discovery) continue;
-#endif
-
-	/* If it's not for us, loop again */
-	if (!packetIsForMe(conn, &packet)) continue;
+	r = recvPacketForMe(&packet, &len, conn, start, timeout);
+	if (r<=0) return;  /* Timed out or error */
 
 	if (packet.code == CODE_PADO) {
 	    if (NOT_UNICAST(packet.ethHdr.h_source)) {
@@ -537,13 +578,12 @@
 static void
 waitForPADS(PPPoEConnection *conn, int timeout)
 {
-    fd_set readable;
     int r;
-    struct timeval tv;
     struct timeval expire_at;
 
     PPPoEPacket packet;
     int len;
+    time_t start;
 
     if (gettimeofday(&expire_at, NULL) < 0) {
 	error("gettimeofday (waitForPADS): %m");
@@ -551,48 +591,15 @@
     }
     expire_at.tv_sec += timeout;
 
+    time(&start);
     conn->error = 0;
     do {
-	if (BPF_BUFFER_IS_EMPTY) {
-	    if (!time_left(&tv, &expire_at))
-		return;		/* Timed out */
-
-	    FD_ZERO(&readable);
-	    FD_SET(conn->discoverySocket, &readable);
-
-	    while(1) {
-		r = select(conn->discoverySocket+1, &readable, NULL, NULL, &tv);
-		if (r >= 0 || errno != EINTR) break;
-	    }
-	    if (r < 0) {
-		error("select (waitForPADS): %m");
-		return;
-	    }
-	    if (r == 0)
-		return;		/* Timed out */
-	}
-
-	/* Get the packet */
-	receivePacket(conn->discoverySocket, &packet, &len);
-
-	/* Check length */
-	if (ntohs(packet.length) + HDR_SIZE > len) {
-	    error("Bogus PPPoE length field (%u)",
-		   (unsigned int) ntohs(packet.length));
-	    continue;
-	}
-
-#ifdef USE_BPF
-	/* If it's not a Discovery packet, loop again */
-	if (etherType(&packet) != Eth_PPPOE_Discovery) continue;
-#endif
+	r = recvPacketForMe(&packet, &len, conn, start, timeout);
+	if (r<=0) return;  /* Timed out or error */
 
 	/* If it's not from the AC, it's not for me */
 	if (memcmp(packet.ethHdr.h_source, conn->peerEth, ETH_ALEN)) continue;
 
-	/* If it's not for us, loop again */
-	if (!packetIsForMe(conn, &packet)) continue;
-
 	/* Is it PADS?  */
 	if (packet.code == CODE_PADS) {
 	    /* Parse for goodies */