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	The Main www.mageia.org Website	git

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	Commit message (Expand)	Author	Age	Files	Lines
*	Update Croatian translation	Yuri Chornoivan	2019-06-27	1	-3/+3
*	Update Croatian translation	Yuri Chornoivan	2019-06-27	2	-121/+262
*	Update news translation	Yuri Chornoivan	2019-06-27	1	-9/+9
*	sync languages with one changed string (expected release date)	filip	2019-06-26	1	-2/+2
*	properly regenerated cauldron i18n resource	filip	2019-02-23	1	-120/+121
*	mga6 resource copied from cauldron + page adjustment	filip	2019-02-23	1	-0/+457
*	sync l10n with "extend Mga6 support to about 3 months past Mga7 release" commit	filip	2019-01-20	1	-78/+27
*	update lang file	Manuel Hiebel	2018-12-02	2	-139/+148
*	Added more obivous text for Classic Installation that it remained mga6	filip	2018-10-10	1	-1/+5
*	mga6.1 l10n update	filip	2018-10-05	2	-8/+13
*	preparing i18n for mga6.1. part2	filip	2018-10-01	1	-163/+143
*	preparing i18n for mga6.1. part1	filip	2018-09-29	2	-47/+61
*	added warning for mga5 EOL + one small css fix	filip	2018-09-29	1	-241/+153
*	sync translations	filip	2018-04-28	1	-31/+40
*	sync community.pot and news.pot	filip	2018-04-28	2	-93/+97
*	Fix Croatian translation	Yuri Chornoivan	2018-03-11	25	-364/+477
*	Update Croatian translation	Yuri Chornoivan	2018-03-07	1	-7/+7
*	Update Croatian translation	Yuri Chornoivan	2018-02-26	1	-169/+161
*	Fix typo	Manuel Hiebel	2018-02-17	1	-2/+2
*	Update lang file	Manuel Hiebel	2018-02-17	1	-37/+45
*	EOL changed to EOS (end of support)	filip	2018-01-24	1	-7/+6
*	added CC-By-SA license	filip	2018-01-24	1	-30/+34
*	sync l10n	filip	2017-12-28	1	-20/+56
*	sync l10n	filip	2017-12-28	1	-26/+48
*	refresh hardware requirements	filip	2017-12-10	1	-10/+22
*	Fix the sentence according to David W. Hodgins proposal	Yuri Chornoivan	2017-11-09	1	-2/+2
*	push mga5 support from October 31th, 2017 to December 31st, 2017	filip	2017-11-08	1	-35/+55
*	sync l10n	filip	2017-10-25	1	-176/+83
*	synch about, map and timeline translations	filip	2017-07-17	3	-41/+63
*	preparing text for l10n (Network installation)	filip	2017-07-17	1	-20/+24
*	improving social network text suggested by Akien	filip	2017-07-17	1	-37/+41
*	sync l10n with support	Manuel Hiebel	2017-07-16	1	-22/+33
*	Sync l10n with last change	Manuel Hiebel	2017-07-16	2	-49/+58
*	release date i18n fix added	filip	2017-05-25	1	-2/+2
*	Improving a sentence according to report on ML	filip	2017-03-26	1	-22/+22
*	Update i18n string	Manuel Hiebel	2017-03-07	1	-36/+45
*	sync l10n files for documentation web page(s)	filip	2017-02-08	1	-7/+15
*	Update string for Mageia 5.1	Manuel Hiebel	2016-12-13	2	-11/+10
*	mga4.1 and mga5.1 added to timeline	filip	2016-12-07	1	-33/+48
*	update po files for mga5 dl page	Manuel Hiebel	2016-12-02	1	-135/+107
*	Fixed support date for mga5	filip	2016-11-15	1	-72/+30
*	make mentioning of dd italic	filip	2016-09-18	2	-2/+2
*	Calenco sentance l10n	filip	2016-08-15	1	-3/+7
*	Update translations	Yuri Chornoivan	2016-08-08	2	-41/+105
*	Make main wiki page link localisable mga#19114	filip	2016-08-06	3	-179/+127
*	sync translations for removed dual and LiveCD	filip	2016-07-01	1	-157/+127
*	sync l10n for mga6sta1	filip	2016-07-01	1	-194/+149
*	added Sixth General Assembly to the timeline page	filip	2016-06-29	1	-31/+40
*	sync translations for common footer	filip	2016-06-28	3	-87/+101
*	typo fix	filip	2016-05-20	1	-1/+1

• [next]

generated by cgit v1.2.1 (git 2.21.0) at 2024-06-07 04:43:52 +0000

/***********************************************************************
*
* discovery.c
*
* Perform PPPoE discovery
*
* Copyright (C) 1999 by Roaring Penguin Software Inc.
*
***********************************************************************/

static char const RCSID[] =
"$Id$";

#include "pppoe.h"

#ifdef HAVE_SYSLOG_H
#include <syslog.h>
#endif

#include <string.h>
#include <stdlib.h>
#include <errno.h>

#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif

#ifdef HAVE_SYS_UIO_H
#include <sys/uio.h>
#endif

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef USE_LINUX_PACKET
#include <sys/ioctl.h>
#include <fcntl.h>
#endif

#include <signal.h>

/**********************************************************************
*%FUNCTION: parseForHostUniq
*%ARGUMENTS:
* type -- tag type
* len -- tag length
* data -- tag data.
* extra -- user-supplied pointer.  This is assumed to be a pointer to int.
*%RETURNS:
* Nothing
*%DESCRIPTION:
* If a HostUnique tag is found which matches our PID, sets *extra to 1.
***********************************************************************/
void
parseForHostUniq(UINT16_t type, UINT16_t len, unsigned char *data,
		 void *extra)
{
    int *val = (int *) extra;
    if (type == TAG_HOST_UNIQ && len == sizeof(pid_t)) {
	pid_t tmp;
	memcpy(&tmp, data, len);
	if (tmp == getpid()) {
	    *val = 1;
	}
    }
}

/**********************************************************************
*%FUNCTION: packetIsForMe
*%ARGUMENTS:
* conn -- PPPoE connection info
* packet -- a received PPPoE packet
*%RETURNS:
* 1 if packet is for this PPPoE daemon; 0 otherwise.
*%DESCRIPTION:
* If we are using the Host-Unique tag, verifies that packet contains
* our unique identifier.
***********************************************************************/
int
packetIsForMe(PPPoEConnection *conn, PPPoEPacket *packet)
{
    int forMe = 0;

    /* If we're not using the Host-Unique tag, then accept the packet */
    if (!conn->useHostUniq) return 1;

    parsePacket(packet, parseForHostUniq, &forMe);
    return forMe;
}

/**********************************************************************
*%FUNCTION: parsePADOTags
*%ARGUMENTS:
* type -- tag type
* len -- tag length
* data -- tag data
* extra -- extra user data.  Should point to a PacketCriteria structure
*          which gets filled in according to selected AC name and service
*          name.
*%RETURNS:
* Nothing
*%DESCRIPTION:
* Picks interesting tags out of a PADO packet
***********************************************************************/
void
parsePADOTags(UINT16_t type, UINT16_t len, unsigned char *data,
	      void *extra)
{
    struct PacketCriteria *pc = (struct PacketCriteria *) extra;
    PPPoEConnection *conn = pc->conn;
    int i;

    switch(type) {
    case TAG_AC_NAME:
	if (conn->printACNames) {
	    printf("Access-Concentrator: %.*s\n", (int) len, data);
	}
	if (conn->acName && len == strlen(conn->acName) &&
	    !strncmp((char *) data, conn->acName, len)) {
	    pc->acNameOK = 1;
	}
	break;
    case TAG_SERVICE_NAME:
	if (conn->printACNames && len > 0) {
	    printf("       Service-Name: %.*s\n", (int) len, data);
	}
	if (conn->serviceName && len == strlen(conn->serviceName) &&
	    !strncmp((char *) data, conn->serviceName, len)) {
	    pc->serviceNameOK = 1;
	}
	break;
    case TAG_AC_COOKIE:
	if (conn->printACNames) {
	    printf("Got a cookie:");
	    /* Print first 20 bytes of cookie */
	    for (i=0; i<len && i < 20; i++) {
		printf(" %02x", (unsigned) data[i]);
	    }
	    if (i < len) printf("...");
	    printf("\n");
	}
	conn->cookie.type = htons(type);
	conn->cookie.length = htons(len);
	memcpy(conn->cookie.payload, data, len);
	break;
    case TAG_RELAY_SESSION_ID:
	if (conn->printACNames) {
	    printf("Got a Relay-ID:");
	    /* Print first 20 bytes of relay ID */
	    for (i=0; i<len && i < 20; i++) {
		printf(" %02x", (unsigned) data[i]);
	    }
	    if (i < len) printf("...");
	    printf("\n");
	}
	conn->relayId.type = htons(type);
	conn->relayId.length = htons(len);
	memcpy(conn->relayId.payload, data, len);
	break;
    case TAG_SERVICE_NAME_ERROR:
	if (conn->printACNames) {
	    printf("Got a Service-Name-Error tag: %.*s\n", (int) len, data);
	} else {
	    syslog(LOG_ERR, "PADO: Service-Name-Error: %.*s", (int) len, data);
	    exit(1);
	}
	break;
    case TAG_AC_SYSTEM_ERROR:
	if (conn->printACNames) {
	    printf("Got a System-Error tag: %.*s\n", (int) len, data);
	} else {
	    syslog(LOG_ERR, "PADO: System-Error: %.*s", (int) len, data);
	    exit(1);
	}
	break;
    case TAG_GENERIC_ERROR:
	if (conn->printACNames) {
	    printf("Got a Generic-Error tag: %.*s\n", (int) len, data);
	} else {
	    syslog(LOG_ERR, "PADO: Generic-Error: %.*s", (int) len, data);
	    exit(1);
	}
	break;
    }
}

/**********************************************************************
*%FUNCTION: parsePADSTags
*%ARGUMENTS:
* type -- tag type
* len -- tag length
* data -- tag data
* extra -- extra user data (pointer to PPPoEConnection structure)
*%RETURNS:
* Nothing
*%DESCRIPTION:
* Picks interesting tags out of a PADS packet
***********************************************************************/
void
parsePADSTags(UINT16_t type, UINT16_t len, unsigned char *data,
	      void *extra)
{
    PPPoEConnection *conn = (PPPoEConnection *) extra;
    switch(type) {
    case TAG_SERVICE_NAME:
	syslog(LOG_DEBUG, "PADS: Service-Name: '%.*s'", (int) len, data);
	break;
    case TAG_SERVICE_NAME_ERROR:
	syslog(LOG_ERR, "PADS: Service-Name-Error: %.*s", (int) len, data);
	fprintf(stderr, "PADS: Service-Name-Error: %.*s\n", (int) len, data);
	exit(1);
    case TAG_AC_SYSTEM_ERROR:
	syslog(LOG_ERR, "PADS: System-Error: %.*s", (int) len, data);
	fprintf(stderr, "PADS: System-Error: %.*s\n", (int) len, data);
	exit(1);
    case TAG_GENERIC_ERROR:
	syslog(LOG_ERR, "PADS: Generic-Error: %.*s", (int) len, data);
	fprintf(stderr, "PADS: Generic-Error: %.*s\n", (int) len, data);
	exit(1);
    case TAG_RELAY_SESSION_ID:
	conn->relayId.type = htons(type);
	conn->relayId.length = htons(len);
	memcpy(conn->relayId.payload, data, len);
	break;
    }
}

/***********************************************************************
*%FUNCTION: sendPADI
*%ARGUMENTS:
* conn -- PPPoEConnection structure
*%RETURNS:
* Nothing
*%DESCRIPTION:
* Sends a PADI packet
***********************************************************************/
void
sendPADI(PPPoEConnection *conn)
{
    PPPoEPacket packet;
    unsigned char *cursor = packet.payload;
    PPPoETag *svc = (PPPoETag *) (&packet.payload);
    UINT16_t namelen = 0;
    UINT16_t plen;

    if (conn->serviceName) {
	namelen = (UINT16_t) strlen(conn->serviceName);
    }
    plen = TAG_HDR_SIZE + namelen;
    CHECK_ROOM(cursor, packet.payload, plen);

    /* Set destination to Ethernet broadcast address */
    memset(packet.ethHdr.h_dest, 0xFF, ETH_ALEN);
    memcpy(packet.ethHdr.h_source, conn->myEth, ETH_ALEN);

    packet.ethHdr.h_proto = htons(Eth_PPPOE_Discovery);
    packet.ver = 1;
    packet.type = 1;
    packet.code = CODE_PADI;
    packet.session = 0;

    svc->type = TAG_SERVICE_NAME;
    svc->length = htons(namelen);
    CHECK_ROOM(cursor, packet.payload, namelen+TAG_HDR_SIZE);

    if (conn->serviceName) {
	memcpy(svc->payload, conn->serviceName, strlen(conn->serviceName));
    }
    cursor += namelen + TAG_HDR_SIZE;

    /* If we're using Host-Uniq, copy it over */
    if (conn->useHostUniq) {
	PPPoETag hostUniq;
	pid_t pid = getpid();
	hostUniq.type = htons(TAG_HOST_UNIQ);
	hostUniq.length = htons(sizeof(pid));
	memcpy(hostUniq.payload, &pid, sizeof(pid));
	CHECK_ROOM(cursor, packet.payload, sizeof(pid) + TAG_HDR_SIZE);
	memcpy(cursor, &hostUniq, sizeof(pid) + TAG_HDR_SIZE);
	cursor += sizeof(pid) + TAG_HDR_SIZE;
	plen += sizeof(pid) + TAG_HDR_SIZE;
    }

    packet.length = htons(plen);

    sendPacket(conn, conn->discoverySocket, &packet, (int) (plen + HDR_SIZE));
    if (conn->debugFile) {
	dumpPacket(conn->debugFile, &packet, "SENT");
	fprintf(conn->debugFile, "\n");
	fflush(conn->debugFile);
    }
}

/**********************************************************************
*%FUNCTION: waitForPADO
*%ARGUMENTS:
* conn -- PPPoEConnection structure
* timeout -- how long to wait (in seconds)
*%RETURNS:
* Nothing
*%DESCRIPTION:
* Waits for a PADO packet and copies useful information
***********************************************************************/
void
waitForPADO(PPPoEConnection *conn, int timeout)
{
    fd_set readable;
    int r;
    struct timeval tv;
    PPPoEPacket packet;
    int len;

    struct PacketCriteria pc;
    pc.conn          = conn;
    pc.acNameOK      = (conn->acName)      ? 0 : 1;
    pc.serviceNameOK = (conn->serviceName) ? 0 : 1;
	
    do {
	if (BPF_BUFFER_IS_EMPTY) {
	    tv.tv_sec = timeout;
	    tv.tv_usec = 0;
	
	    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) {
		fatalSys("select (waitForPADO)");
	    }
	    if (r == 0) return;        /* Timed out */
	}
	
	/* Get the packet */
	receivePacket(conn->discoverySocket, &packet, &len);

	/* Check length */
	if (ntohs(packet.length) + HDR_SIZE > len) {
	    syslog(LOG_ERR, "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 (conn->debugFile) {
	    dumpPacket(conn->debugFile, &packet, "RCVD");
	    fprintf(conn->debugFile, "\n");
	    fflush(conn->debugFile);
	}
	/* If it's not for us, loop again */
	if (!packetIsForMe(conn, &packet)) continue;

	if (packet.code == CODE_PADO) {
	    if (NOT_UNICAST(packet.ethHdr.h_source)) {
		printErr("Ignoring PADO packet from non-unicast MAC address");
		continue;
	    }
	    conn->numPADOs++;
	    if (conn->printACNames) {
		printf("--------------------------------------------------\n");
	    }
	    parsePacket(&packet, parsePADOTags, &pc);
	    if (pc.acNameOK && pc.serviceNameOK) {
		memcpy(conn->peerEth, packet.ethHdr.h_source, ETH_ALEN);
		if (conn->printACNames) {
		    printf("AC-Ethernet-Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
			   (unsigned) conn->peerEth[0], 
			   (unsigned) conn->peerEth[1],
			   (unsigned) conn->peerEth[2],
			   (unsigned) conn->peerEth[3],
			   (unsigned) conn->peerEth[4],
			   (unsigned) conn->peerEth[5]);
		    continue;
		}
		conn->discoveryState = STATE_RECEIVED_PADO;
		break;
	    }
	}
    } while (conn->discoveryState != STATE_RECEIVED_PADO);
}

/***********************************************************************
*%FUNCTION: sendPADR
*%ARGUMENTS:
* conn -- PPPoE connection structur
*%RETURNS:
* Nothing
*%DESCRIPTION:
* Sends a PADR packet
***********************************************************************/
void
sendPADR(PPPoEConnection *conn)
{
    PPPoEPacket packet;
    PPPoETag *svc = (PPPoETag *) packet.payload;
    unsigned char *cursor = packet.payload;

    UINT16_t namelen = 0;
    UINT16_t plen;

    if (conn->serviceName) {
	namelen = (UINT16_t) strlen(conn->serviceName);
    }
    plen = TAG_HDR_SIZE + namelen;
    CHECK_ROOM(cursor, packet.payload, plen);

    memcpy(packet.ethHdr.h_dest, conn->peerEth, ETH_ALEN);
    memcpy(packet.ethHdr.h_source, conn->myEth, ETH_ALEN);

    packet.ethHdr.h_proto = htons(Eth_PPPOE_Discovery);
    packet.ver = 1;
    packet.type = 1;
    packet.code = CODE_PADR;
    packet.session = 0;

    svc->type = TAG_SERVICE_NAME;
    svc->length = htons(namelen);
    if (conn->serviceName) {
	memcpy(svc->payload, conn->serviceName, namelen);
    }
    cursor += namelen + TAG_HDR_SIZE;

    /* If we're using Host-Uniq, copy it over */
    if (conn->useHostUniq) {
	PPPoETag hostUniq;
	pid_t pid = getpid();
	hostUniq.type = htons(TAG_HOST_UNIQ);
	hostUniq.length = htons(sizeof(pid));
	memcpy(hostUniq.payload, &pid, sizeof(pid));
	CHECK_ROOM(cursor, packet.payload, sizeof(pid)+TAG_HDR_SIZE);
	memcpy(cursor, &hostUniq, sizeof(pid) + TAG_HDR_SIZE);
	cursor += sizeof(pid) + TAG_HDR_SIZE;
	plen += sizeof(pid) + TAG_HDR_SIZE;
    }

    /* Copy cookie and relay-ID if needed */
    if (conn->cookie.type) {
	CHECK_ROOM(cursor, packet.payload,
		   ntohs(conn->cookie.length) + TAG_HDR_SIZE);
	memcpy(cursor, &conn->cookie, ntohs(conn->cookie.length) + TAG_HDR_SIZE);
	cursor += ntohs(conn->cookie.length) + TAG_HDR_SIZE;
	plen += ntohs(conn->cookie.length) + TAG_HDR_SIZE;
    }

    if (conn->relayId.type) {
	CHECK_ROOM(cursor, packet.payload,
		   ntohs(conn->relayId.length) + TAG_HDR_SIZE);
	memcpy(cursor, &conn->relayId, ntohs(conn->relayId.length) + TAG_HDR_SIZE);
	cursor += ntohs(conn->relayId.length) + TAG_HDR_SIZE;
	plen += ntohs(conn->relayId.length) + TAG_HDR_SIZE;
    }

    packet.length = htons(plen);
    sendPacket(conn, conn->discoverySocket, &packet, (int) (plen + HDR_SIZE));
    if (conn->debugFile) {
	dumpPacket(conn->debugFile, &packet, "SENT");
	fprintf(conn->debugFile, "\n");
	fflush(conn->debugFile);
    }
}

/**********************************************************************
*%FUNCTION: waitForPADS
*%ARGUMENTS:
* conn -- PPPoE connection info
* timeout -- how long to wait (in seconds)
*%RETURNS:
* Nothing
*%DESCRIPTION:
* Waits for a PADS packet and copies useful information
***********************************************************************/
void
waitForPADS(PPPoEConnection *conn, int timeout)
{
    fd_set readable;
    int r;
    struct timeval tv;
    PPPoEPacket packet;
    int len;

    do {
	if (BPF_BUFFER_IS_EMPTY) {
	    tv.tv_sec = timeout;
	    tv.tv_usec = 0;
	    
	    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) {
		fatalSys("select (waitForPADS)");
	    }
	    if (r == 0) return;
	}

	/* Get the packet */
	receivePacket(conn->discoverySocket, &packet, &len);

	/* Check length */
	if (ntohs(packet.length) + HDR_SIZE > len) {
	    syslog(LOG_ERR, "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 (conn->debugFile) {
	    dumpPacket(conn->debugFile, &packet, "RCVD");
	    fprintf(conn->debugFile, "\n");
	    fflush(conn->debugFile);
	}

	/* 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 */
	    parsePacket(&packet, parsePADSTags, conn);
	    conn->discoveryState = STATE_SESSION;
	    break;
	}
    } while (conn->discoveryState != STATE_SESSION);

    /* Don't bother with ntohs; we'll just end up converting it back... */
    conn->session = packet.session;

    syslog(LOG_INFO, "PPP session is %d", (int) ntohs(conn->session));

    /* RFC 2516 says session id MUST NOT be zero or 0xFFFF */
    if (ntohs(conn->session) == 0 || ntohs(conn->session) == 0xFFFF) {
	syslog(LOG_ERR, "Access concentrator used a session value of %x -- the AC is violating RFC 2516", (unsigned int) ntohs(conn->session));
    }
}

/**********************************************************************
*%FUNCTION: discovery
*%ARGUMENTS:
* conn -- PPPoE connection info structure
*%RETURNS:
* Nothing
*%DESCRIPTION:
* Performs the PPPoE discovery phase
***********************************************************************/
void
discovery(PPPoEConnection *conn)
{
    int padiAttempts = 0;
    int padrAttempts = 0;
    int timeout = PADI_TIMEOUT;

    /* Skip discovery and don't open discovery socket? */
    if (conn->skipDiscovery && conn->noDiscoverySocket) {
	conn->discoveryState = STATE_SESSION;
	return;
    }

    conn->discoverySocket =
	openInterface(conn->ifName, Eth_PPPOE_Discovery, conn->myEth);

    /* Skip discovery? */
    if (conn->skipDiscovery) {
	conn->discoveryState = STATE_SESSION;
	if (conn->killSession) {
	    sendPADT(conn, "RP-PPPoE: Session killed manually");
	    exit(0);
	}
	return;
    }

    do {
	padiAttempts++;
	if (padiAttempts > MAX_PADI_ATTEMPTS) {
	    rp_fatal("Timeout waiting for PADO packets");
	}
	sendPADI(conn);
	conn->discoveryState = STATE_SENT_PADI;
	waitForPADO(conn, timeout);

	/* If we're just probing for access concentrators, don't do
	   exponential backoff.  This reduces the time for an unsuccessful
	   probe to 15 seconds. */
	if (!conn->printACNames) {
	    timeout *= 2;
	}
	if (conn->printACNames && conn->numPADOs) {
	    break;
	}
    } while (conn->discoveryState == STATE_SENT_PADI);

    /* If we're only printing access concentrator names, we're done */
    if (conn->printACNames) {
	printf("--------------------------------------------------\n");
	exit(0);
    }

    timeout = PADI_TIMEOUT;
    do {
	padrAttempts++;
	if (padrAttempts > MAX_PADI_ATTEMPTS) {
	    rp_fatal("Timeout waiting for PADS packets");
	}
	sendPADR(conn);
	conn->discoveryState = STATE_SENT_PADR;
	waitForPADS(conn, timeout);
	timeout *= 2;
    } while (conn->discoveryState == STATE_SENT_PADR);

    /* We're done. */
    conn->discoveryState = STATE_SESSION;
    return;
}