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270 lines
9.0 KiB
Diff
270 lines
9.0 KiB
Diff
--- a/pppd/plugins/rp-pppoe/common.c
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+++ b/pppd/plugins/rp-pppoe/common.c
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@@ -119,15 +119,11 @@ sendPADT(PPPoEConnection *conn, char con
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conn->session = 0;
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/* If we're using Host-Uniq, copy it over */
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- if (conn->useHostUniq) {
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- PPPoETag hostUniq;
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- pid_t pid = getpid();
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- hostUniq.type = htons(TAG_HOST_UNIQ);
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- hostUniq.length = htons(sizeof(pid));
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- memcpy(hostUniq.payload, &pid, sizeof(pid));
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- memcpy(cursor, &hostUniq, sizeof(pid) + TAG_HDR_SIZE);
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- cursor += sizeof(pid) + TAG_HDR_SIZE;
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- plen += sizeof(pid) + TAG_HDR_SIZE;
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+ if (conn->hostUniq.length) {
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+ int len = ntohs(conn->hostUniq.length);
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+ memcpy(cursor, &conn->hostUniq, len + TAG_HDR_SIZE);
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+ cursor += len + TAG_HDR_SIZE;
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+ plen += len + TAG_HDR_SIZE;
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}
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/* Copy error message */
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--- a/pppd/plugins/rp-pppoe/discovery.c
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+++ b/pppd/plugins/rp-pppoe/discovery.c
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@@ -80,13 +80,10 @@ static void
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parseForHostUniq(UINT16_t type, UINT16_t len, unsigned char *data,
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void *extra)
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{
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- int *val = (int *) extra;
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- if (type == TAG_HOST_UNIQ && len == sizeof(pid_t)) {
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- pid_t tmp;
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- memcpy(&tmp, data, len);
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- if (tmp == getpid()) {
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- *val = 1;
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- }
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+ PPPoETag *tag = extra;
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+
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+ if (type == TAG_HOST_UNIQ && len == ntohs(tag->length)) {
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+ tag->length = memcmp(data, tag->payload, len);
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}
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}
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@@ -104,16 +101,16 @@ parseForHostUniq(UINT16_t type, UINT16_t
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static int
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packetIsForMe(PPPoEConnection *conn, PPPoEPacket *packet)
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{
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- int forMe = 0;
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+ PPPoETag hostUniq = conn->hostUniq;
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/* If packet is not directed to our MAC address, forget it */
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if (memcmp(packet->ethHdr.h_dest, conn->myEth, ETH_ALEN)) return 0;
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/* If we're not using the Host-Unique tag, then accept the packet */
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- if (!conn->useHostUniq) return 1;
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+ if (!conn->hostUniq.length) return 1;
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- parsePacket(packet, parseForHostUniq, &forMe);
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- return forMe;
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+ parsePacket(packet, parseForHostUniq, &hostUniq);
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+ return (hostUniq.length == 0);
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}
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/**********************************************************************
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@@ -301,16 +298,12 @@ sendPADI(PPPoEConnection *conn)
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}
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/* If we're using Host-Uniq, copy it over */
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- if (conn->useHostUniq) {
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- PPPoETag hostUniq;
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- pid_t pid = getpid();
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- hostUniq.type = htons(TAG_HOST_UNIQ);
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- hostUniq.length = htons(sizeof(pid));
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- memcpy(hostUniq.payload, &pid, sizeof(pid));
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- CHECK_ROOM(cursor, packet.payload, sizeof(pid) + TAG_HDR_SIZE);
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- memcpy(cursor, &hostUniq, sizeof(pid) + TAG_HDR_SIZE);
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- cursor += sizeof(pid) + TAG_HDR_SIZE;
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- plen += sizeof(pid) + TAG_HDR_SIZE;
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+ if (conn->hostUniq.length) {
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+ int len = ntohs(conn->hostUniq.length);
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+ CHECK_ROOM(cursor, packet.payload, len + TAG_HDR_SIZE);
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+ memcpy(cursor, &conn->hostUniq, len + TAG_HDR_SIZE);
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+ cursor += len + TAG_HDR_SIZE;
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+ plen += len + TAG_HDR_SIZE;
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}
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/* Add our maximum MTU/MRU */
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@@ -478,16 +471,12 @@ sendPADR(PPPoEConnection *conn)
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cursor += namelen + TAG_HDR_SIZE;
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/* If we're using Host-Uniq, copy it over */
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- if (conn->useHostUniq) {
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- PPPoETag hostUniq;
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- pid_t pid = getpid();
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- hostUniq.type = htons(TAG_HOST_UNIQ);
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- hostUniq.length = htons(sizeof(pid));
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- memcpy(hostUniq.payload, &pid, sizeof(pid));
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- CHECK_ROOM(cursor, packet.payload, sizeof(pid)+TAG_HDR_SIZE);
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- memcpy(cursor, &hostUniq, sizeof(pid) + TAG_HDR_SIZE);
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- cursor += sizeof(pid) + TAG_HDR_SIZE;
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- plen += sizeof(pid) + TAG_HDR_SIZE;
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+ if (conn->hostUniq.length) {
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+ int len = ntohs(conn->hostUniq.length);
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+ CHECK_ROOM(cursor, packet.payload, len+TAG_HDR_SIZE);
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+ memcpy(cursor, &conn->hostUniq, len + TAG_HDR_SIZE);
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+ cursor += len + TAG_HDR_SIZE;
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+ plen += len + TAG_HDR_SIZE;
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}
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/* Add our maximum MTU/MRU */
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--- a/pppd/plugins/rp-pppoe/plugin.c
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+++ b/pppd/plugins/rp-pppoe/plugin.c
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@@ -65,6 +65,7 @@ static char *existingSession = NULL;
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static int printACNames = 0;
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static char *pppoe_reqd_mac = NULL;
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unsigned char pppoe_reqd_mac_addr[6];
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+static char *host_uniq = NULL;
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static int PPPoEDevnameHook(char *cmd, char **argv, int doit);
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static option_t Options[] = {
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@@ -82,6 +83,8 @@ static option_t Options[] = {
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"Be verbose about discovered access concentrators"},
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{ "pppoe-mac", o_string, &pppoe_reqd_mac,
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"Only connect to specified MAC address" },
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+ { "host-uniq", o_string, &host_uniq,
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+ "Specify custom Host-Uniq" },
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{ NULL }
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};
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int (*OldDevnameHook)(char *cmd, char **argv, int doit) = NULL;
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@@ -107,7 +110,6 @@ PPPOEInitDevice(void)
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conn->ifName = devnam;
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conn->discoverySocket = -1;
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conn->sessionSocket = -1;
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- conn->useHostUniq = 1;
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conn->printACNames = printACNames;
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conn->discoveryTimeout = PADI_TIMEOUT;
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return 1;
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@@ -163,6 +165,9 @@ PPPOEConnectDevice(void)
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if (lcp_wantoptions[0].mru > ifr.ifr_mtu - TOTAL_OVERHEAD)
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lcp_wantoptions[0].mru = ifr.ifr_mtu - TOTAL_OVERHEAD;
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+ if (host_uniq && !parseHostUniq(host_uniq, &conn->hostUniq))
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+ fatal("Illegal value for host-uniq option");
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+
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conn->acName = acName;
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conn->serviceName = pppd_pppoe_service;
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strlcpy(ppp_devnam, devnam, sizeof(ppp_devnam));
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--- a/pppd/plugins/rp-pppoe/pppoe-discovery.c
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+++ b/pppd/plugins/rp-pppoe/pppoe-discovery.c
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@@ -344,7 +344,7 @@ packetIsForMe(PPPoEConnection *conn, PPP
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if (memcmp(packet->ethHdr.h_dest, conn->myEth, ETH_ALEN)) return 0;
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/* If we're not using the Host-Unique tag, then accept the packet */
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- if (!conn->useHostUniq) return 1;
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+ if (!conn->hostUniq.length) return 1;
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parsePacket(packet, parseForHostUniq, &forMe);
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return forMe;
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@@ -470,16 +470,12 @@ sendPADI(PPPoEConnection *conn)
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cursor += namelen + TAG_HDR_SIZE;
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/* If we're using Host-Uniq, copy it over */
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- if (conn->useHostUniq) {
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- PPPoETag hostUniq;
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- pid_t pid = getpid();
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- hostUniq.type = htons(TAG_HOST_UNIQ);
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- hostUniq.length = htons(sizeof(pid));
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- memcpy(hostUniq.payload, &pid, sizeof(pid));
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- CHECK_ROOM(cursor, packet.payload, sizeof(pid) + TAG_HDR_SIZE);
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- memcpy(cursor, &hostUniq, sizeof(pid) + TAG_HDR_SIZE);
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- cursor += sizeof(pid) + TAG_HDR_SIZE;
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- plen += sizeof(pid) + TAG_HDR_SIZE;
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+ if (conn->hostUniq.length) {
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+ int len = ntohs(conn->hostUniq.length);
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+ CHECK_ROOM(cursor, packet.payload, len + TAG_HDR_SIZE);
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+ memcpy(cursor, &conn->hostUniq, len + TAG_HDR_SIZE);
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+ cursor += len + TAG_HDR_SIZE;
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+ plen += len + TAG_HDR_SIZE;
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}
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packet.length = htons(plen);
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@@ -641,7 +637,7 @@ int main(int argc, char *argv[])
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memset(conn, 0, sizeof(PPPoEConnection));
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- while ((opt = getopt(argc, argv, "I:D:VUAS:C:h")) > 0) {
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+ while ((opt = getopt(argc, argv, "I:D:VUW:AS:C:h")) > 0) {
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switch(opt) {
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case 'S':
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conn->serviceName = xstrdup(optarg);
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@@ -650,7 +646,23 @@ int main(int argc, char *argv[])
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conn->acName = xstrdup(optarg);
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break;
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case 'U':
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- conn->useHostUniq = 1;
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+ if(conn->hostUniq.length) {
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+ fprintf(stderr, "-U and -W are mutually exclusive\n");
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+ exit(EXIT_FAILURE);
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+ }
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+ char pidbuf[5];
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+ snprintf(pidbuf, sizeof(pidbuf), "%04x", getpid());
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+ parseHostUniq(pidbuf, &conn->hostUniq);
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+ break;
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+ case 'W':
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+ if(conn->hostUniq.length) {
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+ fprintf(stderr, "-U and -W are mutually exclusive\n");
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+ exit(EXIT_FAILURE);
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+ }
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+ if (!parseHostUniq(optarg, &conn->hostUniq)) {
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+ fprintf(stderr, "Invalid host-uniq argument: %s\n", optarg);
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+ exit(EXIT_FAILURE);
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+ }
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break;
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case 'D':
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conn->debugFile = fopen(optarg, "w");
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--- a/pppd/plugins/rp-pppoe/pppoe.h
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+++ b/pppd/plugins/rp-pppoe/pppoe.h
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@@ -21,6 +21,8 @@
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#include <stdio.h> /* For FILE */
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#include <sys/types.h> /* For pid_t */
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+#include <ctype.h>
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+#include <string.h>
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/* How do we access raw Ethernet devices? */
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#undef USE_LINUX_PACKET
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@@ -224,7 +226,7 @@ typedef struct PPPoEConnectionStruct {
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char *serviceName; /* Desired service name, if any */
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char *acName; /* Desired AC name, if any */
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int synchronous; /* Use synchronous PPP */
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- int useHostUniq; /* Use Host-Uniq tag */
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+ PPPoETag hostUniq; /* Use Host-Uniq tag */
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int printACNames; /* Just print AC names */
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FILE *debugFile; /* Debug file for dumping packets */
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int numPADOs; /* Number of PADO packets received */
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@@ -280,6 +282,33 @@ void pppoe_printpkt(PPPoEPacket *packet,
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void (*printer)(void *, char *, ...), void *arg);
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void pppoe_log_packet(const char *prefix, PPPoEPacket *packet);
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+static inline int parseHostUniq(const char *uniq, PPPoETag *tag)
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+{
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+ int i, len = strlen(uniq);
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+
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+#define hex(x) \
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+ (((x) <= '9') ? ((x) - '0') : \
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+ (((x) <= 'F') ? ((x) - 'A' + 10) : \
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+ ((x) - 'a' + 10)))
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+
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+ if (len % 2)
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+ return 0;
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+
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+ for (i = 0; i < len; i += 2)
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+ {
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+ if (!isxdigit(uniq[i]) || !isxdigit(uniq[i+1]))
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+ return 0;
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+
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+ tag->payload[i / 2] = (char)(16 * hex(uniq[i]) + hex(uniq[i+1]));
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+ }
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+
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+#undef hex
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+
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+ tag->type = htons(TAG_HOST_UNIQ);
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+ tag->length = htons(len / 2);
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+ return 1;
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+}
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+
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#define SET_STRING(var, val) do { if (var) free(var); var = strDup(val); } while(0);
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#define CHECK_ROOM(cursor, start, len) \
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