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authorJo-Philipp Wich <jow@openwrt.org>2011-01-19 02:00:57 +0000
committerJo-Philipp Wich <jow@openwrt.org>2011-01-19 02:00:57 +0000
commit1868be702d06454a1ba6fc5a58e3ac430ad74a37 (patch)
tree8a8a728b95b01ef2ceef55c008039f55fb28f42a /package/ppp/patches
parent18ed5bca9b429203ecca26dc50c7adca540e3dd0 (diff)
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ppp: don't die on malformed PADS frames that might appear on instable DSL lines
SVN-Revision: 25044
Diffstat (limited to 'package/ppp/patches')
-rw-r--r--package/ppp/patches/350-survive_bad_pads_packets.patch109
1 files changed, 109 insertions, 0 deletions
diff --git a/package/ppp/patches/350-survive_bad_pads_packets.patch b/package/ppp/patches/350-survive_bad_pads_packets.patch
new file mode 100644
index 0000000..66c656d
--- /dev/null
+++ b/package/ppp/patches/350-survive_bad_pads_packets.patch
@@ -0,0 +1,109 @@
+--- a/pppd/plugins/rp-pppoe/common.c
++++ b/pppd/plugins/rp-pppoe/common.c
+@@ -75,7 +75,9 @@ parsePacket(PPPoEPacket *packet, ParseFu
+ error("Invalid PPPoE tag length (%u)", tagLen);
+ return -1;
+ }
+- func(tagType, tagLen, curTag+TAG_HDR_SIZE, extra);
++ if (func(tagType, tagLen, curTag+TAG_HDR_SIZE, extra)) {
++ return -1;
++ }
+ curTag = curTag + TAG_HDR_SIZE + tagLen;
+ }
+ return 0;
+--- a/pppd/plugins/rp-pppoe/discovery.c
++++ b/pppd/plugins/rp-pppoe/discovery.c
+@@ -48,7 +48,7 @@ static char const RCSID[] =
+ *%DESCRIPTION:
+ * If a HostUnique tag is found which matches our PID, sets *extra to 1.
+ ***********************************************************************/
+-void
++int
+ parseForHostUniq(UINT16_t type, UINT16_t len, unsigned char *data,
+ void *extra)
+ {
+@@ -60,6 +60,7 @@ parseForHostUniq(UINT16_t type, UINT16_t
+ *val = 1;
+ }
+ }
++ return 0;
+ }
+
+ /**********************************************************************
+@@ -102,7 +103,7 @@ packetIsForMe(PPPoEConnection *conn, PPP
+ *%DESCRIPTION:
+ * Picks interesting tags out of a PADO packet
+ ***********************************************************************/
+-void
++int
+ parsePADOTags(UINT16_t type, UINT16_t len, unsigned char *data,
+ void *extra)
+ {
+@@ -181,6 +182,7 @@ parsePADOTags(UINT16_t type, UINT16_t le
+ }
+ break;
+ }
++ return 0;
+ }
+
+ /**********************************************************************
+@@ -195,7 +197,7 @@ parsePADOTags(UINT16_t type, UINT16_t le
+ *%DESCRIPTION:
+ * Picks interesting tags out of a PADS packet
+ ***********************************************************************/
+-void
++int
+ parsePADSTags(UINT16_t type, UINT16_t len, unsigned char *data,
+ void *extra)
+ {
+@@ -205,17 +207,21 @@ parsePADSTags(UINT16_t type, UINT16_t le
+ dbglog("PADS: Service-Name: '%.*s'", (int) len, data);
+ break;
+ case TAG_SERVICE_NAME_ERROR:
+- fatal("PADS: Service-Name-Error: %.*s", (int) len, data);
++ error("PADS: Service-Name-Error: %.*s", (int) len, data);
++ return -1;
+ case TAG_AC_SYSTEM_ERROR:
+- fatal("PADS: System-Error: %.*s", (int) len, data);
++ error("PADS: System-Error: %.*s", (int) len, data);
++ return -1;
+ case TAG_GENERIC_ERROR:
+- fatal("PADS: Generic-Error: %.*s", (int) len, data);
++ error("PADS: Generic-Error: %.*s", (int) len, data);
++ return -1;
+ case TAG_RELAY_SESSION_ID:
+ conn->relayId.type = htons(type);
+ conn->relayId.length = htons(len);
+ memcpy(conn->relayId.payload, data, len);
+ break;
+ }
++ return 0;
+ }
+
+ /***********************************************************************
+@@ -532,9 +538,11 @@ waitForPADS(PPPoEConnection *conn, int t
+ /* Is it PADS? */
+ if (packet.code == CODE_PADS) {
+ /* Parse for goodies */
+- parsePacket(&packet, parsePADSTags, conn);
+- conn->discoveryState = STATE_SESSION;
+- break;
++ if (!parsePacket(&packet, parsePADSTags, conn))
++ {
++ conn->discoveryState = STATE_SESSION;
++ break;
++ }
+ }
+ } while (conn->discoveryState != STATE_SESSION);
+
+--- a/pppd/plugins/rp-pppoe/pppoe.h
++++ b/pppd/plugins/rp-pppoe/pppoe.h
+@@ -238,7 +238,7 @@ typedef struct PPPoETagStruct {
+ #define READ_CHUNK 4096
+
+ /* Function passed to parsePacket */
+-typedef void ParseFunc(UINT16_t type,
++typedef int ParseFunc(UINT16_t type,
+ UINT16_t len,
+ unsigned char *data,
+ void *extra);