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fixed bug in analyzers that caused looping analyzers and exceptions

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This commit is contained in:
Joakim Eriksson 2011-09-05 19:43:47 +02:00
parent f7a3a8476f
commit fef1e9b686
4 changed files with 27 additions and 27 deletions
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2
tools/cooja/java/se/sics/cooja/plugins/analyzers/ICMPv6Analyzer.java
View file

@ -95,6 +95,6 @@ public class ICMPv6Analyzer extends PacketAnalyzer {
@Override
public boolean matchPacket(Packet packet) {
return packet.level == NETWORK_LEVEL && packet.lastDispatch == ICMPv6_DISPATCH;
return packet.level == APPLICATION_LEVEL && packet.lastDispatch == ICMPv6_DISPATCH;
}
}

47
tools/cooja/java/se/sics/cooja/plugins/analyzers/IPHCPacketAnalyzer.java
View file

@ -61,8 +61,9 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
private static final int IPHC_DISPATCH = 0x60;
/* packet must be on network level && have a IPHC dispatch */
public boolean matchPacket(Packet packet) {
return (packet.get(0) & 0xe0) == IPHC_DISPATCH;
return packet.level == NETWORK_LEVEL && (packet.get(0) & 0xe0) == IPHC_DISPATCH;
}
public int analyzePacket(Packet packet, StringBuffer brief,
@ -83,6 +84,8 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
int sci = 0;
int dci = 0;
String error = null;
brief.append("IPHC");
/* need to decompress while analyzing - add that later... */
@ -106,12 +109,14 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
int len = 0;
int proto = 0;
int ttl = 0;
byte[] srcAddress = null;
byte[] destAddress = null;
byte[] srcAddress = new byte[16];
byte[] destAddress = new byte[16];
int srcPort = 0;
int destPort = 0;
try {
/* Traffic class and flow label */
if((packet.get(0) & SICSLOWPAN_IPHC_FL_C) == 0) {
/* Flow label are carried inline */
@ -180,7 +185,6 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
break;
case SICSLOWPAN_IPHC_SAM_01: /* 64 bits */
/* copy prefix from context */
srcAddress = new byte[16];
System.arraycopy(context, 0, srcAddress, 0, 8);
/* copy IID from packet */
packet.copy(hc06_ptr, srcAddress, 8, 8);
@ -188,7 +192,6 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
break;
case SICSLOWPAN_IPHC_SAM_10: /* 16 bits */
/* unicast address */
srcAddress = new byte[16];
System.arraycopy(context, 0, srcAddress, 0, 8);
/* copy 6 NULL bytes then 2 last bytes of IID */
packet.copy(hc06_ptr, srcAddress, 14, 2);
@ -196,7 +199,6 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
break;
case SICSLOWPAN_IPHC_SAM_11: /* 0-bits */
/* copy prefix from context */
srcAddress = new byte[16];
System.arraycopy(context, 0, srcAddress, 0, 8);
/* infer IID from L2 address */
System.arraycopy(packet.llsender, 0, srcAddress,
@ -209,12 +211,10 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
switch(packet.get(1) & SICSLOWPAN_IPHC_SAM_11) {
case SICSLOWPAN_IPHC_SAM_00: /* 128 bits */
/* copy whole address from packet */
srcAddress = new byte[16];
packet.copy(hc06_ptr, srcAddress, 0, 16);
hc06_ptr += 16;
break;
case SICSLOWPAN_IPHC_SAM_01: /* 64 bits */
srcAddress = new byte[16];
srcAddress[0] = (byte) 0xfe;
srcAddress[1] = (byte) 0x80;
/* copy IID from packet */
@ -222,7 +222,6 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
hc06_ptr += 8;
break;
case SICSLOWPAN_IPHC_SAM_10: /* 16 bits */
srcAddress = new byte[16];
srcAddress[0] = (byte) 0xfe;
srcAddress[1] = (byte) 0x80;
packet.copy(hc06_ptr, srcAddress, 14, 2);
@ -230,7 +229,6 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
break;
case SICSLOWPAN_IPHC_SAM_11: /* 0 bits */
/* setup link-local address */
srcAddress = new byte[16];
srcAddress[0] = (byte) 0xfe;
srcAddress[1] = (byte) 0x80;
/* infer IID from L2 address */
@ -252,26 +250,22 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
switch (packet.get(1) & SICSLOWPAN_IPHC_DAM_11) {
case SICSLOWPAN_IPHC_DAM_00: /* 128 bits */
/* copy whole address from packet */
destAddress = new byte[16];
packet.copy(hc06_ptr, destAddress, 0, 16);
hc06_ptr += 16;
break;
case SICSLOWPAN_IPHC_DAM_01: /* 48 bits FFXX::00XX:XXXX:XXXX */
destAddress = new byte[16];
destAddress[0] = (byte) 0xff;
destAddress[1] = packet.get(hc06_ptr);
packet.copy(hc06_ptr + 1, destAddress, 11, 5);
hc06_ptr += 6;
break;
case SICSLOWPAN_IPHC_DAM_10: /* 32 bits FFXX::00XX:XXXX */
destAddress = new byte[16];
destAddress[0] = (byte) 0xff;
destAddress[1] = packet.get(hc06_ptr);
packet.copy(hc06_ptr + 1, destAddress, 13, 3);
hc06_ptr += 4;
break;
case SICSLOWPAN_IPHC_DAM_11: /* 8 bits FF02::00XX */
destAddress = new byte[16];
destAddress[0] = (byte) 0xff;
destAddress[1] = (byte) 0x02;
destAddress[15] = packet.get(hc06_ptr);
@ -287,7 +281,6 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
switch (packet.get(1) & SICSLOWPAN_IPHC_DAM_11) {
case SICSLOWPAN_IPHC_DAM_01: /* 64 bits */
destAddress = new byte[16];
System.arraycopy(context, 0, destAddress, 0, 8);
/* copy IID from packet */
packet.copy(hc06_ptr, destAddress, 8, 8);
@ -295,7 +288,6 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
break;
case SICSLOWPAN_IPHC_DAM_10: /* 16 bits */
/* unicast address */
destAddress = new byte[16];
System.arraycopy(context, 0, destAddress, 0, 8);
/* copy IID from packet */
packet.copy(hc06_ptr, destAddress, 14, 2);
@ -303,7 +295,6 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
break;
case SICSLOWPAN_IPHC_DAM_11: /* 0 bits */
/* unicast address */
destAddress = new byte[16];
System.arraycopy(context, 0, destAddress, 0, 8);
/* infer IID from L2 address */
System.arraycopy(packet.llreceiver, 0, destAddress,
@ -314,26 +305,22 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
/* not context based => link local M = 0, DAC = 0 - same as SAC */
switch (packet.get(1) & SICSLOWPAN_IPHC_DAM_11) {
case SICSLOWPAN_IPHC_DAM_00: /* 128 bits */
destAddress = new byte[16];
packet.copy(hc06_ptr, destAddress, 0, 16);
hc06_ptr += 16;
break;
case SICSLOWPAN_IPHC_DAM_01: /* 64 bits */
destAddress = new byte[16];
destAddress[0] = (byte) 0xfe;
destAddress[1] = (byte) 0x80;
packet.copy(hc06_ptr, destAddress, 8, 8);
hc06_ptr += 8;
break;
case SICSLOWPAN_IPHC_DAM_10: /* 16 bits */
destAddress = new byte[16];
destAddress[0] = (byte) 0xfe;
destAddress[1] = (byte) 0x80;
packet.copy(hc06_ptr, destAddress, 14, 2);
hc06_ptr += 2;
break;
case SICSLOWPAN_IPHC_DAM_11: /* 0 bits */
destAddress = new byte[16];
destAddress[0] = (byte) 0xfe;
destAddress[1] = (byte) 0x80;
System.arraycopy(packet.llreceiver, 0, destAddress,
@ -376,7 +363,6 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
}
}
packet.pos += hc06_ptr;
// /* IP length field. */
// if(ip_len == 0) {
@ -396,6 +382,12 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
/*--------------------------------------------- */
} catch (Exception e) {
// some kind of unexpected error...
error = " error during IPHC parsing: " + e.getMessage();
}
packet.pos += hc06_ptr;
String protoStr = "" + proto;
if (proto == PROTO_ICMP) {
protoStr = "ICMPv6";
@ -408,10 +400,17 @@ public class IPHCPacketAnalyzer extends PacketAnalyzer {
printAddress(verbose, srcAddress);
verbose.append(" to ");
printAddress(verbose, destAddress);
if (error != null) verbose.append(" " + error);
packet.lastDispatch = (byte) (proto & 0xff);
packet.level = NETWORK_LEVEL;
return ANALYSIS_OK_CONTINUE;
if (proto == PROTO_UDP || proto == PROTO_ICMP ||
proto == PROTO_TCP) {
packet.level = APPLICATION_LEVEL;
return ANALYSIS_OK_CONTINUE;
} else {
packet.level = NETWORK_LEVEL;
return ANALYSIS_OK_CONTINUE;
}
}
public static void printAddress(StringBuffer out, byte[] address) {

4
tools/cooja/java/se/sics/cooja/plugins/analyzers/IPv6PacketAnalyzer.java
View file

@ -16,7 +16,7 @@ public class IPv6PacketAnalyzer extends PacketAnalyzer {
private static final int IPV6_DISPATCH = 0x41;
public boolean matchPacket(Packet packet) {
return packet.get(0) == IPV6_DISPATCH;
return packet.level == NETWORK_LEVEL && packet.get(0) == IPV6_DISPATCH;
}
public int analyzePacket(Packet packet, StringBuffer brief,
@ -63,7 +63,7 @@ public class IPv6PacketAnalyzer extends PacketAnalyzer {
printAddress(verbose, destAddress);
packet.lastDispatch = (byte) (proto & 0xff);
packet.level = NETWORK_LEVEL;
packet.level = APPLICATION_LEVEL;
return ANALYSIS_OK_CONTINUE;
}

1
tools/cooja/java/se/sics/cooja/plugins/analyzers/PacketAnalyzer.java
View file

@ -9,6 +9,7 @@ public abstract class PacketAnalyzer {
public static final int RADIO_LEVEL = 0;
public static final int MAC_LEVEL = 1;
public static final int NETWORK_LEVEL = 2;
public static final int APPLICATION_LEVEL = 3;
public static class Packet {
byte[] data;