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Add icmp handling / replying

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This commit is contained in:
Nico Schottelius 2019-04-03 10:52:25 +02:00
commit d87b897069
5 changed files with 58 additions and 11 deletions
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32
p4src/static-mapping.p4
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@ -225,9 +225,9 @@ Echo or Echo Reply Message
}
/********************** ICMP6 + NDP ***********************************/
/********************** ICMP6 + NDP + ICMP ***********************************/
/* old/unused action */
/* old/unused action -- is it??*/
action icmp6_answer() {
if(hdr.icmp6.isValid()) {
if(hdr.icmp6.code == ICMP6_ECHO_REQUEST) {
@ -299,7 +299,28 @@ Echo or Echo Reply Message
}
size = ICMP6_TABLE_SIZE;
default_action = controller_debug_table_id(TABLE_ICMP6);
// default_action = NoAction;
}
action icmp_echo_reply() {
ipv4_addr_t tmp = hdr.ipv4.src_addr;
hdr.icmp.type = ICMP_ECHO_REPLY;
hdr.ipv4.src_addr = hdr.ipv4.dst_addr;
hdr.ipv4.dst_addr = tmp;
}
table icmp {
key = {
hdr.ipv4.dst_addr: lpm;
hdr.icmp.type: exact;
}
actions = {
icmp_echo_reply;
controller_debug_table_id;
NoAction;
}
size = ICMP_TABLE_SIZE;
default_action = controller_debug_table_id(TABLE_ICMP);
}
/********************** debugging / general support ***********************************/
@ -440,7 +461,10 @@ Echo or Echo Reply Message
v6_networks.apply(); /* regular egress / routing */
} else if(hdr.ipv4.isValid()) {
if(nat46.apply().hit) {
if(icmp.apply().hit()) {
v4_networks.apply();
exit;
} else if(nat46.apply().hit) {
if(hdr.icmp.isValid()) {
nat46_icmp_generic();