bool icmpv4_matches(const struct probe_s * _probe, const struct probe_s * _reply)
{
uint8_t reply_type = 0,
reply_code = 0,
probe_type = 0,
probe_code = 0;
layer_t * icmp_layer = NULL;
const probe_t * probe = (const probe_t *) _probe;
const probe_t * reply = (const probe_t *) _reply;
if (probe_extract(reply, "type", &reply_type)
&& probe_extract(probe, "type", &probe_type)
&& probe_extract(probe, "code", &probe_code)) {
if (reply_type == ICMP_ECHOREPLY) {
return true;
}
if (!(icmp_layer = probe_get_layer(reply, 3)) || strcmp(icmp_layer->protocol->name, "icmpv4")) {
return false;
}
if (probe_extract_ext(reply, "type", 3, &reply_type) && probe_extract_ext(reply, "code", 3, &reply_code)) {
return (probe_type == reply_type) && (probe_code == reply_code);
}
}
return false;
}
bool probe_extract(const probe_t * probe, const char * name, void * dst) {
field_t * flow_id_field;
// TEMPORARY HACK TO MANAGE flow_id metafield
if (!strcmp(name, "flow_id")) {
if ((flow_id_field = probe_create_metafield(probe, "flow_id")) != NULL) {
memcpy(dst, &flow_id_field->value.int16, sizeof(uint16_t));
field_free(flow_id_field);
return true;
}
return false;
}
return probe_extract_ext(probe, name, 0, dst);
}
static inline bool reply_extract_tag(const probe_t * reply, uint16_t * ptag_reply) {
return probe_extract_ext(reply, "checksum", 3, ptag_reply);
}
static inline bool probe_extract_tag(const probe_t * probe, uint16_t * ptag_probe) {
return probe_extract_ext(probe, "checksum", 1, ptag_probe);
}
