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Consolidate and improve error checks for missing source MAC. See #2711

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dmiller
2026-01-28 21:36:15 +00:00
parent a5b332ccd2
commit c1d16550dc
8 changed files with 61 additions and 49 deletions
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25
FPEngine.cc
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@@ -2493,29 +2493,8 @@ size_t FPPacket::getLength() const {
* Otherwise, pass the source address, the next hop address and the name of
* the network interface the packet should be injected through. */
int FPPacket::setEthernet(const Target *target) {
const char *devname = target->deviceName();
this->link_eth = false;
if (devname != NULL) {
netutil_eth_t *ethsd = eth_open_cached(devname);
if (ethsd == NULL) {
error("%s: Failed to open ethernet device (%s)", __func__, devname);
}
else if (netutil_eth_can_send(ethsd)) {
this->link_eth = true;
Strncpy(this->eth_hdr.devname, devname, sizeof(this->eth_hdr.devname));
if (netutil_eth_datalink(ethsd) == DLT_EN10MB){
const u8 *src_mac = target->SrcMACAddress();
const u8 *dst_mac = target->NextHopMACAddress();
if (src_mac == NULL || dst_mac == NULL) {
this->link_eth = false;
}
else {
memcpy(this->eth_hdr.srcmac, src_mac, 6);
memcpy(this->eth_hdr.dstmac, dst_mac, 6);
}
}
}
}
eth_nfo *eth = target->FillEthNfo(&this->eth_hdr, NULL);
this->link_eth = (eth != NULL);
if (!this->link_eth) {
memset(&(this->eth_hdr), 0, sizeof(struct eth_nfo));