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test checksum primitives, enforce rx frag test

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Sergio R. Caprile committed 2025-07-08 13:57:03 -03:00
1 parent b3ee71acbe
commit 2c7f58aed2
4 files changed
+27 -14
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src/net_builtin.c
+3 -2
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@@ -845,10 +845,11 @@ static void rx_tcp(struct mg_tcpip_if *ifp, struct pkt *pkt) {
static void rx_ip(struct mg_tcpip_if *ifp, struct pkt *pkt) {
uint16_t frag = mg_ntohs(pkt->ip->frag);
if (frag & IP_MORE_FRAGS_MSK || frag & IP_FRAG_OFFSET_MSK) {
struct mg_connection *c = getpeer(ifp->mgr, pkt, false);
if (c) mg_error(c, "Received fragmented packet");
struct mg_connection *c;
if (pkt->ip->proto == 17) pkt->udp = (struct udp *) (pkt->ip + 1);
if (pkt->ip->proto == 6) pkt->tcp = (struct tcp *) (pkt->ip + 1);
c = getpeer(ifp->mgr, pkt, false);
if (c) mg_error(c, "Received fragmented packet");
} else if (pkt->ip->proto == 1) {
pkt->icmp = (struct icmp *) (pkt->ip + 1);
if (pkt->pay.len < sizeof(*pkt->icmp)) return;