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Use linux ephemeral range (start from 32768). More TCP debug

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cpq committed 2023-02-09 15:20:08 +00:00
1 parent 12f00d785d
commit b6fc67fff2
3 files changed
+292 -16
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src/tcpip/tcpip.c
+7 -8
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@@ -2,7 +2,7 @@
#if MG_ENABLE_TCPIP
#define MIP_EPHEMERAL_PORT 49152
#define MG_EPHEMERAL_PORT_BASE 32768
#define PDIFF(a, b) ((size_t) (((char *) (b)) - ((char *) (a))))
#ifndef MIP_TCP_KEEPALIVE_MS
@@ -483,6 +483,9 @@ static size_t tx_tcp(struct mg_tcpip_if *ifp, uint8_t *dst_mac, uint32_t dst_ip,
cs = csumup(cs, &ip->dst, sizeof(ip->dst));
cs = csumup(cs, pseudo, sizeof(pseudo));
tcp->csum = csumfin(cs);
MG_DEBUG(("TCP %M:%hu -> %M:%hu fl %x len %u", mg_print_ip4, &ip->src,
mg_ntohs(tcp->sport), mg_print_ip4, &ip->dst, mg_ntohs(tcp->dport),
tcp->flags, (int) len));
return ether_output(ifp, PDIFF(ifp->tx.ptr, tcp + 1) + len);
}
@@ -853,12 +856,8 @@ void mg_tcpip_init(struct mg_mgr *mgr, struct mg_tcpip_if *ifp) {
mgr->extraconnsize = sizeof(struct connstate);
if (ifp->ip == 0) ifp->enable_dhcp_client = true;
memset(ifp->gwmac, 255, sizeof(ifp->gwmac)); // Set to broadcast
// Randomise initial ephemeral port
uint16_t jitter;
mg_random(&jitter, sizeof(jitter));
ifp->eport = MIP_EPHEMERAL_PORT +
(uint16_t) (jitter % (0xffffu - MIP_EPHEMERAL_PORT));
mg_random(&ifp->eport, sizeof(ifp->eport)); // Randomise the initial
ifp->eport += MG_EPHEMERAL_PORT_BASE; // ephemeral port
}
}
@@ -884,7 +883,7 @@ static void send_syn(struct mg_connection *c) {
void mg_connect_resolved(struct mg_connection *c) {
struct mg_tcpip_if *ifp = (struct mg_tcpip_if *) c->mgr->priv;
c->is_resolving = 0;
if (ifp->eport < MIP_EPHEMERAL_PORT) ifp->eport = MIP_EPHEMERAL_PORT;
if (ifp->eport < MG_EPHEMERAL_PORT_BASE) ifp->eport = MG_EPHEMERAL_PORT_BASE;
c->loc.ip = ifp->ip;
c->loc.port = mg_htons(ifp->eport++);
MG_DEBUG(("%lu %M -> %M", c->id, mg_print_ip_port, &c->loc, mg_print_ip_port,