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tcp: fix receival of resets

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Matheus
2025-11-12 17:20:24 -03:00
parent 36bec0427a
commit 4658b57c3e
1 changed files with 6 additions and 1 deletions
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kernel-src/io/net/tcp.c
+6 -1
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@@ -908,13 +908,18 @@ __attribute__((noreturn)) static void tcp_worker() {
continue; continue;
} }
if (seqinrange(tcpheader->seq, tcpheader->seq + 1, tcb->rcvnext, tcb->rcvnext + tcb->rcvwindow) && (tcpheader->control & CONTROL_RST) && tcb->state != TCB_STATE_LISTEN) { // resets have different requirements based on the state of the connection.
// if the state is not *syn sent*, it must fall within the window to bee accepted
if ((tcpheader->control & CONTROL_RST) && tcb->state != TCB_STATE_LISTEN && (
(tcb->state == TCB_STATE_SYNSENT) ||
(seqinrange(tcpheader->seq, tcpheader->seq + 1, tcb->rcvnext, tcb->rcvnext + tcb->rcvwindow)))) {
tcp_reset(tcb); tcp_reset(tcb);
MUTEX_RELEASE(&tcb->mutex); MUTEX_RELEASE(&tcb->mutex);
TCB_RELEASE(tcb); TCB_RELEASE(tcb);
continue; continue;
} }
switch (tcb->state) { switch (tcb->state) {
case TCB_STATE_LISTEN: { case TCB_STATE_LISTEN: {
// (listening socket only) // (listening socket only)