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Bugfix: if a SYN is received in the SYN_RCVD state we should not send a blank SYN, but a SYNACK in response.

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Adam Dunkels 2013-11-22 15:37:21 +01:00
parent 6265219775
commit f31d6f271f
1 changed files with 6 additions and 2 deletions
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8
core/net/uip6.c
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@ -1833,8 +1833,12 @@ uip_process(uint8_t flag)
UIP_TCP_BUF->seqno[2] != uip_connr->rcv_nxt[2] ||
UIP_TCP_BUF->seqno[3] != uip_connr->rcv_nxt[3])) {
if(UIP_TCP_BUF->flags & TCP_SYN) {
goto tcp_send_synack;
if((UIP_TCP_BUF->flags & TCP_SYN)) {
if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_SYN_RCVD) {
goto tcp_send_synack;
} else if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_SYN_SENT) {
goto tcp_send_syn;
}
}
goto tcp_send_ack;
}