diff options
Diffstat (limited to 'freebsd/sys/netinet/tcp_output.c')
| -rw-r--r-- | freebsd/sys/netinet/tcp_output.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/freebsd/sys/netinet/tcp_output.c b/freebsd/sys/netinet/tcp_output.c index 3e024fdb..dc75c68d 100644 --- a/freebsd/sys/netinet/tcp_output.c +++ b/freebsd/sys/netinet/tcp_output.c @@ -933,6 +933,20 @@ send: if (tp->t_flags & TF_NEEDFIN) sendalot = 1; } else { + if (optlen + ipoptlen >= tp->t_maxseg) { + /* + * Since we don't have enough space to put + * the IP header chain and the TCP header in + * one packet as required by RFC 7112, don't + * send it. Also ensure that at least one + * byte of the payload can be put into the + * TCP segment. + */ + SOCKBUF_UNLOCK(&so->so_snd); + error = EMSGSIZE; + sack_rxmit = 0; + goto out; + } len = tp->t_maxseg - optlen - ipoptlen; sendalot = 1; if (dont_sendalot) |