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tcp_output: Clear FIN if tcp_m_copym truncates output length

Browse source 
Reviewed by:	rscheff, tuexen, gallatin
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D46824

(cherry picked from commit 519981e3c09c2875b136635459c87ab24d3104e2)
This commit is contained in:
John Baldwin 2024-10-02 15:12:37 -04:00
parent 09cfc202bc
commit 1a264ff0cc
1 changed files with 5 additions and 0 deletions
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5
sys/netinet/tcp_output.c
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@ -1088,13 +1088,18 @@ send:
sbsndptr_adv(&so->so_snd, mb, len);
m->m_len += len;
} else {
int32_t old_len;
if (SEQ_LT(tp->snd_nxt, tp->snd_max))
msb = NULL;
else
msb = &so->so_snd;
old_len = len;
m->m_next = tcp_m_copym(mb, moff,
&len, if_hw_tsomaxsegcount,
if_hw_tsomaxsegsize, msb, hw_tls);
if (old_len != len)
flags &= ~TH_FIN;
if (len <= (tp->t_maxseg - optlen)) {
/*
* Must have ran out of mbufs for the copy