diff options
Diffstat (limited to 'sys/netinet/tcp_subr.c')
| -rw-r--r-- | sys/netinet/tcp_subr.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c index 22a5e26..39acf62 100644 --- a/sys/netinet/tcp_subr.c +++ b/sys/netinet/tcp_subr.c @@ -1252,7 +1252,7 @@ tcp_ctlinput(int cmd, struct sockaddr *sa, void *vip) * or route MTU. tcp_mtudisc() * will do right thing by itself. */ - if (mtu <= tcp_maxmtu(&inc)) + if (mtu <= tcp_maxmtu(&inc, NULL)) tcp_hc_updatemtu(&inc, mtu); } @@ -1531,9 +1531,9 @@ tcp_mtudisc(struct inpcb *inp, int errno) maxmtu = tcp_hc_getmtu(&inp->inp_inc); /* IPv4 and IPv6 */ romtu = #ifdef INET6 - isipv6 ? tcp_maxmtu6(&inp->inp_inc) : + isipv6 ? tcp_maxmtu6(&inp->inp_inc, NULL) : #endif /* INET6 */ - tcp_maxmtu(&inp->inp_inc); + tcp_maxmtu(&inp->inp_inc, NULL); if (!maxmtu) maxmtu = romtu; else @@ -1610,7 +1610,7 @@ tcp_mtudisc(struct inpcb *inp, int errno) * to get the interface MTU. */ u_long -tcp_maxmtu(struct in_conninfo *inc) +tcp_maxmtu(struct in_conninfo *inc, int *flags) { struct route sro; struct sockaddr_in *dst; @@ -1633,6 +1633,13 @@ tcp_maxmtu(struct in_conninfo *inc) maxmtu = ifp->if_mtu; else maxmtu = min(sro.ro_rt->rt_rmx.rmx_mtu, ifp->if_mtu); + + /* Report additional interface capabilities. */ + if (flags != NULL) { + if (ifp->if_capenable & IFCAP_TSO4 && + ifp->if_hwassist & CSUM_TSO) + *flags |= CSUM_TSO; + } RTFREE(sro.ro_rt); } return (maxmtu); @@ -1640,7 +1647,7 @@ tcp_maxmtu(struct in_conninfo *inc) #ifdef INET6 u_long -tcp_maxmtu6(struct in_conninfo *inc) +tcp_maxmtu6(struct in_conninfo *inc, int *flags) { struct route_in6 sro6; struct ifnet *ifp; @@ -1662,6 +1669,13 @@ tcp_maxmtu6(struct in_conninfo *inc) else maxmtu = min(sro6.ro_rt->rt_rmx.rmx_mtu, IN6_LINKMTU(sro6.ro_rt->rt_ifp)); + + /* Report additional interface capabilities. */ + if (flags != NULL) { + if (ifp->if_capenable & IFCAP_TSO6 && + ifp->if_hwassist & CSUM_TSO) + *flags |= CSUM_TSO; + } RTFREE(sro6.ro_rt); } |
