diff options
Diffstat (limited to 'sys/netinet')
| -rw-r--r-- | sys/netinet/tcp_subr.c | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c index cf7565a..770dce3 100644 --- a/sys/netinet/tcp_subr.c +++ b/sys/netinet/tcp_subr.c @@ -111,14 +111,50 @@ __FBSDID("$FreeBSD$"); #include <security/mac/mac_framework.h> int tcp_mssdflt = TCP_MSS; -SYSCTL_INT(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt, CTLFLAG_RW, - &tcp_mssdflt, 0, "Default TCP Maximum Segment Size"); - #ifdef INET6 int tcp_v6mssdflt = TCP6_MSS; -SYSCTL_INT(_net_inet_tcp, TCPCTL_V6MSSDFLT, v6mssdflt, - CTLFLAG_RW, &tcp_v6mssdflt , 0, - "Default TCP Maximum Segment Size for IPv6"); +#endif + +static int +sysctl_net_inet_tcp_mss_check(SYSCTL_HANDLER_ARGS) +{ + int error, new; + + new = tcp_mssdflt; + error = sysctl_handle_int(oidp, &new, 0, req); + if (error == 0 && req->newptr) { + if (new < TCP_MINMSS) + error = EINVAL; + else + tcp_mssdflt = new; + } + return (error); +} + +SYSCTL_PROC(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt, CTLTYPE_INT|CTLFLAG_RW, + &tcp_mssdflt, 0, &sysctl_net_inet_tcp_mss_check, "I", + "Default TCP Maximum Segment Size"); + +#ifdef INET6 +static int +sysctl_net_inet_tcp_mss_v6_check(SYSCTL_HANDLER_ARGS) +{ + int error, new; + + new = tcp_v6mssdflt; + error = sysctl_handle_int(oidp, &new, 0, req); + if (error == 0 && req->newptr) { + if (new < TCP_MINMSS) + error = EINVAL; + else + tcp_v6mssdflt = new; + } + return (error); +} + +SYSCTL_PROC(_net_inet_tcp, TCPCTL_V6MSSDFLT, v6mssdflt, CTLTYPE_INT|CTLFLAG_RW, + &tcp_v6mssdflt, 0, &sysctl_net_inet_tcp_mss_v6_check, "I", + "Default TCP Maximum Segment Size for IPv6"); #endif /* |
