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Remove kernel handling of ICMP_SOURCEQUENCH.

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It hasn't been used for a very long time.
Additionally, it was deprecated by RFC 6633.
This commit is contained in:
Alexander V. Chernikov 2014-11-10 23:10:01 +00:00
parent 6435a0dc1b
commit d1f79a3bfc
6 changed files with 3 additions and 51 deletions
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1
sys/netinet/ip_fastfwd.c
View File

@ -502,7 +502,6 @@ ip_fastforward(struct mbuf *m)
if ((ifp->if_snd.ifq_len + ip_len / ifp->if_mtu + 1) >=
ifp->if_snd.ifq_maxlen) {
IPSTAT_INC(ips_odropped);
/* would send source quench here but that is depreciated */
goto drop;
}
#endif

7
sys/netinet/ip_icmp.c
View File

@ -486,12 +486,6 @@ icmp_input(struct mbuf **mp, int *offp, int proto)
if (code > 1)
goto badcode;
code = PRC_PARAMPROB;
goto deliver;
case ICMP_SOURCEQUENCH:
if (code)
goto badcode;
code = PRC_QUENCH;
deliver:
/*
* Problem with datagram; advise higher level routines.
@ -670,6 +664,7 @@ icmp_input(struct mbuf **mp, int *offp, int proto)
case ICMP_TSTAMPREPLY:
case ICMP_IREQREPLY:
case ICMP_MASKREPLY:
case ICMP_SOURCEQUENCH:
default:
break;
}

25
sys/netinet/ip_input.c
View File

@ -104,12 +104,6 @@ SYSCTL_INT(_net_inet_ip, IPCTL_SENDREDIRECTS, redirect, CTLFLAG_VNET | CTLFLAG_R
&VNET_NAME(ipsendredirects), 0,
"Enable sending IP redirects");
static VNET_DEFINE(int, ip_sendsourcequench);
#define V_ip_sendsourcequench VNET(ip_sendsourcequench)
SYSCTL_INT(_net_inet_ip, OID_AUTO, sendsourcequench, CTLFLAG_VNET | CTLFLAG_RW,
&VNET_NAME(ip_sendsourcequench), 0,
"Enable the transmission of source quench packets");
VNET_DEFINE(int, ip_do_randomid);
SYSCTL_INT(_net_inet_ip, OID_AUTO, random_id, CTLFLAG_VNET | CTLFLAG_RW,
&VNET_NAME(ip_do_randomid), 0,
@ -1647,25 +1641,6 @@ ip_forward(struct mbuf *m, int srcrt)
break;
case ENOBUFS:
/*
* A router should not generate ICMP_SOURCEQUENCH as
* required in RFC1812 Requirements for IP Version 4 Routers.
* Source quench could be a big problem under DoS attacks,
* or if the underlying interface is rate-limited.
* Those who need source quench packets may re-enable them
* via the net.inet.ip.sendsourcequench sysctl.
*/
if (V_ip_sendsourcequench == 0) {
m_freem(mcopy);
if (ia != NULL)
ifa_free(&ia->ia_ifa);
return;
} else {
type = ICMP_SOURCEQUENCH;
code = 0;
}
break;
case EACCES: /* ipfw denied packet */
m_freem(mcopy);
if (ia != NULL)

8
sys/netinet/tcp_subr.c
View File

@ -1429,11 +1429,6 @@ tcp_ctlinput(int cmd, struct sockaddr *sa, void *vip)
*/
else if (PRC_IS_REDIRECT(cmd))
return;
/*
* Source quench is depreciated.
*/
else if (cmd == PRC_QUENCH)
return;
/*
* Hostdead is ugly because it goes linearly through all PCBs.
* XXX: We never get this from ICMP, otherwise it makes an
@ -1539,9 +1534,6 @@ tcp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
else if (!PRC_IS_REDIRECT(cmd) &&
((unsigned)cmd >= PRC_NCMDS || inet6ctlerrmap[cmd] == 0))
return;
/* Source quench is depreciated. */
else if (cmd == PRC_QUENCH)
return;
/* if the parameter is from icmp6, decode it. */
if (d != NULL) {

4
sys/sys/protosw.h
View File

@ -274,8 +274,8 @@ int pru_sopoll_notsupp(struct socket *so, int events, struct ucred *cred,
#define PRC_IFDOWN 0 /* interface transition */
#define PRC_ROUTEDEAD 1 /* select new route if possible ??? */
#define PRC_IFUP 2 /* interface has come back up */
#define PRC_QUENCH2 3 /* DEC congestion bit says slow down */
#define PRC_QUENCH 4 /* some one said to slow down */
/* was PRC_QUENCH2 3 DEC congestion bit says slow down */
/* was PRC_QUENCH 4 Deprecated by RFC 6633 */
#define PRC_MSGSIZE 5 /* message size forced drop */
#define PRC_HOSTDEAD 6 /* host appears to be down */
#define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */

9
tools/tools/sysdoc/tunables.mdoc
View File

@ -1346,15 +1346,6 @@ See
.Xr inet 4
for more information.
---
net.inet.ip.sendsourcequench
bool
This
.Nm
enables or disables the transmission of
source quench packets.
---
net.inet.ip.sourceroute
bool