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Add rate limitation for SCTP OOTB responses.

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MFC after: 3 days
This commit is contained in:
Michael Tuexen 2012-06-18 17:11:24 +00:00
parent 285052f0aa
commit 5ad9e57b3f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=237230
3 changed files with 5 additions and 10 deletions
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3
sys/netinet/icmp_var.h
View File

@ -102,7 +102,8 @@ extern int badport_bandlim(int);
#define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */
#define BANDLIM_RST_OPENPORT 4 /* No connection, listener */
#define BANDLIM_ICMP6_UNREACH 5
#define BANDLIM_MAX 5
#define BANDLIM_SCTP_OOTB 6
#define BANDLIM_MAX 6
#endif
#endif

3
sys/netinet/ip_icmp.c
View File

@ -965,7 +965,8 @@ badport_bandlim(int which)
{ "icmp tstamp response" },
{ "closed port RST response" },
{ "open port RST response" },
{ "icmp6 unreach response" }
{ "icmp6 unreach response" },
{ "sctp ootb response" }
};
/*

9
sys/netinet/sctp_input.c
View File

@ -6060,15 +6060,8 @@ sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
struct sctp_init_chunk *init_chk, chunk_buf;
SCTP_STAT_INCR(sctps_noport);
#ifdef ICMP_BANDLIM
/*
* we use the bandwidth limiting to protect against sending
* too many ABORTS all at once. In this case these count the
* same as an ICMP message.
*/
if (badport_bandlim(0) < 0)
if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0)
goto bad;
#endif /* ICMP_BANDLIM */
SCTPDBG(SCTP_DEBUG_INPUT1,
"Sending a ABORT from packet entry!\n");
if (ch->chunk_type == SCTP_INITIATION) {