d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Do not have the MTU table twice in the code. Therefore move the

Browse Source 
function from the timer code to util, rename it appropriately and
also fix a bug in sctp_get_prev_mtu(), where calling it with a
value existing in the MTU table did not return a smaller one.

MFC after: 3 days.
This commit is contained in:
Michael Tuexen 2010-11-07 18:50:35 +00:00
parent 228a253795
commit 437fc91ae6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=214939
4 changed files with 36 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
sys/netinet/sctp_timer.c
View File

@ -1670,46 +1670,6 @@ sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
return (0);
}
#define SCTP_NUMBER_OF_MTU_SIZES 18
static uint32_t mtu_sizes[] = {
68,
296,
508,
512,
544,
576,
1006,
1492,
1500,
1536,
2002,
2048,
4352,
4464,
8166,
17914,
32000,
65535
};
static uint32_t
sctp_getnext_mtu(struct sctp_inpcb *inp, uint32_t cur_mtu)
{
/* select another MTU that is just bigger than this one */
int i;
for (i = 0; i < SCTP_NUMBER_OF_MTU_SIZES; i++) {
if (cur_mtu < mtu_sizes[i]) {
/* no max_mtu is bigger than this one */
return (mtu_sizes[i]);
}
}
/* here return the highest allowable */
return (cur_mtu);
}
void
sctp_pathmtu_timer(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
@ -1717,7 +1677,7 @@ sctp_pathmtu_timer(struct sctp_inpcb *inp,
{
uint32_t next_mtu, mtu;
next_mtu = sctp_getnext_mtu(inp, net->mtu);
next_mtu = sctp_get_next_mtu(inp, net->mtu);
if ((next_mtu > net->mtu) && (net->port == 0)) {
if ((net->src_addr_selected == 0) ||

2
sys/netinet/sctp_usrreq.c
View File

@ -194,7 +194,7 @@ sctp_notify_mbuf(struct sctp_inpcb *inp,
* mtu is. Rats we will have to guess (in a educated fashion
* of course)
*/
nxtsz = find_next_best_mtu(totsz);
nxtsz = sctp_get_prev_mtu(totsz);
}
/* Stop any PMTU timer */
if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {

49
sys/netinet/sctputil.c
View File

@ -50,8 +50,6 @@ __FBSDID("$FreeBSD$");
#include <netinet/sctp_cc_functions.h>
#include <netinet/sctp_bsd_addr.h>
#define NUMBER_OF_MTU_SIZES 18
#ifndef KTR_SCTP
#define KTR_SCTP KTR_SUBSYS
@ -753,7 +751,7 @@ sctp_stop_timers_for_shutdown(struct sctp_tcb *stcb)
* a list of sizes based on typical mtu's, used only if next hop size not
* returned.
*/
static int sctp_mtu_sizes[] = {
static uint32_t sctp_mtu_sizes[] = {
68,
296,
508,
@ -774,25 +772,42 @@ static int sctp_mtu_sizes[] = {
65535
};
int
find_next_best_mtu(int totsz)
/*
* Return the largest MTU smaller than val. If there is no
* entry, just return val.
*/
uint32_t
sctp_get_prev_mtu(uint32_t val)
{
int i, perfer;
uint32_t i;
/*
* if we are in here we must find the next best fit based on the
* size of the dg that failed to be sent.
*/
perfer = 0;
for (i = 0; i < NUMBER_OF_MTU_SIZES; i++) {
if (totsz < sctp_mtu_sizes[i]) {
perfer = i - 1;
if (perfer < 0)
perfer = 0;
if (val <= sctp_mtu_sizes[0]) {
return (val);
}
for (i = 1; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
if (val <= sctp_mtu_sizes[i]) {
break;
}
}
return (sctp_mtu_sizes[perfer]);
return (sctp_mtu_sizes[i - 1]);
}
/*
* Return the smallest MTU larger than val. If there is no
* entry, just return val.
*/
uint32_t
sctp_get_next_mtu(struct sctp_inpcb *inp, uint32_t val)
{
/* select another MTU that is just bigger than this one */
uint32_t i;
for (i = 0; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
if (val < sctp_mtu_sizes[i]) {
return (sctp_mtu_sizes[i]);
}
}
return (val);
}
void

3
sys/netinet/sctputil.h
View File

@ -124,7 +124,8 @@ sctp_append_to_readq(struct sctp_inpcb *inp,
void sctp_iterator_worker(void);
int find_next_best_mtu(int);
uint32_t sctp_get_prev_mtu(uint32_t);
uint32_t sctp_get_next_mtu(struct sctp_inpcb *, uint32_t);
void
sctp_timeout_handler(void *);