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tc: m_csum: add support for SCTP checksum 

'sctp' parameter can now be used as 'csum' target to enable CRC32c
computation on SCTP packets.

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
This commit is contained in:
Davide Caratti 2017-01-20 11:10:10 +01:00 committed by Stephen Hemminger
parent a044b36af3
commit 6561cb28f2
2 changed files with 13 additions and 5 deletions
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7
man/man8/tc-csum.8
View File

@ -19,6 +19,7 @@ csum - checksum update action
.BR tcp " |" .BR tcp " |"
.BR udp " |" .BR udp " |"
.BR udplite " |" .BR udplite " |"
.BR sctp " |"
.IR SWEETS " }" .IR SWEETS " }"
.ti -8 .ti -8
@ -43,9 +44,11 @@ IGMP header
TCP header TCP header
.RB ( tcp ), .RB ( tcp ),
UDP header UDP header
.RB ( udp ") or" .RB ( udp ),
UDPLite header UDPLite header
.RB ( udplite ). .RB ( udplite ") or"
SCTP header
.RB ( sctp ).
.TP .TP
.B SWEETS .B SWEETS
These are merely syntactic sugar and ignored internally. These are merely syntactic sugar and ignored internally.

11
tc/m_csum.c
View File

@ -24,7 +24,7 @@ explain(void)
{ {
fprintf(stderr, "Usage: ... csum <UPDATE>\n" fprintf(stderr, "Usage: ... csum <UPDATE>\n"
"Where: UPDATE := <TARGET> [<UPDATE>]\n" "Where: UPDATE := <TARGET> [<UPDATE>]\n"
" TARGET := { ip4h | icmp | igmp | tcp | udp | udplite | <SWEETS> }\n" " TARGET := { ip4h | icmp | igmp | tcp | udp | udplite | sctp | <SWEETS> }\n"
" SWEETS := { and | or | \'+\' }\n"); " SWEETS := { and | or | \'+\' }\n");
} }
@ -65,6 +65,9 @@ parse_csum_args(int *argc_p, char ***argv_p, struct tc_csum *sel)
else if (matches(*argv, "udplite") == 0) else if (matches(*argv, "udplite") == 0)
sel->update_flags |= TCA_CSUM_UPDATE_FLAG_UDPLITE; sel->update_flags |= TCA_CSUM_UPDATE_FLAG_UDPLITE;
else if (matches(*argv, "sctp") == 0)
sel->update_flags |= TCA_CSUM_UPDATE_FLAG_SCTP;
else if ((matches(*argv, "and") == 0) || else if ((matches(*argv, "and") == 0) ||
(matches(*argv, "or") == 0) || (matches(*argv, "or") == 0) ||
(matches(*argv, "+") == 0)) (matches(*argv, "+") == 0))
@ -160,6 +163,7 @@ print_csum(struct action_util *au, FILE *f, struct rtattr *arg)
char *uflag_4 = ""; char *uflag_4 = "";
char *uflag_5 = ""; char *uflag_5 = "";
char *uflag_6 = ""; char *uflag_6 = "";
char *uflag_7 = "";
int uflag_count = 0; int uflag_count = 0;
@ -191,13 +195,14 @@ print_csum(struct action_util *au, FILE *f, struct rtattr *arg)
CSUM_UFLAG_BUFFER(uflag_4, TCA_CSUM_UPDATE_FLAG_TCP, "tcp"); CSUM_UFLAG_BUFFER(uflag_4, TCA_CSUM_UPDATE_FLAG_TCP, "tcp");
CSUM_UFLAG_BUFFER(uflag_5, TCA_CSUM_UPDATE_FLAG_UDP, "udp"); CSUM_UFLAG_BUFFER(uflag_5, TCA_CSUM_UPDATE_FLAG_UDP, "udp");
CSUM_UFLAG_BUFFER(uflag_6, TCA_CSUM_UPDATE_FLAG_UDPLITE, "udplite"); CSUM_UFLAG_BUFFER(uflag_6, TCA_CSUM_UPDATE_FLAG_UDPLITE, "udplite");
CSUM_UFLAG_BUFFER(uflag_7, TCA_CSUM_UPDATE_FLAG_SCTP, "sctp");
if (!uflag_count) { if (!uflag_count) {
uflag_1 = "?empty"; uflag_1 = "?empty";
} }
fprintf(f, "csum (%s%s%s%s%s%s) action %s\n", fprintf(f, "csum (%s%s%s%s%s%s%s) action %s\n",
uflag_1, uflag_2, uflag_3, uflag_1, uflag_2, uflag_3,
uflag_4, uflag_5, uflag_6, uflag_4, uflag_5, uflag_6, uflag_7,
action_n2a(sel->action)); action_n2a(sel->action));
fprintf(f, "\tindex %u ref %d bind %d", sel->index, sel->refcnt, fprintf(f, "\tindex %u ref %d bind %d", sel->index, sel->refcnt,
sel->bindcnt); sel->bindcnt);