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-rw-r--r--net/netfilter/nf_conntrack_proto_sctp.c140
1 files changed, 72 insertions, 68 deletions
diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
index 9a5ec53b442..689cc505bf6 100644
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -206,28 +206,26 @@ static int do_basic_checks(struct nf_conn *conntrack,
for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
pr_debug("Chunk Num: %d Type: %d\n", count, sch->type);
- if (sch->type == SCTP_CID_INIT
- || sch->type == SCTP_CID_INIT_ACK
- || sch->type == SCTP_CID_SHUTDOWN_COMPLETE) {
+ if (sch->type == SCTP_CID_INIT ||
+ sch->type == SCTP_CID_INIT_ACK ||
+ sch->type == SCTP_CID_SHUTDOWN_COMPLETE)
flag = 1;
- }
/*
* Cookie Ack/Echo chunks not the first OR
* Init / Init Ack / Shutdown compl chunks not the only chunks
* OR zero-length.
*/
- if (((sch->type == SCTP_CID_COOKIE_ACK
- || sch->type == SCTP_CID_COOKIE_ECHO
- || flag)
- && count !=0) || !sch->length) {
+ if (((sch->type == SCTP_CID_COOKIE_ACK ||
+ sch->type == SCTP_CID_COOKIE_ECHO ||
+ flag) &&
+ count != 0) || !sch->length) {
pr_debug("Basic checks failed\n");
return 1;
}
- if (map) {
+ if (map)
set_bit(sch->type, (void *)map);
- }
}
pr_debug("Basic checks passed\n");
@@ -243,39 +241,48 @@ static int new_state(enum ip_conntrack_dir dir,
pr_debug("Chunk type: %d\n", chunk_type);
switch (chunk_type) {
- case SCTP_CID_INIT:
- pr_debug("SCTP_CID_INIT\n");
- i = 0; break;
- case SCTP_CID_INIT_ACK:
- pr_debug("SCTP_CID_INIT_ACK\n");
- i = 1; break;
- case SCTP_CID_ABORT:
- pr_debug("SCTP_CID_ABORT\n");
- i = 2; break;
- case SCTP_CID_SHUTDOWN:
- pr_debug("SCTP_CID_SHUTDOWN\n");
- i = 3; break;
- case SCTP_CID_SHUTDOWN_ACK:
- pr_debug("SCTP_CID_SHUTDOWN_ACK\n");
- i = 4; break;
- case SCTP_CID_ERROR:
- pr_debug("SCTP_CID_ERROR\n");
- i = 5; break;
- case SCTP_CID_COOKIE_ECHO:
- pr_debug("SCTP_CID_COOKIE_ECHO\n");
- i = 6; break;
- case SCTP_CID_COOKIE_ACK:
- pr_debug("SCTP_CID_COOKIE_ACK\n");
- i = 7; break;
- case SCTP_CID_SHUTDOWN_COMPLETE:
- pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n");
- i = 8; break;
- default:
- /* Other chunks like DATA, SACK, HEARTBEAT and
- its ACK do not cause a change in state */
- pr_debug("Unknown chunk type, Will stay in %s\n",
- sctp_conntrack_names[cur_state]);
- return cur_state;
+ case SCTP_CID_INIT:
+ pr_debug("SCTP_CID_INIT\n");
+ i = 0;
+ break;
+ case SCTP_CID_INIT_ACK:
+ pr_debug("SCTP_CID_INIT_ACK\n");
+ i = 1;
+ break;
+ case SCTP_CID_ABORT:
+ pr_debug("SCTP_CID_ABORT\n");
+ i = 2;
+ break;
+ case SCTP_CID_SHUTDOWN:
+ pr_debug("SCTP_CID_SHUTDOWN\n");
+ i = 3;
+ break;
+ case SCTP_CID_SHUTDOWN_ACK:
+ pr_debug("SCTP_CID_SHUTDOWN_ACK\n");
+ i = 4;
+ break;
+ case SCTP_CID_ERROR:
+ pr_debug("SCTP_CID_ERROR\n");
+ i = 5;
+ break;
+ case SCTP_CID_COOKIE_ECHO:
+ pr_debug("SCTP_CID_COOKIE_ECHO\n");
+ i = 6;
+ break;
+ case SCTP_CID_COOKIE_ACK:
+ pr_debug("SCTP_CID_COOKIE_ACK\n");
+ i = 7;
+ break;
+ case SCTP_CID_SHUTDOWN_COMPLETE:
+ pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n");
+ i = 8;
+ break;
+ default:
+ /* Other chunks like DATA, SACK, HEARTBEAT and
+ its ACK do not cause a change in state */
+ pr_debug("Unknown chunk type, Will stay in %s\n",
+ sctp_conntrack_names[cur_state]);
+ return cur_state;
}
pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
@@ -307,12 +314,12 @@ static int sctp_packet(struct nf_conn *conntrack,
return -1;
/* Check the verification tag (Sec 8.5) */
- if (!test_bit(SCTP_CID_INIT, (void *)map)
- && !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, (void *)map)
- && !test_bit(SCTP_CID_COOKIE_ECHO, (void *)map)
- && !test_bit(SCTP_CID_ABORT, (void *)map)
- && !test_bit(SCTP_CID_SHUTDOWN_ACK, (void *)map)
- && (sh->vtag != conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])) {
+ if (!test_bit(SCTP_CID_INIT, (void *)map) &&
+ !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, (void *)map) &&
+ !test_bit(SCTP_CID_COOKIE_ECHO, (void *)map) &&
+ !test_bit(SCTP_CID_ABORT, (void *)map) &&
+ !test_bit(SCTP_CID_SHUTDOWN_ACK, (void *)map) &&
+ sh->vtag != conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)]) {
pr_debug("Verification tag check failed\n");
return -1;
}
@@ -330,24 +337,22 @@ static int sctp_packet(struct nf_conn *conntrack,
}
} else if (sch->type == SCTP_CID_ABORT) {
/* Sec 8.5.1 (B) */
- if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])
- && !(sh->vtag == conntrack->proto.sctp.vtag
- [1 - CTINFO2DIR(ctinfo)])) {
+ if (sh->vtag != conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)] &&
+ sh->vtag != conntrack->proto.sctp.vtag[1 - CTINFO2DIR(ctinfo)]) {
write_unlock_bh(&sctp_lock);
return -1;
}
} else if (sch->type == SCTP_CID_SHUTDOWN_COMPLETE) {
/* Sec 8.5.1 (C) */
- if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])
- && !(sh->vtag == conntrack->proto.sctp.vtag
- [1 - CTINFO2DIR(ctinfo)]
- && (sch->flags & 1))) {
+ if (sh->vtag != conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)] &&
+ sh->vtag != conntrack->proto.sctp.vtag[1 - CTINFO2DIR(ctinfo)] &&
+ (sch->flags & 1)) {
write_unlock_bh(&sctp_lock);
return -1;
}
} else if (sch->type == SCTP_CID_COOKIE_ECHO) {
/* Sec 8.5.1 (D) */
- if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])) {
+ if (sh->vtag != conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)]) {
write_unlock_bh(&sctp_lock);
return -1;
}
@@ -366,15 +371,15 @@ static int sctp_packet(struct nf_conn *conntrack,
}
/* If it is an INIT or an INIT ACK note down the vtag */
- if (sch->type == SCTP_CID_INIT
- || sch->type == SCTP_CID_INIT_ACK) {
+ if (sch->type == SCTP_CID_INIT ||
+ sch->type == SCTP_CID_INIT_ACK) {
sctp_inithdr_t _inithdr, *ih;
ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
sizeof(_inithdr), &_inithdr);
if (ih == NULL) {
- write_unlock_bh(&sctp_lock);
- return -1;
+ write_unlock_bh(&sctp_lock);
+ return -1;
}
pr_debug("Setting vtag %x for dir %d\n",
ih->init_tag, !CTINFO2DIR(ctinfo));
@@ -389,9 +394,9 @@ static int sctp_packet(struct nf_conn *conntrack,
nf_ct_refresh_acct(conntrack, ctinfo, skb, *sctp_timeouts[newconntrack]);
- if (oldsctpstate == SCTP_CONNTRACK_COOKIE_ECHOED
- && CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY
- && newconntrack == SCTP_CONNTRACK_ESTABLISHED) {
+ if (oldsctpstate == SCTP_CONNTRACK_COOKIE_ECHOED &&
+ CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY &&
+ newconntrack == SCTP_CONNTRACK_ESTABLISHED) {
pr_debug("Setting assured bit\n");
set_bit(IPS_ASSURED_BIT, &conntrack->status);
nf_conntrack_event_cache(IPCT_STATUS, skb);
@@ -418,11 +423,10 @@ static int sctp_new(struct nf_conn *conntrack, const struct sk_buff *skb,
return 0;
/* If an OOTB packet has any of these chunks discard (Sec 8.4) */
- if ((test_bit (SCTP_CID_ABORT, (void *)map))
- || (test_bit (SCTP_CID_SHUTDOWN_COMPLETE, (void *)map))
- || (test_bit (SCTP_CID_COOKIE_ACK, (void *)map))) {
+ if (test_bit (SCTP_CID_ABORT, (void *)map) ||
+ test_bit (SCTP_CID_SHUTDOWN_COMPLETE, (void *)map) ||
+ test_bit (SCTP_CID_COOKIE_ACK, (void *)map))
return 0;
- }
newconntrack = SCTP_CONNTRACK_MAX;
for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 21:11:00 +0000