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Diffstat (limited to 'net/dccp/ipv4.c')
-rw-r--r--net/dccp/ipv4.c114
1 files changed, 74 insertions, 40 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index d3770aed3b1..42d9c878d4c 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -29,7 +29,7 @@
struct inet_hashinfo __cacheline_aligned dccp_hashinfo = {
.lhash_lock = RW_LOCK_UNLOCKED,
.lhash_users = ATOMIC_INIT(0),
- .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(dccp_hashinfo.lhash_wait),
+ .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(dccp_hashinfo.lhash_wait),
.portalloc_lock = SPIN_LOCK_UNLOCKED,
.port_rover = 1024 - 1,
};
@@ -61,7 +61,8 @@ static int __dccp_v4_check_established(struct sock *sk, const __u16 lport,
const int dif = sk->sk_bound_dev_if;
INET_ADDR_COOKIE(acookie, saddr, daddr)
const __u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
- const int hash = inet_ehashfn(daddr, lport, saddr, inet->dport, dccp_hashinfo.ehash_size);
+ const int hash = inet_ehashfn(daddr, lport, saddr, inet->dport,
+ dccp_hashinfo.ehash_size);
struct inet_ehash_bucket *head = &dccp_hashinfo.ehash[hash];
const struct sock *sk2;
const struct hlist_node *node;
@@ -133,11 +134,12 @@ static int dccp_v4_hash_connect(struct sock *sk)
local_bh_disable();
/* TODO. Actually it is not so bad idea to remove
- * dccp_hashinfo.portalloc_lock before next submission to Linus.
+ * dccp_hashinfo.portalloc_lock before next submission to
+ * Linus.
* As soon as we touch this place at all it is time to think.
*
- * Now it protects single _advisory_ variable dccp_hashinfo.port_rover,
- * hence it is mostly useless.
+ * Now it protects single _advisory_ variable
+ * dccp_hashinfo.port_rover, hence it is mostly useless.
* Code will work nicely if we just delete it, but
* I am afraid in contented case it will work not better or
* even worse: another cpu just will hit the same bucket
@@ -152,7 +154,8 @@ static int dccp_v4_hash_connect(struct sock *sk)
rover++;
if ((rover < low) || (rover > high))
rover = low;
- head = &dccp_hashinfo.bhash[inet_bhashfn(rover, dccp_hashinfo.bhash_size)];
+ head = &dccp_hashinfo.bhash[inet_bhashfn(rover,
+ dccp_hashinfo.bhash_size)];
spin_lock(&head->lock);
/* Does not bother with rcv_saddr checks,
@@ -172,7 +175,8 @@ static int dccp_v4_hash_connect(struct sock *sk)
}
}
- tb = inet_bind_bucket_create(dccp_hashinfo.bind_bucket_cachep, head, rover);
+ tb = inet_bind_bucket_create(dccp_hashinfo.bind_bucket_cachep,
+ head, rover);
if (tb == NULL) {
spin_unlock(&head->lock);
break;
@@ -211,7 +215,8 @@ ok:
goto out;
}
- head = &dccp_hashinfo.bhash[inet_bhashfn(snum, dccp_hashinfo.bhash_size)];
+ head = &dccp_hashinfo.bhash[inet_bhashfn(snum,
+ dccp_hashinfo.bhash_size)];
tb = inet_csk(sk)->icsk_bind_hash;
spin_lock_bh(&head->lock);
if (sk_head(&tb->owners) == sk && sk->sk_bind_node.next == NULL) {
@@ -313,7 +318,9 @@ static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
out:
return err;
failure:
- /* This unhashes the socket and releases the local port, if necessary. */
+ /*
+ * This unhashes the socket and releases the local port, if necessary.
+ */
dccp_set_state(sk, DCCP_CLOSED);
ip_rt_put(rt);
sk->sk_route_caps = 0;
@@ -365,8 +372,9 @@ static inline void dccp_do_pmtu_discovery(struct sock *sk,
/*
* From: draft-ietf-dccp-spec-11.txt
*
- * DCCP-Sync packets are the best choice for upward probing,
- * since DCCP-Sync probes do not risk application data loss.
+ * DCCP-Sync packets are the best choice for upward
+ * probing, since DCCP-Sync probes do not risk application
+ * data loss.
*/
dccp_send_sync(sk, dp->dccps_gsr);
} /* else let the usual retransmit timer handle it */
@@ -405,11 +413,13 @@ static void dccp_v4_ctl_send_ack(struct sk_buff *rxskb)
dh->dccph_x = 1;
dccp_hdr_set_seq(dh, DCCP_SKB_CB(rxskb)->dccpd_ack_seq);
- dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), DCCP_SKB_CB(rxskb)->dccpd_seq);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb),
+ DCCP_SKB_CB(rxskb)->dccpd_seq);
bh_lock_sock(dccp_ctl_socket->sk);
err = ip_build_and_send_pkt(skb, dccp_ctl_socket->sk,
- rxskb->nh.iph->daddr, rxskb->nh.iph->saddr, NULL);
+ rxskb->nh.iph->daddr,
+ rxskb->nh.iph->saddr, NULL);
bh_unlock_sock(dccp_ctl_socket->sk);
if (err == NET_XMIT_CN || err == 0) {
@@ -418,7 +428,8 @@ static void dccp_v4_ctl_send_ack(struct sk_buff *rxskb)
}
}
-static void dccp_v4_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req)
+static void dccp_v4_reqsk_send_ack(struct sk_buff *skb,
+ struct request_sock *req)
{
dccp_v4_ctl_send_ack(skb);
}
@@ -465,7 +476,8 @@ out:
void dccp_v4_err(struct sk_buff *skb, u32 info)
{
const struct iphdr *iph = (struct iphdr *)skb->data;
- const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + (iph->ihl << 2));
+ const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data +
+ (iph->ihl << 2));
struct dccp_sock *dp;
struct inet_sock *inet;
const int type = skb->h.icmph->type;
@@ -605,7 +617,8 @@ out:
sock_put(sk);
}
-extern struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst, enum dccp_reset_codes code);
+extern struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
+ enum dccp_reset_codes code);
int dccp_v4_send_reset(struct sock *sk, enum dccp_reset_codes code)
{
@@ -689,7 +702,8 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
ireq->loc_addr = daddr;
ireq->rmt_addr = saddr;
/* FIXME: Merge Aristeu's option parsing code when ready */
- req->rcv_wnd = 100; /* Fake, option parsing will get the right value */
+ req->rcv_wnd = 100; /* Fake, option parsing will get the
+ right value */
ireq->opt = NULL;
/*
@@ -804,7 +818,8 @@ static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
return sk;
}
-int dccp_v4_checksum(const struct sk_buff *skb, const u32 saddr, const u32 daddr)
+int dccp_v4_checksum(const struct sk_buff *skb, const u32 saddr,
+ const u32 daddr)
{
const struct dccp_hdr* dh = dccp_hdr(skb);
int checksum_len;
@@ -814,11 +829,13 @@ int dccp_v4_checksum(const struct sk_buff *skb, const u32 saddr, const u32 daddr
checksum_len = skb->len;
else {
checksum_len = (dh->dccph_cscov + dh->dccph_x) * sizeof(u32);
- checksum_len = checksum_len < skb->len ? checksum_len : skb->len;
+ checksum_len = checksum_len < skb->len ? checksum_len :
+ skb->len;
}
tmp = csum_partial((unsigned char *)dh, checksum_len, 0);
- return csum_tcpudp_magic(saddr, daddr, checksum_len, IPPROTO_DCCP, tmp);
+ return csum_tcpudp_magic(saddr, daddr, checksum_len,
+ IPPROTO_DCCP, tmp);
}
static int dccp_v4_verify_checksum(struct sk_buff *skb,
@@ -832,10 +849,12 @@ static int dccp_v4_verify_checksum(struct sk_buff *skb,
checksum_len = skb->len;
else {
checksum_len = (dh->dccph_cscov + dh->dccph_x) * sizeof(u32);
- checksum_len = checksum_len < skb->len ? checksum_len : skb->len;
+ checksum_len = checksum_len < skb->len ? checksum_len :
+ skb->len;
}
tmp = csum_partial((unsigned char *)dh, checksum_len, 0);
- return csum_tcpudp_magic(saddr, daddr, checksum_len, IPPROTO_DCCP, tmp) == 0 ? 0 : -1;
+ return csum_tcpudp_magic(saddr, daddr, checksum_len,
+ IPPROTO_DCCP, tmp) == 0 ? 0 : -1;
}
static struct dst_entry* dccp_v4_route_skb(struct sock *sk,
@@ -850,7 +869,9 @@ static struct dst_entry* dccp_v4_route_skb(struct sock *sk,
.proto = sk->sk_protocol,
.uli_u = { .ports =
{ .sport = dccp_hdr(skb)->dccph_dport,
- .dport = dccp_hdr(skb)->dccph_sport } } };
+ .dport = dccp_hdr(skb)->dccph_sport }
+ }
+ };
if (ip_route_output_flow(&rt, &fl, sk, 0)) {
IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
@@ -899,17 +920,20 @@ void dccp_v4_ctl_send_reset(struct sk_buff *rxskb)
dh->dccph_dport = rxdh->dccph_sport;
dh->dccph_doff = dccp_hdr_reset_len / 4;
dh->dccph_x = 1;
- dccp_hdr_reset(skb)->dccph_reset_code = DCCP_SKB_CB(rxskb)->dccpd_reset_code;
+ dccp_hdr_reset(skb)->dccph_reset_code =
+ DCCP_SKB_CB(rxskb)->dccpd_reset_code;
dccp_hdr_set_seq(dh, DCCP_SKB_CB(rxskb)->dccpd_ack_seq);
- dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), DCCP_SKB_CB(rxskb)->dccpd_seq);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb),
+ DCCP_SKB_CB(rxskb)->dccpd_seq);
dh->dccph_checksum = dccp_v4_checksum(skb, rxskb->nh.iph->saddr,
rxskb->nh.iph->daddr);
bh_lock_sock(dccp_ctl_socket->sk);
err = ip_build_and_send_pkt(skb, dccp_ctl_socket->sk,
- rxskb->nh.iph->daddr, rxskb->nh.iph->saddr, NULL);
+ rxskb->nh.iph->daddr,
+ rxskb->nh.iph->saddr, NULL);
bh_unlock_sock(dccp_ctl_socket->sk);
if (err == NET_XMIT_CN || err == 0) {
@@ -933,7 +957,8 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
/*
* Step 3: Process LISTEN state
* If S.state == LISTEN,
- * If P.type == Request or P contains a valid Init Cookie option,
+ * If P.type == Request or P contains a valid Init Cookie
+ * option,
* * Must scan the packet's options to check for an Init
* Cookie. Only the Init Cookie is processed here,
* however; other options are processed in Step 8. This
@@ -950,7 +975,8 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
* Generate Reset(No Connection) unless P.type == Reset
* Drop packet and return
*
- * NOTE: the check for the packet types is done in dccp_rcv_state_process
+ * NOTE: the check for the packet types is done in
+ * dccp_rcv_state_process
*/
if (sk->sk_state == DCCP_LISTEN) {
struct sock *nsk = dccp_v4_hnd_req(sk, skb);
@@ -1007,7 +1033,8 @@ static inline int dccp_invalid_packet(struct sk_buff *skb)
}
if (!pskb_may_pull(skb, dh->dccph_doff * sizeof(u32))) {
- dccp_pr_debug("P.Data Offset(%u) too small 2\n", dh->dccph_doff);
+ dccp_pr_debug("P.Data Offset(%u) too small 2\n",
+ dh->dccph_doff);
return 1;
}
@@ -1021,8 +1048,8 @@ static inline int dccp_invalid_packet(struct sk_buff *skb)
dh->dccph_type != DCCP_PKT_DATA &&
dh->dccph_type != DCCP_PKT_ACK &&
dh->dccph_type != DCCP_PKT_DATAACK) {
- dccp_pr_debug("P.type (%s) not Data, Ack nor DataAck and P.X == 0\n",
- dccp_packet_name(dh->dccph_type));
+ dccp_pr_debug("P.type (%s) not Data, Ack nor DataAck and "
+ "P.X == 0\n", dccp_packet_name(dh->dccph_type));
return 1;
}
@@ -1055,10 +1082,11 @@ int dccp_v4_rcv(struct sk_buff *skb)
* dccp_ackpkts_add, you'll get something like this on a session that
* sends 10 DATA/DATAACK packets:
*
- * dccp_ackpkts_print: 281473596467422 |0,0|3,0|0,0|3,0|0,0|3,0|0,0|3,0|0,1|
+ * ackpkts_print: 281473596467422 |0,0|3,0|0,0|3,0|0,0|3,0|0,0|3,0|0,1|
*
* 0, 0 means: DCCP_ACKPKTS_STATE_RECEIVED, RLE == just this packet
- * 0, 1 means: DCCP_ACKPKTS_STATE_RECEIVED, RLE == two adjacent packets with the same state
+ * 0, 1 means: DCCP_ACKPKTS_STATE_RECEIVED, RLE == two adjacent packets
+ * with the same state
* 3, 0 means: DCCP_ACKPKTS_STATE_NOT_RECEIVED, RLE == just this packet
*
* So...
@@ -1072,10 +1100,12 @@ int dccp_v4_rcv(struct sk_buff *skb)
* 281473596467416 was received
* 281473596467415 was not received
* 281473596467414 was received
- * 281473596467413 was received (this one was the 3way handshake RESPONSE)
+ * 281473596467413 was received (this one was the 3way handshake
+ * RESPONSE)
*
*/
- if (dh->dccph_type == DCCP_PKT_DATA || dh->dccph_type == DCCP_PKT_DATAACK) {
+ if (dh->dccph_type == DCCP_PKT_DATA ||
+ dh->dccph_type == DCCP_PKT_DATAACK) {
static int discard = 0;
if (discard) {
@@ -1170,7 +1200,8 @@ no_dccp_socket:
* Drop packet and return
*/
if (dh->dccph_type != DCCP_PKT_RESET) {
- DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
+ DCCP_SKB_CB(skb)->dccpd_reset_code =
+ DCCP_RESET_CODE_NO_CONNECTION;
dccp_v4_ctl_send_reset(skb);
}
@@ -1196,8 +1227,9 @@ static int dccp_v4_init_sock(struct sock *sk)
dccp_options_init(&dp->dccps_options);
if (dp->dccps_options.dccpo_send_ack_vector) {
- dp->dccps_hc_rx_ackpkts = dccp_ackpkts_alloc(DCCP_MAX_ACK_VECTOR_LEN,
- GFP_KERNEL);
+ dp->dccps_hc_rx_ackpkts =
+ dccp_ackpkts_alloc(DCCP_MAX_ACK_VECTOR_LEN,
+ GFP_KERNEL);
if (dp->dccps_hc_rx_ackpkts == NULL)
return -ENOMEM;
@@ -1211,8 +1243,10 @@ static int dccp_v4_init_sock(struct sock *sk)
* setsockopt(CCIDs-I-want/accept). -acme
*/
if (likely(!dccp_ctl_socket_init)) {
- dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_ccid, sk);
- dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_ccid, sk);
+ dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+ sk);
+ dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+ sk);
if (dp->dccps_hc_rx_ccid == NULL ||
dp->dccps_hc_tx_ccid == NULL) {
ccid_exit(dp->dccps_hc_rx_ccid, sk);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 10:37:25 +0000