#include <linux/dccp.h>
#include <linux/icmp.h>
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/random.h>
#include "feat.h"
/*
- * This is the global socket data structure used for responding to
+ * The per-net dccp.v4_ctl_sk socket is used for responding to
* the Out-of-the-blue (OOTB) packets. A control sock will be created
* for this socket at the initialization time.
*/
-static struct socket *dccp_v4_ctl_socket;
-
-static int dccp_v4_get_port(struct sock *sk, const unsigned short snum)
-{
- return inet_csk_get_port(&dccp_hashinfo, sk, snum,
- inet_csk_bind_conflict);
-}
int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
nexthop = inet->opt->faddr;
}
- tmp = ip_route_connect(&rt, nexthop, inet->saddr,
+ tmp = ip_route_connect(&rt, nexthop, inet->inet_saddr,
RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
IPPROTO_DCCP,
- inet->sport, usin->sin_port, sk);
+ inet->inet_sport, usin->sin_port, sk, 1);
if (tmp < 0)
return tmp;
if (inet->opt == NULL || !inet->opt->srr)
daddr = rt->rt_dst;
- if (inet->saddr == 0)
- inet->saddr = rt->rt_src;
- inet->rcv_saddr = inet->saddr;
+ if (inet->inet_saddr == 0)
+ inet->inet_saddr = rt->rt_src;
+ inet->inet_rcv_saddr = inet->inet_saddr;
- inet->dport = usin->sin_port;
- inet->daddr = daddr;
+ inet->inet_dport = usin->sin_port;
+ inet->inet_daddr = daddr;
inet_csk(sk)->icsk_ext_hdr_len = 0;
if (inet->opt != NULL)
if (err != 0)
goto failure;
- err = ip_route_newports(&rt, IPPROTO_DCCP, inet->sport, inet->dport,
- sk);
+ err = ip_route_newports(&rt, IPPROTO_DCCP, inet->inet_sport,
+ inet->inet_dport, sk);
if (err != 0)
goto failure;
/* OK, now commit destination to socket. */
sk_setup_caps(sk, &rt->u.dst);
- dp->dccps_iss = secure_dccp_sequence_number(inet->saddr, inet->daddr,
- inet->sport, inet->dport);
- inet->id = dp->dccps_iss ^ jiffies;
+ dp->dccps_iss = secure_dccp_sequence_number(inet->inet_saddr,
+ inet->inet_daddr,
+ inet->inet_sport,
+ inet->inet_dport);
+ inet->inet_id = dp->dccps_iss ^ jiffies;
err = dccp_connect(sk);
rt = NULL;
dccp_set_state(sk, DCCP_CLOSED);
ip_rt_put(rt);
sk->sk_route_caps = 0;
- inet->dport = 0;
+ inet->inet_dport = 0;
goto out;
}
/* We don't check in the destentry if pmtu discovery is forbidden
* on this route. We just assume that no packet_to_big packets
* are send back when pmtu discovery is not active.
- * There is a small race when the user changes this flag in the
+ * There is a small race when the user changes this flag in the
* route, but I think that's acceptable.
*/
if ((dst = __sk_dst_check(sk, 0)) == NULL)
static 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 u8 offset = iph->ihl << 2;
+ const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset);
struct dccp_sock *dp;
struct inet_sock *inet;
- const int type = skb->h.icmph->type;
- const int code = skb->h.icmph->code;
+ const int type = icmp_hdr(skb)->type;
+ const int code = icmp_hdr(skb)->code;
struct sock *sk;
__u64 seq;
int err;
+ struct net *net = dev_net(skb->dev);
- if (skb->len < (iph->ihl << 2) + 8) {
- ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
+ if (skb->len < offset + sizeof(*dh) ||
+ skb->len < offset + __dccp_basic_hdr_len(dh)) {
+ ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
return;
}
- sk = inet_lookup(&dccp_hashinfo, iph->daddr, dh->dccph_dport,
- iph->saddr, dh->dccph_sport, inet_iif(skb));
+ sk = inet_lookup(net, &dccp_hashinfo,
+ iph->daddr, dh->dccph_dport,
+ iph->saddr, dh->dccph_sport, inet_iif(skb));
if (sk == NULL) {
- ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
+ ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
return;
}
* servers this needs to be solved differently.
*/
if (sock_owned_by_user(sk))
- NET_INC_STATS_BH(LINUX_MIB_LOCKDROPPEDICMPS);
+ NET_INC_STATS_BH(net, LINUX_MIB_LOCKDROPPEDICMPS);
if (sk->sk_state == DCCP_CLOSED)
goto out;
dp = dccp_sk(sk);
- seq = dccp_hdr_seq(skb);
- if (sk->sk_state != DCCP_LISTEN &&
- !between48(seq, dp->dccps_swl, dp->dccps_swh)) {
- NET_INC_STATS(LINUX_MIB_OUTOFWINDOWICMPS);
+ seq = dccp_hdr_seq(dh);
+ if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_LISTEN) &&
+ !between48(seq, dp->dccps_awl, dp->dccps_awh)) {
+ NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS);
goto out;
}
* ICMPs are not backlogged, hence we cannot get an established
* socket here.
*/
- BUG_TRAP(!req->sk);
+ WARN_ON(req->sk);
if (seq != dccp_rsk(req)->dreq_iss) {
- NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS);
+ NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS);
goto out;
}
/*
return csum_tcpudp_magic(src, dst, skb->len, IPPROTO_DCCP, skb->csum);
}
-void dccp_v4_send_check(struct sock *sk, int unused, struct sk_buff *skb)
+void dccp_v4_send_check(struct sock *sk, struct sk_buff *skb)
{
const struct inet_sock *inet = inet_sk(sk);
struct dccp_hdr *dh = dccp_hdr(skb);
dccp_csum_outgoing(skb);
- dh->dccph_checksum = dccp_v4_csum_finish(skb, inet->saddr, inet->daddr);
+ dh->dccph_checksum = dccp_v4_csum_finish(skb,
+ inet->inet_saddr,
+ inet->inet_daddr);
}
EXPORT_SYMBOL_GPL(dccp_v4_send_check);
static inline u64 dccp_v4_init_sequence(const struct sk_buff *skb)
{
- return secure_dccp_sequence_number(skb->nh.iph->daddr,
- skb->nh.iph->saddr,
+ return secure_dccp_sequence_number(ip_hdr(skb)->daddr,
+ ip_hdr(skb)->saddr,
dccp_hdr(skb)->dccph_dport,
dccp_hdr(skb)->dccph_sport);
}
{
struct inet_request_sock *ireq;
struct inet_sock *newinet;
- struct dccp_sock *newdp;
struct sock *newsk;
if (sk_acceptq_is_full(sk))
sk_setup_caps(newsk, dst);
- newdp = dccp_sk(newsk);
newinet = inet_sk(newsk);
ireq = inet_rsk(req);
- newinet->daddr = ireq->rmt_addr;
- newinet->rcv_saddr = ireq->loc_addr;
- newinet->saddr = ireq->loc_addr;
+ newinet->inet_daddr = ireq->rmt_addr;
+ newinet->inet_rcv_saddr = ireq->loc_addr;
+ newinet->inet_saddr = ireq->loc_addr;
newinet->opt = ireq->opt;
ireq->opt = NULL;
newinet->mc_index = inet_iif(skb);
- newinet->mc_ttl = skb->nh.iph->ttl;
- newinet->id = jiffies;
+ newinet->mc_ttl = ip_hdr(skb)->ttl;
+ newinet->inet_id = jiffies;
dccp_sync_mss(newsk, dst_mtu(dst));
- __inet_hash(&dccp_hashinfo, newsk, 0);
- __inet_inherit_port(&dccp_hashinfo, sk, newsk);
+ __inet_hash_nolisten(newsk, NULL);
+ __inet_inherit_port(sk, newsk);
return newsk;
exit_overflow:
- NET_INC_STATS_BH(LINUX_MIB_LISTENOVERFLOWS);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
exit:
- NET_INC_STATS_BH(LINUX_MIB_LISTENDROPS);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
dst_release(dst);
return NULL;
}
static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
{
const struct dccp_hdr *dh = dccp_hdr(skb);
- const struct iphdr *iph = skb->nh.iph;
+ const struct iphdr *iph = ip_hdr(skb);
struct sock *nsk;
struct request_sock **prev;
/* Find possible connection requests. */
if (req != NULL)
return dccp_check_req(sk, skb, req, prev);
- nsk = inet_lookup_established(&dccp_hashinfo,
+ nsk = inet_lookup_established(sock_net(sk), &dccp_hashinfo,
iph->saddr, dh->dccph_sport,
iph->daddr, dh->dccph_dport,
inet_iif(skb));
return sk;
}
-static struct dst_entry* dccp_v4_route_skb(struct sock *sk,
+static struct dst_entry* dccp_v4_route_skb(struct net *net, struct sock *sk,
struct sk_buff *skb)
{
struct rtable *rt;
- struct flowi fl = { .oif = ((struct rtable *)skb->dst)->rt_iif,
+ struct flowi fl = { .oif = skb_rtable(skb)->rt_iif,
.nl_u = { .ip4_u =
- { .daddr = skb->nh.iph->saddr,
- .saddr = skb->nh.iph->daddr,
+ { .daddr = ip_hdr(skb)->saddr,
+ .saddr = ip_hdr(skb)->daddr,
.tos = RT_CONN_FLAGS(sk) } },
.proto = sk->sk_protocol,
.uli_u = { .ports =
{ .sport = dccp_hdr(skb)->dccph_dport,
.dport = dccp_hdr(skb)->dccph_sport }
- }
+ }
};
security_skb_classify_flow(skb, &fl);
- if (ip_route_output_flow(&rt, &fl, sk, 0)) {
- IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
+ if (ip_route_output_flow(net, &rt, &fl, sk, 0)) {
+ IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
return NULL;
}
}
static int dccp_v4_send_response(struct sock *sk, struct request_sock *req,
- struct dst_entry *dst)
+ struct request_values *rv_unused)
{
int err = -1;
struct sk_buff *skb;
+ struct dst_entry *dst;
- /* First, grab a route. */
-
- if (dst == NULL && (dst = inet_csk_route_req(sk, req)) == NULL)
+ dst = inet_csk_route_req(sk, req);
+ if (dst == NULL)
goto out;
skb = dccp_make_response(sk, dst, req);
dh->dccph_checksum = dccp_v4_csum_finish(skb, ireq->loc_addr,
ireq->rmt_addr);
- memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr,
ireq->rmt_addr,
ireq->opt);
static void dccp_v4_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
{
int err;
- struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh;
- const int dccp_hdr_reset_len = sizeof(struct dccp_hdr) +
- sizeof(struct dccp_hdr_ext) +
- sizeof(struct dccp_hdr_reset);
+ const struct iphdr *rxiph;
struct sk_buff *skb;
struct dst_entry *dst;
- u64 seqno = 0;
+ struct net *net = dev_net(skb_dst(rxskb)->dev);
+ struct sock *ctl_sk = net->dccp.v4_ctl_sk;
/* Never send a reset in response to a reset. */
- if (rxdh->dccph_type == DCCP_PKT_RESET)
+ if (dccp_hdr(rxskb)->dccph_type == DCCP_PKT_RESET)
return;
- if (((struct rtable *)rxskb->dst)->rt_type != RTN_LOCAL)
+ if (skb_rtable(rxskb)->rt_type != RTN_LOCAL)
return;
- dst = dccp_v4_route_skb(dccp_v4_ctl_socket->sk, rxskb);
+ dst = dccp_v4_route_skb(net, ctl_sk, rxskb);
if (dst == NULL)
return;
- skb = alloc_skb(dccp_v4_ctl_socket->sk->sk_prot->max_header,
- GFP_ATOMIC);
+ skb = dccp_ctl_make_reset(ctl_sk, rxskb);
if (skb == NULL)
goto out;
- /* Reserve space for headers. */
- skb_reserve(skb, dccp_v4_ctl_socket->sk->sk_prot->max_header);
- skb->dst = dst_clone(dst);
-
- dh = dccp_zeroed_hdr(skb, dccp_hdr_reset_len);
-
- /* Build DCCP header and checksum it. */
- dh->dccph_type = DCCP_PKT_RESET;
- dh->dccph_sport = rxdh->dccph_dport;
- 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;
+ rxiph = ip_hdr(rxskb);
+ dccp_hdr(skb)->dccph_checksum = dccp_v4_csum_finish(skb, rxiph->saddr,
+ rxiph->daddr);
+ skb_dst_set(skb, dst_clone(dst));
- /* See "8.3.1. Abnormal Termination" in RFC 4340 */
- if (DCCP_SKB_CB(rxskb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
- dccp_set_seqno(&seqno, DCCP_SKB_CB(rxskb)->dccpd_ack_seq + 1);
-
- dccp_hdr_set_seq(dh, seqno);
- dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), DCCP_SKB_CB(rxskb)->dccpd_seq);
-
- dccp_csum_outgoing(skb);
- dh->dccph_checksum = dccp_v4_csum_finish(skb, rxskb->nh.iph->saddr,
- rxskb->nh.iph->daddr);
-
- bh_lock_sock(dccp_v4_ctl_socket->sk);
- err = ip_build_and_send_pkt(skb, dccp_v4_ctl_socket->sk,
- rxskb->nh.iph->daddr,
- rxskb->nh.iph->saddr, NULL);
- bh_unlock_sock(dccp_v4_ctl_socket->sk);
+ bh_lock_sock(ctl_sk);
+ err = ip_build_and_send_pkt(skb, ctl_sk,
+ rxiph->daddr, rxiph->saddr, NULL);
+ bh_unlock_sock(ctl_sk);
if (net_xmit_eval(err) == 0) {
DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
static void dccp_v4_reqsk_destructor(struct request_sock *req)
{
+ dccp_feat_list_purge(&dccp_rsk(req)->dreq_featneg);
kfree(inet_rsk(req)->opt);
}
struct inet_request_sock *ireq;
struct request_sock *req;
struct dccp_request_sock *dreq;
- const __be32 service = dccp_hdr_request(skb)->dccph_req_service;
+ const __be32 service = dccp_hdr_request(skb)->dccph_req_service;
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
- __u8 reset_code = DCCP_RESET_CODE_TOO_BUSY;
/* Never answer to DCCP_PKT_REQUESTs send to broadcast or multicast */
- if (((struct rtable *)skb->dst)->rt_flags &
- (RTCF_BROADCAST | RTCF_MULTICAST)) {
- reset_code = DCCP_RESET_CODE_NO_CONNECTION;
- goto drop;
- }
+ if (skb_rtable(skb)->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))
+ return 0; /* discard, don't send a reset here */
if (dccp_bad_service_code(sk, service)) {
- reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE;
+ dcb->dccpd_reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE;
goto drop;
- }
+ }
/*
* TW buckets are converted to open requests without
* limitations, they conserve resources and peer is
* evidently real one.
*/
+ dcb->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY;
if (inet_csk_reqsk_queue_is_full(sk))
goto drop;
if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
goto drop;
- req = reqsk_alloc(&dccp_request_sock_ops);
+ req = inet_reqsk_alloc(&dccp_request_sock_ops);
if (req == NULL)
goto drop;
- if (dccp_parse_options(sk, skb))
+ if (dccp_reqsk_init(req, dccp_sk(sk), skb))
goto drop_and_free;
- dccp_reqsk_init(req, skb);
+ dreq = dccp_rsk(req);
+ if (dccp_parse_options(sk, dreq, skb))
+ goto drop_and_free;
if (security_inet_conn_request(sk, skb, req))
goto drop_and_free;
ireq = inet_rsk(req);
- ireq->loc_addr = skb->nh.iph->daddr;
- ireq->rmt_addr = skb->nh.iph->saddr;
- ireq->opt = NULL;
+ ireq->loc_addr = ip_hdr(skb)->daddr;
+ ireq->rmt_addr = ip_hdr(skb)->saddr;
- /*
+ /*
* Step 3: Process LISTEN state
*
* Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie
* In fact we defer setting S.GSR, S.SWL, S.SWH to
* dccp_create_openreq_child.
*/
- dreq = dccp_rsk(req);
dreq->dreq_isr = dcb->dccpd_seq;
dreq->dreq_iss = dccp_v4_init_sequence(skb);
dreq->dreq_service = service;
reqsk_free(req);
drop:
DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
- dcb->dccpd_reset_code = reset_code;
return -1;
}
/* If the packet is shorter than 12 bytes, drop packet and return */
if (!pskb_may_pull(skb, sizeof(struct dccp_hdr))) {
- LIMIT_NETDEBUG(KERN_WARNING "DCCP: pskb_may_pull failed\n");
+ DCCP_WARN("pskb_may_pull failed\n");
return 1;
}
/* If P.type is not understood, drop packet and return */
if (dh->dccph_type >= DCCP_PKT_INVALID) {
- LIMIT_NETDEBUG(KERN_WARNING "DCCP: invalid packet type\n");
+ DCCP_WARN("invalid packet type\n");
return 1;
}
* If P.Data Offset is too small for packet type, drop packet and return
*/
if (dh->dccph_doff < dccp_hdr_len(skb) / sizeof(u32)) {
- LIMIT_NETDEBUG(KERN_WARNING "DCCP: P.Data Offset(%u) "
- "too small\n", dh->dccph_doff);
+ DCCP_WARN("P.Data Offset(%u) too small\n", dh->dccph_doff);
return 1;
}
/*
* If P.Data Offset is too too large for packet, drop packet and return
*/
if (!pskb_may_pull(skb, dh->dccph_doff * sizeof(u32))) {
- LIMIT_NETDEBUG(KERN_WARNING "DCCP: P.Data Offset(%u) "
- "too large\n", dh->dccph_doff);
+ DCCP_WARN("P.Data Offset(%u) too large\n", dh->dccph_doff);
return 1;
}
* If P.type is not Data, Ack, or DataAck and P.X == 0 (the packet
* has short sequence numbers), drop packet and return
*/
- if (dh->dccph_type >= DCCP_PKT_DATA &&
- dh->dccph_type <= DCCP_PKT_DATAACK && dh->dccph_x == 0) {
- LIMIT_NETDEBUG(KERN_WARNING "DCCP: P.type (%s) not Data||Ack||"
- "DataAck, while P.X == 0\n",
- dccp_packet_name(dh->dccph_type));
+ if ((dh->dccph_type < DCCP_PKT_DATA ||
+ dh->dccph_type > DCCP_PKT_DATAACK) && dh->dccph_x == 0) {
+ DCCP_WARN("P.type (%s) not Data || [Data]Ack, while P.X == 0\n",
+ dccp_packet_name(dh->dccph_type));
return 1;
}
*/
cscov = dccp_csum_coverage(skb);
if (cscov > skb->len) {
- LIMIT_NETDEBUG(KERN_WARNING
- "DCCP: P.CsCov %u exceeds packet length %d\n",
- dh->dccph_cscov, skb->len);
+ DCCP_WARN("P.CsCov %u exceeds packet length %d\n",
+ dh->dccph_cscov, skb->len);
return 1;
}
static int dccp_v4_rcv(struct sk_buff *skb)
{
const struct dccp_hdr *dh;
+ const struct iphdr *iph;
struct sock *sk;
int min_cov;
if (dccp_invalid_packet(skb))
goto discard_it;
+ iph = ip_hdr(skb);
/* Step 1: If header checksum is incorrect, drop packet and return */
- if (dccp_v4_csum_finish(skb, skb->nh.iph->saddr, skb->nh.iph->daddr)) {
- LIMIT_NETDEBUG(KERN_WARNING
- "%s: dropped packet with invalid checksum\n",
- __FUNCTION__);
+ if (dccp_v4_csum_finish(skb, iph->saddr, iph->daddr)) {
+ DCCP_WARN("dropped packet with invalid checksum\n");
goto discard_it;
}
dh = dccp_hdr(skb);
- DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb);
+ DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(dh);
DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;
- dccp_pr_debug("%8.8s "
- "src=%u.%u.%u.%u@%-5d "
- "dst=%u.%u.%u.%u@%-5d seq=%llu",
+ dccp_pr_debug("%8.8s src=%pI4@%-5d dst=%pI4@%-5d seq=%llu",
dccp_packet_name(dh->dccph_type),
- NIPQUAD(skb->nh.iph->saddr), ntohs(dh->dccph_sport),
- NIPQUAD(skb->nh.iph->daddr), ntohs(dh->dccph_dport),
+ &iph->saddr, ntohs(dh->dccph_sport),
+ &iph->daddr, ntohs(dh->dccph_dport),
(unsigned long long) DCCP_SKB_CB(skb)->dccpd_seq);
if (dccp_packet_without_ack(skb)) {
}
/* Step 2:
- * Look up flow ID in table and get corresponding socket */
- sk = __inet_lookup(&dccp_hashinfo,
- skb->nh.iph->saddr, dh->dccph_sport,
- skb->nh.iph->daddr, dh->dccph_dport,
- inet_iif(skb));
-
- /*
+ * Look up flow ID in table and get corresponding socket */
+ sk = __inet_lookup_skb(&dccp_hashinfo, skb,
+ dh->dccph_sport, dh->dccph_dport);
+ /*
* Step 2:
- * If no socket ...
+ * If no socket ...
*/
if (sk == NULL) {
dccp_pr_debug("failed to look up flow ID in table and "
goto no_dccp_socket;
}
- /*
+ /*
* Step 2:
- * ... or S.state == TIMEWAIT,
+ * ... or S.state == TIMEWAIT,
* Generate Reset(No Connection) unless P.type == Reset
* Drop packet and return
*/
/*
* RFC 4340, sec. 9.2.1: Minimum Checksum Coverage
- * o if MinCsCov = 0, only packets with CsCov = 0 are accepted
- * o if MinCsCov > 0, also accept packets with CsCov >= MinCsCov
+ * o if MinCsCov = 0, only packets with CsCov = 0 are accepted
+ * o if MinCsCov > 0, also accept packets with CsCov >= MinCsCov
*/
min_cov = dccp_sk(sk)->dccps_pcrlen;
if (dh->dccph_cscov && (min_cov == 0 || dh->dccph_cscov < min_cov)) {
goto discard_and_relse;
nf_reset(skb);
- return sk_receive_skb(sk, skb);
+ return sk_receive_skb(sk, skb, 1);
no_dccp_socket:
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
goto discard_it;
/*
* Step 2:
- * If no socket ...
+ * If no socket ...
* Generate Reset(No Connection) unless P.type == Reset
* Drop packet and return
*/
goto discard_it;
}
-static struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
+static const struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
.queue_xmit = ip_queue_xmit,
.send_check = dccp_v4_send_check,
.rebuild_header = inet_sk_rebuild_header,
.getsockopt = ip_getsockopt,
.addr2sockaddr = inet_csk_addr2sockaddr,
.sockaddr_len = sizeof(struct sockaddr_in),
+ .bind_conflict = inet_csk_bind_conflict,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_ip_setsockopt,
.compat_getsockopt = compat_ip_getsockopt,
.sendmsg = dccp_sendmsg,
.recvmsg = dccp_recvmsg,
.backlog_rcv = dccp_v4_do_rcv,
- .hash = dccp_hash,
- .unhash = dccp_unhash,
+ .hash = inet_hash,
+ .unhash = inet_unhash,
.accept = inet_csk_accept,
- .get_port = dccp_v4_get_port,
+ .get_port = inet_csk_get_port,
.shutdown = dccp_shutdown,
.destroy = dccp_destroy_sock,
.orphan_count = &dccp_orphan_count,
.max_header = MAX_DCCP_HEADER,
.obj_size = sizeof(struct dccp_sock),
+ .slab_flags = SLAB_DESTROY_BY_RCU,
.rsk_prot = &dccp_request_sock_ops,
.twsk_prot = &dccp_timewait_sock_ops,
+ .h.hashinfo = &dccp_hashinfo,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_dccp_setsockopt,
.compat_getsockopt = compat_dccp_getsockopt,
#endif
};
-static struct net_protocol dccp_v4_protocol = {
+static const struct net_protocol dccp_v4_protocol = {
.handler = dccp_v4_rcv,
.err_handler = dccp_v4_err,
.no_policy = 1,
+ .netns_ok = 1,
};
static const struct proto_ops inet_dccp_ops = {
.protocol = IPPROTO_DCCP,
.prot = &dccp_v4_prot,
.ops = &inet_dccp_ops,
- .capability = -1,
.no_check = 0,
.flags = INET_PROTOSW_ICSK,
};
+static int __net_init dccp_v4_init_net(struct net *net)
+{
+ if (dccp_hashinfo.bhash == NULL)
+ return -ESOCKTNOSUPPORT;
+
+ return inet_ctl_sock_create(&net->dccp.v4_ctl_sk, PF_INET,
+ SOCK_DCCP, IPPROTO_DCCP, net);
+}
+
+static void __net_exit dccp_v4_exit_net(struct net *net)
+{
+ inet_ctl_sock_destroy(net->dccp.v4_ctl_sk);
+}
+
+static struct pernet_operations dccp_v4_ops = {
+ .init = dccp_v4_init_net,
+ .exit = dccp_v4_exit_net,
+};
+
static int __init dccp_v4_init(void)
{
int err = proto_register(&dccp_v4_prot, 1);
inet_register_protosw(&dccp_v4_protosw);
- err = inet_csk_ctl_sock_create(&dccp_v4_ctl_socket, PF_INET,
- SOCK_DCCP, IPPROTO_DCCP);
+ err = register_pernet_subsys(&dccp_v4_ops);
if (err)
- goto out_unregister_protosw;
+ goto out_destroy_ctl_sock;
out:
return err;
-out_unregister_protosw:
+out_destroy_ctl_sock:
inet_unregister_protosw(&dccp_v4_protosw);
inet_del_protocol(&dccp_v4_protocol, IPPROTO_DCCP);
out_proto_unregister:
static void __exit dccp_v4_exit(void)
{
+ unregister_pernet_subsys(&dccp_v4_ops);
inet_unregister_protosw(&dccp_v4_protosw);
inet_del_protocol(&dccp_v4_protocol, IPPROTO_DCCP);
proto_unregister(&dccp_v4_prot);
* values directly, Also cover the case where the protocol is not specified,
* i.e. net-pf-PF_INET-proto-0-type-SOCK_DCCP
*/
-MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-33-type-6");
-MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-0-type-6");
+MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET, 33, 6);
+MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET, 0, 6);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff