#include <linux/random.h>
#include <net/icmp.h>
+#include <net/inet_common.h>
#include <net/inet_hashtables.h>
#include <net/inet_sock.h>
+#include <net/protocol.h>
#include <net/sock.h>
#include <net/timewait_sock.h>
#include <net/tcp_states.h>
#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
+#include "feat.h"
-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),
-};
-
-EXPORT_SYMBOL_GPL(dccp_hashinfo);
+/*
+ * This is the global socket data structure 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)
{
inet_csk_bind_conflict);
}
-static void dccp_v4_hash(struct sock *sk)
-{
- inet_hash(&dccp_hashinfo, sk);
-}
-
-void dccp_unhash(struct sock *sk)
-{
- inet_unhash(&dccp_hashinfo, sk);
-}
-
-EXPORT_SYMBOL_GPL(dccp_unhash);
-
int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
struct inet_sock *inet = inet_sk(sk);
} /* else let the usual retransmit timer handle it */
}
-static void dccp_v4_ctl_send_ack(struct sk_buff *rxskb)
+static void dccp_v4_reqsk_send_ack(struct sk_buff *rxskb,
+ struct request_sock *req)
{
int err;
struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh;
- const int dccp_hdr_ack_len = sizeof(struct dccp_hdr) +
+ const u32 dccp_hdr_ack_len = sizeof(struct dccp_hdr) +
sizeof(struct dccp_hdr_ext) +
sizeof(struct dccp_hdr_ack_bits);
struct sk_buff *skb;
if (((struct rtable *)rxskb->dst)->rt_type != RTN_LOCAL)
return;
- skb = alloc_skb(MAX_DCCP_HEADER + 15, GFP_ATOMIC);
+ skb = alloc_skb(dccp_v4_ctl_socket->sk->sk_prot->max_header, GFP_ATOMIC);
if (skb == NULL)
return;
/* Reserve space for headers. */
- skb_reserve(skb, MAX_DCCP_HEADER);
+ skb_reserve(skb, dccp_v4_ctl_socket->sk->sk_prot->max_header);
skb->dst = dst_clone(rxskb->dst);
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,
+ 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_ctl_socket->sk);
+ bh_unlock_sock(dccp_v4_ctl_socket->sk);
if (err == NET_XMIT_CN || err == 0) {
DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
}
}
-static void dccp_v4_reqsk_send_ack(struct sk_buff *skb,
- struct request_sock *req)
-{
- dccp_v4_ctl_send_ack(skb);
-}
-
static int dccp_v4_send_response(struct sock *sk, struct request_sock *req,
struct dst_entry *dst)
{
skb = dccp_make_response(sk, dst, req);
if (skb != NULL) {
const struct inet_request_sock *ireq = inet_rsk(req);
+ struct dccp_hdr *dh = dccp_hdr(skb);
+ dh->dccph_checksum = dccp_v4_checksum(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,
* check at all. A more general error queue to queue errors for later handling
* is probably better.
*/
-void dccp_v4_err(struct sk_buff *skb, u32 info)
+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 +
EXPORT_SYMBOL_GPL(dccp_v4_send_check);
-int dccp_v4_send_reset(struct sock *sk, enum dccp_reset_codes code)
-{
- struct sk_buff *skb;
- /*
- * FIXME: what if rebuild_header fails?
- * Should we be doing a rebuild_header here?
- */
- int err = inet_sk_rebuild_header(sk);
-
- if (err != 0)
- return err;
-
- skb = dccp_make_reset(sk, sk->sk_dst_cache, code);
- if (skb != NULL) {
- const struct inet_sock *inet = inet_sk(sk);
-
- memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
- err = ip_build_and_send_pkt(skb, sk,
- inet->saddr, inet->daddr, NULL);
- if (err == NET_XMIT_CN)
- err = 0;
- }
-
- return err;
-}
-
static inline u64 dccp_v4_init_sequence(const struct sock *sk,
const struct sk_buff *skb)
{
struct dccp_sock dp;
struct request_sock *req;
struct dccp_request_sock *dreq;
- const __u32 saddr = skb->nh.iph->saddr;
- const __u32 daddr = skb->nh.iph->daddr;
- const __u32 service = dccp_hdr_request(skb)->dccph_req_service;
+ const __be32 saddr = skb->nh.iph->saddr;
+ const __be32 daddr = skb->nh.iph->daddr;
+ 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;
if (req == NULL)
goto drop;
- /* FIXME: process options */
+ if (dccp_parse_options(sk, skb))
+ goto drop_and_free;
dccp_openreq_init(req, &dp, 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 __be32 saddr,
+ const __be32 daddr)
{
const struct dccp_hdr* dh = dccp_hdr(skb);
int checksum_len;
IPPROTO_DCCP, tmp);
}
+EXPORT_SYMBOL_GPL(dccp_v4_checksum);
+
static int dccp_v4_verify_checksum(struct sk_buff *skb,
- const u32 saddr, const u32 daddr)
+ const __be32 saddr, const __be32 daddr)
{
struct dccp_hdr *dh = dccp_hdr(skb);
int checksum_len;
if (((struct rtable *)rxskb->dst)->rt_type != RTN_LOCAL)
return;
- dst = dccp_v4_route_skb(dccp_ctl_socket->sk, rxskb);
+ dst = dccp_v4_route_skb(dccp_v4_ctl_socket->sk, rxskb);
if (dst == NULL)
return;
- skb = alloc_skb(MAX_DCCP_HEADER + 15, GFP_ATOMIC);
+ skb = alloc_skb(dccp_v4_ctl_socket->sk->sk_prot->max_header,
+ GFP_ATOMIC);
if (skb == NULL)
goto out;
/* Reserve space for headers. */
- skb_reserve(skb, MAX_DCCP_HEADER);
+ skb_reserve(skb, dccp_v4_ctl_socket->sk->sk_prot->max_header);
skb->dst = dst_clone(dst);
skb->h.raw = skb_push(skb, dccp_hdr_reset_len);
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,
+ 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_ctl_socket->sk);
+ bh_unlock_sock(dccp_v4_ctl_socket->sk);
if (err == NET_XMIT_CN || err == 0) {
DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
EXPORT_SYMBOL_GPL(dccp_invalid_packet);
/* this is called when real data arrives */
-int dccp_v4_rcv(struct sk_buff *skb)
+static int dccp_v4_rcv(struct sk_buff *skb)
{
const struct dccp_hdr *dh;
struct sock *sk;
goto no_dccp_socket;
}
-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,
- .conn_request = dccp_v4_conn_request,
- .syn_recv_sock = dccp_v4_request_recv_sock,
- .net_header_len = sizeof(struct iphdr),
- .setsockopt = ip_setsockopt,
- .getsockopt = ip_getsockopt,
- .addr2sockaddr = inet_csk_addr2sockaddr,
- .sockaddr_len = sizeof(struct sockaddr_in),
+static 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,
+ .conn_request = dccp_v4_conn_request,
+ .syn_recv_sock = dccp_v4_request_recv_sock,
+ .net_header_len = sizeof(struct iphdr),
+ .setsockopt = ip_setsockopt,
+ .getsockopt = ip_getsockopt,
+ .addr2sockaddr = inet_csk_addr2sockaddr,
+ .sockaddr_len = sizeof(struct sockaddr_in),
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_ip_setsockopt,
+ .compat_getsockopt = compat_ip_getsockopt,
+#endif
};
-int dccp_v4_init_sock(struct sock *sk)
-{
- struct dccp_sock *dp = dccp_sk(sk);
- struct inet_connection_sock *icsk = inet_csk(sk);
- static int dccp_ctl_socket_init = 1;
-
- dccp_options_init(&dp->dccps_options);
- do_gettimeofday(&dp->dccps_epoch);
-
- if (dp->dccps_options.dccpo_send_ack_vector) {
- dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(DCCP_MAX_ACKVEC_LEN,
- GFP_KERNEL);
- if (dp->dccps_hc_rx_ackvec == NULL)
- return -ENOMEM;
- }
-
- /*
- * FIXME: We're hardcoding the CCID, and doing this at this point makes
- * the listening (master) sock get CCID control blocks, which is not
- * necessary, but for now, to not mess with the test userspace apps,
- * lets leave it here, later the real solution is to do this in a
- * setsockopt(CCIDs-I-want/accept). -acme
- */
- if (likely(!dccp_ctl_socket_init)) {
- dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_rx_ccid,
- sk);
- dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_tx_ccid,
- sk);
- if (dp->dccps_hc_rx_ccid == NULL ||
- dp->dccps_hc_tx_ccid == NULL) {
- ccid_exit(dp->dccps_hc_rx_ccid, sk);
- ccid_exit(dp->dccps_hc_tx_ccid, sk);
- if (dp->dccps_options.dccpo_send_ack_vector) {
- dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
- dp->dccps_hc_rx_ackvec = NULL;
- }
- dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
- return -ENOMEM;
- }
- } else
- dccp_ctl_socket_init = 0;
-
- dccp_init_xmit_timers(sk);
- icsk->icsk_rto = DCCP_TIMEOUT_INIT;
- sk->sk_state = DCCP_CLOSED;
- sk->sk_write_space = dccp_write_space;
- icsk->icsk_af_ops = &dccp_ipv4_af_ops;
- icsk->icsk_sync_mss = dccp_sync_mss;
- dp->dccps_mss_cache = 536;
- dp->dccps_role = DCCP_ROLE_UNDEFINED;
- dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;
-
- return 0;
-}
-
-EXPORT_SYMBOL_GPL(dccp_v4_init_sock);
-
-int dccp_v4_destroy_sock(struct sock *sk)
+static int dccp_v4_init_sock(struct sock *sk)
{
- struct dccp_sock *dp = dccp_sk(sk);
+ static __u8 dccp_v4_ctl_sock_initialized;
+ int err = dccp_init_sock(sk, dccp_v4_ctl_sock_initialized);
- /*
- * DCCP doesn't use sk_write_queue, just sk_send_head
- * for retransmissions
- */
- if (sk->sk_send_head != NULL) {
- kfree_skb(sk->sk_send_head);
- sk->sk_send_head = NULL;
+ if (err == 0) {
+ if (unlikely(!dccp_v4_ctl_sock_initialized))
+ dccp_v4_ctl_sock_initialized = 1;
+ inet_csk(sk)->icsk_af_ops = &dccp_ipv4_af_ops;
}
- /* Clean up a referenced DCCP bind bucket. */
- if (inet_csk(sk)->icsk_bind_hash != NULL)
- inet_put_port(&dccp_hashinfo, sk);
-
- kfree(dp->dccps_service_list);
- dp->dccps_service_list = NULL;
-
- ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
- ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
- if (dp->dccps_options.dccpo_send_ack_vector) {
- dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
- dp->dccps_hc_rx_ackvec = NULL;
- }
- ccid_exit(dp->dccps_hc_rx_ccid, sk);
- ccid_exit(dp->dccps_hc_tx_ccid, sk);
- dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
-
- return 0;
+ return err;
}
-EXPORT_SYMBOL_GPL(dccp_v4_destroy_sock);
-
static void dccp_v4_reqsk_destructor(struct request_sock *req)
{
kfree(inet_rsk(req)->opt);
.twsk_obj_size = sizeof(struct inet_timewait_sock),
};
-struct proto dccp_prot = {
+static struct proto dccp_v4_prot = {
.name = "DCCP",
.owner = THIS_MODULE,
.close = dccp_close,
.sendmsg = dccp_sendmsg,
.recvmsg = dccp_recvmsg,
.backlog_rcv = dccp_v4_do_rcv,
- .hash = dccp_v4_hash,
+ .hash = dccp_hash,
.unhash = dccp_unhash,
.accept = inet_csk_accept,
.get_port = dccp_v4_get_port,
.shutdown = dccp_shutdown,
- .destroy = dccp_v4_destroy_sock,
+ .destroy = dccp_destroy_sock,
.orphan_count = &dccp_orphan_count,
.max_header = MAX_DCCP_HEADER,
.obj_size = sizeof(struct dccp_sock),
.rsk_prot = &dccp_request_sock_ops,
.twsk_prot = &dccp_timewait_sock_ops,
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_dccp_setsockopt,
+ .compat_getsockopt = compat_dccp_getsockopt,
+#endif
+};
+
+static struct net_protocol dccp_v4_protocol = {
+ .handler = dccp_v4_rcv,
+ .err_handler = dccp_v4_err,
+ .no_policy = 1,
+};
+
+static const struct proto_ops inet_dccp_ops = {
+ .family = PF_INET,
+ .owner = THIS_MODULE,
+ .release = inet_release,
+ .bind = inet_bind,
+ .connect = inet_stream_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = inet_accept,
+ .getname = inet_getname,
+ /* FIXME: work on tcp_poll to rename it to inet_csk_poll */
+ .poll = dccp_poll,
+ .ioctl = inet_ioctl,
+ /* FIXME: work on inet_listen to rename it to sock_common_listen */
+ .listen = inet_dccp_listen,
+ .shutdown = inet_shutdown,
+ .setsockopt = sock_common_setsockopt,
+ .getsockopt = sock_common_getsockopt,
+ .sendmsg = inet_sendmsg,
+ .recvmsg = sock_common_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_sock_common_setsockopt,
+ .compat_getsockopt = compat_sock_common_getsockopt,
+#endif
};
-EXPORT_SYMBOL_GPL(dccp_prot);
+static struct inet_protosw dccp_v4_protosw = {
+ .type = SOCK_DCCP,
+ .protocol = IPPROTO_DCCP,
+ .prot = &dccp_v4_prot,
+ .ops = &inet_dccp_ops,
+ .capability = -1,
+ .no_check = 0,
+ .flags = INET_PROTOSW_ICSK,
+};
+
+static int __init dccp_v4_init(void)
+{
+ int err = proto_register(&dccp_v4_prot, 1);
+
+ if (err != 0)
+ goto out;
+
+ err = inet_add_protocol(&dccp_v4_protocol, IPPROTO_DCCP);
+ if (err != 0)
+ goto out_proto_unregister;
+
+ inet_register_protosw(&dccp_v4_protosw);
+
+ err = inet_csk_ctl_sock_create(&dccp_v4_ctl_socket, PF_INET,
+ SOCK_DCCP, IPPROTO_DCCP);
+ if (err)
+ goto out_unregister_protosw;
+out:
+ return err;
+out_unregister_protosw:
+ inet_unregister_protosw(&dccp_v4_protosw);
+ inet_del_protocol(&dccp_v4_protocol, IPPROTO_DCCP);
+out_proto_unregister:
+ proto_unregister(&dccp_v4_prot);
+ goto out;
+}
+
+static void __exit dccp_v4_exit(void)
+{
+ inet_unregister_protosw(&dccp_v4_protosw);
+ inet_del_protocol(&dccp_v4_protocol, IPPROTO_DCCP);
+ proto_unregister(&dccp_v4_prot);
+}
+
+module_init(dccp_v4_init);
+module_exit(dccp_v4_exit);
+
+/*
+ * __stringify doesn't likes enums, so use SOCK_DCCP (6) and IPPROTO_DCCP (33)
+ * 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_LICENSE("GPL");
+MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
+MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol");
projects / linux-flexiantxendom0-3.2.10.git / blobdiff