From afe00251dd9b53d51de91ff0099961f42bbf3754 Mon Sep 17 00:00:00 2001 From: Andrea Bittau Date: Mon, 20 Mar 2006 17:43:56 -0800 Subject: [DCCP]: Initial feature negotiation implementation Still needs more work, but boots and doesn't crashes, even does some negotiation! 18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request 18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response 18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: :-) Signed-off-by: Andrea Bittau Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- net/dccp/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/dccp/Makefile') diff --git a/net/dccp/Makefile b/net/dccp/Makefile index 87b27fff6e3b..5736acea1c86 100644 --- a/net/dccp/Makefile +++ b/net/dccp/Makefile @@ -4,7 +4,7 @@ dccp_ipv6-y := ipv6.o obj-$(CONFIG_IP_DCCP) += dccp.o -dccp-y := ccid.o input.o ipv4.o minisocks.o options.o output.o proto.o \ +dccp-y := ccid.o feat.o input.o ipv4.o minisocks.o options.o output.o proto.o \ timer.o dccp-$(CONFIG_IP_DCCP_ACKVEC) += ackvec.o -- cgit v1.2.3 From e55d912f5b75723159348a7fc7692f869a86636a Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 20 Mar 2006 19:25:02 -0800 Subject: [DCCP] feat: Introduce sysctls for the default features [root@qemu ~]# for a in /proc/sys/net/dccp/default/* ; do echo $a ; cat $a ; done /proc/sys/net/dccp/default/ack_ratio 2 /proc/sys/net/dccp/default/rx_ccid 3 /proc/sys/net/dccp/default/send_ackvec 1 /proc/sys/net/dccp/default/send_ndp 1 /proc/sys/net/dccp/default/seq_window 100 /proc/sys/net/dccp/default/tx_ccid 3 [root@qemu ~]# So if wanting to test ccid3 as the tx CCID one can just do: [root@qemu ~]# echo 3 > /proc/sys/net/dccp/default/tx_ccid [root@qemu ~]# echo 2 > /proc/sys/net/dccp/default/rx_ccid [root@qemu ~]# cat /proc/sys/net/dccp/default/[tr]x_ccid 2 3 [root@qemu ~]# Of course we also need the setsockopt for each app to tell its preferences, but for testing or defining something other than CCID2 as the default for apps that don't explicitely set their preference the sysctl interface is handy. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- include/linux/sysctl.h | 16 +++++++ net/dccp/Makefile | 2 + net/dccp/dccp.h | 14 ++++++ net/dccp/options.c | 22 +++++---- net/dccp/proto.c | 9 +++- net/dccp/sysctl.c | 124 +++++++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 176 insertions(+), 11 deletions(-) create mode 100644 net/dccp/sysctl.c (limited to 'net/dccp/Makefile') diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index b686548f32e0..dfcf449afc7c 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -211,6 +211,7 @@ enum NET_SCTP=17, NET_LLC=18, NET_NETFILTER=19, + NET_DCCP=20, }; /* /proc/sys/kernel/random */ @@ -571,6 +572,21 @@ enum { __NET_NEIGH_MAX }; +/* /proc/sys/net/dccp */ +enum { + NET_DCCP_DEFAULT=1, +}; + +/* /proc/sys/net/dccp/default */ +enum { + NET_DCCP_DEFAULT_SEQ_WINDOW = 1, + NET_DCCP_DEFAULT_RX_CCID = 2, + NET_DCCP_DEFAULT_TX_CCID = 3, + NET_DCCP_DEFAULT_ACK_RATIO = 4, + NET_DCCP_DEFAULT_SEND_ACKVEC = 5, + NET_DCCP_DEFAULT_SEND_NDP = 6, +}; + /* /proc/sys/net/ipx */ enum { NET_IPX_PPROP_BROADCASTING=1, diff --git a/net/dccp/Makefile b/net/dccp/Makefile index 5736acea1c86..7af0569fe4cb 100644 --- a/net/dccp/Makefile +++ b/net/dccp/Makefile @@ -11,6 +11,8 @@ dccp-$(CONFIG_IP_DCCP_ACKVEC) += ackvec.o obj-$(CONFIG_INET_DCCP_DIAG) += dccp_diag.o +dccp-$(CONFIG_SYSCTL) += sysctl.o + dccp_diag-y := diag.o obj-y += ccids/ diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h index 1764adb4f15e..f059541f5a1d 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -433,4 +433,18 @@ static inline void timeval_sub_usecs(struct timeval *tv, } } +#ifdef CONFIG_SYSCTL +extern int dccp_sysctl_init(void); +extern void dccp_sysctl_exit(void); +#else +static inline int dccp_sysctl_init(void) +{ + return 0; +} + +static inline void dccp_sysctl_exit(void) +{ +} +#endif + #endif /* _DCCP_H */ diff --git a/net/dccp/options.c b/net/dccp/options.c index 7d73b33a6043..3ecd319c0f59 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -23,19 +23,21 @@ #include "dccp.h" #include "feat.h" -/* stores the default values for new connection. may be changed with sysctl */ -static const struct dccp_options dccpo_default_values = { - .dccpo_sequence_window = DCCPF_INITIAL_SEQUENCE_WINDOW, - .dccpo_rx_ccid = DCCPF_INITIAL_CCID, - .dccpo_tx_ccid = DCCPF_INITIAL_CCID, - .dccpo_ack_ratio = DCCPF_INITIAL_ACK_RATIO, - .dccpo_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR, - .dccpo_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT, -}; +int dccp_feat_default_sequence_window = DCCPF_INITIAL_SEQUENCE_WINDOW; +int dccp_feat_default_rx_ccid = DCCPF_INITIAL_CCID; +int dccp_feat_default_tx_ccid = DCCPF_INITIAL_CCID; +int dccp_feat_default_ack_ratio = DCCPF_INITIAL_ACK_RATIO; +int dccp_feat_default_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR; +int dccp_feat_default_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT; void dccp_options_init(struct dccp_options *dccpo) { - memcpy(dccpo, &dccpo_default_values, sizeof(*dccpo)); + dccpo->dccpo_sequence_window = dccp_feat_default_sequence_window; + dccpo->dccpo_rx_ccid = dccp_feat_default_rx_ccid; + dccpo->dccpo_tx_ccid = dccp_feat_default_tx_ccid; + dccpo->dccpo_ack_ratio = dccp_feat_default_ack_ratio; + dccpo->dccpo_send_ack_vector = dccp_feat_default_send_ack_vector; + dccpo->dccpo_send_ndp_count = dccp_feat_default_send_ndp_count; } static u32 dccp_decode_value_var(const unsigned char *bf, const u8 len) diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 53735ee2bbd1..6403e9306ddb 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -934,11 +934,17 @@ static int __init dccp_init(void) if (rc) goto out_unregister_protosw; - rc = dccp_ctl_sock_init(); + rc = dccp_sysctl_init(); if (rc) goto out_ackvec_exit; + + rc = dccp_ctl_sock_init(); + if (rc) + goto out_sysctl_exit; out: return rc; +out_sysctl_exit: + dccp_sysctl_exit(); out_ackvec_exit: dccp_ackvec_exit(); out_unregister_protosw: @@ -983,6 +989,7 @@ static void __exit dccp_fini(void) kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); proto_unregister(&dccp_prot); dccp_ackvec_exit(); + dccp_sysctl_exit(); } module_init(dccp_init); diff --git a/net/dccp/sysctl.c b/net/dccp/sysctl.c new file mode 100644 index 000000000000..64c89e9c229e --- /dev/null +++ b/net/dccp/sysctl.c @@ -0,0 +1,124 @@ +/* + * net/dccp/sysctl.c + * + * An implementation of the DCCP protocol + * Arnaldo Carvalho de Melo + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License v2 + * as published by the Free Software Foundation. + */ + +#include +#include +#include + +#ifndef CONFIG_SYSCTL +#error This file should not be compiled without CONFIG_SYSCTL defined +#endif + +extern int dccp_feat_default_sequence_window; +extern int dccp_feat_default_rx_ccid; +extern int dccp_feat_default_tx_ccid; +extern int dccp_feat_default_ack_ratio; +extern int dccp_feat_default_send_ack_vector; +extern int dccp_feat_default_send_ndp_count; + +static struct ctl_table dccp_default_table[] = { + { + .ctl_name = NET_DCCP_DEFAULT_SEQ_WINDOW, + .procname = "seq_window", + .data = &dccp_feat_default_sequence_window, + .maxlen = sizeof(dccp_feat_default_sequence_window), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { + .ctl_name = NET_DCCP_DEFAULT_RX_CCID, + .procname = "rx_ccid", + .data = &dccp_feat_default_rx_ccid, + .maxlen = sizeof(dccp_feat_default_rx_ccid), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { + .ctl_name = NET_DCCP_DEFAULT_TX_CCID, + .procname = "tx_ccid", + .data = &dccp_feat_default_tx_ccid, + .maxlen = sizeof(dccp_feat_default_tx_ccid), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { + .ctl_name = NET_DCCP_DEFAULT_ACK_RATIO, + .procname = "ack_ratio", + .data = &dccp_feat_default_ack_ratio, + .maxlen = sizeof(dccp_feat_default_ack_ratio), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { + .ctl_name = NET_DCCP_DEFAULT_SEND_ACKVEC, + .procname = "send_ackvec", + .data = &dccp_feat_default_send_ack_vector, + .maxlen = sizeof(dccp_feat_default_send_ack_vector), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { + .ctl_name = NET_DCCP_DEFAULT_SEND_NDP, + .procname = "send_ndp", + .data = &dccp_feat_default_send_ndp_count, + .maxlen = sizeof(dccp_feat_default_send_ndp_count), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { .ctl_name = 0, } +}; + +static struct ctl_table dccp_table[] = { + { + .ctl_name = NET_DCCP_DEFAULT, + .procname = "default", + .mode = 0555, + .child = dccp_default_table, + }, + { .ctl_name = 0, }, +}; + +static struct ctl_table dccp_dir_table[] = { + { + .ctl_name = NET_DCCP, + .procname = "dccp", + .mode = 0555, + .child = dccp_table, + }, + { .ctl_name = 0, }, +}; + +static struct ctl_table dccp_root_table[] = { + { + .ctl_name = CTL_NET, + .procname = "net", + .mode = 0555, + .child = dccp_dir_table, + }, + { .ctl_name = 0, }, +}; + +static struct ctl_table_header *dccp_table_header; + +int __init dccp_sysctl_init(void) +{ + dccp_table_header = register_sysctl_table(dccp_root_table, 1); + + return dccp_table_header != NULL ? 0 : -ENOMEM; +} + +void dccp_sysctl_exit(void) +{ + if (dccp_table_header != NULL) { + unregister_sysctl_table(dccp_table_header); + dccp_table_header = NULL; + } +} -- cgit v1.2.3 From b61fafc4ef3faf54236d57e3b230ca19167663bf Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 20 Mar 2006 21:25:11 -0800 Subject: [DCCP]: Move the IPv4 specific bits from proto.c to ipv4.c With this patch in place we can break down the complexity by better compartmentalizing the code that is common to ipv6 and ipv4. Now we have these modules: Module Size Used by dccp_diag 1344 0 inet_diag 9448 1 dccp_diag dccp_ccid3 15856 0 dccp_tfrc_lib 12320 1 dccp_ccid3 dccp_ccid2 5764 0 dccp_ipv4 16996 2 dccp 48208 4 dccp_diag,dccp_ccid3,dccp_ccid2,dccp_ipv4 dccp_ipv6 still requires dccp_ipv4 due to dccp_ipv6_mapped, that is the next target to work on the "hey, ipv4 is legacy, I only want ipv6 dude!" direction. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- net/dccp/Makefile | 7 +-- net/dccp/dccp.h | 6 --- net/dccp/ipv4.c | 140 +++++++++++++++++++++++++++++++++++++++++++++++++++-- net/dccp/options.c | 2 + net/dccp/output.c | 2 + net/dccp/proto.c | 132 ++------------------------------------------------ 6 files changed, 148 insertions(+), 141 deletions(-) (limited to 'net/dccp/Makefile') diff --git a/net/dccp/Makefile b/net/dccp/Makefile index 7af0569fe4cb..7696e219b05d 100644 --- a/net/dccp/Makefile +++ b/net/dccp/Makefile @@ -2,10 +2,11 @@ obj-$(CONFIG_IPV6) += dccp_ipv6.o dccp_ipv6-y := ipv6.o -obj-$(CONFIG_IP_DCCP) += dccp.o +obj-$(CONFIG_IP_DCCP) += dccp.o dccp_ipv4.o -dccp-y := ccid.o feat.o input.o ipv4.o minisocks.o options.o output.o proto.o \ - timer.o +dccp-y := ccid.o feat.o input.o minisocks.o options.o output.o proto.o timer.o + +dccp_ipv4-y := ipv4.o dccp-$(CONFIG_IP_DCCP_ACKVEC) += ackvec.o diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h index b6ea4cc12608..46aa4814d65f 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -59,8 +59,6 @@ extern void dccp_time_wait(struct sock *sk, int state, int timeo); #define DCCP_RTO_MAX ((unsigned)(120 * HZ)) /* FIXME: using TCP value */ -extern struct proto dccp_prot; - /* is seq1 < seq2 ? */ static inline int before48(const u64 seq1, const u64 seq2) { @@ -209,10 +207,6 @@ extern struct sock *dccp_create_openreq_child(struct sock *sk, extern int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb); -extern void dccp_v4_err(struct sk_buff *skb, u32); - -extern int dccp_v4_rcv(struct sk_buff *skb); - extern struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb, struct request_sock *req, diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index a7332f0f85c4..033c3ab8fe33 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -18,8 +18,10 @@ #include #include +#include #include #include +#include #include #include #include @@ -285,7 +287,7 @@ out: * 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 + @@ -639,6 +641,8 @@ int dccp_v4_checksum(const struct sk_buff *skb, const __be32 saddr, IPPROTO_DCCP, tmp); } +EXPORT_SYMBOL_GPL(dccp_v4_checksum); + static int dccp_v4_verify_checksum(struct sk_buff *skb, const __be32 saddr, const __be32 daddr) { @@ -871,7 +875,7 @@ int dccp_invalid_packet(struct sk_buff *skb) 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; @@ -978,7 +982,7 @@ do_time_wait: goto no_dccp_socket; } -struct inet_connection_sock_af_ops dccp_ipv4_af_ops = { +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, @@ -1018,7 +1022,7 @@ static struct timewait_sock_ops dccp_timewait_sock_ops = { .twsk_obj_size = sizeof(struct inet_timewait_sock), }; -struct proto dccp_prot = { +struct proto dccp_v4_prot = { .name = "DCCP", .owner = THIS_MODULE, .close = dccp_close, @@ -1044,4 +1048,130 @@ struct proto dccp_prot = { .twsk_prot = &dccp_timewait_sock_ops, }; -EXPORT_SYMBOL_GPL(dccp_prot); +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, +}; + +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, +}; + +/* + * 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. + */ +struct socket *dccp_ctl_socket; + +static char dccp_ctl_socket_err_msg[] __initdata = + KERN_ERR "DCCP: Failed to create the control socket.\n"; + +static int __init dccp_ctl_sock_init(void) +{ + int rc = sock_create_kern(PF_INET, SOCK_DCCP, IPPROTO_DCCP, + &dccp_ctl_socket); + if (rc < 0) + printk(dccp_ctl_socket_err_msg); + else { + dccp_ctl_socket->sk->sk_allocation = GFP_ATOMIC; + inet_sk(dccp_ctl_socket->sk)->uc_ttl = -1; + + /* Unhash it so that IP input processing does not even + * see it, we do not wish this socket to see incoming + * packets. + */ + dccp_ctl_socket->sk->sk_prot->unhash(dccp_ctl_socket->sk); + } + + return rc; +} + +#ifdef CONFIG_IP_DCCP_UNLOAD_HACK +void dccp_ctl_sock_exit(void) +{ + if (dccp_ctl_socket != NULL) { + sock_release(dccp_ctl_socket); + dccp_ctl_socket = NULL; + } +} + +EXPORT_SYMBOL_GPL(dccp_ctl_sock_exit); +#endif + +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 = dccp_ctl_sock_init(); + 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 "); +MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol"); diff --git a/net/dccp/options.c b/net/dccp/options.c index 3ecd319c0f59..79d228e4d6b2 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -258,6 +258,8 @@ out_invalid_option: return -1; } +EXPORT_SYMBOL_GPL(dccp_parse_options); + static void dccp_encode_value_var(const u32 value, unsigned char *to, const unsigned int len) { diff --git a/net/dccp/output.c b/net/dccp/output.c index 6bd21e37686e..8c83aa51572e 100644 --- a/net/dccp/output.c +++ b/net/dccp/output.c @@ -526,6 +526,8 @@ void dccp_send_sync(struct sock *sk, const u64 seq, dccp_transmit_skb(sk, skb); } +EXPORT_SYMBOL_GPL(dccp_send_sync); + /* * Send a DCCP_PKT_CLOSE/CLOSEREQ. The caller locks the socket for us. This * cannot be allowed to fail queueing a DCCP_PKT_CLOSE/CLOSEREQ frame under diff --git a/net/dccp/proto.c b/net/dccp/proto.c index abab6c10af96..ef94b0c8a0c0 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -23,9 +23,7 @@ #include #include -#include #include -#include #include #include @@ -55,12 +53,6 @@ struct inet_hashinfo __cacheline_aligned dccp_hashinfo = { EXPORT_SYMBOL_GPL(dccp_hashinfo); -static struct net_protocol dccp_protocol = { - .handler = dccp_v4_rcv, - .err_handler = dccp_v4_err, - .no_policy = 1, -}; - const char *dccp_packet_name(const int type) { static const char *dccp_packet_names[] = { @@ -856,83 +848,6 @@ void dccp_shutdown(struct sock *sk, int how) EXPORT_SYMBOL_GPL(dccp_shutdown); -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, -}; - -extern struct net_proto_family inet_family_ops; - -static struct inet_protosw dccp_v4_protosw = { - .type = SOCK_DCCP, - .protocol = IPPROTO_DCCP, - .prot = &dccp_prot, - .ops = &inet_dccp_ops, - .capability = -1, - .no_check = 0, - .flags = INET_PROTOSW_ICSK, -}; - -/* - * 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. - */ -struct socket *dccp_ctl_socket; - -static char dccp_ctl_socket_err_msg[] __initdata = - KERN_ERR "DCCP: Failed to create the control socket.\n"; - -static int __init dccp_ctl_sock_init(void) -{ - int rc = sock_create_kern(PF_INET, SOCK_DCCP, IPPROTO_DCCP, - &dccp_ctl_socket); - if (rc < 0) - printk(dccp_ctl_socket_err_msg); - else { - dccp_ctl_socket->sk->sk_allocation = GFP_ATOMIC; - inet_sk(dccp_ctl_socket->sk)->uc_ttl = -1; - - /* Unhash it so that IP input processing does not even - * see it, we do not wish this socket to see incoming - * packets. - */ - dccp_ctl_socket->sk->sk_prot->unhash(dccp_ctl_socket->sk); - } - - return rc; -} - -#ifdef CONFIG_IP_DCCP_UNLOAD_HACK -void dccp_ctl_sock_exit(void) -{ - if (dccp_ctl_socket != NULL) { - sock_release(dccp_ctl_socket); - dccp_ctl_socket = NULL; - } -} - -EXPORT_SYMBOL_GPL(dccp_ctl_sock_exit); -#endif - static int __init dccp_mib_init(void) { int rc = -ENOMEM; @@ -955,7 +870,7 @@ out_free_one: } -static int dccp_mib_exit(void) +static void dccp_mib_exit(void) { free_percpu(dccp_statistics[0]); free_percpu(dccp_statistics[1]); @@ -978,18 +893,14 @@ static int __init dccp_init(void) { unsigned long goal; int ehash_order, bhash_order, i; - int rc = proto_register(&dccp_prot, 1); + int rc = -ENOBUFS; - if (rc) - goto out; - - rc = -ENOBUFS; dccp_hashinfo.bind_bucket_cachep = kmem_cache_create("dccp_bind_bucket", sizeof(struct inet_bind_bucket), 0, SLAB_HWCACHE_ALIGN, NULL, NULL); if (!dccp_hashinfo.bind_bucket_cachep) - goto out_proto_unregister; + goto out; /* * Size and allocate the main established and bind bucket @@ -1055,33 +966,18 @@ static int __init dccp_init(void) if (rc) goto out_free_dccp_bhash; - rc = -EAGAIN; - if (inet_add_protocol(&dccp_protocol, IPPROTO_DCCP)) - goto out_free_dccp_v4_mibs; - - inet_register_protosw(&dccp_v4_protosw); - rc = dccp_ackvec_init(); if (rc) - goto out_unregister_protosw; + goto out_free_dccp_mib; rc = dccp_sysctl_init(); if (rc) goto out_ackvec_exit; - - rc = dccp_ctl_sock_init(); - if (rc) - goto out_sysctl_exit; out: return rc; -out_sysctl_exit: - dccp_sysctl_exit(); out_ackvec_exit: dccp_ackvec_exit(); -out_unregister_protosw: - inet_unregister_protosw(&dccp_v4_protosw); - inet_del_protocol(&dccp_protocol, IPPROTO_DCCP); -out_free_dccp_v4_mibs: +out_free_dccp_mib: dccp_mib_exit(); out_free_dccp_bhash: free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order); @@ -1092,21 +988,11 @@ out_free_dccp_ehash: out_free_bind_bucket_cachep: kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); dccp_hashinfo.bind_bucket_cachep = NULL; -out_proto_unregister: - proto_unregister(&dccp_prot); goto out; } -static const char dccp_del_proto_err_msg[] __exitdata = - KERN_ERR "can't remove dccp net_protocol\n"; - static void __exit dccp_fini(void) { - inet_unregister_protosw(&dccp_v4_protosw); - - if (inet_del_protocol(&dccp_protocol, IPPROTO_DCCP) < 0) - printk(dccp_del_proto_err_msg); - dccp_mib_exit(); free_pages((unsigned long)dccp_hashinfo.bhash, get_order(dccp_hashinfo.bhash_size * @@ -1115,7 +1001,6 @@ static void __exit dccp_fini(void) get_order(dccp_hashinfo.ehash_size * sizeof(struct inet_ehash_bucket))); kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); - proto_unregister(&dccp_prot); dccp_ackvec_exit(); dccp_sysctl_exit(); } @@ -1123,13 +1008,6 @@ static void __exit dccp_fini(void) module_init(dccp_init); module_exit(dccp_fini); -/* - * __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 "); MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol"); -- cgit v1.2.3