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/linux-6.8/Documentation/networking/
Dtcp_ao.rst4 TCP Authentication Option Linux implementation (RFC5925)
7 TCP Authentication Option (TCP-AO) provides a TCP extension aimed at verifying
8 segments between trusted peers. It adds a new TCP header option with
10 of a TCP segment using a hashing function with a password known to both peers.
11 The intent of TCP-AO is to deprecate TCP-MD5 providing better security,
17 .. table:: Short and Limited Comparison of TCP-AO and TCP-MD5
20 | | TCP-MD5 | TCP-AO |
31 | | |TCP header permitted. |
34 |TCP connection | | |
45 |traffic-crossing | |includes TCP ports. |
[all …]
Dkcm.rst8 interface over TCP for generic application protocols. With KCM an application
9 can efficiently send and receive application protocol messages over TCP using
31 | TCP sock | | TCP sock | | TCP sock | | TCP sock | | TCP sock |
46 written on a KCM socket are sent atomically on an appropriate TCP socket.
47 Similarly, in the receive path, messages are constructed on each TCP socket
50 TCP sockets & Psocks
53 TCP sockets may be bound to a KCM multiplexor. A Psock structure is allocated
54 for each bound TCP socket, this structure holds the state for constructing
60 Each multiplexor assumes that all attached TCP connections are to the same
73 Messages are sent over a TCP stream with some application protocol message
[all …]
Dsnmp_counter.rst32 The number of packets delivers to the upper layer protocols. E.g. TCP, UDP,
249 General TCP counters
257 The number of packets received by the TCP layer. As mentioned in
259 error, invalid TCP header and so on. Only one error won't be included:
263 packets would be delivered to the TCP layer, but the TCP layer will discard
274 The number of packets sent by the TCP layer. As mentioned in RFC1213,
286 It means the TCP layer sends a SYN, and come into the SYN-SENT
296 It means the TCP layer receives a SYN, replies a SYN+ACK, come into
301 When packets are received by the TCP layer and are not be read by the
302 application, the TCP layer will try to merge them. This counter
[all …]
Dtls-offload.rst10 Linux kernel provides TLS connection offload infrastructure. Once a TCP
29 * Full TCP NIC offload mode (``TLS_HW_RECORD``) - mode of operation where
31 with its own TCP handling, it is not usable in production environments
43 mode) and then hands the modified scatter list to the TCP layer. From this
44 point on the TCP stack proceeds as normal.
56 :c:type:`struct sk_buff <sk_buff>`. The packets reach the TCP stack and
101 which TCP sequence number corresponds to the beginning of the record with
112 number, simplifying TCP sequence number matching.
124 so the initial records' TCP sequence number may be anywhere inside the segment.
135 * expected TCP sequence number
[all …]
/linux-6.8/net/ipv4/
DKconfig269 bool "IP: TCP syncookie support"
271 Normal TCP/IP networking is open to an attack known as "SYN
278 say Y here, the TCP/IP stack will use a cryptographic challenge
281 is no need for the legitimate users to change their TCP/IP software;
384 bool "IP: ESP in TCP encapsulation (RFC 8229)"
391 TCP/IPv4 sockets.
428 Support for INET (TCP, DCCP, etc) socket monitoring interface used by
470 bool "TCP: advanced congestion control"
472 Support for selection of various TCP congestion control
486 BIC-TCP is a sender-side only change that ensures a linear RTT
[all …]
Dtcp_lp.c3 * TCP Low Priority (TCP-LP)
5 * TCP Low Priority is a distributed algorithm whose goal is to utilize only
7 * bandwidth as targeted by TCP.
11 * the original TCP-LP implementation:
26 * http://www.ece.rice.edu/~akuzma/Doc/akuzma/TCP-LP.pdf
28 * http://www-ece.rice.edu/networks/TCP-LP/
34 * http://tcp-lp-mod.sourceforge.net/
38 #include <net/tcp.h>
50 * TCP-LP's state flags.
62 * @flag: TCP-LP state flag
[all …]
Dtcp_westwood.c3 * TCP Westwood+: end-to-end bandwidth estimation for TCP
5 * Angelo Dell'Aera: author of the first version of TCP Westwood+ in Linux 2.4
11 * "TCP Westwood: bandwidth estimation for TCP" Proc. ACM Mobicom 2001
14 * "Performance evaluation of New Reno, Vegas, Westwood+ TCP" ACM Computer
18 * "Linux 2.4 Implementation of Westwood+ TCP with Rate-Halving :
29 #include <net/tcp.h>
31 /* TCP Westwood structure */
46 /* TCP Westwood functions and constants */
52 * This function initializes fields used in TCP Westwood+,
212 * TCP Westwood
[all …]
/linux-6.8/net/netfilter/
Dnf_conntrack_proto_tcp.c12 #include <linux/tcp.h>
19 #include <net/tcp.h>
91 /* What TCP flags are set from RST/SYN/FIN/ACK. */
102 * The TCP state transition table needs a few words...
271 seq_printf(s, "%s ", tcp_conntrack_names[ct->proto.tcp.state]); in tcp_print_conntrack()
284 /* TCP connection tracking based on 'Real Stateful TCP Packet Filtering
515 struct ip_ct_tcp *state = &ct->proto.tcp; in tcp_in_window()
581 * RFC 793: "if a TCP is reinitialized ... then it need in tcp_in_window()
586 * syn(-ack) reply, it might differ in seq, ack or tcp options. in tcp_in_window()
605 * Broken TCP stacks, that set ACK in RST packets as well in tcp_in_window()
[all …]
Dnft_synproxy.c4 #include <net/tcp.h>
24 const struct tcphdr *tcp, in nft_synproxy_tcp_options() argument
30 if (tcp->ece && tcp->cwr) in nft_synproxy_tcp_options()
47 const struct tcphdr *tcp, in nft_synproxy_eval_v4() argument
56 if (tcp->syn) { in nft_synproxy_eval_v4()
58 nft_synproxy_tcp_options(opts, tcp, snet, &info, priv); in nft_synproxy_eval_v4()
59 synproxy_send_client_synack(net, skb, tcp, opts); in nft_synproxy_eval_v4()
62 } else if (tcp->ack) { in nft_synproxy_eval_v4()
64 if (synproxy_recv_client_ack(net, skb, tcp, opts, in nft_synproxy_eval_v4()
65 ntohl(tcp->seq))) { in nft_synproxy_eval_v4()
[all …]
Dnfnetlink_osf.c14 #include <linux/tcp.h>
17 #include <net/tcp.h>
171 const struct tcphdr *tcp; in nf_osf_hdr_ctx_init() local
173 tcp = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(struct tcphdr), _tcph); in nf_osf_hdr_ctx_init()
174 if (!tcp) in nf_osf_hdr_ctx_init()
177 if (!tcp->syn) in nf_osf_hdr_ctx_init()
182 ctx->window = ntohs(tcp->window); in nf_osf_hdr_ctx_init()
184 if (tcp->doff * 4 > sizeof(struct tcphdr)) { in nf_osf_hdr_ctx_init()
185 ctx->optsize = tcp->doff * 4 - sizeof(struct tcphdr); in nf_osf_hdr_ctx_init()
193 return tcp; in nf_osf_hdr_ctx_init()
[all …]
/linux-6.8/tools/testing/selftests/bpf/prog_tests/
Dflow_dissector.c47 struct tcphdr tcp; member
54 struct tcphdr tcp; member
62 struct tcphdr tcp; member
68 struct tcphdr tcp; member
80 struct tcphdr tcp; member
90 struct tcphdr tcp; member
119 .tcp.doff = 5,
120 .tcp.source = 80,
121 .tcp.dest = 8080,
140 .tcp.doff = 5,
[all …]
Dcls_redirect.c10 #include <netinet/tcp.h>
172 TCP, enumerator
214 type = "TCP"; in test_str()
241 { TCP, ACCEPT, UNKNOWN_CONN, NO_HOPS, SYN },
242 { TCP, ACCEPT, UNKNOWN_CONN, NO_HOPS, ACK },
243 { TCP, FORWARD, UNKNOWN_CONN, ONE_HOP, ACK },
244 { TCP, ACCEPT, KNOWN_CONN, ONE_HOP, ACK },
283 struct tcphdr tcp; in build_input() local
335 case TCP: in build_input()
336 tcp = (struct tcphdr){ in build_input()
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/linux-6.8/tools/testing/selftests/net/tcp_ao/
Dunsigned-md5.c134 try_accept("TCP-AO established: add TCP-MD5 key", (*port)++, NULL, 0, in server_add_fail_tests()
137 try_accept("TCP-MD5 established: add TCP-AO key", (*port)++, &addr_any, in server_add_fail_tests()
139 try_accept("non-signed established: add TCP-AO key", (*port)++, NULL, 0, in server_add_fail_tests()
221 try_accept("AO+MD5 server: client with both [TCP-MD5] and TCP-AO keys", in server_fn()
224 try_accept("AO+MD5 server: client with both TCP-MD5 and [TCP-AO] keys", in server_fn()
516 try_to_add("TCP-AO established: add TCP-MD5 key", in client_add_fail_tests()
520 try_to_add("TCP-MD5 established: add TCP-AO key", in client_add_fail_tests()
524 try_to_add("non-signed established: add TCP-AO key", in client_add_fail_tests()
529 try_to_add("TCP-AO key intersects with existing TCP-MD5 key", in client_add_fail_tests()
533 try_to_add("TCP-MD5 key intersects with existing TCP-AO key", in client_add_fail_tests()
[all …]
/linux-6.8/tools/testing/selftests/bpf/progs/
Dxdp_synproxy_kern.c369 struct tcphdr *tcp; member
395 hdr->tcp = (void *)hdr->ipv4 + hdr->ipv4->ihl * 4; in tcp_dissect()
412 hdr->tcp = (void *)hdr->ipv6 + sizeof(*hdr->ipv6); in tcp_dissect()
419 if (hdr->tcp + 1 > data_end) in tcp_dissect()
421 hdr->tcp_len = hdr->tcp->doff * 4; in tcp_dissect()
422 if (hdr->tcp_len < sizeof(*hdr->tcp)) in tcp_dissect()
439 /* TCP doesn't normally use fragments, and XDP can't reassemble in tcp_lookup()
447 tup.ipv4.sport = hdr->tcp->source; in tcp_lookup()
448 tup.ipv4.dport = hdr->tcp->dest; in tcp_lookup()
453 tup.ipv6.sport = hdr->tcp->source; in tcp_lookup()
[all …]
Dtest_pkt_access.c12 #include <linux/tcp.h>
89 struct tcphdr *tcp = NULL; in test_pkt_write_access_subprog() local
94 tcp = data + off; in test_pkt_write_access_subprog()
95 if (tcp + 1 > data_end) in test_pkt_write_access_subprog()
98 tcp->check++; in test_pkt_write_access_subprog()
108 struct tcphdr *tcp = NULL; in test_pkt_access() local
122 tcp = (struct tcphdr *)((void *)(iph) + ihl_len); in test_pkt_access()
130 tcp = (struct tcphdr *)((void *)(ip6h) + ihl_len); in test_pkt_access()
139 if (tcp) { in test_pkt_access()
140 if (test_pkt_write_access_subprog(skb, (void *)tcp - data)) in test_pkt_access()
[all …]
Dtest_migrate_reuseport.c19 #include <linux/tcp.h>
50 struct tcphdr *tcp = NULL; in drop_ack() local
65 tcp = (struct tcphdr *)((void *)ip + ip->ihl * 4); in drop_ack()
77 tcp = (struct tcphdr *)(ipv6 + 1); in drop_ack()
84 if (tcp + 1 > data_end) in drop_ack()
87 if (tcp->dest != server_port) in drop_ack()
90 if (!tcp->syn && tcp->ack) in drop_ack()
/linux-6.8/include/net/
Dslhc_vj.h4 * Definitions for tcp compression routines.
43 * The first octet contains the packet type (top 3 bits), TCP
44 * 'push' bit, and flags that indicate which of the 4 TCP sequence
46 * conversation number that associates a saved IP/TCP header with
47 * the compressed packet. The next two octets are the TCP checksum
54 * in the following order): TCP urgent pointer, window,
69 * three possible types: IP (not proto TCP or tcp with one of the
70 * control flags set); uncompressed TCP (a normal IP/TCP packet but
73 * TCP (described above).
75 * LSB of 4-bit field is TCP "PUSH" bit (a worthless anachronism) and
[all …]
Ddropreason-core.h112 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */
154 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met
174 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected,
179 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it
184 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown,
189 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong,
198 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */
201 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero,
206 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data reveived is already
212 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window,
[all …]
/linux-6.8/drivers/net/ethernet/mellanox/mlx5/core/en/tc/
Dct_fs_smfs.c47 mlx5_ct_fs_smfs_fill_mask(struct mlx5_ct_fs *fs, struct mlx5_flow_spec *spec, bool ipv4, bool tcp, in mlx5_ct_fs_smfs_fill_mask() argument
76 if (likely(tcp)) { in mlx5_ct_fs_smfs_fill_mask()
91 bool tcp, bool gre, u32 priority) in mlx5_ct_fs_smfs_matcher_create() argument
100 mlx5_ct_fs_smfs_fill_mask(fs, spec, ipv4, tcp, gre); in mlx5_ct_fs_smfs_matcher_create()
112 mlx5_ct_fs_smfs_matcher_get(struct mlx5_ct_fs *fs, bool nat, bool ipv4, bool tcp, bool gre) in mlx5_ct_fs_smfs_matcher_get() argument
123 smfs_matcher = &matchers->smfs_matchers[ipv4 * 3 + tcp * 2 + gre]; in mlx5_ct_fs_smfs_matcher_get()
149 dr_matcher = mlx5_ct_fs_smfs_matcher_create(fs, tbl, ipv4, tcp, gre, prio); in mlx5_ct_fs_smfs_matcher_get()
152 "ct_fs_smfs: failed to create matcher (nat %d, ipv4 %d, tcp %d, gre %d), err: %ld\n", in mlx5_ct_fs_smfs_matcher_get()
153 nat, ipv4, tcp, gre, PTR_ERR(dr_matcher)); in mlx5_ct_fs_smfs_matcher_get()
230 DISS_BIT(PORTS) | DISS_BIT(TCP); in mlx5_tc_ct_valid_used_dissector_keys()
[all …]
/linux-6.8/include/linux/
Dnvme-tcp.h3 * NVMe over Fabrics TCP protocol header.
62 * struct nvme_tcp_hdr - nvme tcp pdu common header
79 * struct nvme_tcp_icreq_pdu - nvme tcp initialize connection request pdu
97 * struct nvme_tcp_icresp_pdu - nvme tcp initialize connection response pdu
115 * struct nvme_tcp_term_pdu - nvme tcp terminate connection pdu
130 * struct nvme_tcp_cmd_pdu - nvme tcp command capsule pdu
141 * struct nvme_tcp_rsp_pdu - nvme tcp response capsule pdu
144 * @hdr: nvme-tcp generic header
153 * struct nvme_tcp_r2t_pdu - nvme tcp ready-to-transfer pdu
171 * struct nvme_tcp_data_pdu - nvme tcp data pdu
/linux-6.8/net/rds/
Dtcp_send.c35 #include <net/tcp.h>
39 #include "tcp.h"
96 rdsdebug("rm %p tcp nxt %u ack_seq %llu\n", in rds_tcp_xmit()
126 rdsdebug("tcp sendpage %p:%u:%u ret %d\n", (void *)sg_page(&rm->data.op_sg[sg]), in rds_tcp_xmit()
152 pr_warn("RDS/tcp: send to %pI6c on cp [%d]" in rds_tcp_xmit()
166 * rm->m_ack_seq is set to the tcp sequence number that corresponds to the
169 * unacked byte of the TCP sequence space. We have to do very careful
197 rdsdebug("tcp una %u\n", rds_tcp_snd_una(tc)); in rds_tcp_write_space()
211 * write_space is only called when data leaves tcp's send queue if in rds_tcp_write_space()
213 * data in tcp's send queue because we use write_space to parse the in rds_tcp_write_space()
[all …]
/linux-6.8/include/net/netfilter/
Dnf_tproxy.h4 #include <net/tcp.h>
38 * nf_tproxy_handle_time_wait4 - handle IPv4 TCP TIME_WAIT reopen redirections
41 * @lport: TCP port to redirect to or zero.
42 * @sk: The TIME_WAIT TCP socket found by the lookup.
52 * no such listener is found, or NULL if the TCP header is incomplete.
94 * nf_tproxy_handle_time_wait6 - handle IPv6 TCP TIME_WAIT reopen redirections
100 * @lport: TCP port to redirect to or zero.
101 * @sk: The TIME_WAIT TCP socket found by the lookup.
111 * no such listener is found, or NULL if the TCP header is incomplete.
/linux-6.8/tools/testing/selftests/netfilter/
Dconntrack_tcp_unreplied.sh4 # Check that UNREPLIED tcp conntrack will eventually timeout.
97 ct state new tcp flags syn ip daddr 10.99.99.99 tcp dport 80 counter name "connreq" accept
98 ct state new ct status dnat tcp dport 8080 counter name "redir" accept
121 ip daddr 10.99.99.99 tcp dport 80 redirect to :8080
130 count=$(ip netns exec $ns2 conntrack -L -p tcp --dport 80 2>/dev/null | wc -l)
132 echo "ERROR: $ns2 did not pick up tcp connection from peer"
142 count=$(ip netns exec $ns2 conntrack -L -p tcp --reply-port-src 8080 2>/dev/null | wc -l)
164 echo "ERROR: no tcp connection was redirected"
/linux-6.8/include/linux/qed/
Dnvmetcp_common.h8 #include <linux/nvme-tcp.h>
75 NVMETCP_EVENT_TYPE_ASYN_ABORT_RCVD, /* TCP RST packet receive (A-syn EQE) */
76 NVMETCP_EVENT_TYPE_ASYN_CLOSE_RCVD, /* TCP FIN packet receive (A-syn EQE) */
77 NVMETCP_EVENT_TYPE_ASYN_SYN_RCVD, /* TCP SYN+ACK packet receive (A-syn EQE) */
78 NVMETCP_EVENT_TYPE_ASYN_MAX_RT_TIME, /* TCP max retransmit time (A-syn EQE) */
79 NVMETCP_EVENT_TYPE_ASYN_MAX_RT_CNT, /* TCP max retransmit count (A-syn EQE) */
80 NVMETCP_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT, /* TCP ka probes count (A-syn EQE) */
81 NVMETCP_EVENT_TYPE_ASYN_FIN_WAIT2, /* TCP fin wait 2 (A-syn EQE) */
83 NVMETCP_EVENT_TYPE_TCP_CONN_ERROR, /* NVMeTCP error - tcp error (A-syn EQE) */
93 /* NVMe TCP connection offload params passed by driver to FW in NVMeTCP offload ramrod */
[all …]
/linux-6.8/net/mptcp/
DKconfig3 bool "MPTCP: Multipath TCP"
9 Multipath TCP (MPTCP) connections send and receive data over multiple
11 uses the TCP protocol, and TCP options carry header information for
21 bool "MPTCP: IPv6 support for Multipath TCP"

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