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/linux/Documentation/networking/
H A Dnetconsole.rst1 .. SPDX-License-Identifier: GPL-2.0
28 This module logs kernel printk messages over UDP allowing debugging of
31 It can be used either built-in or as a module. As a built-in,
43 netconsole=[+][r][src-port]@[src-ip]/[<dev>],[tgt-port]@<tgt-ip>/[tgt-macaddr]
48 src-port source for UDP packets (defaults to 6665)
49 src-ip source IP to use (interface address)
51 tgt-port port for logging agent (6666)
52 tgt-ip IP address for logging agent
53 tgt-macaddr ethernet MAC address for logging agent (broadcast)
77 Built-in netconsole starts immediately after the TCP stack is
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/linux/net/ipv4/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
40 so-called IP spoofing, however it can pose problems if you use
42 than packets from that host to you) or if you operate a non-routing
52 <file:Documentation/networking/ip-sysctl.rst>.
71 address into account. Furthermore, the TOS (Type-Of-Service) field
89 equal "cost" and chooses one of them in a non-deterministi
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H A Dudp_tunnel_core.c1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <net/udp.h>
23 if (cfg->bind_ifindex) { in udp_sock_create4()
24 err = sock_bindtoindex(sock->sk, cfg->bind_ifindex, true); in udp_sock_create4()
30 udp_addr.sin_addr = cfg->local_ip; in udp_sock_create4()
31 udp_addr.sin_port = cfg->local_udp_por in udp_sock_create4()
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H A Dfou_core.c1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <linux/udp.h>
17 #include <net/udp.h>
58 /* Remove 'len' bytes from the packet (UDP header and in fou_recv_pull()
61 if (fou->family == AF_INET) in fou_recv_pull()
62 ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(skb)->tot_le in fou_recv_pull()
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H A Dip_output.c1 // SPDX-License-Identifier: GPL-2.0-only
39 * silently drop skb instead of failing with -EPERM.
41 * Hirokazu Takahashi: HW checksumming for outgoing UDP
43 * Hirokazu Takahashi: sendfile() on UDP works now.
81 #include <linux/bpf-cgroup.h>
97 iph->check = 0; in ip_send_check()
98 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); in ip_send_check()
108 iph_set_totlen(iph, skb->len); in __ip_local_out()
118 skb->protocol = htons(ETH_P_IP); in __ip_local_out()
140 int ttl = READ_ONCE(inet->uc_ttl); in ip_select_ttl()
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/linux/net/ipv6/
H A Dip6_udp_tunnel.c2 // SPDX-License-Identifier: GPL-2.0-only
6 #include <linux/udp.h>
10 #include <net/udp.h>
28 if (cfg->ipv6_v6only) { in udp_sock_create6()
29 err = ip6_sock_set_v6only(sock->sk); in udp_sock_create6()
33 if (cfg->bind_ifindex) { in udp_sock_create6()
34 err = sock_bindtoindex(sock->sk, cfg->bind_ifindex, true); in udp_sock_create6()
40 memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6, in udp_sock_create6()
42 udp6_addr.sin6_port = cfg->local_udp_port; in udp_sock_create6()
48 if (cfg->peer_udp_port) { in udp_sock_create6()
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H A Dfou6.c1 // SPDX-License-Identifier: GPL-2.0-only
7 #include <linux/udp.h>
16 #include <net/udp.h>
31 uh->dest = e->dport; in fou6_build_udp()
32 uh->source = sport; in fou6_build_udp()
33 uh->len = htons(skb->len); in fou6_build_udp()
34 udp6_set_csum(!(e->flags & TUNNEL_ENCAP_FLAG_CSUM6), skb, in fou6_build_udp()
35 &fl6->saddr, &fl6->daddr, skb->len); in fou6_build_udp()
45 int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM6 ? in fou6_build_header()
62 int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM6 ? in gue6_build_header()
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/linux/include/net/
H A Dgro.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
11 #include <net/udp.h>
20 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
36 /* This indicates where we are processing relative to skb->data. */
39 /* This is non-zero if the packet cannot be merged with the new skb. */
45 /* Used in ipv6_gro_receive() and foo
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/linux/Documentation/admin-guide/
H A Dkernel-parameters.txt16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nocmcff -- Disable firmware first mode for corrected
28 nospcr -- disable console in ACPI SPCR table as
45 If set to vendor, prefer vendor-specific driver
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/linux/net/netfilter/
H A Dnf_conntrack_proto_tcp.c1 // SPDX-License-Identifier: GPL-2.0-only
2 /* (C) 1999-2001 Paul `Rusty' Russell
3 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
4 * (C) 2002-2013 Jozsef Kadlecsik <kadlec@netfilter.org>
5 * (C) 2006-2012 Patrick McHardy <kaber@trash.net>
35 closely. They're more complex. --RR */
73 to ~13-30min depending on RTO. */
116 * SYN_SENT: SYN-only packet seen
117 * SYN_SENT2: SYN-only packet seen from reply dir, simultaneous open
118 * SYN_RECV: SYN-ACK packet seen
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/linux/drivers/net/ethernet/natsemi/
H A Dns83820.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Questions/comments/discussion to linux-ns83820@kvack.org.
16 * 20010414 0.1 - created
17 * 20010622 0.2 - basic rx and tx.
18 * 20010711 0.3 - added duplex and link state detection support.
19 * 20010713 0.4 - zero copy, no hangs.
20 * 0.5 - 64 bit dma support (davem will hate me for this)
21 * - disable jumbo frames to avoid tx hangs
22 * - work around tx deadlocks on my 1.02 card via
24 * 20010810 0.6 - use pci dma api for ringbuffers, work on ia64
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/linux/drivers/net/ethernet/sun/
H A Dsunhme.c1 // SPDX-License-Identifier: GPL-2.0
10 * 2000/11/11 Willy Tarreau <willy AT meta-x.org>
11 * - port to non-sparc architectures. Tested only on x86 and
13 * - ability to specify the MAC address at module load time by passing this
20 #include <linux/dma-mapping.h>
111 tlp->tstamp = (unsigned int)jiffies;
112 tlp->tx_new = hp->tx_new;
113 tlp->tx_old = hp->tx_old;
114 tlp->action = a;
115 tlp->status = s;
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