#include <core/system.h>
#include <net/netbuf.h>
#include <net/netif.h>
#include <aquila/socket.h>

Data Structures
struct	ether_hdr
	An Ethernet frame's header. More...
struct	arp_hdr
	An ARP packet, for IPv4 over Ethernet. More...
struct	ipv4_hdr
	An IPv4 packet's header. More...
struct	icmp_hdr
	An ICMP message's header. More...
struct	udp_hdr
	A UDP datagram's header. More...

Macros
#define	ETHER_TYPE_IPV4 0x0800
#define	ETHER_TYPE_ARP 0x0806
#define	IP_PROTO_ICMP 1
#define	IP_PROTO_TCP 6
#define	IP_PROTO_UDP 17
#define	ICMP_ECHO_REPLY 0
#define	ICMP_UNREACH 3
#define	ICMP_ECHO_REQUEST 8
#define	ICMP_UNREACH_HOST 1
#define	ICMP_UNREACH_PORT 3

Functions
uint16_t	inet_checksum (const void *data, size_t len)
	Computes the Internet checksum (RFC 1071): the ones' complement of the ones' complement sum of the data's 16-bit words.
uint16_t	inet_checksum_pseudo (uint32_t src, uint32_t dst, uint8_t proto, const void *data, size_t len)
	Computes the Internet checksum of data with the IPv4 pseudo-header before it (the addresses, the protocol and the length), as UDP and TCP do.
void	ether_input (struct netif netif, struct netbuf nb)
	Takes in a frame that an interface received, and passes it to ARP or IPv4.
int	ether_output (struct netif netif, const uint8_t dst[6], uint16_t type, struct netbuf nb)
	Sends a frame: adds its Ethernet header and gives it to the interface.
void	arp_input (struct netif netif, struct netbuf nb)
	Takes in an ARP packet: the sender's address is recorded, and a request for our address is answered.
void	arp_update (struct netif *netif, uint32_t ip, const uint8_t mac[6])
	Records an address's hardware address, replacing the oldest entry if the table is full, and sends the packets that waited for it.
int	arp_lookup (struct netif *netif, uint32_t ip, uint8_t mac[6])
	Looks up an address's hardware address.
int	arp_resolve (struct netif netif, uint32_t ip, struct netbuf nb)
	Holds a packet until the hardware address of its next hop is known, and asks for it.
void	ipv4_input (struct netif netif, struct netbuf nb, const uint8_t src_mac[6])
	Takes in an IPv4 packet that an interface received, and passes it to its protocol.
int	ipv4_output (struct netif netif, uint32_t src, uint32_t dst, uint8_t proto, struct netbuf nb)
	Sends a packet through an interface: adds its IPv4 header and sends it to dst, or to the gateway if dst isn't on the link, once ARP knows the hardware address.
uint32_t	ipv4_source (struct netif *netif, uint32_t dst)
	Chooses the source address of a packet to dst sent through netif.
int	ipv4_send (uint32_t dst, uint8_t proto, struct netbuf *nb)
	Sends a packet to dst, through the interface its route says.
struct netif *	ipv4_route (uint32_t dst)
	Chooses the interface to send a packet to dst through: the one whose link it is on, or else the first one with a gateway.
int	ipv4_is_local (uint32_t ip)
	Says whether an address is one of ours: a loopback address, or an interface's.
void	icmp_input (struct netif netif, struct netbuf nb, uint32_t src, uint32_t dst)
	Takes in an ICMP message that IPv4 received.
void	icmp_unreachable (struct netif netif, const struct ipv4_hdr ih, int code)
	Tells the sender of a datagram that it couldn't get where it was sent.
void	udp_input (struct netif netif, struct netbuf nb, const struct ipv4_hdr *ih)
	Takes in a UDP datagram that IPv4 received, and delivers it to its socket.
struct inet_sock *	inet_sock_find (struct netif *netif, uint8_t proto, uint32_t local, uint16_t port, uint32_t remote, uint16_t remote_port)
	Finds the socket that a received datagram is for: a socket connected to its sender first, or else one that isn't connected.
void	inet_sock_deliver (struct inet_sock sock, struct netbuf nb)
	Queues a received datagram on its socket, and wakes up its readers.
void	inet_sock_error (struct inet_sock *sock, int err)
	Gives a socket an error (from ICMP), which its next call reports.
int	inet_sockaddr_get (const struct sockaddr addr, socklen_t len, uint32_t ip, uint16_t *port)
	Reads an AF_INET address.
void	inet_sockaddr_put (struct sockaddr addr, socklen_t len, uint32_t ip, uint16_t port)
	Writes an AF_INET address, cut to *len bytes if it doesn't fit.
int	inet_ifioctl (int request, void *argp)
	Handles an interface ioctl() request on an AF_INET socket.

Macro Definition Documentation

◆ ETHER_TYPE_ARP

#define ETHER_TYPE_ARP 0x0806

Definition at line 18 of file inet.h.

Referenced by arp_input(), arp_request(), and ether_input().

◆ ETHER_TYPE_IPV4

#define ETHER_TYPE_IPV4 0x0800

Definition at line 17 of file inet.h.

Referenced by arp_input(), arp_request(), ether_input(), ipv4_output(), and pending_flush().

◆ ICMP_ECHO_REPLY

#define ICMP_ECHO_REPLY 0

Definition at line 60 of file inet.h.

Referenced by icmp_input().

◆ ICMP_ECHO_REQUEST

#define ICMP_ECHO_REQUEST 8

Definition at line 62 of file inet.h.

Referenced by icmp_input(), and socket_inet_send().

◆ ICMP_UNREACH

#define ICMP_UNREACH 3

Definition at line 61 of file inet.h.

Referenced by icmp_input(), and icmp_unreachable().

◆ ICMP_UNREACH_HOST

#define ICMP_UNREACH_HOST 1

Definition at line 64 of file inet.h.

◆ ICMP_UNREACH_PORT

#define ICMP_UNREACH_PORT 3

Definition at line 65 of file inet.h.

Referenced by icmp_unreachable_input(), and udp_input().

◆ IP_PROTO_ICMP

#define IP_PROTO_ICMP 1

Definition at line 41 of file inet.h.

Referenced by icmp_input(), icmp_unreachable(), inet_sock_find(), ipv4_input(), and socket_inet_create().

◆ IP_PROTO_TCP

#define IP_PROTO_TCP 6

Definition at line 42 of file inet.h.

Referenced by ipv4_input(), segment(), tcp_input(), and tcp_reply_rst().

◆ IP_PROTO_UDP

#define IP_PROTO_UDP 17

Definition at line 43 of file inet.h.

Referenced by icmp_unreachable_input(), ipv4_input(), socket_inet_bind(), socket_inet_connect(), socket_inet_create(), socket_inet_send(), and udp_input().

Function Documentation

◆ arp_input()

void arp_input	(	struct netif *	netif,
		struct netbuf *	nb )

Takes in an ARP packet: the sender's address is recorded, and a request for our address is answered.

Parameters

netif	the interface it came in on
nb	the packet; it is freed or turned into the reply

Definition at line 244 of file arp.c.

References arp_input(), arp_update(), netbuf::data, ether_output(), ETHER_TYPE_ARP, ETHER_TYPE_IPV4, arp_hdr::hlen, htons, arp_hdr::htype, netif::ip, netbuf::len, netif::mac, memcpy(), netbuf_free(), ntohs, arp_hdr::op, arp_hdr::plen, arp_hdr::ptype, arp_hdr::sha, arp_hdr::spa, netif::stats, arp_hdr::tha, and arp_hdr::tpa.

Referenced by arp_input(), and ether_input().

◆ arp_lookup()

int arp_lookup	(	struct netif *	netif,
		uint32_t	ip,
		uint8_t	mac[6] )

Looks up an address's hardware address.

An entry that has expired is dropped, so that the address is asked for again.

Parameters

netif	the interface
ip	the IPv4 address
mac	set to the hardware address, if it is known

Returns: 0 if it is known, or -1

Definition at line 218 of file arp.c.

References arch_rtime_ms(), ARP_ENTRIES, ARP_EXPIRE, arp_lookup(), arp_entry::heard, arp_entry::ip, arp_entry::mac, memcpy(), arp_entry::netif, NULL, and table().

Referenced by arp_lookup(), and ipv4_output().

◆ arp_resolve()

int arp_resolve	(	struct netif *	netif,
		uint32_t	ip,
		struct netbuf *	nb )

Holds a packet until the hardware address of its next hop is known, and asks for it.

If too many packets wait for that address, the oldest is dropped. The netbuf is ARP's from now on.

Parameters

netif	the interface to send it on
ip	the next hop's address
nb	the IPv4 packet

Returns: 0, or -ENOBUFS if too many addresses are being asked for already (the packet is dropped)

Definition at line 118 of file arp.c.

References ARP_HOLD, ARP_PENDING, arp_request(), arp_resolve(), arp_retry(), arp_pending::held, arp_pending::ip, memmove(), net_callout_set(), netbuf_free(), arp_pending::netif, arp_pending::nheld, NULL, pending, arp_pending::retry, netif::stats, and arp_pending::tries.

Referenced by arp_resolve(), and ipv4_output().

◆ arp_update()

void arp_update	(	struct netif *	netif,
		uint32_t	ip,
		const uint8_t	mac[6] )

Records an address's hardware address, replacing the oldest entry if the table is full, and sends the packets that waited for it.

Parameters

netif	the interface it was heard on
ip	the IPv4 address
mac	its hardware address

Definition at line 185 of file arp.c.

References arch_rtime_ms(), ARP_ENTRIES, arp_update(), clock, arp_entry::heard, arp_entry::ip, arp_entry::mac, memcpy(), arp_entry::netif, pending_flush(), table(), arp_entry::used, and used.

Referenced by arp_input(), arp_update(), and ipv4_input().

◆ ether_input()

void ether_input	(	struct netif *	netif,
		struct netbuf *	nb )

Takes in a frame that an interface received, and passes it to ARP or IPv4.

A frame of another type, or too short, is dropped.

Parameters

netif	the interface it came in on
nb	the frame; it is freed or passed on

Definition at line 21 of file ether.c.

References arp_input(), ether_input(), ETHER_TYPE_ARP, ETHER_TYPE_IPV4, ipv4_input(), netbuf_free(), netbuf_pull(), ntohs, ether_hdr::src, netif::stats, and ether_hdr::type.

Referenced by ether_input(), and net_main().

◆ ether_output()

int ether_output	(	struct netif *	netif,
		const uint8_t	dst[6],
		uint16_t	type,
		struct netbuf *	nb )

Sends a frame: adds its Ethernet header and gives it to the interface.

The netbuf is freed in every case.

Parameters

netif	the interface to send it on
dst	the destination MAC address
type	the frame's type (ETHER_TYPE_*)
nb	the frame's data, with room for the header before it

Returns: 0, or a negative errno from the interface

Definition at line 54 of file ether.c.

References ether_hdr::dst, ether_output(), htons, netif::mac, memcpy(), netbuf_free(), netbuf_push(), netif_output(), ether_hdr::src, and ether_hdr::type.

Referenced by arp_input(), arp_request(), ether_output(), ipv4_output(), and pending_flush().

◆ icmp_input()

void icmp_input	(	struct netif *	netif,
		struct netbuf *	nb,
		uint32_t	src,
		uint32_t	dst )

Takes in an ICMP message that IPv4 received.

Parameters

netif	the interface it came in on
nb	the message, from its ICMP header; it is freed, sent back or delivered
src	the sender's address
dst	the address it was sent to

Definition at line 50 of file icmp.c.

References icmp_hdr::checksum, icmp_hdr::code, netbuf::data, ICMP_ECHO_REPLY, ICMP_ECHO_REQUEST, icmp_input(), ICMP_UNREACH, icmp_unreachable_input(), icmp_hdr::id, inet_checksum(), inet_sock_deliver(), inet_sock_find(), IP_PROTO_ICMP, ipv4_is_local(), ipv4_output(), netbuf::len, netbuf_free(), netbuf::src_ip, netbuf::src_port, netif::stats, and icmp_hdr::type.

Referenced by icmp_input(), and ipv4_input().

◆ icmp_unreachable()

void icmp_unreachable	(	struct netif *	netif,
		const struct ipv4_hdr *	ih,
		int	code )

Tells the sender of a datagram that it couldn't get where it was sent.

Parameters

netif	the interface the datagram came in on
ih	the datagram's IPv4 header, with its payload after it
code	why (ICMP_UNREACH_*)

Definition at line 105 of file icmp.c.

References icmp_hdr::checksum, icmp_hdr::code, ICMP_UNREACH, icmp_unreachable(), icmp_hdr::id, inet_checksum(), IP_PROTO_ICMP, ipv4_output(), ipv4_hdr::len, memcpy(), netbuf_alloc(), ntohs, icmp_hdr::seq, ipv4_hdr::src, icmp_hdr::type, and ipv4_hdr::ver_ihl.

Referenced by icmp_unreachable(), ipv4_input(), and udp_input().

◆ inet_checksum()

uint16_t inet_checksum	(	const void *	data,
		size_t	len )

Computes the Internet checksum (RFC 1071): the ones' complement of the ones' complement sum of the data's 16-bit words.

Parameters

data	the data
len	its length, in bytes

Returns: the checksum, in network byte order (0 if the data includes a correct checksum)

Definition at line 76 of file ether.c.

References htons, and inet_checksum().

Referenced by icmp_input(), icmp_unreachable(), inet_checksum(), ipv4_input(), ipv4_output(), and socket_inet_send().

◆ inet_checksum_pseudo()

uint16_t inet_checksum_pseudo	(	uint32_t	src,
		uint32_t	dst,
		uint8_t	proto,
		const void *	data,
		size_t	len )

Computes the Internet checksum of data with the IPv4 pseudo-header before it (the addresses, the protocol and the length), as UDP and TCP do.

Parameters

src	the source address
dst	the destination address
proto	the protocol (IP_PROTO_*)
data	the UDP or TCP header and data
len	their length, in bytes

Returns: the checksum, in network byte order (0 if the data includes a correct checksum)

Definition at line 106 of file ether.c.

References __packed, ether_hdr::dst, htons, inet_checksum_pseudo(), and ether_hdr::src.

Referenced by inet_checksum_pseudo(), segment(), socket_inet_send(), tcp_input(), tcp_reply_rst(), and udp_input().

◆ inet_ifioctl()

int inet_ifioctl	(	int	request,
		void *	argp )

Handles an interface ioctl() request on an AF_INET socket.

Parameters

request	the request (SIOC*)
argp	its argument, in user memory

Returns: 0, or a negative errno: -ENOTTY for another request, -EPERM to set something without being root, -ENODEV for no such interface, or -EFAULT

Definition at line 153 of file ifioctl.c.

References curproc, ifconf(), ifreq_request(), inet_ifioctl(), and route().

Referenced by inet_ifioctl(), socket_inet_ioctl(), and socket_tcp_ioctl().

◆ inet_sock_deliver()

void inet_sock_deliver	(	struct inet_sock *	sock,
		struct netbuf *	nb )

Queues a received datagram on its socket, and wakes up its readers.

The datagram is dropped if the socket's queue is full or reading is shut down. The netbuf is the socket's from now on.

Parameters

sock	the socket
nb	the datagram's data, with src_ip and src_port set

Definition at line 185 of file socket.c.

References inet_sock_deliver(), netbuf_free(), NETBUF_SIZE, netbuf::next, NULL, inet_sock::recv_bytes, inet_sock::recv_head, RECV_MAX, inet_sock::recv_tail, inet_sock::recv_wait, inet_sock::shut_rd, and waitq_wakeup().

Referenced by icmp_input(), inet_sock_deliver(), and udp_input().

◆ inet_sock_error()

void inet_sock_error	(	struct inet_sock *	sock,
		int	err )

Gives a socket an error (from ICMP), which its next call reports.

Parameters

sock	the socket
err	the error (a positive errno)

Definition at line 211 of file socket.c.

References inet_sock::error, inet_sock_error(), inet_sock::recv_wait, and waitq_wakeup().

Referenced by icmp_unreachable_input(), and inet_sock_error().

◆ inet_sock_find()

struct inet_sock * inet_sock_find	(	struct netif *	netif,
		uint8_t	proto,
		uint32_t	local,
		uint16_t	port,
		uint32_t	remote,
		uint16_t	remote_port )

Finds the socket that a received datagram is for: a socket connected to its sender first, or else one that isn't connected.

A socket bound to another interface doesn't count. For ping sockets, the remote port doesn't count.

Parameters

netif	the interface it came in on
proto	IP_PROTO_UDP or IP_PROTO_ICMP
local	the address it was sent to
port	the port it was sent to (a ping's identifier)
remote	the sender's address
remote_port	the sender's port

Returns: the socket, or NULL

Definition at line 154 of file socket.c.

References bound, inet_sock_find(), IP_PROTO_ICMP, inet_sock::next, NULL, and inet_sock::proto.

Referenced by icmp_input(), icmp_unreachable_input(), inet_sock_find(), and udp_input().

◆ inet_sockaddr_get()

int inet_sockaddr_get	(	const struct sockaddr *	addr,
		socklen_t	len,
		uint32_t *	ip,
		uint16_t *	port )

Reads an AF_INET address.

Parameters

addr	the address, in the kernel's memory
len	its size
ip	set to its IPv4 address
port	set to its port

Returns: 0, -EINVAL if it's too short, or -EAFNOSUPPORT

Definition at line 283 of file socket.c.

References inet_sockaddr_get().

Referenced by inet_sockaddr_get(), socket_inet_bind(), socket_inet_connect(), socket_inet_send(), socket_tcp_bind(), and socket_tcp_connect().

◆ inet_sockaddr_put()

void inet_sockaddr_put	(	struct sockaddr *	addr,
		socklen_t *	len,
		uint32_t	ip,
		uint16_t	port )

Writes an AF_INET address, cut to *len bytes if it doesn't fit.

Parameters

addr	where to write it
len	its room, set to the address's full size
ip	the IPv4 address
port	the port

Definition at line 306 of file socket.c.

References inet_sockaddr_put(), memcpy(), and MIN.

Referenced by inet_sockaddr_put(), socket_inet_getname(), socket_inet_recv(), socket_tcp_accept(), socket_tcp_getname(), and socket_tcp_recv().

◆ ipv4_input()

void ipv4_input	(	struct netif *	netif,
		struct netbuf *	nb,
		const uint8_t	src_mac[6] )

Takes in an IPv4 packet that an interface received, and passes it to its protocol.

A packet that is malformed, not for us, or a fragment is dropped; one for a protocol we don't have gets a "protocol unreachable".

Parameters

netif	the interface it came in on
nb	the packet, from its IPv4 header; it is freed or passed on
src_mac	the sender's MAC address, to update ARP's cache

Definition at line 84 of file ipv4.c.

References arp_update(), netbuf::data, ipv4_hdr::dst, netif::flags, ipv4_hdr::frag, icmp_input(), icmp_unreachable(), inet_checksum(), netif::ip, IP_PROTO_ICMP, IP_PROTO_TCP, IP_PROTO_UDP, ipv4_input(), ipv4_is_local(), is_broadcast(), ipv4_hdr::len, netbuf::len, netbuf_free(), netbuf_pull(), NETIF_LOOPBACK, ntohs, on_link(), ipv4_hdr::proto, ipv4_hdr::src, netif::stats, tcp_input(), udp_input(), and ipv4_hdr::ver_ihl.

Referenced by ether_input(), ipv4_input(), and net_main().

◆ ipv4_is_local()

int ipv4_is_local ( uint32_t ip )

Says whether an address is one of ours: a loopback address, or an interface's.

Parameters

ip	the address, in network byte order

Returns: 1 if it is ours, 0 if not

Definition at line 48 of file ipv4.c.

References netif::ip, ipv4_is_local(), is_loopback(), netifs, and netif::next.

Referenced by icmp_input(), ipv4_input(), ipv4_is_local(), ipv4_output(), ipv4_source(), socket_inet_bind(), socket_tcp_bind(), tcp_input(), and udp_input().

◆ ipv4_output()

int ipv4_output	(	struct netif *	netif,
		uint32_t	src,
		uint32_t	dst,
		uint8_t	proto,
		struct netbuf *	nb )

Sends a packet through an interface: adds its IPv4 header and sends it to dst, or to the gateway if dst isn't on the link, once ARP knows the hardware address.

A packet to one of our own addresses loops back. The netbuf is freed (or kept by ARP until it can be sent).

Parameters

netif	the interface
src	the source address, or 0 for ipv4_source()'s
dst	the destination
proto	the protocol (IP_PROTO_*)
nb	the payload, with room for the headers before it

Returns: 0, -ENETUNREACH if there is no gateway to send it through, or a negative errno from the interface

Definition at line 190 of file ipv4.c.

References arp_lookup(), arp_resolve(), ipv4_hdr::checksum, ipv4_hdr::dst, ether_broadcast, ether_output(), ETHER_TYPE_IPV4, ipv4_hdr::frag, netif::gateway, htons, ipv4_hdr::id, inet_checksum(), ip_id, ipv4_is_local(), ipv4_output(), ipv4_source(), is_broadcast(), ipv4_hdr::len, netbuf::len, netbuf_free(), netbuf_push(), netif_loopback(), on_link(), ipv4_hdr::proto, ipv4_hdr::src, netif::stats, ipv4_hdr::tos, ipv4_hdr::ttl, and ipv4_hdr::ver_ihl.

Referenced by icmp_input(), icmp_unreachable(), ipv4_output(), ipv4_send(), segment(), socket_inet_send(), and tcp_reply_rst().

◆ ipv4_route()

struct netif * ipv4_route ( uint32_t dst )

Chooses the interface to send a packet to dst through: the one whose link it is on, or else the first one with a gateway.

Parameters

dst	the destination

Returns: the interface, or NULL if there is no route

Definition at line 142 of file ipv4.c.

References netif::flags, netif::gateway, netif::ip, ipv4_route(), is_loopback(), NETIF_LOOPBACK, NETIF_UP, netifs, netif::next, NULL, and on_link().

Referenced by ipv4_route(), ipv4_send(), our_mss(), segment(), set_mss(), socket_inet_send(), and socket_tcp_connect().

◆ ipv4_send()

int ipv4_send	(	uint32_t	dst,
		uint8_t	proto,
		struct netbuf *	nb )

Sends a packet to dst, through the interface its route says.

The netbuf is freed.

Parameters

dst	the destination
proto	the protocol (IP_PROTO_*)
nb	the payload, with room for the headers before it

Returns: 0, -ENETUNREACH if there is no route, or a negative errno

Definition at line 244 of file ipv4.c.

References ipv4_output(), ipv4_route(), ipv4_send(), and netbuf_free().

Referenced by ipv4_send().

◆ ipv4_source()

uint32_t ipv4_source	(	struct netif *	netif,
		uint32_t	dst )

Chooses the source address of a packet to dst sent through netif.

A packet to one of our own addresses (127.0.0.0/8 too) is sent from that address; any other is sent from the interface's.

Parameters

netif	the interface it is sent through
dst	its destination

Returns: the source address

Definition at line 69 of file ipv4.c.

References netif::ip, ipv4_is_local(), and ipv4_source().

Referenced by ipv4_output(), ipv4_source(), socket_inet_send(), and socket_tcp_connect().

◆ udp_input()

void udp_input	(	struct netif *	netif,
		struct netbuf *	nb,
		const struct ipv4_hdr *	ih )

Takes in a UDP datagram that IPv4 received, and delivers it to its socket.

A datagram with a bad length or checksum is dropped.

Parameters

netif	the interface it came in on
nb	the datagram, from its UDP header; it is freed or given to the socket
ih	the IPv4 header it came with

Definition at line 24 of file udp.c.

References udp_hdr::checksum, netbuf::data, ipv4_hdr::dst, udp_hdr::dst, ICMP_UNREACH_PORT, icmp_unreachable(), inet_checksum_pseudo(), inet_sock_deliver(), inet_sock_find(), IP_PROTO_UDP, ipv4_is_local(), netbuf::len, udp_hdr::len, netbuf_free(), netbuf_pull(), ntohs, ipv4_hdr::src, udp_hdr::src, netbuf::src_ip, netbuf::src_port, netif::stats, and udp_input().

Referenced by ipv4_input(), and udp_input().

Data Structures

Macros

Functions

Macro Definition Documentation

◆ ETHER_TYPE_ARP

◆ ETHER_TYPE_IPV4

◆ ICMP_ECHO_REPLY

◆ ICMP_ECHO_REQUEST

◆ ICMP_UNREACH

◆ ICMP_UNREACH_HOST

◆ ICMP_UNREACH_PORT

◆ IP_PROTO_ICMP

◆ IP_PROTO_TCP

◆ IP_PROTO_UDP

Function Documentation

◆ arp_input()

◆ arp_lookup()

◆ arp_resolve()

◆ arp_update()

◆ ether_input()

◆ ether_output()

◆ icmp_input()

◆ icmp_unreachable()

◆ inet_checksum()

◆ inet_checksum_pseudo()

◆ inet_ifioctl()

◆ inet_sock_deliver()

◆ inet_sock_error()

◆ inet_sock_find()

◆ inet_sockaddr_get()

◆ inet_sockaddr_put()

◆ ipv4_input()

◆ ipv4_is_local()

◆ ipv4_output()

◆ ipv4_route()

◆ ipv4_send()

◆ ipv4_source()

◆ udp_input()