This change adds all the kernel parts of a network stack. The network stack is partial but implements many of the important parts. Add if(4) network interface abstraction. Network interfaces are registered in a global list that can be iterated and each assigned an unique integer identifier. Add reference counted packets with a cache that recycles recent packets. Add support for lo(4) loopback and ether(4) ethernet network interfaces. The /dev/lo0 loopback device is created automatically on boot. Add arp(4) address resolution protocol driver for translation of inet(4) network layer addresses into ether(4) link layer addresses. arp(4) entries are cached and evicted from the cache when needed or when the entry has not been used for a while. The cache is limited to 256 entries for now. Add ip(4) internet protocol version 4 support. IP fragmentation and options are not implemented yet. Add tcp(4) transmission control protocol sockets for a reliable transport layer protocol that provides a reliable byte stream connection between two hosts. The implementation is incomplete and does not yet implement out of band data, options, and high performance extensions. Add udp(4) user datagram protocol sockets for a connectionless transport layer that provides best-effort delivery of datagrams. Add ping(4) sockets for a best-effort delivery of echo datagrams. Change type of sa_family_t from unsigned short to uint16_t. Add --disable-network-drivers to the kernel(7) options and expose it with a bootloader menu. tix-iso-bootconfig can set this option by default. Import CRC32 code from libz for the Ethernet checksum. This is a compatible ABI change that adds features to socket(2) (AF_INET, IPPROTO_TCP, IPPROTO_UDP, IPPROTO_PING), the ioctls for if(4), socket options, and the lo0 loopback interface. This commit is based on work by Meisaka Yukara contributed as the commit bbf7f1e8a5238a2bd1fe8eb1d2cc5c9c2421e2c4. Almost no lines of this work remains in this final commit as it has been rewritten or refactored away over the years, see the individual file headers for which files contain remnants of this work. Co-authored-by: Meisaka Yukara <Meisaka.Yukara@gmail.com>
194 lines
6.2 KiB
C
194 lines
6.2 KiB
C
/*
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* Copyright (c) 2013, 2014, 2015, 2016, 2017 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* netinet/in.h
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* Internet socket interface.
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*/
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#ifndef _INCLUDE_NETINET_IN_H
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#define _INCLUDE_NETINET_IN_H
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#include <sys/cdefs.h>
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#include <sys/__/types.h>
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#include <__/endian.h>
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#include <inttypes.h>
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#ifndef __in_port_t_defined
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#define __in_port_t_defined
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typedef uint16_t in_port_t;
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#endif
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#ifndef __in_addr_t_defined
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#define __in_addr_t_defined
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typedef uint32_t in_addr_t;
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#endif
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#ifndef __sa_family_t_defined
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#define __sa_family_t_defined
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typedef uint16_t sa_family_t;
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#endif
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#ifndef __socklen_t_defined
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#define __socklen_t_defined
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typedef __socklen_t socklen_t;
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#endif
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struct in_addr
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{
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in_addr_t s_addr;
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};
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struct sockaddr_in
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{
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sa_family_t sin_family;
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in_port_t sin_port;
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struct in_addr sin_addr;
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};
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struct __attribute__((aligned(4))) in6_addr
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{
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uint8_t s6_addr[16];
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};
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struct sockaddr_in6
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{
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sa_family_t sin6_family;
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in_port_t sin6_port;
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uint32_t sin6_flowinfo;
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struct in6_addr sin6_addr;
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uint32_t sin6_scope_id;
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};
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#define IN6ADDR_ANY_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } }
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#define IN6ADDR_LOOPBACK_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } }
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struct ipv6_mreq
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{
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struct in6_addr ipv6mr_multiaddr;
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unsigned int ipv6mr_interface;
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};
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/* #define SOL_SOCKET 0 - in <sys/socket.h> */
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#define IPPROTO_ICMP 1
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#define IPPROTO_TCP 6
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#define IPPROTO_UDP 17
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#define IPPROTO_RAW 255
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#define IPPROTO_IP 256
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#define IPPROTO_IPV6 257
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#define IPPROTO_PING 258
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#define INADDR_ANY ((in_addr_t) 0x00000000) /* 0.0.0.0 */
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#define INADDR_BROADCAST ((in_addr_t) 0xffffffff) /* 255.255.255.255 */
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#define INADDR_LOOPBACK ((in_addr_t) 0x7f000001) /* 127.0.0.1 */
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#define INADDR_NONE ((in_addr_t) 0xffffffff) /* 255.255.255.255 */
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#if __USE_SORTIX
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#define INADDR_LOOPMASK ((in_addr_t) 0xff000000) /* 255.0.0.0 */
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#endif
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#define INADDR_UNSPEC_GROUP ((in_addr_t) 0xe0000000)
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#define INADDR_ALLHOSTS_GROUP ((in_addr_t) 0xe0000001)
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#define INADDR_ALLRTRS_GROUP ((in_addr_t) 0xe0000002)
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#define INADDR_MAX_LOCAL_GROUP ((in_addr_t) 0xe00000ff)
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#define INET_ADDRSTRLEN 16
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#define INET6_ADDRSTRLEN 46
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#define htons(x) __htobe16(x)
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#define ntohs(x) __be16toh(x)
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#define htonl(x) __htobe32(x)
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#define ntohl(x) __be32toh(x)
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#define IPV6_JOIN_GROUP 0
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#define IPV6_LEAVE_GROUP 1
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#define IPV6_MULTICAST_HOPS 2
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#define IPV6_MULTICAST_IF 3
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#define IPV6_MULTICAST_LOOP 4
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#define IPV6_UNICAST_HOPS 5
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#define IPV6_V6ONLY 6
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#define IN6_IS_ADDR_UNSPECIFIED(a) \
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(((uint32_t*) (a))[0] == 0 && ((uint32_t*) (a))[1] == 0 && \
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((uint32_t*) (a))[2] == 0 && ((uint32_t*) (a))[3] == 0)
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#define IN6_IS_ADDR_LOOPBACK(a) \
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(((uint32_t*) (a))[0] == 0 && ((uint32_t*) (a))[1] == 0 && \
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((uint32_t*) (a))[2] == 0 && \
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((uint8_t*) (a))[12] == 0 && ((uint8_t*) (a))[13] == 0 && \
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((uint8_t*) (a))[14] == 0 && ((uint8_t*) (a))[15] == 1 )
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#define IN6_IS_ADDR_MULTICAST(a) (((uint8_t*) (a))[0] == 0xff)
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#define IN6_IS_ADDR_LINKLOCAL(a) \
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((((uint8_t*) (a))[0]) == 0xfe && (((uint8_t*) (a))[1] & 0xc0) == 0x80)
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#define IN6_IS_ADDR_SITELOCAL(a) \
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((((uint8_t*) (a))[0]) == 0xfe && (((uint8_t*) (a))[1] & 0xc0) == 0xc0)
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#define IN6_IS_ADDR_V4MAPPED(a) \
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(((uint32_t*) (a))[0] == 0 && ((uint32_t*) (a))[1] == 0 && \
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((uint8_t*) (a))[8] == 0 && ((uint8_t*) (a))[9] == 0 && \
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((uint8_t*) (a))[10] == 0xff && ((uint8_t*) (a))[11] == 0xff)
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#define IN6_IS_ADDR_V4COMPAT(a) \
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(((uint32_t*) (a))[0] == 0 && ((uint32_t*) (a))[1] == 0 && \
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((uint32_t*) (a))[2] == 0 && ((uint8_t*) (a))[15] > 1)
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#define IN6_IS_ADDR_MC_NODELOCAL(a) \
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(IN6_IS_ADDR_MULTICAST(a) && ((((uint8_t*) (a))[1] & 0xf) == 0x1))
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#define IN6_IS_ADDR_MC_LINKLOCAL(a) \
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(IN6_IS_ADDR_MULTICAST(a) && ((((uint8_t*) (a))[1] & 0xf) == 0x2))
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#define IN6_IS_ADDR_MC_SITELOCAL(a) \
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(IN6_IS_ADDR_MULTICAST(a) && ((((uint8_t*) (a))[1] & 0xf) == 0x5))
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#define IN6_IS_ADDR_MC_ORGLOCAL(a) \
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(IN6_IS_ADDR_MULTICAST(a) && ((((uint8_t*) (a))[1] & 0xf) == 0x8))
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#define IN6_IS_ADDR_MC_GLOBAL(a) \
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(IN6_IS_ADDR_MULTICAST(a) && ((((uint8_t*) (a))[1] & 0xf) == 0xe))
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#define __ARE_4_EQUAL(a,b) \
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(!( (0[a]-0[b]) | (1[a]-1[b]) | (2[a]-2[b]) | (3[a]-3[b]) ))
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#define IN6_ARE_ADDR_EQUAL(a,b) \
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__ARE_4_EQUAL((const uint32_t*)(a), (const uint32_t*)(b))
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#define IN_CLASSA(a) ((((in_addr_t)(a)) & 0x80000000) == 0)
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#define IN_CLASSA_NET 0xff000000
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#define IN_CLASSA_NSHIFT 24
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#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
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#define IN_CLASSA_MAX 128
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#define IN_CLASSB(a) ((((in_addr_t)(a)) & 0xc0000000) == 0x80000000)
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#define IN_CLASSB_NET 0xffff0000
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#define IN_CLASSB_NSHIFT 16
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#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
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#define IN_CLASSB_MAX 65536
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#define IN_CLASSC(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xc0000000)
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#define IN_CLASSC_NET 0xffffff00
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#define IN_CLASSC_NSHIFT 8
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#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
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#define IN_CLASSD(a) ((((in_addr_t)(a)) & 0xf0000000) == 0xe0000000)
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#define IN_MULTICAST(a) IN_CLASSD(a)
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#define IN_EXPERIMENTAL(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xe0000000)
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#define IN_BADCLASS(a) ((((in_addr_t)(a)) & 0xf0000000) == 0xf0000000)
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#define IN_LOOPBACKNET 127
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#define IP_EVIL_INTENT 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern const struct in6_addr in6addr_any; /* :: */
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extern const struct in6_addr in6addr_loopback; /* ::1 */
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif
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