user/iplib/include/iplib/iplib.h - upstream - Git at Google

 /*
  * This file is part of the UCB release of Plan 9. It is subject to the license
  * terms in the LICENSE file found in the top-level directory of this
  * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
  * part of the UCB release of Plan 9, including this file, may be copied,
  * modified, propagated, or distributed except according to the terms contained
  * in the LICENSE file.
  */
 #pragma once

 #include <parlib/common.h>

 __BEGIN_DECLS

 enum
 {
 	ETH_HDR_LEN		= 14,
 	ETH_OFF_DST		= 0,
 	ETH_OFF_SRC		= 6,
 	ETH_OFF_ETYPE		= 12,

 	ETH_ADDR_LEN		= 6,
 	ETH_TYPE_IPV4		= 0x0800,
 	ETH_TYPE_ARP		= 0x0806,
 	ETH_TYPE_IPV6		= 0x86dd,
 	ETH_HTYPE_ETH		= 1,

 	IPV4_HDR_LEN		= 20,
 	IPV4_OFF_LEN		= 2,
 	IPV4_OFF_ID		= 4,
 	IPV4_OFF_TTL		= 8,
 	IPV4_OFF_PROTO		= 9,
 	IPV4_OFF_XSUM		= 10,
 	IPV4_OFF_SRC		= 12,
 	IPV4_OFF_DST		= 16,

 	IPV4_ADDR_LEN		= 4,
 	IP_ICMPPROTO		= 1,
 	IP_IGMPPROTO		= 2,
 	IP_TCPPROTO		= 6,
 	IP_UDPPROTO		= 17,
 	IP_ILPROTO		= 40,

 	UDP_HDR_LEN		= 8,
 	UDP_OFF_SRC_PORT	= 0,
 	UDP_OFF_DST_PORT	= 2,
 	UDP_OFF_LEN		= 4,
 	UDP_OFF_XSUM		= 6,

 	TCP_HDR_LEN		= 20,
 	TCP_OFF_SRC_PORT	= 0,
 	TCP_OFF_DST_PORT	= 2,
 	TCP_OFF_SEQ		= 4,
 	TCP_OFF_ACK		= 8,
 	TCP_OFF_DATA		= 12,
 	TCP_OFF_FL		= 12,
 	TCP_OFF_WIN		= 14,
 	TCP_OFF_XSUM		= 16,

 	ARP_PKT_LEN		= 28,
 	ARP_OFF_HTYPE		= 0,
 	ARP_OFF_PTYPE		= 2,
 	ARP_OFF_HLEN		= 4,
 	ARP_OFF_PLEN		= 5,
 	ARP_OFF_OP		= 6,
 	ARP_OFF_SHA		= 8,
 	ARP_OFF_SPA		= 14,
 	ARP_OFF_THA		= 18,
 	ARP_OFF_TPA		= 24,

 	ARP_OP_REQ		= 1,
 	ARP_OP_RSP		= 2,

 	IPaddrlen=	16,
 	IPv4addrlen=	4,
 	IPv4off=	12,
 	IPllen=		4,
 	IPV4HDR_LEN=	20,

 	/* vihl & vcf[0] values */
 	IP_VER4= 	0x40,
 	IP_VER6=	0x60,
 	NETPATHLEN=	40,
 };

 /*
  *  for reading /net/ipifc
  */

 /* local address */
 struct iplifc
 {
 	struct iplifc	*next;

 	/* per address on the ip interface */
 	uint8_t	ip[IPaddrlen];
 	uint8_t	mask[IPaddrlen];
 	uint8_t	net[IPaddrlen];		/* ip & mask */
 	uint32_t	preflt;			/* preferred lifetime */
 	uint32_t	validlt;		/* valid lifetime */
 };

 /* default values, one per stack */
 struct ipv6rp
 {
 	int	mflag;
 	int	oflag;
 	int 	maxraint;
 	int	minraint;
 	int	linkmtu;
 	int	reachtime;
 	int	rxmitra;
 	int	ttl;
 	int	routerlt;
 };

 /* actual interface */
 struct ipifc
 {
 	struct ipifc	*next;
 	struct iplifc	*lifc;

 	/* per ip interface */
 	int	index;			/* number of interface in ipifc dir */
 	char	dev[64];
 	uint8_t	sendra6;		/* on == send router adv */
 	uint8_t	recvra6;		/* on == rcv router adv */
 	int	mtu;
 	uint32_t	pktin;
 	uint32_t	pktout;
 	uint32_t	errin;
 	uint32_t	errout;
 	struct ipv6rp	rp;
 };

 #define ISIPV6MCAST(addr)	((addr)[0] == 0xff)
 #define ISIPV6LINKLOCAL(addr) ((addr)[0] == 0xfe && ((addr)[1] & 0xc0) == 0x80)

 /*
  * ipv6 constants
  * `ra' is `router advertisement', `rs' is `router solicitation'.
  * `na' is `neighbour advertisement'.
  */
 enum {
 	IPV6HDR_LEN	= 40,

 	/* neighbour discovery option types */
 	V6nd_srclladdr	= 1,
 	V6nd_targlladdr	= 2,
 	V6nd_pfxinfo	= 3,
 	V6nd_redirhdr	= 4,
 	V6nd_mtu	= 5,
 	/* new since rfc2461; see iana.org/assignments/icmpv6-parameters */
 	V6nd_home	= 8,
 	V6nd_srcaddrs	= 9,		/* rfc3122 */
 	V6nd_ip		= 17,
 	/* /lib/rfc/drafts/draft-jeong-dnsop-ipv6-dns-discovery-12.txt */
 	V6nd_rdns	= 25,
 	/* plan 9 extensions */
 	V6nd_9fs	= 250,
 	V6nd_9auth	= 251,

 	/* Router constants (all times in ms.) */
 	Maxv6initraintvl= 16000,
 	Maxv6initras	= 3,
 	Maxv6finalras	= 3,
 	Minv6interradelay= 3000,
 	Maxv6radelay	= 500,

 	/* Host constants */
 	Maxv6rsdelay	= 1000,
 	V6rsintvl	= 4000,
 	Maxv6rss	= 3,

 	/* Node constants */
 	Maxv6mcastrss	= 3,
 	Maxv6unicastrss	= 3,
 	Maxv6anycastdelay= 1000,
 	Maxv6na		= 3,
 	V6reachabletime	= 30000,
 	V6retranstimer	= 1000,
 	V6initprobedelay= 5000,
 };

 # if 0
 /* in icmp.h? */
 struct ip4hdr
 {
 	uint8_t	vihl;		/* Version and header length */
 	uint8_t	tos;		/* Type of service */
 	uint8_t	length[2];	/* packet length */
 	uint8_t	id[2];		/* ip->identification */
 	uint8_t	frag[2];	/* Fragment information */
 	uint8_t	ttl;      	/* Time to live */
 	uint8_t	proto;		/* Protocol */
 	uint8_t	cksum[2];	/* Header checksum */
 	uint8_t	src[4];		/* IP source */
 	uint8_t	dst[4];		/* IP destination */
 };
 #endif

 /* V6 header on the wire */

 struct ip6hdr {
 	uint8_t	vcf[4];		/* version:4, traffic class:8, flow label:20 */
 	uint8_t	ploadlen[2];	/* payload length: packet length - 40 */
 	uint8_t	proto;		/* next header type */
 	uint8_t	ttl;		/* hop limit */
 	uint8_t	src[IPaddrlen];	/* source address */
 	uint8_t	dst[IPaddrlen];	/* destination address */
 	uint8_t	payload[];
 };

 /*
  *  user-level icmpv6 with control message "headers"
  */

 struct icmp6hdr {
 	uint8_t	_0_[8];
 	uint8_t	laddr[IPaddrlen];	/* local address */
 	uint8_t	raddr[IPaddrlen];	/* remote address */
 };

 /*
  *  user level udp headers with control message "headers"
  */
 enum
 {
 	Udphdrsize=	52,	/* size of a Udphdr */
 };

 struct udphdr
 {
 	uint8_t	raddr[IPaddrlen];	/* V6 remote address */
 	uint8_t	laddr[IPaddrlen];	/* V6 local address */
 	uint8_t	ifcaddr[IPaddrlen];	/* V6 ifc addr msg was received on */
 	uint8_t	rport[2];		/* remote port */
 	uint8_t	lport[2];		/* local port */
 };

 uint8_t *defmask(uint8_t*);
 void maskip(uint8_t*, uint8_t*, uint8_t*);
 //int eipfmt(Fmt*);
 int isv4(uint8_t*);
 int64_t parseip(uint8_t*, char*);
 int64_t parseipmask(uint8_t*, char*);
 char *v4parseip(uint8_t*, char*);
 char *v4parsecidr(uint8_t*, uint8_t*, char*);
 int parseether(uint8_t*, char*);
 int myipaddr(uint8_t*, char*);
 int my_router_addr(uint8_t *addr, char *net);
 int myetheraddr(uint8_t*, char*);
 int equivip4(uint8_t*, uint8_t*);
 int equivip6(uint8_t*, uint8_t*);

 struct ipifc *readipifc(char *net, struct ipifc *to_free, int index);
 struct iplifc *get_first_noloop_iplifc(char *net, struct ipifc **ifc);
 void free_ipifc(struct ipifc *ifc);

 void hnputv(void*, uint64_t);
 void hnputl(void*, unsigned int);
 void hnputs(void*, uint16_t);
 uint64_t nhgetv(void*);
 unsigned int nhgetl(void*);
 uint16_t nhgets(void*);
 uint16_t ptclbsum(uint8_t*, int);
 uint16_t ip_calc_xsum(uint8_t *addr, size_t len);

 int v6tov4(uint8_t*, uint8_t*);
 void v4tov6(uint8_t*, uint8_t*);

 #define ipcmp(x, y) memcmp(x, y, IPaddrlen)
 #define ipmove(x, y) memmove(x, y, IPaddrlen)

 extern uint8_t IPv4bcast[IPaddrlen];
 extern uint8_t IPv4bcastobs[IPaddrlen];
 extern uint8_t IPv4allsys[IPaddrlen];
 extern uint8_t IPv4allrouter[IPaddrlen];
 extern uint8_t IPnoaddr[IPaddrlen];
 extern uint8_t v4prefix[IPaddrlen];
 extern uint8_t IPallbits[IPaddrlen];

 #define CLASS(p) ((*(uint8_t*)(p))>>6)

 int tokenize(char *s, char **args, int maxargs);
 int getfields(char *str, char **args, int max, int mflag, char *unused_set);
 char *netmkaddr(char *linear, char *defnet, char *defsrv, char *buf,
                 size_t buf_sz);
 int dial9(char *dest, char *local, char *dir, int *cfdp, int flags);
 int clone9(char *addr, char *dir, int flags);
 int announce9(char *addr, char *dir, int flags);
 int bypass9(char *addr, char *conv_dir, int flags);
 int listen9(char *dir, char *newdir, int flags);
 int accept9(int ctl, char *dir);
 int reject9(int ctl, char *dir, char *cause);
 int open_data_fd9(char *conv_dir, int flags);
 bool get_port9(char *conv_dir, char *which, uint16_t *port);
 int gettokens(char *s, char **args, int maxargs, char *sep);

 __END_DECLS
	/*
	* This file is part of the UCB release of Plan 9. It is subject to the license
	* terms in the LICENSE file found in the top-level directory of this
	* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
	* part of the UCB release of Plan 9, including this file, may be copied,
	* modified, propagated, or distributed except according to the terms contained
	* in the LICENSE file.
	*/
	#pragma once

	#include <parlib/common.h>

	__BEGIN_DECLS

	enum
	{
	ETH_HDR_LEN = 14,
	ETH_OFF_DST = 0,
	ETH_OFF_SRC = 6,
	ETH_OFF_ETYPE = 12,

	ETH_ADDR_LEN = 6,
	ETH_TYPE_IPV4 = 0x0800,
	ETH_TYPE_ARP = 0x0806,
	ETH_TYPE_IPV6 = 0x86dd,
	ETH_HTYPE_ETH = 1,

	IPV4_HDR_LEN = 20,
	IPV4_OFF_LEN = 2,
	IPV4_OFF_ID = 4,
	IPV4_OFF_TTL = 8,
	IPV4_OFF_PROTO = 9,
	IPV4_OFF_XSUM = 10,
	IPV4_OFF_SRC = 12,
	IPV4_OFF_DST = 16,

	IPV4_ADDR_LEN = 4,
	IP_ICMPPROTO = 1,
	IP_IGMPPROTO = 2,
	IP_TCPPROTO = 6,
	IP_UDPPROTO = 17,
	IP_ILPROTO = 40,

	UDP_HDR_LEN = 8,
	UDP_OFF_SRC_PORT = 0,
	UDP_OFF_DST_PORT = 2,
	UDP_OFF_LEN = 4,
	UDP_OFF_XSUM = 6,

	TCP_HDR_LEN = 20,
	TCP_OFF_SRC_PORT = 0,
	TCP_OFF_DST_PORT = 2,
	TCP_OFF_SEQ = 4,
	TCP_OFF_ACK = 8,
	TCP_OFF_DATA = 12,
	TCP_OFF_FL = 12,
	TCP_OFF_WIN = 14,
	TCP_OFF_XSUM = 16,

	ARP_PKT_LEN = 28,
	ARP_OFF_HTYPE = 0,
	ARP_OFF_PTYPE = 2,
	ARP_OFF_HLEN = 4,
	ARP_OFF_PLEN = 5,
	ARP_OFF_OP = 6,
	ARP_OFF_SHA = 8,
	ARP_OFF_SPA = 14,
	ARP_OFF_THA = 18,
	ARP_OFF_TPA = 24,

	ARP_OP_REQ = 1,
	ARP_OP_RSP = 2,

	IPaddrlen= 16,
	IPv4addrlen= 4,
	IPv4off= 12,
	IPllen= 4,
	IPV4HDR_LEN= 20,

	/* vihl & vcf[0] values */
	IP_VER4= 0x40,
	IP_VER6= 0x60,
	NETPATHLEN= 40,
	};

	/*
	* for reading /net/ipifc
	*/

	/* local address */
	struct iplifc
	{
	struct iplifc *next;

	/* per address on the ip interface */
	uint8_t ip[IPaddrlen];
	uint8_t mask[IPaddrlen];
	uint8_t net[IPaddrlen]; /* ip & mask */
	uint32_t preflt; /* preferred lifetime */
	uint32_t validlt; /* valid lifetime */
	};

	/* default values, one per stack */
	struct ipv6rp
	{
	int mflag;
	int oflag;
	int maxraint;
	int minraint;
	int linkmtu;
	int reachtime;
	int rxmitra;
	int ttl;
	int routerlt;
	};

	/* actual interface */
	struct ipifc
	{
	struct ipifc *next;
	struct iplifc *lifc;

	/* per ip interface */
	int index; /* number of interface in ipifc dir */
	char dev[64];
	uint8_t sendra6; /* on == send router adv */
	uint8_t recvra6; /* on == rcv router adv */
	int mtu;
	uint32_t pktin;
	uint32_t pktout;
	uint32_t errin;
	uint32_t errout;
	struct ipv6rp rp;
	};

	#define ISIPV6MCAST(addr) ((addr)[0] == 0xff)
	#define ISIPV6LINKLOCAL(addr) ((addr)[0] == 0xfe && ((addr)[1] & 0xc0) == 0x80)

	/*
	* ipv6 constants
	* `ra' is `router advertisement', `rs' is `router solicitation'.
	* `na' is `neighbour advertisement'.
	*/
	enum {
	IPV6HDR_LEN = 40,

	/* neighbour discovery option types */
	V6nd_srclladdr = 1,
	V6nd_targlladdr = 2,
	V6nd_pfxinfo = 3,
	V6nd_redirhdr = 4,
	V6nd_mtu = 5,
	/* new since rfc2461; see iana.org/assignments/icmpv6-parameters */
	V6nd_home = 8,
	V6nd_srcaddrs = 9, /* rfc3122 */
	V6nd_ip = 17,
	/* /lib/rfc/drafts/draft-jeong-dnsop-ipv6-dns-discovery-12.txt */
	V6nd_rdns = 25,
	/* plan 9 extensions */
	V6nd_9fs = 250,
	V6nd_9auth = 251,

	/* Router constants (all times in ms.) */
	Maxv6initraintvl= 16000,
	Maxv6initras = 3,
	Maxv6finalras = 3,
	Minv6interradelay= 3000,
	Maxv6radelay = 500,

	/* Host constants */
	Maxv6rsdelay = 1000,
	V6rsintvl = 4000,
	Maxv6rss = 3,

	/* Node constants */
	Maxv6mcastrss = 3,
	Maxv6unicastrss = 3,
	Maxv6anycastdelay= 1000,
	Maxv6na = 3,
	V6reachabletime = 30000,
	V6retranstimer = 1000,
	V6initprobedelay= 5000,
	};

	# if 0
	/* in icmp.h? */
	struct ip4hdr
	{
	uint8_t vihl; /* Version and header length */
	uint8_t tos; /* Type of service */
	uint8_t length[2]; /* packet length */
	uint8_t id[2]; /* ip->identification */
	uint8_t frag[2]; /* Fragment information */
	uint8_t ttl; /* Time to live */
	uint8_t proto; /* Protocol */
	uint8_t cksum[2]; /* Header checksum */
	uint8_t src[4]; /* IP source */
	uint8_t dst[4]; /* IP destination */
	};
	#endif

	/* V6 header on the wire */

	struct ip6hdr {
	uint8_t vcf[4]; /* version:4, traffic class:8, flow label:20 */
	uint8_t ploadlen[2]; /* payload length: packet length - 40 */
	uint8_t proto; /* next header type */
	uint8_t ttl; /* hop limit */
	uint8_t src[IPaddrlen]; /* source address */
	uint8_t dst[IPaddrlen]; /* destination address */
	uint8_t payload[];
	};

	/*
	* user-level icmpv6 with control message "headers"
	*/

	struct icmp6hdr {
	uint8_t _0_[8];
	uint8_t laddr[IPaddrlen]; /* local address */
	uint8_t raddr[IPaddrlen]; /* remote address */
	};

	/*
	* user level udp headers with control message "headers"
	*/
	enum
	{
	Udphdrsize= 52, /* size of a Udphdr */
	};

	struct udphdr
	{
	uint8_t raddr[IPaddrlen]; /* V6 remote address */
	uint8_t laddr[IPaddrlen]; /* V6 local address */
	uint8_t ifcaddr[IPaddrlen]; /* V6 ifc addr msg was received on */
	uint8_t rport[2]; /* remote port */
	uint8_t lport[2]; /* local port */
	};

	uint8_t defmask(uint8_t);
	void maskip(uint8_t, uint8_t, uint8_t*);
	//int eipfmt(Fmt*);
	int isv4(uint8_t*);
	int64_t parseip(uint8_t, char);
	int64_t parseipmask(uint8_t, char);
	char v4parseip(uint8_t, char*);
	char v4parsecidr(uint8_t, uint8_t, char);
	int parseether(uint8_t, char);
	int myipaddr(uint8_t, char);
	int my_router_addr(uint8_t addr, char net);
	int myetheraddr(uint8_t, char);
	int equivip4(uint8_t, uint8_t);
	int equivip6(uint8_t, uint8_t);

	struct ipifc readipifc(char net, struct ipifc *to_free, int index);
	struct iplifc get_first_noloop_iplifc(char net, struct ipifc **ifc);
	void free_ipifc(struct ipifc *ifc);

	void hnputv(void*, uint64_t);
	void hnputl(void*, unsigned int);
	void hnputs(void*, uint16_t);
	uint64_t nhgetv(void*);
	unsigned int nhgetl(void*);
	uint16_t nhgets(void*);
	uint16_t ptclbsum(uint8_t*, int);
	uint16_t ip_calc_xsum(uint8_t *addr, size_t len);

	int v6tov4(uint8_t, uint8_t);
	void v4tov6(uint8_t, uint8_t);

	#define ipcmp(x, y) memcmp(x, y, IPaddrlen)
	#define ipmove(x, y) memmove(x, y, IPaddrlen)

	extern uint8_t IPv4bcast[IPaddrlen];
	extern uint8_t IPv4bcastobs[IPaddrlen];
	extern uint8_t IPv4allsys[IPaddrlen];
	extern uint8_t IPv4allrouter[IPaddrlen];
	extern uint8_t IPnoaddr[IPaddrlen];
	extern uint8_t v4prefix[IPaddrlen];
	extern uint8_t IPallbits[IPaddrlen];

	#define CLASS(p) (((uint8_t)(p))>>6)

	int tokenize(char s, char *args, int maxargs);
	int getfields(char str, char args, int max, int mflag, char unused_set);
	char netmkaddr(char linear, char defnet, char defsrv, char *buf,
	size_t buf_sz);
	int dial9(char dest, char local, char dir, int cfdp, int flags);
	int clone9(char addr, char dir, int flags);
	int announce9(char addr, char dir, int flags);
	int bypass9(char addr, char conv_dir, int flags);
	int listen9(char dir, char newdir, int flags);
	int accept9(int ctl, char *dir);
	int reject9(int ctl, char dir, char cause);
	int open_data_fd9(char *conv_dir, int flags);
	bool get_port9(char conv_dir, char which, uint16_t *port);
	int gettokens(char s, char args, int maxargs, char sep);

	__END_DECLS