#include <u.h>#include <libc.h>#include <ip.h>#include <bio.h>#include <ndb.h>#include "dhcp.h" int	noconfig;int	debug;int	dodhcp;int	nip;int	myifc = -1;int	plan9 = 1;int	beprimary = -1;int	nodhcpwatch;int	sendhostname;int	dondbconfig = 0;int	Oflag; char	*ndboptions; Ipifc	*ifc; // possible verbsenum{	Vadd,	Vremove,	Vunbind,	Vether,	Vloopback,}; struct {	// locally generated	char	*type;	char	*dev;	char	mpoint[32];	int	cfd;			// ifc control channel	char	*cputype;	uchar	hwa[32];		// hardware address	int	hwatype;	int	hwalen;	uchar	cid[32];	int	cidlen;	char	*baud; 	// learned info	uchar	gaddr[IPaddrlen];	uchar	laddr[IPaddrlen];	uchar	mask[IPaddrlen];	uchar	raddr[IPaddrlen];	uchar	dns[2*IPaddrlen];	uchar	fs[2*IPaddrlen];	uchar	auth[2*IPaddrlen];	uchar	ntp[IPaddrlen];	int	mtu; 	// dhcp specific	int	state;	int	fd;	ulong	xid;	ulong	starttime;	char	sname[64];	char	hostname[32];	char	domainname[64];	uchar	server[IPaddrlen];	/* server IP address */	ulong	offered;		/* offered lease time */	ulong	lease;			/* lease time */	ulong	resend;			/* number of resends for current state */	ulong	timeout;		/* time to timeout - seconds */} conf; enum{	Taddr,	Taddrs,	Tstr,	Tbyte,	Tulong,	Tvec,}; typedef struct Option Option;struct Option{	char	*name;	int	type;}; // I was too lazy to look up the types for each of these// options.  If someone feels like it, please mail me a// corrected array -- presottoOption option[256] ={[OBmask]		{ "ipmask",		Taddr },[OBtimeoff]		{ "timeoff",		Tulong },[OBrouter]		{ "ipgw",		Taddrs },[OBtimeserver]		{ "time",		Taddrs },[OBnameserver]		{ "name",		Taddrs },[OBdnserver]		{ "dns",		Taddrs },[OBlogserver]		{ "log",		Taddrs },[OBcookieserver]	{ "cookie",		Taddrs },[OBlprserver]		{ "lpr",		Taddrs },[OBimpressserver]	{ "impress",		Taddrs },[OBrlserver]		{ "rl",			Taddrs },[OBhostname]		{ "sys",		Tstr },[OBbflen]		{ "bflen",		Tulong },[OBdumpfile]		{ "dumpfile",		Tstr },[OBdomainname]		{ "dom",		Tstr },[OBswapserver]		{ "swap",		Taddrs },[OBrootpath]		{ "rootpath",		Tstr },[OBextpath]		{ "extpath",		Tstr },[OBipforward]		{ "ipforward",		Taddrs },[OBnonlocal]		{ "nonlocal",		Taddrs },[OBpolicyfilter]	{ "policyfilter",	Taddrs },[OBmaxdatagram]		{ "maxdatagram",	Tulong },[OBttl]			{ "ttl",		Tulong },[OBpathtimeout]		{ "pathtimeout",	Taddrs },[OBpathplateau]		{ "pathplateau",	Taddrs },[OBmtu]			{ "mtu",		Tulong },[OBsubnetslocal]	{ "subnetslocal",	Taddrs },[OBbaddr]		{ "baddr",		Taddrs },[OBdiscovermask]	{ "discovermask",	Taddrs },[OBsupplymask]		{ "supplymask",		Taddrs },[OBdiscoverrouter]	{ "discoverrouter",	Taddrs },[OBrsserver]		{ "rs",			Taddrs },[OBstaticroutes]	{ "staticroutes",	Taddrs },[OBtrailerencap]	{ "trailerencap",	Taddrs },[OBarptimeout]		{ "arptimeout",		Tulong },[OBetherencap]		{ "etherencap",		Taddrs },[OBtcpttl]		{ "tcpttl",		Tulong },[OBtcpka]		{ "tcpka",		Tulong },[OBtcpkag]		{ "tcpkag",		Tulong },[OBnisdomain]		{ "nisdomain",		Tstr },[OBniserver]		{ "ni",			Taddrs },[OBntpserver]		{ "ntp",		Taddrs },[OBnetbiosns]		{ "netbiosns",		Taddrs },[OBnetbiosdds]		{ "netbiosdds",		Taddrs },[OBnetbiostype]		{ "netbiostype",	Taddrs },[OBnetbiosscope]	{ "netbiosscope",	Taddrs },[OBxfontserver]		{ "xfont",		Taddrs },[OBxdispmanager]	{ "xdispmanager",	Taddrs },[OBnisplusdomain]	{ "nisplusdomain",	Tstr },[OBnisplusserver]	{ "nisplus",		Taddrs },[OBhomeagent]		{ "homeagent",		Taddrs },[OBsmtpserver]		{ "smtp",		Taddrs },[OBpop3server]		{ "pop3",		Taddrs },[OBnntpserver]		{ "nntp",		Taddrs },[OBwwwserver]		{ "www",		Taddrs },[OBfingerserver]	{ "finger",		Taddrs },[OBircserver]		{ "irc",		Taddrs },[OBstserver]		{ "st",			Taddrs },[OBstdaserver]		{ "stdar",		Taddrs }, [ODipaddr]		{ "ipaddr",		Taddr },[ODlease]		{ "lease",		Tulong },[ODoverload]		{ "overload",		Taddr },[ODtype]		{ "type",		Tbyte },[ODserverid]		{ "serverid",		Taddr },[ODparams]		{ "params",		Tvec },[ODmessage]		{ "message",		Tstr },[ODmaxmsg]		{ "maxmsg",		Tulong },[ODrenewaltime]		{ "renewaltime",	Tulong },[ODrebindingtime]	{ "rebindingtime",	Tulong },[ODvendorclass]		{ "vendorclass",	Tvec },[ODclientid]		{ "clientid",		Tvec },[ODtftpserver]		{ "tftp",		Taddr },[ODbootfile]		{ "bootfile",		Tstr },}; uchar defrequested[] = {	OBmask, OBrouter, OBdnserver, OBhostname, OBdomainname, OBntpserver,}; uchar requested[256];int nrequested; void	adddefroute(char*, uchar*);int	addoption(char*);void	binddevice(void);void	bootprequest(void);void	controldevice(void);void	dhcpquery(int, int);void	dhcprecv(void);void	dhcpsend(int);int	dhcptimer(void);void	dhcpwatch(int);void	doadd(int);void	doremove(void);void	dounbind(void);int	getndb(void);void	getoptions(uchar*);int	ipconfig(void);void	lookforip(char*);void	mkclientid(void);void	ndbconfig(void);int	nipifcs(char*);int	openlisten(void);uchar*	optadd(uchar*, int, void*, int);uchar*	optaddaddr(uchar*, int, uchar*);uchar*	optaddbyte(uchar*, int, int);uchar*	optaddstr(uchar*, int, char*);uchar*	optaddulong(uchar*, int, ulong);uchar*	optaddvec(uchar*, int, uchar*, int);uchar*	optget(uchar*, int, int*);int	optgetaddr(uchar*, int, uchar*);int	optgetaddrs(uchar*, int, uchar*, int);int	optgetbyte(uchar*, int);int	optgetstr(uchar*, int, char*, int);ulong	optgetulong(uchar*, int);int	optgetvec(uchar*, int, uchar*, int);char*	optgetx(uchar*, uchar);Bootp*	parsebootp(uchar*, int);int	parseoptions(uchar *p, int n);int	parseverb(char*);void	putndb(void);void	tweakservers(void);void	usage(void);int	validip(uchar*);void	writendb(char*, int, int); char optmagic[4] = { 0x63, 0x82, 0x53, 0x63 }; #define DEBUG if(debug)print typedef struct Ctl Ctl;struct Ctl{	Ctl	*next;	char	*ctl;};Ctl *firstctl, **ctll; voidusage(void){	fprint(2, "usage: %s [-ndDrGX] [-x netmtpt] [-m mtu] [-b baud] [-g gateway] [-h hostname] [-c control-string]* type device [verb] [localaddr [mask [remoteaddr [fsaddr [authaddr]]]]]\n", argv0);	exits("usage");} voidmain(int argc, char **argv){	char *p;	int retry, verb, action;	Ctl *cp; 	srand(truerand());	fmtinstall('E', eipfmt);	fmtinstall('I', eipfmt);	fmtinstall('M', eipfmt);	fmtinstall('V', eipfmt); 	setnetmtpt(conf.mpoint, sizeof(conf.mpoint), nil);	conf.cputype = getenv("cputype");	if(conf.cputype == nil)		conf.cputype = "386"; 	retry = 0;	ctll = &firstctl; 	// init set of requested parameters with the default	nrequested = sizeof(defrequested);	memcpy(requested, defrequested, nrequested); 	ARGBEGIN {	case 'D':		debug = 1;		break;	case 'G':		plan9 = 0;		break;	case 'N':		dondbconfig = 1;		break;	case 'O':		Oflag = 1;		break;	case 'p':		beprimary = 1;		break;	case 'P':		beprimary = 0;	case 'b':		p = ARGF();		if(p == nil)			usage();		conf.baud = p;		break;	case 'c':		p = ARGF();		if(p == nil)			usage();		cp = malloc(sizeof(*cp));		if(cp == nil)			sysfatal("%r");		*ctll = cp;		ctll = &cp->next;		cp->next = nil;		cp->ctl = p;		break;	case 'd':		dodhcp = 1;		break;	case 'g':		p = ARGF();		if(p == nil)			usage();		parseip(conf.gaddr, p);		break;	case 'h':		p = ARGF();		if(p == nil)			usage();		snprint(conf.hostname, sizeof(conf.hostname), "%s", p);		sendhostname = 1;		break;	case 'n':		noconfig = 1;		break;	case 'm':		p = ARGF();		if(p == nil)			usage();		conf.mtu = atoi(p);		break;	case 'r':		retry = 1;		break;	case 'x':		p = ARGF();		if(p == nil)			usage();		setnetmtpt(conf.mpoint, sizeof(conf.mpoint), p);		break;	case 'X':		nodhcpwatch = 1;		break;	case 'o':		if(addoption(ARGF()) < 0)			usage();		break;	} ARGEND; 	// default to any host name we already have	if(*conf.hostname == 0){		p = getenv("sysname");		if(p == nil || *p == 0)			p = sysname();		if(p != nil)			strncpy(conf.hostname, p, sizeof(conf.hostname)-1);	}		 	// default	conf.type = "ether";	conf.dev = "/net/ether0";	action = Vadd; 	// get verb, default is "add"	while(argc > 0){		verb = parseverb(argv[0]);		switch(verb){		case Vadd:		case Vremove:		case Vunbind:			action = verb;			break;		case Vether:		case Vloopback:			conf.type = argv[0];			if(argc > 1){				conf.dev = argv[1];				argc--, argv++;			}			break;		}		if(verb < 0)			break;		argc--, argv++;	} 	// get addresses	switch(argc){	case 5:		parseip(conf.auth, argv[4]);		/* fall through */	case 4:		parseip(conf.fs, argv[3]);		/* fall through */	case 3:		parseip(conf.raddr, argv[2]);		/* fall through */	case 2:		if(strcmp(argv[1], "0") != 0)			parseipmask(conf.mask, argv[1]);		/* fall through */	case 1:		parseip(conf.laddr, argv[0]);		break;	} 	switch(action){	case Vadd:		doadd(retry);		break;	case Vremove:		doremove();		break;	case Vunbind:		dounbind();		break;	} 	exits(0);} inthavendb(char *net){	Dir *d;	char buf[128]; 	snprint(buf, sizeof buf, "%s/ndb", net);	if((d = dirstat("/net/ndb")) == nil)		return 0;	if(d->length == 0){		free(d);		return 0;	}	free(d);	return 1;} voiddoadd(int retry){	int tries; 	// get number of preexisting interfaces	nip = nipifcs(conf.mpoint);	if(beprimary == -1 && (nip == 0 || !havendb(conf.mpoint)))		beprimary = 1; 	// get ipifc into name space and condition device for ip	if(!noconfig){		lookforip(conf.mpoint);		controldevice();		binddevice();	} 	if(!validip(conf.laddr)){		if(dondbconfig)			ndbconfig();		else			dodhcp = 1;	} 	// run dhcp if we need something	if(dodhcp){		mkclientid();		for(tries = 0; tries < 2; tries++){			dhcpquery(!noconfig, Sselecting);			if(conf.state == Sbound)				break;			sleep(1000);		}	} 	if(!validip(conf.laddr)){		if(retry && dodhcp && !noconfig){			fprint(2, "%s: couldn't determine ip address, retrying\n", argv0);			dhcpwatch(1);			return;		} else {			fprint(2, "%s: no success with DHCP\n", argv0);			exits("failed");		}	} 	if(!noconfig){		if(ipconfig() < 0)			sysfatal("can't start ip");		if(dodhcp && conf.lease != Lforever)			dhcpwatch(0);	} 	// leave everything we've learned somewhere other procs can find it	if(beprimary == 1){		putndb();		tweakservers();	}} voiddoremove(void){	char file[128];	int cfd;	Ipifc *nifc;

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