1 87a52e04 2005-12-26 devnull #include <u.h>
  2 87a52e04 2005-12-26 devnull #include <libc.h>
  3 87a52e04 2005-12-26 devnull #include <ip.h>
  4 87a52e04 2005-12-26 devnull #include "dat.h"
  5 87a52e04 2005-12-26 devnull #include "protos.h"
  6 87a52e04 2005-12-26 devnull 
  7 87a52e04 2005-12-26 devnull enum
  8 87a52e04 2005-12-26 devnull {
  9 87a52e04 2005-12-26 devnull 	OfferTimeout=	60,		/* when an offer times out */
 10 87a52e04 2005-12-26 devnull 	MaxLease=	60*60,		/* longest lease for dynamic binding */
 11 87a52e04 2005-12-26 devnull 	MinLease=	15*60,		/* shortest lease for dynamic binding */
 12 87a52e04 2005-12-26 devnull 	StaticLease=	30*60,		/* lease for static binding */
 13 87a52e04 2005-12-26 devnull 
 14 87a52e04 2005-12-26 devnull 	IPUDPHDRSIZE=	28,		/* size of an IP plus UDP header */
 15 87a52e04 2005-12-26 devnull 	MINSUPPORTED=	576,		/* biggest IP message the client must support */
 16 87a52e04 2005-12-26 devnull 
 17 87a52e04 2005-12-26 devnull 	/* lengths of some bootp fields */
 18 87a52e04 2005-12-26 devnull 	Maxhwlen=	16,
 19 87a52e04 2005-12-26 devnull 	Maxfilelen=	128,
 20 87a52e04 2005-12-26 devnull 	Maxoptlen=	312-4,
 21 87a52e04 2005-12-26 devnull 
 22 87a52e04 2005-12-26 devnull 	/* bootp types */
 23 87a52e04 2005-12-26 devnull 	Bootrequest=	1,
 24 87a52e04 2005-12-26 devnull 	Bootreply= 	2,
 25 87a52e04 2005-12-26 devnull 
 26 87a52e04 2005-12-26 devnull 	/* bootp flags */
 27 87a52e04 2005-12-26 devnull 	Fbroadcast=	1<<15,
 28 87a52e04 2005-12-26 devnull };
 29 87a52e04 2005-12-26 devnull 
 30 87a52e04 2005-12-26 devnull typedef struct Hdr	Hdr;
 31 87a52e04 2005-12-26 devnull struct Hdr
 32 87a52e04 2005-12-26 devnull {
 33 87a52e04 2005-12-26 devnull 	uchar	op;			/* opcode */
 34 87a52e04 2005-12-26 devnull 	uchar	htype;			/* hardware type */
 35 87a52e04 2005-12-26 devnull 	uchar	hlen;			/* hardware address len */
 36 87a52e04 2005-12-26 devnull 	uchar	hops;			/* hops */
 37 87a52e04 2005-12-26 devnull 	uchar	xid[4];			/* a random number */
 38 87a52e04 2005-12-26 devnull 	uchar	secs[2];		/* elapsed since client started booting */
 39 87a52e04 2005-12-26 devnull 	uchar	flags[2];
 40 87a52e04 2005-12-26 devnull 	uchar	ciaddr[IPv4addrlen];	/* client IP address (client tells server) */
 41 87a52e04 2005-12-26 devnull 	uchar	yiaddr[IPv4addrlen];	/* client IP address (server tells client) */
 42 87a52e04 2005-12-26 devnull 	uchar	siaddr[IPv4addrlen];	/* server IP address */
 43 87a52e04 2005-12-26 devnull 	uchar	giaddr[IPv4addrlen];	/* gateway IP address */
 44 87a52e04 2005-12-26 devnull 	uchar	chaddr[Maxhwlen];	/* client hardware address */
 45 87a52e04 2005-12-26 devnull 	char	sname[64];		/* server host name (optional) */
 46 87a52e04 2005-12-26 devnull 	char	file[Maxfilelen];	/* boot file name */
 47 87a52e04 2005-12-26 devnull 	uchar	optmagic[4];
 48 87a52e04 2005-12-26 devnull 	uchar	optdata[Maxoptlen];
 49 87a52e04 2005-12-26 devnull };
 50 87a52e04 2005-12-26 devnull 
 51 87a52e04 2005-12-26 devnull enum
 52 87a52e04 2005-12-26 devnull {
 53 87a52e04 2005-12-26 devnull 	Oca,
 54 87a52e04 2005-12-26 devnull 	Osa,
 55 87a52e04 2005-12-26 devnull 	Ot,
 56 87a52e04 2005-12-26 devnull };
 57 87a52e04 2005-12-26 devnull 
 58 87a52e04 2005-12-26 devnull static Field p_fields[] = 
 59 87a52e04 2005-12-26 devnull {
 60 87a52e04 2005-12-26 devnull 	{"ca",		Fv4ip,	Oca,	"client IP addr",	} ,
 61 87a52e04 2005-12-26 devnull 	{"sa",		Fv4ip,	Osa,	"server IP addr",	} ,
 62 87a52e04 2005-12-26 devnull 	{0}
 63 87a52e04 2005-12-26 devnull };
 64 87a52e04 2005-12-26 devnull 
 65 87a52e04 2005-12-26 devnull #define plan9opt ((ulong)(('p'<<24) | ('9'<<16) | (' '<<8) | ' '))
 66 87a52e04 2005-12-26 devnull #define genericopt (0x63825363UL)
 67 87a52e04 2005-12-26 devnull 
 68 87a52e04 2005-12-26 devnull static Mux p_mux[] =
 69 87a52e04 2005-12-26 devnull {
 70 87a52e04 2005-12-26 devnull 	{"dhcp", 	genericopt,},
 71 87a52e04 2005-12-26 devnull 	{"plan9bootp",	plan9opt,},
 72 87a52e04 2005-12-26 devnull 	{"dump",	0,},
 73 87a52e04 2005-12-26 devnull 	{0}
 74 87a52e04 2005-12-26 devnull };
 75 87a52e04 2005-12-26 devnull 
 76 87a52e04 2005-12-26 devnull static void
 77 87a52e04 2005-12-26 devnull p_compile(Filter *f)
 78 87a52e04 2005-12-26 devnull {
 79 87a52e04 2005-12-26 devnull 	Mux *m;
 80 87a52e04 2005-12-26 devnull 
 81 87a52e04 2005-12-26 devnull 	if(f->op == '='){
 82 87a52e04 2005-12-26 devnull 		compile_cmp(arp.name, f, p_fields);
 83 87a52e04 2005-12-26 devnull 		return;
 84 87a52e04 2005-12-26 devnull 	}
 85 87a52e04 2005-12-26 devnull 	for(m = p_mux; m->name != nil; m++)
 86 87a52e04 2005-12-26 devnull 		if(strcmp(f->s, m->name) == 0){
 87 87a52e04 2005-12-26 devnull 			f->pr = m->pr;
 88 87a52e04 2005-12-26 devnull 			f->ulv = m->val;
 89 87a52e04 2005-12-26 devnull 			f->subop = Ot;
 90 87a52e04 2005-12-26 devnull 			return;
 91 87a52e04 2005-12-26 devnull 		}
 92 87a52e04 2005-12-26 devnull 	sysfatal("unknown bootp field: %s", f->s);
 93 87a52e04 2005-12-26 devnull }
 94 87a52e04 2005-12-26 devnull 
 95 87a52e04 2005-12-26 devnull static int
 96 87a52e04 2005-12-26 devnull p_filter(Filter *f, Msg *m)
 97 87a52e04 2005-12-26 devnull {
 98 87a52e04 2005-12-26 devnull 	Hdr *h;
 99 87a52e04 2005-12-26 devnull 
100 87a52e04 2005-12-26 devnull 	h = (Hdr*)m->ps;
101 87a52e04 2005-12-26 devnull 
102 87a52e04 2005-12-26 devnull 	if(m->pe < (uchar*)h->sname)
103 87a52e04 2005-12-26 devnull 		return 0;
104 87a52e04 2005-12-26 devnull 	m->ps = h->optdata;
105 87a52e04 2005-12-26 devnull 
106 87a52e04 2005-12-26 devnull 	switch(f->subop){
107 87a52e04 2005-12-26 devnull 	case Oca:
108 87a52e04 2005-12-26 devnull 		return NetL(h->ciaddr) == f->ulv || NetL(h->yiaddr) == f->ulv;
109 87a52e04 2005-12-26 devnull 	case Osa:
110 87a52e04 2005-12-26 devnull 		return NetL(h->siaddr) == f->ulv;
111 87a52e04 2005-12-26 devnull 	case Ot:
112 87a52e04 2005-12-26 devnull 		return NetL(h->optmagic) == f->ulv;
113 87a52e04 2005-12-26 devnull 	}
114 87a52e04 2005-12-26 devnull 	return 0;
115 87a52e04 2005-12-26 devnull }
116 87a52e04 2005-12-26 devnull 
117 87a52e04 2005-12-26 devnull static char*
118 87a52e04 2005-12-26 devnull op(int i)
119 87a52e04 2005-12-26 devnull {
120 87a52e04 2005-12-26 devnull 	static char x[20];
121 87a52e04 2005-12-26 devnull 
122 87a52e04 2005-12-26 devnull 	switch(i){
123 87a52e04 2005-12-26 devnull 	case Bootrequest:
124 87a52e04 2005-12-26 devnull 		return "Req";
125 87a52e04 2005-12-26 devnull 	case Bootreply:
126 87a52e04 2005-12-26 devnull 		return "Rep";
127 87a52e04 2005-12-26 devnull 	default:
128 87a52e04 2005-12-26 devnull 		sprint(x, "%d", i);
129 87a52e04 2005-12-26 devnull 		return x;
130 87a52e04 2005-12-26 devnull 	}
131 87a52e04 2005-12-26 devnull }
132 87a52e04 2005-12-26 devnull 
133 87a52e04 2005-12-26 devnull 
134 87a52e04 2005-12-26 devnull static int
135 87a52e04 2005-12-26 devnull p_seprint(Msg *m)
136 87a52e04 2005-12-26 devnull {
137 87a52e04 2005-12-26 devnull 	Hdr *h;
138 87a52e04 2005-12-26 devnull 	ulong x;
139 87a52e04 2005-12-26 devnull 
140 87a52e04 2005-12-26 devnull 	h = (Hdr*)m->ps;
141 87a52e04 2005-12-26 devnull 
142 87a52e04 2005-12-26 devnull 	if(m->pe < (uchar*)h->sname)
143 87a52e04 2005-12-26 devnull 		return -1;
144 87a52e04 2005-12-26 devnull 
145 87a52e04 2005-12-26 devnull 	/* point past data */
146 87a52e04 2005-12-26 devnull 	m->ps = h->optdata;
147 87a52e04 2005-12-26 devnull 
148 87a52e04 2005-12-26 devnull 	/* next protocol */
149 87a52e04 2005-12-26 devnull 	m->pr = nil;
150 87a52e04 2005-12-26 devnull 	if(m->pe >= (uchar*)h->optdata){
151 87a52e04 2005-12-26 devnull 		x = NetL(h->optmagic);
152 87a52e04 2005-12-26 devnull 		demux(p_mux, x, x, m, &dump);
153 87a52e04 2005-12-26 devnull 	}
154 87a52e04 2005-12-26 devnull 
155 87a52e04 2005-12-26 devnull 	m->p = seprint(m->p, m->e, "t=%s ht=%d hl=%d hp=%d xid=%ux sec=%d fl=%4.4ux ca=%V ya=%V sa=%V ga=%V cha=%E magic=%lux",
156 87a52e04 2005-12-26 devnull 		op(h->op), h->htype, h->hlen, h->hops,
157 87a52e04 2005-12-26 devnull 		NetL(h->xid), NetS(h->secs), NetS(h->flags),
158 87a52e04 2005-12-26 devnull 		h->ciaddr, h->yiaddr, h->siaddr, h->giaddr, h->chaddr,
159 87a52e04 2005-12-26 devnull 		(ulong)NetL(h->optmagic));
160 87a52e04 2005-12-26 devnull 	if(m->pe > (uchar*)h->sname && *h->sname)
161 87a52e04 2005-12-26 devnull 		m->p = seprint(m->p, m->e, " snam=%s", h->sname);
162 87a52e04 2005-12-26 devnull 	if(m->pe > (uchar*)h->file && *h->file)
163 87a52e04 2005-12-26 devnull 		m->p = seprint(m->p, m->e, " file=%s", h->file);
164 87a52e04 2005-12-26 devnull 	return 0;
165 87a52e04 2005-12-26 devnull }
166 87a52e04 2005-12-26 devnull 
167 87a52e04 2005-12-26 devnull Proto bootp =
168 87a52e04 2005-12-26 devnull {
169 87a52e04 2005-12-26 devnull 	"bootp",
170 87a52e04 2005-12-26 devnull 	p_compile,
171 87a52e04 2005-12-26 devnull 	p_filter,
172 87a52e04 2005-12-26 devnull 	p_seprint,
173 87a52e04 2005-12-26 devnull 	p_mux,
174 a38a1836 2006-02-14 devnull 	"%#.8lux",
175 87a52e04 2005-12-26 devnull 	p_fields,
176 87a52e04 2005-12-26 devnull 	defaultframer,
177 87a52e04 2005-12-26 devnull };