1 87a52e04 2005-12-26 devnull #include <u.h>
2 87a52e04 2005-12-26 devnull #include <sys/socket.h>
3 87a52e04 2005-12-26 devnull #include <net/if_arp.h>
4 87a52e04 2005-12-26 devnull #include <netinet/ip.h>
5 87a52e04 2005-12-26 devnull #include <sys/ioctl.h>
6 87a52e04 2005-12-26 devnull #include <libc.h>
7 87a52e04 2005-12-26 devnull #include <ip.h>
8 87a52e04 2005-12-26 devnull #include <bio.h>
9 87a52e04 2005-12-26 devnull #include <ndb.h>
10 87a52e04 2005-12-26 devnull #include "dat.h"
12 87a52e04 2005-12-26 devnull int bwfd;
16 87a52e04 2005-12-26 devnull // ala rfc2131
19 87a52e04 2005-12-26 devnull typedef struct Req Req;
20 87a52e04 2005-12-26 devnull struct Req
22 87a52e04 2005-12-26 devnull int fd; /* for reply */
23 87a52e04 2005-12-26 devnull Bootp *bp;
24 87a52e04 2005-12-26 devnull Udphdr uh;
25 87a52e04 2005-12-26 devnull Udphdr *up;
26 87a52e04 2005-12-26 devnull uchar *e; /* end of received message */
27 87a52e04 2005-12-26 devnull uchar *p; /* options pointer */
28 87a52e04 2005-12-26 devnull uchar *max; /* max end of reply */
30 87a52e04 2005-12-26 devnull /* expanded to v6 */
31 87a52e04 2005-12-26 devnull uchar ciaddr[IPaddrlen];
32 87a52e04 2005-12-26 devnull uchar giaddr[IPaddrlen];
34 87a52e04 2005-12-26 devnull /* parsed options */
35 87a52e04 2005-12-26 devnull int p9request; /* true if this is a bootp with plan9 options */
36 87a52e04 2005-12-26 devnull int genrequest; /* true if this is a bootp with generic options */
37 87a52e04 2005-12-26 devnull int dhcptype; /* dhcp message type */
38 87a52e04 2005-12-26 devnull int leasetime; /* dhcp lease */
39 87a52e04 2005-12-26 devnull uchar ip[IPaddrlen]; /* requested address */
40 87a52e04 2005-12-26 devnull uchar server[IPaddrlen]; /* server address */
41 87a52e04 2005-12-26 devnull char msg[ERRMAX]; /* error message */
42 87a52e04 2005-12-26 devnull char vci[32]; /* vendor class id */
43 87a52e04 2005-12-26 devnull char *id; /* client id */
44 87a52e04 2005-12-26 devnull uchar requested[32]; /* requested params */
45 87a52e04 2005-12-26 devnull uchar vendorclass[32];
46 87a52e04 2005-12-26 devnull char cputype[32-3];
48 87a52e04 2005-12-26 devnull Info gii; /* about target network */
49 87a52e04 2005-12-26 devnull Info ii; /* about target system */
50 87a52e04 2005-12-26 devnull int staticbinding;
52 87a52e04 2005-12-26 devnull uchar buf[2*1024]; /* message buffer */
55 87a52e04 2005-12-26 devnull #define TFTP "/lib/tftpd"
56 87a52e04 2005-12-26 devnull char *blog = "ipboot";
57 87a52e04 2005-12-26 devnull char mysysname[64];
58 87a52e04 2005-12-26 devnull Ipifc *ipifcs;
59 87a52e04 2005-12-26 devnull int debug;
60 87a52e04 2005-12-26 devnull int nobootp;
61 87a52e04 2005-12-26 devnull long now;
62 87a52e04 2005-12-26 devnull int slow;
63 87a52e04 2005-12-26 devnull char net[256];
64 87a52e04 2005-12-26 devnull uchar xmyipaddr[IPaddrlen];
66 87a52e04 2005-12-26 devnull int pptponly; // only answer request that came from the pptp server
67 87a52e04 2005-12-26 devnull int mute;
68 87a52e04 2005-12-26 devnull int minlease = MinLease;
70 87a52e04 2005-12-26 devnull ulong start;
72 87a52e04 2005-12-26 devnull /* option magic */
73 87a52e04 2005-12-26 devnull char plan9opt[4] = { 'p', '9', ' ', ' ' };
74 87a52e04 2005-12-26 devnull char genericopt[4] = { 0x63, 0x82, 0x53, 0x63 };
76 87a52e04 2005-12-26 devnull /* well known addresses */
77 87a52e04 2005-12-26 devnull uchar zeros[Maxhwlen];
79 87a52e04 2005-12-26 devnull /* option debug buffer */
80 87a52e04 2005-12-26 devnull char optbuf[1024];
81 87a52e04 2005-12-26 devnull char *op;
82 87a52e04 2005-12-26 devnull char *oe = optbuf + sizeof(optbuf);
84 87a52e04 2005-12-26 devnull char *optname[256] =
86 87a52e04 2005-12-26 devnull [OBend] "end",
87 87a52e04 2005-12-26 devnull [OBpad] "pad",
88 87a52e04 2005-12-26 devnull [OBmask] "mask",
89 87a52e04 2005-12-26 devnull [OBtimeoff] "timeoff",
90 87a52e04 2005-12-26 devnull [OBrouter] "router",
91 87a52e04 2005-12-26 devnull [OBtimeserver] "time",
92 87a52e04 2005-12-26 devnull [OBnameserver] "name",
93 87a52e04 2005-12-26 devnull [OBdnserver] "dns",
94 87a52e04 2005-12-26 devnull [OBlogserver] "log",
95 87a52e04 2005-12-26 devnull [OBcookieserver] "cookie",
96 87a52e04 2005-12-26 devnull [OBlprserver] "lpr",
97 87a52e04 2005-12-26 devnull [OBimpressserver] "impress",
98 87a52e04 2005-12-26 devnull [OBrlserver] "rl",
99 87a52e04 2005-12-26 devnull [OBhostname] "host",
100 87a52e04 2005-12-26 devnull [OBbflen] "bflen",
101 87a52e04 2005-12-26 devnull [OBdumpfile] "dumpfile",
102 87a52e04 2005-12-26 devnull [OBdomainname] "dom",
103 87a52e04 2005-12-26 devnull [OBswapserver] "swap",
104 87a52e04 2005-12-26 devnull [OBrootpath] "rootpath",
105 87a52e04 2005-12-26 devnull [OBextpath] "extpath",
106 87a52e04 2005-12-26 devnull [OBipforward] "ipforward",
107 87a52e04 2005-12-26 devnull [OBnonlocal] "nonlocal",
108 87a52e04 2005-12-26 devnull [OBpolicyfilter] "policyfilter",
109 87a52e04 2005-12-26 devnull [OBmaxdatagram] "maxdatagram",
110 87a52e04 2005-12-26 devnull [OBttl] "ttl",
111 87a52e04 2005-12-26 devnull [OBpathtimeout] "pathtimeout",
112 87a52e04 2005-12-26 devnull [OBpathplateau] "pathplateau",
113 87a52e04 2005-12-26 devnull [OBmtu] "mtu",
114 87a52e04 2005-12-26 devnull [OBsubnetslocal] "subnetslocal",
115 87a52e04 2005-12-26 devnull [OBbaddr] "baddr",
116 87a52e04 2005-12-26 devnull [OBdiscovermask] "discovermask",
117 87a52e04 2005-12-26 devnull [OBsupplymask] "supplymask",
118 87a52e04 2005-12-26 devnull [OBdiscoverrouter] "discoverrouter",
119 87a52e04 2005-12-26 devnull [OBrsserver] "rsserver",
120 87a52e04 2005-12-26 devnull [OBstaticroutes] "staticroutes",
121 87a52e04 2005-12-26 devnull [OBtrailerencap] "trailerencap",
122 87a52e04 2005-12-26 devnull [OBarptimeout] "arptimeout",
123 87a52e04 2005-12-26 devnull [OBetherencap] "etherencap",
124 87a52e04 2005-12-26 devnull [OBtcpttl] "tcpttl",
125 87a52e04 2005-12-26 devnull [OBtcpka] "tcpka",
126 87a52e04 2005-12-26 devnull [OBtcpkag] "tcpkag",
127 87a52e04 2005-12-26 devnull [OBnisdomain] "nisdomain",
128 87a52e04 2005-12-26 devnull [OBniserver] "niserver",
129 87a52e04 2005-12-26 devnull [OBntpserver] "ntpserver",
130 87a52e04 2005-12-26 devnull [OBvendorinfo] "vendorinfo",
131 87a52e04 2005-12-26 devnull [OBnetbiosns] "NBns",
132 87a52e04 2005-12-26 devnull [OBnetbiosdds] "NBdds",
133 87a52e04 2005-12-26 devnull [OBnetbiostype] "NBtype",
134 87a52e04 2005-12-26 devnull [OBnetbiosscope] "NBscope",
135 87a52e04 2005-12-26 devnull [OBxfontserver] "xfont",
136 87a52e04 2005-12-26 devnull [OBxdispmanager] "xdisp",
137 87a52e04 2005-12-26 devnull [OBnisplusdomain] "NPdomain",
138 87a52e04 2005-12-26 devnull [OBnisplusserver] "NP",
139 87a52e04 2005-12-26 devnull [OBhomeagent] "homeagent",
140 87a52e04 2005-12-26 devnull [OBsmtpserver] "smtp",
141 87a52e04 2005-12-26 devnull [OBpop3server] "pop3",
142 87a52e04 2005-12-26 devnull [OBnntpserver] "nntp",
143 87a52e04 2005-12-26 devnull [OBwwwserver] "www",
144 87a52e04 2005-12-26 devnull [OBfingerserver] "finger",
145 87a52e04 2005-12-26 devnull [OBircserver] "ircserver",
146 87a52e04 2005-12-26 devnull [OBstserver] "stserver",
147 87a52e04 2005-12-26 devnull [OBstdaserver] "stdaserver",
149 87a52e04 2005-12-26 devnull /* dhcp options */
150 87a52e04 2005-12-26 devnull [ODipaddr] "ip",
151 87a52e04 2005-12-26 devnull [ODlease] "leas",
152 87a52e04 2005-12-26 devnull [ODoverload] "overload",
153 87a52e04 2005-12-26 devnull [ODtype] "typ",
154 87a52e04 2005-12-26 devnull [ODserverid] "sid",
155 87a52e04 2005-12-26 devnull [ODparams] "params",
156 87a52e04 2005-12-26 devnull [ODmessage] "message",
157 87a52e04 2005-12-26 devnull [ODmaxmsg] "maxmsg",
158 87a52e04 2005-12-26 devnull [ODrenewaltime] "renewaltime",
159 87a52e04 2005-12-26 devnull [ODrebindingtime] "rebindingtime",
160 87a52e04 2005-12-26 devnull [ODvendorclass] "vendorclass",
161 87a52e04 2005-12-26 devnull [ODclientid] "cid",
162 87a52e04 2005-12-26 devnull [ODtftpserver] "tftpserver",
163 87a52e04 2005-12-26 devnull [ODbootfile] "bf",
166 87a52e04 2005-12-26 devnull void addropt(Req*, int, uchar*);
167 87a52e04 2005-12-26 devnull void addrsopt(Req*, int, uchar**, int);
168 87a52e04 2005-12-26 devnull void arpenter(uchar*, uchar*);
169 87a52e04 2005-12-26 devnull void bootp(Req*);
170 87a52e04 2005-12-26 devnull void byteopt(Req*, int, uchar);
171 87a52e04 2005-12-26 devnull void dhcp(Req*);
172 87a52e04 2005-12-26 devnull void fatal(int, char*, ...);
173 87a52e04 2005-12-26 devnull void hexopt(Req*, int, char*);
174 87a52e04 2005-12-26 devnull void longopt(Req*, int, long);
175 87a52e04 2005-12-26 devnull void maskopt(Req*, int, uchar*);
176 87a52e04 2005-12-26 devnull void miscoptions(Req*, uchar*);
177 87a52e04 2005-12-26 devnull int openlisten(char *net);
178 87a52e04 2005-12-26 devnull void parseoptions(Req*);
179 87a52e04 2005-12-26 devnull void proto(Req*, int);
180 87a52e04 2005-12-26 devnull void rcvdecline(Req*);
181 87a52e04 2005-12-26 devnull void rcvdiscover(Req*);
182 87a52e04 2005-12-26 devnull void rcvinform(Req*);
183 87a52e04 2005-12-26 devnull void rcvrelease(Req*);
184 87a52e04 2005-12-26 devnull void rcvrequest(Req*);
185 87a52e04 2005-12-26 devnull char* readsysname(void);
186 87a52e04 2005-12-26 devnull void remrequested(Req*, int);
187 87a52e04 2005-12-26 devnull void sendack(Req*, uchar*, int, int);
188 87a52e04 2005-12-26 devnull void sendnak(Req*, char*);
189 87a52e04 2005-12-26 devnull void sendoffer(Req*, uchar*, int);
190 87a52e04 2005-12-26 devnull void stringopt(Req*, int, char*);
191 87a52e04 2005-12-26 devnull void termopt(Req*);
192 87a52e04 2005-12-26 devnull int validip(uchar*);
193 87a52e04 2005-12-26 devnull void vectoropt(Req*, int, uchar*, int);
194 87a52e04 2005-12-26 devnull void warning(int, char*, ...);
195 87a52e04 2005-12-26 devnull void logdhcp(Req*);
196 87a52e04 2005-12-26 devnull void logdhcpout(Req *, char *);
197 87a52e04 2005-12-26 devnull int readlast(int, Udphdr*, uchar*, int);
200 87a52e04 2005-12-26 devnull timestamp(char *tag)
202 87a52e04 2005-12-26 devnull ulong t;
204 87a52e04 2005-12-26 devnull t = nsec()/1000;
205 87a52e04 2005-12-26 devnull syslog(0, blog, "%s %lud", tag, t - start);
209 87a52e04 2005-12-26 devnull usage(void)
211 87a52e04 2005-12-26 devnull fprint(2, "usage: dhcp [-dmsnp] [-f directory] [-x netmtpt] [-M minlease] addr n [addr n ...]\n");
212 87a52e04 2005-12-26 devnull exits("usage");
216 87a52e04 2005-12-26 devnull main(int argc, char **argv)
218 87a52e04 2005-12-26 devnull int i, n, fd;
219 87a52e04 2005-12-26 devnull char *p;
220 87a52e04 2005-12-26 devnull uchar ip[IPaddrlen];
223 87a52e04 2005-12-26 devnull fmtinstall('E', eipfmt);
224 87a52e04 2005-12-26 devnull fmtinstall('I', eipfmt);
225 87a52e04 2005-12-26 devnull fmtinstall('V', eipfmt);
226 87a52e04 2005-12-26 devnull fmtinstall('M', eipfmt);
227 87a52e04 2005-12-26 devnull ARGBEGIN {
228 87a52e04 2005-12-26 devnull case 'm':
229 87a52e04 2005-12-26 devnull mute = 1;
231 87a52e04 2005-12-26 devnull case 'd':
232 87a52e04 2005-12-26 devnull debug = 1;
234 87a52e04 2005-12-26 devnull case 'f':
235 87a52e04 2005-12-26 devnull p = ARGF();
236 87a52e04 2005-12-26 devnull if(p == nil)
237 87a52e04 2005-12-26 devnull usage();
238 87a52e04 2005-12-26 devnull ndbfile = p;
240 87a52e04 2005-12-26 devnull case 's':
241 87a52e04 2005-12-26 devnull slow = 1;
243 87a52e04 2005-12-26 devnull case 'n':
244 87a52e04 2005-12-26 devnull nobootp = 1;
246 87a52e04 2005-12-26 devnull case 'i':
247 87a52e04 2005-12-26 devnull parseip(xmyipaddr,EARGF(usage()));
249 87a52e04 2005-12-26 devnull case 'p':
250 87a52e04 2005-12-26 devnull pptponly = 1;
252 87a52e04 2005-12-26 devnull case 'M':
253 87a52e04 2005-12-26 devnull p = ARGF();
254 87a52e04 2005-12-26 devnull if(p == nil)
255 87a52e04 2005-12-26 devnull usage();
256 87a52e04 2005-12-26 devnull minlease = atoi(p);
257 87a52e04 2005-12-26 devnull if(minlease <= 0)
258 87a52e04 2005-12-26 devnull minlease = MinLease;
260 87a52e04 2005-12-26 devnull } ARGEND;
262 87a52e04 2005-12-26 devnull while(argc > 1){
263 87a52e04 2005-12-26 devnull parseip(ip, argv[0]);
264 87a52e04 2005-12-26 devnull if(!validip(ip))
265 87a52e04 2005-12-26 devnull usage();
266 87a52e04 2005-12-26 devnull n = atoi(argv[1]);
267 87a52e04 2005-12-26 devnull if(n <= 0)
268 87a52e04 2005-12-26 devnull usage();
269 87a52e04 2005-12-26 devnull initbinding(ip, n);
270 87a52e04 2005-12-26 devnull argc -= 2;
271 87a52e04 2005-12-26 devnull argv += 2;
274 87a52e04 2005-12-26 devnull /* for debugging */
275 87a52e04 2005-12-26 devnull for(i = 0; i < 256; i++)
276 87a52e04 2005-12-26 devnull if(optname[i] == 0)
277 87a52e04 2005-12-26 devnull optname[i] = smprint("%d", i);
279 87a52e04 2005-12-26 devnull /* what is my name? */
280 87a52e04 2005-12-26 devnull p = readsysname();
281 87a52e04 2005-12-26 devnull strcpy(mysysname, p);
283 87a52e04 2005-12-26 devnull /* put process in background */
284 87a52e04 2005-12-26 devnull if(!debug) switch(rfork(RFNOTEG|RFPROC|RFFDG)) {
285 87a52e04 2005-12-26 devnull case -1:
286 87a52e04 2005-12-26 devnull fatal(1, "fork");
289 87a52e04 2005-12-26 devnull default:
290 87a52e04 2005-12-26 devnull exits(0);
293 87a52e04 2005-12-26 devnull chdir(TFTP);
294 87a52e04 2005-12-26 devnull fd = openlisten(net);
295 87a52e04 2005-12-26 devnull wfd = fd;
296 87a52e04 2005-12-26 devnull bwfd = fd;
297 87a52e04 2005-12-26 devnull if(setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, "eth0", 5) < 0)
298 87a52e04 2005-12-26 devnull print("setsockopt: %r\n");
300 87a52e04 2005-12-26 devnull for(;;){
301 87a52e04 2005-12-26 devnull memset(&r, 0, sizeof(r));
302 87a52e04 2005-12-26 devnull r.fd = fd;
303 87a52e04 2005-12-26 devnull n = readlast(fd, &r.uh, r.buf, sizeof(r.buf));
304 87a52e04 2005-12-26 devnull if(n < 0)
305 87a52e04 2005-12-26 devnull fatal(1, "error reading requests");
306 87a52e04 2005-12-26 devnull start = nsec()/1000;
307 87a52e04 2005-12-26 devnull op = optbuf;
308 87a52e04 2005-12-26 devnull *op = 0;
309 87a52e04 2005-12-26 devnull proto(&r, n);
310 87a52e04 2005-12-26 devnull if(r.id != nil)
311 87a52e04 2005-12-26 devnull free(r.id);
316 87a52e04 2005-12-26 devnull proto(Req *rp, int n)
318 87a52e04 2005-12-26 devnull uchar relip[IPaddrlen];
319 87a52e04 2005-12-26 devnull char buf[64];
321 87a52e04 2005-12-26 devnull now = time(0);
323 87a52e04 2005-12-26 devnull rp->e = rp->buf + n;
324 87a52e04 2005-12-26 devnull rp->bp = (Bootp*)rp->buf;
325 87a52e04 2005-12-26 devnull rp->up = &rp->uh;
326 87a52e04 2005-12-26 devnull rp->max = rp->buf + MINSUPPORTED - IPUDPHDRSIZE;
327 87a52e04 2005-12-26 devnull rp->p = rp->bp->optdata;
328 87a52e04 2005-12-26 devnull v4tov6(rp->giaddr, rp->bp->giaddr);
329 87a52e04 2005-12-26 devnull v4tov6(rp->ciaddr, rp->bp->ciaddr);
331 87a52e04 2005-12-26 devnull if(pptponly && rp->bp->htype != 0)
334 87a52e04 2005-12-26 devnull ipifcs = readipifc(net, ipifcs, -1);
335 87a52e04 2005-12-26 devnull if(validip(rp->giaddr))
336 87a52e04 2005-12-26 devnull ipmove(relip, rp->giaddr);
337 87a52e04 2005-12-26 devnull else if(validip(rp->up->raddr))
338 87a52e04 2005-12-26 devnull ipmove(relip, rp->up->raddr);
340 87a52e04 2005-12-26 devnull ipmove(relip, xmyipaddr);
341 87a52e04 2005-12-26 devnull ipmove(rp->up->laddr, xmyipaddr);
342 87a52e04 2005-12-26 devnull if(rp->e < (uchar*)rp->bp->sname){
343 87a52e04 2005-12-26 devnull warning(0, "packet too short");
346 87a52e04 2005-12-26 devnull if(rp->bp->op != Bootrequest){
347 87a52e04 2005-12-26 devnull warning(0, "not bootrequest");
351 87a52e04 2005-12-26 devnull if(rp->e >= rp->bp->optdata){
352 87a52e04 2005-12-26 devnull if(memcmp(rp->bp->optmagic, plan9opt, sizeof(rp->bp->optmagic)) == 0)
353 87a52e04 2005-12-26 devnull rp->p9request = 1;
354 87a52e04 2005-12-26 devnull if(memcmp(rp->bp->optmagic, genericopt, sizeof(rp->bp->optmagic)) == 0) {
355 87a52e04 2005-12-26 devnull rp->genrequest = 1;
356 87a52e04 2005-12-26 devnull parseoptions(rp);
359 87a52e04 2005-12-26 devnull rp->p = rp->bp->optdata;
361 87a52e04 2005-12-26 devnull /* If no id is specified, make one from the hardware address
362 87a52e04 2005-12-26 devnull * of the target. We assume all zeros is not a hardware address
363 87a52e04 2005-12-26 devnull * which could be a mistake.
365 87a52e04 2005-12-26 devnull if(rp->id == nil){
366 87a52e04 2005-12-26 devnull if(rp->bp->hlen > Maxhwlen){
367 87a52e04 2005-12-26 devnull warning(0, "hlen %d", rp->bp->hlen);
370 87a52e04 2005-12-26 devnull if(memcmp(zeros, rp->bp->chaddr, rp->bp->hlen) == 0){
371 87a52e04 2005-12-26 devnull warning(0, "no chaddr");
374 87a52e04 2005-12-26 devnull sprint(buf, "hwa%2.2ux_", rp->bp->htype);
375 87a52e04 2005-12-26 devnull rp->id = tohex(buf, rp->bp->chaddr, rp->bp->hlen);
378 87a52e04 2005-12-26 devnull /* info about gateway */
379 87a52e04 2005-12-26 devnull if(lookupip(relip, &rp->gii, 1) < 0){
380 87a52e04 2005-12-26 devnull warning(0, "lookupip failed");
384 87a52e04 2005-12-26 devnull /* info about target system */
385 87a52e04 2005-12-26 devnull if(lookup(rp->bp, &rp->ii, &rp->gii) == 0)
386 87a52e04 2005-12-26 devnull if(rp->ii.indb && rp->ii.dhcpgroup[0] == 0)
387 87a52e04 2005-12-26 devnull rp->staticbinding = 1;
389 87a52e04 2005-12-26 devnull if(rp->dhcptype)
390 87a52e04 2005-12-26 devnull dhcp(rp);
392 87a52e04 2005-12-26 devnull bootp(rp);
393 87a52e04 2005-12-26 devnull timestamp("done");
397 87a52e04 2005-12-26 devnull dhcp(Req *rp)
399 87a52e04 2005-12-26 devnull logdhcp(rp);
401 87a52e04 2005-12-26 devnull switch(rp->dhcptype){
402 87a52e04 2005-12-26 devnull case Discover:
403 87a52e04 2005-12-26 devnull if(slow)
404 87a52e04 2005-12-26 devnull sleep(500);
405 87a52e04 2005-12-26 devnull rcvdiscover(rp);
407 87a52e04 2005-12-26 devnull case Request:
408 87a52e04 2005-12-26 devnull rcvrequest(rp);
410 87a52e04 2005-12-26 devnull case Decline:
411 87a52e04 2005-12-26 devnull rcvdecline(rp);
413 87a52e04 2005-12-26 devnull case Release:
414 87a52e04 2005-12-26 devnull rcvrelease(rp);
416 87a52e04 2005-12-26 devnull case Inform:
417 87a52e04 2005-12-26 devnull rcvinform(rp);
423 87a52e04 2005-12-26 devnull rcvdiscover(Req *rp)
425 87a52e04 2005-12-26 devnull Binding *b, *nb;
427 87a52e04 2005-12-26 devnull if(rp->staticbinding){
428 87a52e04 2005-12-26 devnull sendoffer(rp, rp->ii.ipaddr, StaticLease);
433 87a52e04 2005-12-26 devnull * first look for an outstanding offer
435 87a52e04 2005-12-26 devnull b = idtooffer(rp->id, &rp->gii);
438 87a52e04 2005-12-26 devnull * rfc2131 says:
439 87a52e04 2005-12-26 devnull * If an address is available, the new address
440 87a52e04 2005-12-26 devnull * SHOULD be chosen as follows:
442 87a52e04 2005-12-26 devnull * o The client's current address as recorded in the client's current
443 87a52e04 2005-12-26 devnull * binding, ELSE
445 87a52e04 2005-12-26 devnull * o The client's previous address as recorded in the client's (now
446 87a52e04 2005-12-26 devnull * expired or released) binding, if that address is in the server's
447 87a52e04 2005-12-26 devnull * pool of available addresses and not already allocated, ELSE
449 87a52e04 2005-12-26 devnull * o The address requested in the 'Requested IP Address' option, if that
450 87a52e04 2005-12-26 devnull * address is valid and not already allocated, ELSE
452 87a52e04 2005-12-26 devnull * o A new address allocated from the server's pool of available
453 87a52e04 2005-12-26 devnull * addresses; the address is selected based on the subnet from which
454 87a52e04 2005-12-26 devnull * the message was received (if 'giaddr' is 0) or on the address of
455 87a52e04 2005-12-26 devnull * the relay agent that forwarded the message ('giaddr' when not 0).
457 87a52e04 2005-12-26 devnull if(b == nil){
458 87a52e04 2005-12-26 devnull b = idtobinding(rp->id, &rp->gii, 1);
459 87a52e04 2005-12-26 devnull if(b && b->boundto && strcmp(b->boundto, rp->id) != 0)
460 87a52e04 2005-12-26 devnull if(validip(rp->ip) && samenet(rp->ip, &rp->gii)){
461 87a52e04 2005-12-26 devnull nb = iptobinding(rp->ip, 0);
462 87a52e04 2005-12-26 devnull if(nb && nb->lease < now)
466 87a52e04 2005-12-26 devnull if(b == nil){
467 87a52e04 2005-12-26 devnull warning(0, "!Discover(%s via %I): no binding %I",
468 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ip);
471 87a52e04 2005-12-26 devnull mkoffer(b, rp->id, rp->leasetime);
472 87a52e04 2005-12-26 devnull sendoffer(rp, b->ip, b->offer);
476 87a52e04 2005-12-26 devnull rcvrequest(Req *rp)
478 87a52e04 2005-12-26 devnull Binding *b;
480 87a52e04 2005-12-26 devnull if(validip(rp->server)){
481 87a52e04 2005-12-26 devnull /* this is a reply to an offer - SELECTING */
483 87a52e04 2005-12-26 devnull /* check for hard assignment */
484 87a52e04 2005-12-26 devnull if(rp->staticbinding){
485 87a52e04 2005-12-26 devnull if(forme(rp->server))
486 87a52e04 2005-12-26 devnull sendack(rp, rp->ii.ipaddr, StaticLease, 1);
488 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): for server %I not me",
489 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->server);
493 87a52e04 2005-12-26 devnull b = idtooffer(rp->id, &rp->gii);
495 87a52e04 2005-12-26 devnull /* if we don't have an offer, nak */
496 87a52e04 2005-12-26 devnull if(b == nil){
497 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): no offer",
498 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr);
499 87a52e04 2005-12-26 devnull if(forme(rp->server))
500 87a52e04 2005-12-26 devnull sendnak(rp, "no offer for you");
504 87a52e04 2005-12-26 devnull /* if not for me, retract offer */
505 87a52e04 2005-12-26 devnull if(!forme(rp->server)){
506 87a52e04 2005-12-26 devnull b->expoffer = 0;
507 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): for server %I not me",
508 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->server);
513 87a52e04 2005-12-26 devnull * if the client is confused about what we offered, nak.
514 87a52e04 2005-12-26 devnull * client really shouldn't be specifying this when selecting
516 87a52e04 2005-12-26 devnull if(validip(rp->ip) && ipcmp(rp->ip, b->ip) != 0){
517 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): requests %I, not %I",
518 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ip, b->ip);
519 87a52e04 2005-12-26 devnull sendnak(rp, "bad ip address option");
522 87a52e04 2005-12-26 devnull if(commitbinding(b) < 0){
523 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): can't commit %I",
524 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, b->ip);
525 87a52e04 2005-12-26 devnull sendnak(rp, "can't commit binding");
528 87a52e04 2005-12-26 devnull sendack(rp, b->ip, b->offer, 1);
529 87a52e04 2005-12-26 devnull } else if(validip(rp->ip)){
531 87a52e04 2005-12-26 devnull * checking address/net - INIT-REBOOT
533 87a52e04 2005-12-26 devnull * This is a rebooting client that remembers its old
534 87a52e04 2005-12-26 devnull * address.
536 87a52e04 2005-12-26 devnull /* check for hard assignment */
537 87a52e04 2005-12-26 devnull if(rp->staticbinding){
538 87a52e04 2005-12-26 devnull if(memcmp(rp->ip, rp->ii.ipaddr, IPaddrlen) != 0){
539 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): %I not valid for %E",
540 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ip, rp->bp->chaddr);
541 87a52e04 2005-12-26 devnull sendnak(rp, "not valid");
543 87a52e04 2005-12-26 devnull sendack(rp, rp->ii.ipaddr, StaticLease, 1);
547 87a52e04 2005-12-26 devnull /* make sure the network makes sense */
548 87a52e04 2005-12-26 devnull if(!samenet(rp->ip, &rp->gii)){
549 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): bad forward of %I",
550 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ip);
551 87a52e04 2005-12-26 devnull sendnak(rp, "wrong network");
554 87a52e04 2005-12-26 devnull b = iptobinding(rp->ip, 0);
555 87a52e04 2005-12-26 devnull if(b == nil){
556 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): no binding for %I for",
557 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ip);
560 87a52e04 2005-12-26 devnull if(memcmp(rp->ip, b->ip, IPaddrlen) != 0 || now > b->lease){
561 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): %I not valid",
562 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ip);
563 87a52e04 2005-12-26 devnull sendnak(rp, "not valid");
566 87a52e04 2005-12-26 devnull b->offer = b->lease - now;
567 87a52e04 2005-12-26 devnull sendack(rp, b->ip, b->offer, 1);
568 87a52e04 2005-12-26 devnull } else if(validip(rp->ciaddr)){
570 87a52e04 2005-12-26 devnull * checking address - RENEWING or REBINDING
572 87a52e04 2005-12-26 devnull * these states are indistinguishable in our action. The only
573 87a52e04 2005-12-26 devnull * difference is how close to lease expiration the client is.
574 87a52e04 2005-12-26 devnull * If it is really close, it broadcasts the request hoping that
575 87a52e04 2005-12-26 devnull * some server will answer.
578 87a52e04 2005-12-26 devnull /* check for hard assignment */
579 87a52e04 2005-12-26 devnull if(rp->staticbinding){
580 87a52e04 2005-12-26 devnull if(ipcmp(rp->ciaddr, rp->ii.ipaddr) != 0){
581 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): %I not valid",
582 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ciaddr);
583 87a52e04 2005-12-26 devnull sendnak(rp, "not valid");
585 87a52e04 2005-12-26 devnull sendack(rp, rp->ii.ipaddr, StaticLease, 1);
589 87a52e04 2005-12-26 devnull /* make sure the network makes sense */
590 87a52e04 2005-12-26 devnull if(!samenet(rp->ciaddr, &rp->gii)){
591 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): bad forward of %I",
592 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ip);
593 87a52e04 2005-12-26 devnull sendnak(rp, "wrong network");
596 87a52e04 2005-12-26 devnull b = iptobinding(rp->ciaddr, 0);
597 87a52e04 2005-12-26 devnull if(b == nil){
598 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): no binding for %I",
599 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ciaddr);
602 87a52e04 2005-12-26 devnull if(ipcmp(rp->ciaddr, b->ip) != 0){
603 87a52e04 2005-12-26 devnull warning(0, "!Request(%I via %s): %I not valid",
604 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ciaddr);
605 87a52e04 2005-12-26 devnull sendnak(rp, "invalid ip address");
608 87a52e04 2005-12-26 devnull mkoffer(b, rp->id, rp->leasetime);
609 87a52e04 2005-12-26 devnull if(commitbinding(b) < 0){
610 87a52e04 2005-12-26 devnull warning(0, "!Request(%s via %I): can't commit %I",
611 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, b->ip);
612 87a52e04 2005-12-26 devnull sendnak(rp, "can't commit binding");
615 87a52e04 2005-12-26 devnull sendack(rp, b->ip, b->offer, 1);
620 87a52e04 2005-12-26 devnull rcvdecline(Req *rp)
622 87a52e04 2005-12-26 devnull Binding *b;
623 87a52e04 2005-12-26 devnull char buf[64];
625 87a52e04 2005-12-26 devnull if(rp->staticbinding)
628 87a52e04 2005-12-26 devnull b = idtooffer(rp->id, &rp->gii);
629 87a52e04 2005-12-26 devnull if(b == nil){
630 87a52e04 2005-12-26 devnull warning(0, "!Decline(%s via %I): no binding",
631 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr);
635 87a52e04 2005-12-26 devnull /* mark ip address as in use */
636 87a52e04 2005-12-26 devnull snprint(buf, sizeof(buf), "declined by %s", rp->id);
637 87a52e04 2005-12-26 devnull mkoffer(b, buf, 0x7fffffff);
638 87a52e04 2005-12-26 devnull commitbinding(b);
642 87a52e04 2005-12-26 devnull rcvrelease(Req *rp)
644 87a52e04 2005-12-26 devnull Binding *b;
646 87a52e04 2005-12-26 devnull if(rp->staticbinding)
649 87a52e04 2005-12-26 devnull b = idtobinding(rp->id, &rp->gii, 0);
650 87a52e04 2005-12-26 devnull if(b == nil){
651 87a52e04 2005-12-26 devnull warning(0, "!Release(%s via %I): no binding",
652 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr);
655 87a52e04 2005-12-26 devnull if(strcmp(rp->id, b->boundto) != 0){
656 87a52e04 2005-12-26 devnull warning(0, "!Release(%s via %I): invalid release of %I",
657 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ip);
660 87a52e04 2005-12-26 devnull warning(0, "Release(%s via %I): releasing %I", b->boundto, rp->gii.ipaddr, b->ip);
661 87a52e04 2005-12-26 devnull if(releasebinding(b, rp->id) < 0)
662 87a52e04 2005-12-26 devnull warning(0, "release: couldn't release");
666 87a52e04 2005-12-26 devnull rcvinform(Req *rp)
668 87a52e04 2005-12-26 devnull Binding *b;
670 87a52e04 2005-12-26 devnull if(rp->staticbinding){
671 87a52e04 2005-12-26 devnull sendack(rp, rp->ii.ipaddr, 0, 0);
675 87a52e04 2005-12-26 devnull b = iptobinding(rp->ciaddr, 0);
676 87a52e04 2005-12-26 devnull if(b == nil){
677 87a52e04 2005-12-26 devnull warning(0, "!Inform(%s via %I): no binding for %I",
678 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr, rp->ip);
681 87a52e04 2005-12-26 devnull sendack(rp, b->ip, 0, 0);
685 87a52e04 2005-12-26 devnull setsiaddr(uchar *siaddr, uchar *saddr, uchar *laddr)
687 87a52e04 2005-12-26 devnull if(ipcmp(saddr, IPnoaddr) != 0){
688 87a52e04 2005-12-26 devnull v6tov4(siaddr, saddr);
689 87a52e04 2005-12-26 devnull return 0;
690 87a52e04 2005-12-26 devnull } else {
691 87a52e04 2005-12-26 devnull v6tov4(siaddr, laddr);
692 87a52e04 2005-12-26 devnull return 1;
697 87a52e04 2005-12-26 devnull sendoffer(Req *rp, uchar *ip, int offer)
701 87a52e04 2005-12-26 devnull ushort flags;
702 87a52e04 2005-12-26 devnull Bootp *bp;
703 87a52e04 2005-12-26 devnull Udphdr *up;
705 87a52e04 2005-12-26 devnull bp = rp->bp;
706 87a52e04 2005-12-26 devnull up = rp->up;
709 87a52e04 2005-12-26 devnull * set destination
711 87a52e04 2005-12-26 devnull flags = nhgets(bp->flags);
712 87a52e04 2005-12-26 devnull fd = wfd;
713 87a52e04 2005-12-26 devnull if(validip(rp->giaddr)){
714 87a52e04 2005-12-26 devnull ipmove(up->raddr, rp->giaddr);
715 87a52e04 2005-12-26 devnull hnputs(up->rport, 67);
716 87a52e04 2005-12-26 devnull } else if(flags & Fbroadcast){
717 87a52e04 2005-12-26 devnull fd = bwfd;
718 87a52e04 2005-12-26 devnull ipmove(up->raddr, IPv4bcast);
719 87a52e04 2005-12-26 devnull hnputs(up->rport, 68);
720 87a52e04 2005-12-26 devnull } else {
721 87a52e04 2005-12-26 devnull ipmove(up->raddr, ip);
722 87a52e04 2005-12-26 devnull if(bp->htype == 1)
723 87a52e04 2005-12-26 devnull arpenter(up->raddr, bp->chaddr);
724 87a52e04 2005-12-26 devnull hnputs(up->rport, 68);
728 87a52e04 2005-12-26 devnull * fill in standard bootp part
730 87a52e04 2005-12-26 devnull bp->op = Bootreply;
731 87a52e04 2005-12-26 devnull bp->hops = 0;
732 87a52e04 2005-12-26 devnull hnputs(bp->secs, 0);
733 87a52e04 2005-12-26 devnull memset(bp->ciaddr, 0, sizeof(bp->ciaddr));
734 87a52e04 2005-12-26 devnull v6tov4(bp->giaddr, rp->giaddr);
735 87a52e04 2005-12-26 devnull v6tov4(bp->yiaddr, ip);
736 87a52e04 2005-12-26 devnull setsiaddr(bp->siaddr, rp->ii.tftp, up->laddr);
737 87a52e04 2005-12-26 devnull strncpy(bp->sname, mysysname, sizeof(bp->sname));
738 87a52e04 2005-12-26 devnull strncpy(bp->file, rp->ii.bootf, sizeof(bp->file));
741 87a52e04 2005-12-26 devnull * set options
743 87a52e04 2005-12-26 devnull byteopt(rp, ODtype, Offer);
744 87a52e04 2005-12-26 devnull longopt(rp, ODlease, offer);
745 87a52e04 2005-12-26 devnull addropt(rp, ODserverid, up->laddr);
746 87a52e04 2005-12-26 devnull miscoptions(rp, ip);
747 87a52e04 2005-12-26 devnull termopt(rp);
749 87a52e04 2005-12-26 devnull logdhcpout(rp, "Offer");
754 87a52e04 2005-12-26 devnull n = rp->p - rp->buf;
755 87a52e04 2005-12-26 devnull print("OFFER: %I %I %d %d\n", rp->up->laddr, rp->up->raddr, nhgets(rp->up->lport), nhgets(rp->up->rport));
756 87a52e04 2005-12-26 devnull if(!mute && udpwrite(fd, rp->up, rp->buf, n) != n)
757 87a52e04 2005-12-26 devnull warning(0, "offer: write failed: %r");
761 87a52e04 2005-12-26 devnull sendack(Req *rp, uchar *ip, int offer, int sendlease)
763 87a52e04 2005-12-26 devnull int n, fd;
764 87a52e04 2005-12-26 devnull ushort flags;
765 87a52e04 2005-12-26 devnull Bootp *bp;
766 87a52e04 2005-12-26 devnull Udphdr *up;
768 87a52e04 2005-12-26 devnull bp = rp->bp;
769 87a52e04 2005-12-26 devnull up = rp->up;
772 87a52e04 2005-12-26 devnull * set destination
774 87a52e04 2005-12-26 devnull fd = wfd;
775 87a52e04 2005-12-26 devnull flags = nhgets(bp->flags);
776 87a52e04 2005-12-26 devnull if(validip(rp->giaddr)){
777 87a52e04 2005-12-26 devnull ipmove(up->raddr, rp->giaddr);
778 87a52e04 2005-12-26 devnull hnputs(up->rport, 67);
779 87a52e04 2005-12-26 devnull } else if(flags & Fbroadcast){
780 87a52e04 2005-12-26 devnull fd = bwfd;
781 87a52e04 2005-12-26 devnull ipmove(up->raddr, IPv4bcast);
782 87a52e04 2005-12-26 devnull hnputs(up->rport, 68);
783 87a52e04 2005-12-26 devnull } else {
784 87a52e04 2005-12-26 devnull ipmove(up->raddr, ip);
785 87a52e04 2005-12-26 devnull if(bp->htype == 1)
786 87a52e04 2005-12-26 devnull arpenter(up->raddr, bp->chaddr);
787 87a52e04 2005-12-26 devnull hnputs(up->rport, 68);
791 87a52e04 2005-12-26 devnull * fill in standard bootp part
793 87a52e04 2005-12-26 devnull bp->op = Bootreply;
794 87a52e04 2005-12-26 devnull bp->hops = 0;
795 87a52e04 2005-12-26 devnull hnputs(bp->secs, 0);
796 87a52e04 2005-12-26 devnull v6tov4(bp->giaddr, rp->giaddr);
797 87a52e04 2005-12-26 devnull v6tov4(bp->yiaddr, ip);
798 87a52e04 2005-12-26 devnull setsiaddr(bp->siaddr, rp->ii.tftp, up->laddr);
799 87a52e04 2005-12-26 devnull strncpy(bp->sname, mysysname, sizeof(bp->sname));
800 87a52e04 2005-12-26 devnull strncpy(bp->file, rp->ii.bootf, sizeof(bp->file));
803 87a52e04 2005-12-26 devnull * set options
805 87a52e04 2005-12-26 devnull byteopt(rp, ODtype, Ack);
806 87a52e04 2005-12-26 devnull if(sendlease){
807 87a52e04 2005-12-26 devnull longopt(rp, ODlease, offer);
809 87a52e04 2005-12-26 devnull addropt(rp, ODserverid, up->laddr);
810 87a52e04 2005-12-26 devnull miscoptions(rp, ip);
811 87a52e04 2005-12-26 devnull termopt(rp);
813 87a52e04 2005-12-26 devnull logdhcpout(rp, "Ack");
818 87a52e04 2005-12-26 devnull n = rp->p - rp->buf;
819 87a52e04 2005-12-26 devnull if(!mute && udpwrite(fd, rp->up, rp->buf, n) != n)
820 87a52e04 2005-12-26 devnull warning(0, "ack: write failed: %r");
824 87a52e04 2005-12-26 devnull sendnak(Req *rp, char *msg)
826 87a52e04 2005-12-26 devnull int n, fd;
827 87a52e04 2005-12-26 devnull Bootp *bp;
828 87a52e04 2005-12-26 devnull Udphdr *up;
830 87a52e04 2005-12-26 devnull bp = rp->bp;
831 87a52e04 2005-12-26 devnull up = rp->up;
834 87a52e04 2005-12-26 devnull * set destination (always broadcast)
836 87a52e04 2005-12-26 devnull fd = wfd;
837 87a52e04 2005-12-26 devnull if(validip(rp->giaddr)){
838 87a52e04 2005-12-26 devnull ipmove(up->raddr, rp->giaddr);
839 87a52e04 2005-12-26 devnull hnputs(up->rport, 67);
840 87a52e04 2005-12-26 devnull } else {
841 87a52e04 2005-12-26 devnull fd = bwfd;
842 87a52e04 2005-12-26 devnull ipmove(up->raddr, IPv4bcast);
843 87a52e04 2005-12-26 devnull hnputs(up->rport, 68);
847 87a52e04 2005-12-26 devnull * fill in standard bootp part
849 87a52e04 2005-12-26 devnull bp->op = Bootreply;
850 87a52e04 2005-12-26 devnull bp->hops = 0;
851 87a52e04 2005-12-26 devnull hnputs(bp->secs, 0);
852 87a52e04 2005-12-26 devnull v6tov4(bp->giaddr, rp->giaddr);
853 87a52e04 2005-12-26 devnull memset(bp->ciaddr, 0, sizeof(bp->ciaddr));
854 87a52e04 2005-12-26 devnull memset(bp->yiaddr, 0, sizeof(bp->yiaddr));
855 87a52e04 2005-12-26 devnull memset(bp->siaddr, 0, sizeof(bp->siaddr));
858 87a52e04 2005-12-26 devnull * set options
860 87a52e04 2005-12-26 devnull byteopt(rp, ODtype, Nak);
861 87a52e04 2005-12-26 devnull addropt(rp, ODserverid, up->laddr);
863 87a52e04 2005-12-26 devnull stringopt(rp, ODmessage, msg);
864 87a52e04 2005-12-26 devnull if(strncmp(rp->id, "id", 2) == 0)
865 87a52e04 2005-12-26 devnull hexopt(rp, ODclientid, rp->id+2);
866 87a52e04 2005-12-26 devnull termopt(rp);
868 87a52e04 2005-12-26 devnull logdhcpout(rp, "Nak");
871 87a52e04 2005-12-26 devnull * send nak
873 87a52e04 2005-12-26 devnull n = rp->p - rp->buf;
874 87a52e04 2005-12-26 devnull if(!mute && udpwrite(fd, rp->up, rp->buf, n) != n)
875 87a52e04 2005-12-26 devnull warning(0, "nak: write failed: %r");
879 87a52e04 2005-12-26 devnull bootp(Req *rp)
881 87a52e04 2005-12-26 devnull int n, fd;
882 87a52e04 2005-12-26 devnull Bootp *bp;
883 87a52e04 2005-12-26 devnull Udphdr *up;
884 87a52e04 2005-12-26 devnull ushort flags;
885 87a52e04 2005-12-26 devnull Iplifc *lifc;
886 87a52e04 2005-12-26 devnull Info *iip;
888 87a52e04 2005-12-26 devnull warning(0, "bootp %s %I->%I from %s via %I, file %s",
889 87a52e04 2005-12-26 devnull rp->genrequest ? "generic" : (rp->p9request ? "p9" : ""),
890 87a52e04 2005-12-26 devnull rp->up->raddr, rp->up->laddr,
891 87a52e04 2005-12-26 devnull rp->id, rp->gii.ipaddr,
892 87a52e04 2005-12-26 devnull rp->bp->file);
894 87a52e04 2005-12-26 devnull if(nobootp)
897 87a52e04 2005-12-26 devnull bp = rp->bp;
898 87a52e04 2005-12-26 devnull up = rp->up;
899 87a52e04 2005-12-26 devnull iip = &rp->ii;
901 87a52e04 2005-12-26 devnull if(rp->staticbinding == 0){
902 87a52e04 2005-12-26 devnull warning(0, "bootp from unknown %s via %I", rp->id, rp->gii.ipaddr);
906 87a52e04 2005-12-26 devnull /* ignore if not for us */
907 87a52e04 2005-12-26 devnull if(*bp->sname){
908 87a52e04 2005-12-26 devnull if(strcmp(bp->sname, mysysname) != 0){
909 87a52e04 2005-12-26 devnull bp->sname[20] = 0;
910 87a52e04 2005-12-26 devnull warning(0, "bootp for server %s", bp->sname);
913 87a52e04 2005-12-26 devnull } else if(slow)
914 87a52e04 2005-12-26 devnull sleep(500);
916 87a52e04 2005-12-26 devnull /* ignore if we don't know what file to load */
917 87a52e04 2005-12-26 devnull if(*bp->file == 0){
918 87a52e04 2005-12-26 devnull if(rp->genrequest && *iip->bootf2) /* if not plan 9 and we have an alternate file... */
919 87a52e04 2005-12-26 devnull strncpy(bp->file, iip->bootf2, sizeof(bp->file));
920 87a52e04 2005-12-26 devnull else if(*iip->bootf)
921 87a52e04 2005-12-26 devnull strncpy(bp->file, iip->bootf, sizeof(bp->file));
922 87a52e04 2005-12-26 devnull else if(*bp->sname) /* if we were asked, respond no matter what */
923 87a52e04 2005-12-26 devnull bp->file[0] = '\0';
925 87a52e04 2005-12-26 devnull warning(0, "no bootfile for %I", iip->ipaddr);
930 87a52e04 2005-12-26 devnull /* ignore if the file is unreadable */
931 87a52e04 2005-12-26 devnull if((!rp->genrequest) && bp->file[0] && access(bp->file, 4) < 0){
932 87a52e04 2005-12-26 devnull warning(0, "inaccessible bootfile1 %s", bp->file);
936 87a52e04 2005-12-26 devnull bp->op = Bootreply;
937 87a52e04 2005-12-26 devnull v6tov4(bp->yiaddr, iip->ipaddr);
938 87a52e04 2005-12-26 devnull if(rp->p9request){
939 87a52e04 2005-12-26 devnull warning(0, "p9bootp: %I", iip->ipaddr);
940 87a52e04 2005-12-26 devnull memmove(bp->optmagic, plan9opt, 4);
941 87a52e04 2005-12-26 devnull if(iip->gwip == 0)
942 87a52e04 2005-12-26 devnull v4tov6(iip->gwip, bp->giaddr);
943 87a52e04 2005-12-26 devnull rp->p += sprint((char*)rp->p, "%V %I %I %I", iip->ipmask+IPv4off, iip->fsip,
944 87a52e04 2005-12-26 devnull iip->auip, iip->gwip);
945 87a52e04 2005-12-26 devnull sprint(optbuf, "%s", (char*)(bp->optmagic));
946 87a52e04 2005-12-26 devnull } else if(rp->genrequest){
947 87a52e04 2005-12-26 devnull warning(0, "genericbootp: %I", iip->ipaddr);
948 87a52e04 2005-12-26 devnull memmove(bp->optmagic, genericopt, 4);
949 87a52e04 2005-12-26 devnull miscoptions(rp, iip->ipaddr);
950 87a52e04 2005-12-26 devnull termopt(rp);
951 87a52e04 2005-12-26 devnull } else if(iip->vendor[0] != 0) {
952 87a52e04 2005-12-26 devnull warning(0, "bootp vendor field: %s", iip->vendor);
953 87a52e04 2005-12-26 devnull memset(rp->p, 0, 128-4);
954 87a52e04 2005-12-26 devnull rp->p += sprint((char*)bp->optmagic, "%s", iip->vendor);
955 87a52e04 2005-12-26 devnull } else {
956 87a52e04 2005-12-26 devnull memset(rp->p, 0, 128-4);
957 87a52e04 2005-12-26 devnull rp->p += 128-4;
961 87a52e04 2005-12-26 devnull * set destination
963 87a52e04 2005-12-26 devnull fd = wfd;
964 87a52e04 2005-12-26 devnull flags = nhgets(bp->flags);
965 87a52e04 2005-12-26 devnull if(validip(rp->giaddr)){
966 87a52e04 2005-12-26 devnull ipmove(up->raddr, rp->giaddr);
967 87a52e04 2005-12-26 devnull hnputs(up->rport, 67);
968 87a52e04 2005-12-26 devnull } else if(flags & Fbroadcast){
969 87a52e04 2005-12-26 devnull fd = bwfd;
970 87a52e04 2005-12-26 devnull ipmove(up->raddr, IPv4bcast);
971 87a52e04 2005-12-26 devnull hnputs(up->rport, 68);
972 87a52e04 2005-12-26 devnull } else {
973 87a52e04 2005-12-26 devnull v4tov6(up->raddr, bp->yiaddr);
974 87a52e04 2005-12-26 devnull if(bp->htype == 1)
975 87a52e04 2005-12-26 devnull arpenter(up->raddr, bp->chaddr);
976 87a52e04 2005-12-26 devnull hnputs(up->rport, 68);
980 87a52e04 2005-12-26 devnull * select best local address if destination is directly connected
982 87a52e04 2005-12-26 devnull lifc = findlifc(up->raddr);
983 87a52e04 2005-12-26 devnull if(lifc)
984 87a52e04 2005-12-26 devnull ipmove(up->laddr, lifc->ip);
987 87a52e04 2005-12-26 devnull * our identity
989 87a52e04 2005-12-26 devnull strncpy(bp->sname, mysysname, sizeof(bp->sname));
992 87a52e04 2005-12-26 devnull * set tftp server
994 87a52e04 2005-12-26 devnull setsiaddr(bp->siaddr, iip->tftp, up->laddr);
995 87a52e04 2005-12-26 devnull if(rp->genrequest && *iip->bootf2)
996 87a52e04 2005-12-26 devnull setsiaddr(bp->siaddr, iip->tftp2, up->laddr);
999 87a52e04 2005-12-26 devnull * RFC 1048 says that we must pad vendor field with
1000 87a52e04 2005-12-26 devnull * zeros until we have a 64 byte field.
1002 87a52e04 2005-12-26 devnull n = rp->p - rp->bp->optdata;
1003 87a52e04 2005-12-26 devnull if(n < 64-4) {
1004 87a52e04 2005-12-26 devnull memset(rp->p, 0, (64-4)-n);
1005 87a52e04 2005-12-26 devnull rp->p += (64-4)-n;
1011 87a52e04 2005-12-26 devnull n = rp->p - rp->buf;
1012 87a52e04 2005-12-26 devnull if(!mute && udpwrite(fd, rp->up, rp->buf, n) != n)
1013 87a52e04 2005-12-26 devnull warning(0, "bootp: write failed: %r");
1015 87a52e04 2005-12-26 devnull warning(0, "bootp via %I: file %s xid(%ux)flag(%ux)ci(%V)gi(%V)yi(%V)si(%V) %s",
1016 87a52e04 2005-12-26 devnull up->raddr, bp->file, nhgetl(bp->xid), nhgets(bp->flags),
1017 87a52e04 2005-12-26 devnull bp->ciaddr, bp->giaddr, bp->yiaddr, bp->siaddr,
1018 87a52e04 2005-12-26 devnull optbuf);
1022 87a52e04 2005-12-26 devnull parseoptions(Req *rp)
1024 87a52e04 2005-12-26 devnull int n, c, code;
1025 87a52e04 2005-12-26 devnull uchar *o, *p;
1027 87a52e04 2005-12-26 devnull p = rp->p;
1029 87a52e04 2005-12-26 devnull while(p < rp->e){
1030 87a52e04 2005-12-26 devnull code = *p++;
1031 87a52e04 2005-12-26 devnull if(code == 255)
1033 87a52e04 2005-12-26 devnull if(code == 0)
1034 87a52e04 2005-12-26 devnull continue;
1036 87a52e04 2005-12-26 devnull /* ignore anything that's too long */
1037 87a52e04 2005-12-26 devnull n = *p++;
1039 87a52e04 2005-12-26 devnull p += n;
1040 87a52e04 2005-12-26 devnull if(p > rp->e)
1041 87a52e04 2005-12-26 devnull return;
1043 87a52e04 2005-12-26 devnull switch(code){
1044 87a52e04 2005-12-26 devnull case ODipaddr: /* requested ip address */
1045 87a52e04 2005-12-26 devnull if(n == IPv4addrlen)
1046 87a52e04 2005-12-26 devnull v4tov6(rp->ip, o);
1048 87a52e04 2005-12-26 devnull case ODlease: /* requested lease time */
1049 87a52e04 2005-12-26 devnull rp->leasetime = nhgetl(o);
1050 87a52e04 2005-12-26 devnull if(rp->leasetime > MaxLease || rp->leasetime < 0)
1051 87a52e04 2005-12-26 devnull rp->leasetime = MaxLease;
1053 87a52e04 2005-12-26 devnull case ODtype:
1054 87a52e04 2005-12-26 devnull c = *o;
1055 87a52e04 2005-12-26 devnull if(c < 10 && c > 0)
1056 87a52e04 2005-12-26 devnull rp->dhcptype = c;
1058 87a52e04 2005-12-26 devnull case ODserverid:
1059 87a52e04 2005-12-26 devnull if(n == IPv4addrlen)
1060 87a52e04 2005-12-26 devnull v4tov6(rp->server, o);
1062 87a52e04 2005-12-26 devnull case ODmessage:
1063 87a52e04 2005-12-26 devnull if(n > sizeof rp->msg-1)
1064 87a52e04 2005-12-26 devnull n = sizeof rp->msg-1;
1065 87a52e04 2005-12-26 devnull memmove(rp->msg, o, n);
1066 87a52e04 2005-12-26 devnull rp->msg[n] = 0;
1068 87a52e04 2005-12-26 devnull case ODmaxmsg:
1069 87a52e04 2005-12-26 devnull c = nhgets(o);
1070 87a52e04 2005-12-26 devnull c -= 28;
1071 87a52e04 2005-12-26 devnull if(c > 0)
1072 87a52e04 2005-12-26 devnull rp->max = rp->buf + c;
1074 87a52e04 2005-12-26 devnull case ODclientid:
1075 87a52e04 2005-12-26 devnull if(n <= 1)
1077 87a52e04 2005-12-26 devnull rp->id = toid( o, n);
1079 87a52e04 2005-12-26 devnull case ODparams:
1080 87a52e04 2005-12-26 devnull if(n > sizeof(rp->requested))
1081 87a52e04 2005-12-26 devnull n = sizeof(rp->requested);
1082 87a52e04 2005-12-26 devnull memmove(rp->requested, o, n);
1084 87a52e04 2005-12-26 devnull case ODvendorclass:
1085 87a52e04 2005-12-26 devnull if(n >= sizeof(rp->vendorclass))
1086 87a52e04 2005-12-26 devnull n = sizeof(rp->vendorclass)-1;
1087 87a52e04 2005-12-26 devnull memmove(rp->vendorclass, o, n);
1088 87a52e04 2005-12-26 devnull rp->vendorclass[n] = 0;
1089 87a52e04 2005-12-26 devnull if(strncmp((char*)rp->vendorclass, "p9-", 3) == 0)
1090 87a52e04 2005-12-26 devnull strcpy(rp->cputype, (char*)rp->vendorclass+3);
1092 87a52e04 2005-12-26 devnull case OBend:
1093 87a52e04 2005-12-26 devnull return;
1099 87a52e04 2005-12-26 devnull remrequested(Req *rp, int opt)
1101 87a52e04 2005-12-26 devnull uchar *p;
1103 87a52e04 2005-12-26 devnull p = memchr(rp->requested, opt, sizeof(rp->requested));
1104 87a52e04 2005-12-26 devnull if(p != nil)
1105 87a52e04 2005-12-26 devnull *p = OBpad;
1109 87a52e04 2005-12-26 devnull miscoptions(Req *rp, uchar *ip)
1111 87a52e04 2005-12-26 devnull char *p;
1112 87a52e04 2005-12-26 devnull int i, j;
1113 87a52e04 2005-12-26 devnull uchar *addrs[2];
1114 87a52e04 2005-12-26 devnull uchar x[2*IPaddrlen];
1115 87a52e04 2005-12-26 devnull uchar vopts[64];
1116 87a52e04 2005-12-26 devnull uchar *op, *omax;
1117 87a52e04 2005-12-26 devnull char *attr[100], **a;
1118 87a52e04 2005-12-26 devnull int na;
1119 87a52e04 2005-12-26 devnull Ndbtuple *t;
1121 87a52e04 2005-12-26 devnull addrs[0] = x;
1122 87a52e04 2005-12-26 devnull addrs[1] = x+IPaddrlen;
1124 87a52e04 2005-12-26 devnull /* always supply these */
1125 87a52e04 2005-12-26 devnull maskopt(rp, OBmask, rp->gii.ipmask);
1126 87a52e04 2005-12-26 devnull if(validip(rp->gii.gwip)){
1127 87a52e04 2005-12-26 devnull remrequested(rp, OBrouter);
1128 87a52e04 2005-12-26 devnull addropt(rp, OBrouter, rp->gii.gwip);
1129 87a52e04 2005-12-26 devnull } else if(validip(rp->giaddr)){
1130 87a52e04 2005-12-26 devnull remrequested(rp, OBrouter);
1131 87a52e04 2005-12-26 devnull addropt(rp, OBrouter, rp->giaddr);
1134 87a52e04 2005-12-26 devnull // OBhostname for the HP4000M switches
1135 87a52e04 2005-12-26 devnull // (this causes NT to log infinite errors - tough shit )
1136 87a52e04 2005-12-26 devnull if(*rp->ii.domain){
1137 87a52e04 2005-12-26 devnull remrequested(rp, OBhostname);
1138 87a52e04 2005-12-26 devnull stringopt(rp, OBhostname, rp->ii.domain);
1140 87a52e04 2005-12-26 devnull if(*rp->ii.rootpath)
1141 87a52e04 2005-12-26 devnull stringopt(rp, OBrootpath, rp->ii.rootpath);
1143 87a52e04 2005-12-26 devnull /* figure out what we need to lookup */
1144 87a52e04 2005-12-26 devnull na = 0;
1145 87a52e04 2005-12-26 devnull a = attr;
1146 87a52e04 2005-12-26 devnull if(*rp->ii.domain == 0)
1147 87a52e04 2005-12-26 devnull a[na++] = "dom";
1148 87a52e04 2005-12-26 devnull for(i = 0; i < sizeof(rp->requested); i++)
1149 87a52e04 2005-12-26 devnull switch(rp->requested[i]){
1150 87a52e04 2005-12-26 devnull case OBrouter:
1151 87a52e04 2005-12-26 devnull a[na++] = "@ipgw";
1153 87a52e04 2005-12-26 devnull case OBdnserver:
1154 87a52e04 2005-12-26 devnull a[na++] = "@dns";
1156 87a52e04 2005-12-26 devnull case OBnetbiosns:
1157 87a52e04 2005-12-26 devnull a[na++] = "@wins";
1159 87a52e04 2005-12-26 devnull case OBsmtpserver:
1160 87a52e04 2005-12-26 devnull a[na++] = "@smtp";
1162 87a52e04 2005-12-26 devnull case OBpop3server:
1163 87a52e04 2005-12-26 devnull a[na++] = "@pop3";
1165 87a52e04 2005-12-26 devnull case OBwwwserver:
1166 87a52e04 2005-12-26 devnull a[na++] = "@www";
1168 87a52e04 2005-12-26 devnull case OBntpserver:
1169 87a52e04 2005-12-26 devnull a[na++] = "@ntp";
1171 87a52e04 2005-12-26 devnull case OBtimeserver:
1172 87a52e04 2005-12-26 devnull a[na++] = "@time";
1175 87a52e04 2005-12-26 devnull if(strncmp((char*)rp->vendorclass, "plan9_", 6) == 0
1176 87a52e04 2005-12-26 devnull || strncmp((char*)rp->vendorclass, "p9-", 3) == 0){
1177 87a52e04 2005-12-26 devnull a[na++] = "@fs";
1178 87a52e04 2005-12-26 devnull a[na++] = "@auth";
1180 87a52e04 2005-12-26 devnull t = lookupinfo(ip, a, na);
1182 87a52e04 2005-12-26 devnull /* lookup anything we might be missing */
1183 87a52e04 2005-12-26 devnull if(*rp->ii.domain == 0)
1184 87a52e04 2005-12-26 devnull lookupname(rp->ii.domain, t);
1186 87a52e04 2005-12-26 devnull /* add any requested ones that we know about */
1187 87a52e04 2005-12-26 devnull for(i = 0; i < sizeof(rp->requested); i++)
1188 87a52e04 2005-12-26 devnull switch(rp->requested[i]){
1189 87a52e04 2005-12-26 devnull case OBrouter:
1190 87a52e04 2005-12-26 devnull j = lookupserver("ipgw", addrs, t);
1191 87a52e04 2005-12-26 devnull addrsopt(rp, OBrouter, addrs, j);
1193 87a52e04 2005-12-26 devnull case OBdnserver:
1194 87a52e04 2005-12-26 devnull j = lookupserver("dns", addrs, t);
1195 87a52e04 2005-12-26 devnull addrsopt(rp, OBdnserver, addrs, j);
1197 87a52e04 2005-12-26 devnull case OBhostname:
1198 87a52e04 2005-12-26 devnull if(*rp->ii.domain)
1199 87a52e04 2005-12-26 devnull stringopt(rp, OBhostname, rp->ii.domain);
1201 87a52e04 2005-12-26 devnull case OBdomainname:
1202 87a52e04 2005-12-26 devnull p = strchr(rp->ii.domain, '.');
1204 87a52e04 2005-12-26 devnull stringopt(rp, OBdomainname, p+1);
1206 87a52e04 2005-12-26 devnull case OBnetbiosns:
1207 87a52e04 2005-12-26 devnull j = lookupserver("wins", addrs, t);
1208 87a52e04 2005-12-26 devnull addrsopt(rp, OBnetbiosns, addrs, j);
1210 87a52e04 2005-12-26 devnull case OBnetbiostype:
1211 87a52e04 2005-12-26 devnull /* p-node: peer to peer WINS queries */
1212 87a52e04 2005-12-26 devnull byteopt(rp, OBnetbiostype, 0x2);
1214 87a52e04 2005-12-26 devnull case OBsmtpserver:
1215 87a52e04 2005-12-26 devnull j = lookupserver("smtp", addrs, t);
1216 87a52e04 2005-12-26 devnull addrsopt(rp, OBsmtpserver, addrs, j);
1218 87a52e04 2005-12-26 devnull case OBpop3server:
1219 87a52e04 2005-12-26 devnull j = lookupserver("pop3", addrs, t);
1220 87a52e04 2005-12-26 devnull addrsopt(rp, OBpop3server, addrs, j);
1222 87a52e04 2005-12-26 devnull case OBwwwserver:
1223 87a52e04 2005-12-26 devnull j = lookupserver("www", addrs, t);
1224 87a52e04 2005-12-26 devnull addrsopt(rp, OBwwwserver, addrs, j);
1226 87a52e04 2005-12-26 devnull case OBntpserver:
1227 87a52e04 2005-12-26 devnull j = lookupserver("ntp", addrs, t);
1228 87a52e04 2005-12-26 devnull addrsopt(rp, OBntpserver, addrs, j);
1230 87a52e04 2005-12-26 devnull case OBtimeserver:
1231 87a52e04 2005-12-26 devnull j = lookupserver("time", addrs, t);
1232 87a52e04 2005-12-26 devnull addrsopt(rp, OBtimeserver, addrs, j);
1234 87a52e04 2005-12-26 devnull case OBttl:
1235 87a52e04 2005-12-26 devnull byteopt(rp, OBttl, 255);
1239 87a52e04 2005-12-26 devnull // add plan9 specific options
1240 87a52e04 2005-12-26 devnull if(strncmp((char*)rp->vendorclass, "plan9_", 6) == 0
1241 87a52e04 2005-12-26 devnull || strncmp((char*)rp->vendorclass, "p9-", 3) == 0){
1242 87a52e04 2005-12-26 devnull // point to temporary area
1243 87a52e04 2005-12-26 devnull op = rp->p;
1244 87a52e04 2005-12-26 devnull omax = rp->max;
1245 87a52e04 2005-12-26 devnull rp->p = vopts;
1246 87a52e04 2005-12-26 devnull rp->max = vopts + sizeof(vopts) - 1;
1248 87a52e04 2005-12-26 devnull j = lookupserver("fs", addrs, t);
1249 87a52e04 2005-12-26 devnull addrsopt(rp, OP9fs, addrs, j);
1250 87a52e04 2005-12-26 devnull j = lookupserver("auth", addrs, t);
1251 87a52e04 2005-12-26 devnull addrsopt(rp, OP9auth, addrs, j);
1253 87a52e04 2005-12-26 devnull // point back
1254 87a52e04 2005-12-26 devnull j = rp->p - vopts;
1255 87a52e04 2005-12-26 devnull rp->p = op;
1256 87a52e04 2005-12-26 devnull rp->max = omax;
1257 87a52e04 2005-12-26 devnull vectoropt(rp, OBvendorinfo, vopts, j);
1260 87a52e04 2005-12-26 devnull ndbfree(t);
1264 87a52e04 2005-12-26 devnull openlisten(char *net)
1266 87a52e04 2005-12-26 devnull int fd;
1267 87a52e04 2005-12-26 devnull char data[128];
1268 87a52e04 2005-12-26 devnull char devdir[40];
1269 87a52e04 2005-12-26 devnull int yes;
1271 87a52e04 2005-12-26 devnull sprint(data, "udp!*!bootps");
1272 87a52e04 2005-12-26 devnull fd = announce(data, devdir);
1273 87a52e04 2005-12-26 devnull if(fd < 0)
1274 87a52e04 2005-12-26 devnull fatal(1, "can't announce");
1275 87a52e04 2005-12-26 devnull yes = 1;
1276 87a52e04 2005-12-26 devnull if(setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &yes, sizeof yes) < 0)
1277 87a52e04 2005-12-26 devnull fatal(1, "can't broadcast");
1278 87a52e04 2005-12-26 devnull return fd;
1282 87a52e04 2005-12-26 devnull fatal(int syserr, char *fmt, ...)
1284 87a52e04 2005-12-26 devnull char buf[ERRMAX];
1285 87a52e04 2005-12-26 devnull va_list arg;
1287 87a52e04 2005-12-26 devnull va_start(arg, fmt);
1288 87a52e04 2005-12-26 devnull vseprint(buf, buf+sizeof(buf), fmt, arg);
1289 87a52e04 2005-12-26 devnull va_end(arg);
1290 87a52e04 2005-12-26 devnull if(syserr)
1291 87a52e04 2005-12-26 devnull syslog(1, blog, "%s: %r", buf);
1293 87a52e04 2005-12-26 devnull syslog(1, blog, "%s", buf);
1294 87a52e04 2005-12-26 devnull exits(buf);
1297 87a52e04 2005-12-26 devnull extern void
1298 87a52e04 2005-12-26 devnull warning(int syserr, char *fmt, ...)
1300 87a52e04 2005-12-26 devnull char buf[256];
1301 87a52e04 2005-12-26 devnull va_list arg;
1303 87a52e04 2005-12-26 devnull va_start(arg, fmt);
1304 87a52e04 2005-12-26 devnull vseprint(buf, buf+sizeof(buf), fmt, arg);
1305 87a52e04 2005-12-26 devnull va_end(arg);
1306 87a52e04 2005-12-26 devnull if(syserr){
1307 87a52e04 2005-12-26 devnull syslog(0, blog, "%s: %r", buf);
1308 87a52e04 2005-12-26 devnull if(debug)
1309 87a52e04 2005-12-26 devnull fprint(2, "%s: %r\n", buf);
1310 87a52e04 2005-12-26 devnull } else {
1311 87a52e04 2005-12-26 devnull syslog(0, blog, "%s", buf);
1312 87a52e04 2005-12-26 devnull if(debug)
1313 87a52e04 2005-12-26 devnull fprint(2, "%s\n", buf);
1318 87a52e04 2005-12-26 devnull readsysname(void)
1320 87a52e04 2005-12-26 devnull static char name[128];
1321 87a52e04 2005-12-26 devnull char *p;
1322 87a52e04 2005-12-26 devnull int n, fd;
1324 87a52e04 2005-12-26 devnull fd = open("/dev/sysname", OREAD);
1325 87a52e04 2005-12-26 devnull if(fd >= 0){
1326 87a52e04 2005-12-26 devnull n = read(fd, name, sizeof(name)-1);
1327 87a52e04 2005-12-26 devnull close(fd);
1328 87a52e04 2005-12-26 devnull if(n > 0){
1329 87a52e04 2005-12-26 devnull name[n] = 0;
1330 87a52e04 2005-12-26 devnull return name;
1333 87a52e04 2005-12-26 devnull p = getenv("sysname");
1334 87a52e04 2005-12-26 devnull if(p == nil || *p == 0)
1335 87a52e04 2005-12-26 devnull return "unknown";
1336 87a52e04 2005-12-26 devnull return p;
1339 87a52e04 2005-12-26 devnull extern int
1340 87a52e04 2005-12-26 devnull validip(uchar *ip)
1342 87a52e04 2005-12-26 devnull if(ipcmp(ip, IPnoaddr) == 0)
1343 87a52e04 2005-12-26 devnull return 0;
1344 87a52e04 2005-12-26 devnull if(ipcmp(ip, v4prefix) == 0)
1345 87a52e04 2005-12-26 devnull return 0;
1346 87a52e04 2005-12-26 devnull return 1;
1350 87a52e04 2005-12-26 devnull longopt(Req *rp, int t, long v)
1352 87a52e04 2005-12-26 devnull if(rp->p + 6 > rp->max)
1353 87a52e04 2005-12-26 devnull return;
1354 87a52e04 2005-12-26 devnull *rp->p++ = t;
1355 87a52e04 2005-12-26 devnull *rp->p++ = 4;
1356 87a52e04 2005-12-26 devnull hnputl(rp->p, v);
1357 87a52e04 2005-12-26 devnull rp->p += 4;
1359 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%s(%ld)", optname[t], v);
1363 87a52e04 2005-12-26 devnull addropt(Req *rp, int t, uchar *ip)
1365 87a52e04 2005-12-26 devnull if(rp->p + 6 > rp->max)
1366 87a52e04 2005-12-26 devnull return;
1367 87a52e04 2005-12-26 devnull *rp->p++ = t;
1368 87a52e04 2005-12-26 devnull *rp->p++ = 4;
1369 87a52e04 2005-12-26 devnull memmove(rp->p, ip+IPv4off, 4);
1370 87a52e04 2005-12-26 devnull rp->p += 4;
1372 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%s(%I)", optname[t], ip);
1376 87a52e04 2005-12-26 devnull maskopt(Req *rp, int t, uchar *ip)
1378 87a52e04 2005-12-26 devnull if(rp->p + 6 > rp->max)
1379 87a52e04 2005-12-26 devnull return;
1380 87a52e04 2005-12-26 devnull *rp->p++ = t;
1381 87a52e04 2005-12-26 devnull *rp->p++ = 4;
1382 87a52e04 2005-12-26 devnull memmove(rp->p, ip+IPv4off, 4);
1383 87a52e04 2005-12-26 devnull rp->p += 4;
1385 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%s(%M)", optname[t], ip);
1389 87a52e04 2005-12-26 devnull addrsopt(Req *rp, int t, uchar **ip, int i)
1391 87a52e04 2005-12-26 devnull if(i <= 0)
1392 87a52e04 2005-12-26 devnull return;
1393 87a52e04 2005-12-26 devnull if(rp->p + 2 + 4*i > rp->max)
1394 87a52e04 2005-12-26 devnull return;
1395 87a52e04 2005-12-26 devnull *rp->p++ = t;
1396 87a52e04 2005-12-26 devnull *rp->p++ = 4*i;
1397 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%s(", optname[t]);
1398 87a52e04 2005-12-26 devnull while(i-- > 0){
1399 87a52e04 2005-12-26 devnull v6tov4(rp->p, *ip);
1400 87a52e04 2005-12-26 devnull rp->p += 4;
1401 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%I", *ip);
1403 87a52e04 2005-12-26 devnull if(i > 0)
1404 87a52e04 2005-12-26 devnull op = seprint(op, oe, " ");
1406 87a52e04 2005-12-26 devnull op = seprint(op, oe, ")");
1410 87a52e04 2005-12-26 devnull byteopt(Req *rp, int t, uchar v)
1412 87a52e04 2005-12-26 devnull if(rp->p + 3 > rp->max)
1413 87a52e04 2005-12-26 devnull return;
1414 87a52e04 2005-12-26 devnull *rp->p++ = t;
1415 87a52e04 2005-12-26 devnull *rp->p++ = 1;
1416 87a52e04 2005-12-26 devnull *rp->p++ = v;
1418 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%s(%d)", optname[t], v);
1422 87a52e04 2005-12-26 devnull termopt(Req *rp)
1424 87a52e04 2005-12-26 devnull if(rp->p + 1 > rp->max)
1425 87a52e04 2005-12-26 devnull return;
1426 87a52e04 2005-12-26 devnull *rp->p++ = OBend;
1430 87a52e04 2005-12-26 devnull stringopt(Req *rp, int t, char *str)
1434 87a52e04 2005-12-26 devnull n = strlen(str);
1435 87a52e04 2005-12-26 devnull if(n > 255)
1436 87a52e04 2005-12-26 devnull n = 255;
1437 87a52e04 2005-12-26 devnull if(rp->p+n+2 > rp->max)
1438 87a52e04 2005-12-26 devnull return;
1439 87a52e04 2005-12-26 devnull *rp->p++ = t;
1440 87a52e04 2005-12-26 devnull *rp->p++ = n;
1441 87a52e04 2005-12-26 devnull memmove(rp->p, str, n);
1442 87a52e04 2005-12-26 devnull rp->p += n;
1444 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%s(%s)", optname[t], str);
1448 87a52e04 2005-12-26 devnull vectoropt(Req *rp, int t, uchar *v, int n)
1452 87a52e04 2005-12-26 devnull if(n > 255)
1453 87a52e04 2005-12-26 devnull n = 255;
1454 87a52e04 2005-12-26 devnull if(rp->p+n+2 > rp->max)
1455 87a52e04 2005-12-26 devnull return;
1456 87a52e04 2005-12-26 devnull *rp->p++ = t;
1457 87a52e04 2005-12-26 devnull *rp->p++ = n;
1458 87a52e04 2005-12-26 devnull memmove(rp->p, v, n);
1459 87a52e04 2005-12-26 devnull rp->p += n;
1461 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%s(", optname[t]);
1462 87a52e04 2005-12-26 devnull if(n > 0)
1463 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%ud", 0);
1464 87a52e04 2005-12-26 devnull for(i = 1; i < n; i++)
1465 87a52e04 2005-12-26 devnull op = seprint(op, oe, " %ud", v[i]);
1469 87a52e04 2005-12-26 devnull fromhex(int x)
1471 87a52e04 2005-12-26 devnull if(x >= '0' && x <= '9')
1472 87a52e04 2005-12-26 devnull return x - '0';
1473 87a52e04 2005-12-26 devnull return x - 'a';
1477 87a52e04 2005-12-26 devnull hexopt(Req *rp, int t, char *str)
1481 87a52e04 2005-12-26 devnull n = strlen(str);
1482 87a52e04 2005-12-26 devnull n /= 2;
1483 87a52e04 2005-12-26 devnull if(n > 255)
1484 87a52e04 2005-12-26 devnull n = 255;
1485 87a52e04 2005-12-26 devnull if(rp->p+n+2 > rp->max)
1486 87a52e04 2005-12-26 devnull return;
1487 87a52e04 2005-12-26 devnull *rp->p++ = t;
1488 87a52e04 2005-12-26 devnull *rp->p++ = n;
1489 87a52e04 2005-12-26 devnull while(n-- > 0){
1490 87a52e04 2005-12-26 devnull *rp->p++ = (fromhex(str[0])<<4)|fromhex(str[1]);
1491 87a52e04 2005-12-26 devnull str += 2;
1494 87a52e04 2005-12-26 devnull op = seprint(op, oe, "%s(%s)", optname[t], str);
1498 87a52e04 2005-12-26 devnull * What a crock it is to do this for real.
1499 87a52e04 2005-12-26 devnull * A giant hairy mess of ioctls that differ from
1500 87a52e04 2005-12-26 devnull * system to system. Don't get sucked in.
1501 87a52e04 2005-12-26 devnull * This need not be fast.
1504 87a52e04 2005-12-26 devnull arpenter(uchar *ip, uchar *ether)
1506 87a52e04 2005-12-26 devnull int pid;
1507 87a52e04 2005-12-26 devnull char xip[100], xether[100];
1509 87a52e04 2005-12-26 devnull switch(pid=fork()){
1510 87a52e04 2005-12-26 devnull case -1:
1512 87a52e04 2005-12-26 devnull default:
1513 87a52e04 2005-12-26 devnull waitpid();
1515 87a52e04 2005-12-26 devnull case 0:
1516 87a52e04 2005-12-26 devnull snprint(xip, sizeof xip, "%I", ip);
1517 87a52e04 2005-12-26 devnull snprint(xether, sizeof xether, "%#E", ether);
1518 87a52e04 2005-12-26 devnull execl("arp", "arp", "-s", xip, xether, "temp", nil);
1519 87a52e04 2005-12-26 devnull _exits("execl");
1522 87a52e04 2005-12-26 devnull for comfort - ah, the good old days
1525 87a52e04 2005-12-26 devnull char buf[256];
1527 87a52e04 2005-12-26 devnull sprint(buf, "%s/arp", net);
1528 87a52e04 2005-12-26 devnull f = open(buf, OWRITE);
1529 87a52e04 2005-12-26 devnull if(f < 0){
1530 87a52e04 2005-12-26 devnull syslog(debug, blog, "open %s: %r", buf);
1531 87a52e04 2005-12-26 devnull return;
1533 87a52e04 2005-12-26 devnull fprint(f, "add ether %I %E", ip, ether);
1534 87a52e04 2005-12-26 devnull close(f);
1538 87a52e04 2005-12-26 devnull char *dhcpmsgname[] =
1540 87a52e04 2005-12-26 devnull [Discover] "Discover",
1541 87a52e04 2005-12-26 devnull [Offer] "Offer",
1542 87a52e04 2005-12-26 devnull [Request] "Request",
1543 87a52e04 2005-12-26 devnull [Decline] "Decline",
1544 87a52e04 2005-12-26 devnull [Ack] "Ack",
1545 87a52e04 2005-12-26 devnull [Nak] "Nak",
1546 87a52e04 2005-12-26 devnull [Release] "Release",
1547 87a52e04 2005-12-26 devnull [Inform] "Inform",
1551 87a52e04 2005-12-26 devnull logdhcp(Req *rp)
1553 87a52e04 2005-12-26 devnull char buf[4096];
1554 87a52e04 2005-12-26 devnull char *p, *e;
1557 87a52e04 2005-12-26 devnull p = buf;
1558 87a52e04 2005-12-26 devnull e = buf + sizeof(buf);
1559 87a52e04 2005-12-26 devnull if(rp->dhcptype > 0 && rp->dhcptype <= Inform)
1560 87a52e04 2005-12-26 devnull p = seprint(p, e, "%s(", dhcpmsgname[rp->dhcptype]);
1562 87a52e04 2005-12-26 devnull p = seprint(p, e, "%d(", rp->dhcptype);
1563 87a52e04 2005-12-26 devnull p = seprint(p, e, "%I->%I) xid(%ux)flag(%ux)", rp->up->raddr, rp->up->laddr,
1564 87a52e04 2005-12-26 devnull nhgetl(rp->bp->xid), nhgets(rp->bp->flags));
1565 87a52e04 2005-12-26 devnull if(rp->bp->htype == 1)
1566 87a52e04 2005-12-26 devnull p = seprint(p, e, "ea(%E)", rp->bp->chaddr);
1567 87a52e04 2005-12-26 devnull if(validip(rp->ciaddr))
1568 87a52e04 2005-12-26 devnull p = seprint(p, e, "ci(%I)", rp->ciaddr);
1569 87a52e04 2005-12-26 devnull if(validip(rp->giaddr))
1570 87a52e04 2005-12-26 devnull p = seprint(p, e, "gi(%I)", rp->giaddr);
1571 87a52e04 2005-12-26 devnull if(validip(rp->ip))
1572 87a52e04 2005-12-26 devnull p = seprint(p, e, "ip(%I)", rp->ip);
1573 87a52e04 2005-12-26 devnull if(rp->id != nil)
1574 87a52e04 2005-12-26 devnull p = seprint(p, e, "id(%s)", rp->id);
1575 87a52e04 2005-12-26 devnull if(rp->leasetime)
1576 87a52e04 2005-12-26 devnull p = seprint(p, e, "leas(%d)", rp->leasetime);
1577 87a52e04 2005-12-26 devnull if(validip(rp->server))
1578 87a52e04 2005-12-26 devnull p = seprint(p, e, "sid(%I)", rp->server);
1579 87a52e04 2005-12-26 devnull p = seprint(p, e, "need(");
1580 87a52e04 2005-12-26 devnull for(i = 0; i < sizeof(rp->requested); i++)
1581 87a52e04 2005-12-26 devnull if(rp->requested[i] != 0)
1582 87a52e04 2005-12-26 devnull p = seprint(p, e, "%s ", optname[rp->requested[i]]);
1583 87a52e04 2005-12-26 devnull p = seprint(p, e, ")");
1585 87a52e04 2005-12-26 devnull USED(p);
1586 87a52e04 2005-12-26 devnull syslog(0, blog, "%s", buf);
1590 87a52e04 2005-12-26 devnull logdhcpout(Req *rp, char *type)
1592 87a52e04 2005-12-26 devnull syslog(0, blog, "%s(%I->%I)id(%s)ci(%V)gi(%V)yi(%V)si(%V) %s",
1593 87a52e04 2005-12-26 devnull type, rp->up->laddr, rp->up->raddr, rp->id,
1594 87a52e04 2005-12-26 devnull rp->bp->ciaddr, rp->bp->giaddr, rp->bp->yiaddr, rp->bp->siaddr, optbuf);
1598 87a52e04 2005-12-26 devnull * if we get behind, it's useless to try answering since the sender
1599 87a52e04 2005-12-26 devnull * will probably have retransmitted with a differnt sequence number.
1600 87a52e04 2005-12-26 devnull * So dump all the last message in the queue.
1602 87a52e04 2005-12-26 devnull void ding(void *x, char *msg)
1604 87a52e04 2005-12-26 devnull USED(x);
1606 87a52e04 2005-12-26 devnull if(strstr(msg, "alarm"))
1607 87a52e04 2005-12-26 devnull noted(NCONT);
1609 87a52e04 2005-12-26 devnull noted(NDFLT);
1613 87a52e04 2005-12-26 devnull readlast(int fd, Udphdr *hdr, uchar *buf, int len)
1615 87a52e04 2005-12-26 devnull int lastn, n;
1617 87a52e04 2005-12-26 devnull notify(ding);
1619 87a52e04 2005-12-26 devnull lastn = 0;
1620 87a52e04 2005-12-26 devnull for(;;){
1621 87a52e04 2005-12-26 devnull alarm(20);
1622 87a52e04 2005-12-26 devnull n = udpread(fd, hdr, buf, len);
1623 87a52e04 2005-12-26 devnull alarm(0);
1624 87a52e04 2005-12-26 devnull if(n < 0){
1625 87a52e04 2005-12-26 devnull if(lastn > 0)
1626 87a52e04 2005-12-26 devnull return lastn;
1629 87a52e04 2005-12-26 devnull lastn = n;
1631 87a52e04 2005-12-26 devnull return udpread(fd, hdr, buf, len);
