1 3880f020 2005-03-18 devnull #include <u.h>
  2 3880f020 2005-03-18 devnull #include <libc.h>
  3 3880f020 2005-03-18 devnull #include <auth.h>
  4 3880f020 2005-03-18 devnull #include <fcall.h>
  5 3880f020 2005-03-18 devnull #include <thread.h>
  6 3880f020 2005-03-18 devnull 
  7 5c84c448 2005-03-21 devnull int debug;
  8 5c84c448 2005-03-21 devnull char *aname = "";
  9 5c84c448 2005-03-21 devnull char *keypattern = "";
 10 5c84c448 2005-03-21 devnull int fd;
 11 5c84c448 2005-03-21 devnull int msize;
 12 5c84c448 2005-03-21 devnull int doauth;
 13 34e8254f 2005-07-27 devnull u32int afid = NOFID;
 14 5c84c448 2005-03-21 devnull extern char *post9parg;	/* clumsy hack */
 15 5c84c448 2005-03-21 devnull void xauth(void);
 16 5c84c448 2005-03-21 devnull AuthInfo* xauth_proxy(AuthGetkey *getkey, char *fmt, ...);
 17 5c84c448 2005-03-21 devnull 
 18 3880f020 2005-03-18 devnull void
 19 3880f020 2005-03-18 devnull usage(void)
 20 3880f020 2005-03-18 devnull {
 21 5c84c448 2005-03-21 devnull 	fprint(2, "usage: srv [-a] [-A aname] [-k keypattern] addr [srvname]\n");
 22 3880f020 2005-03-18 devnull 	threadexitsall("usage");
 23 3880f020 2005-03-18 devnull }
 24 3880f020 2005-03-18 devnull 
 25 3880f020 2005-03-18 devnull void
 26 3880f020 2005-03-18 devnull threadmain(int argc, char **argv)
 27 3880f020 2005-03-18 devnull {
 28 3880f020 2005-03-18 devnull 	char *addr, *service;
 29 5c84c448 2005-03-21 devnull 
 30 5c84c448 2005-03-21 devnull 	fmtinstall('F', fcallfmt);
 31 5c84c448 2005-03-21 devnull 	fmtinstall('M', dirmodefmt);
 32 3880f020 2005-03-18 devnull 	
 33 3880f020 2005-03-18 devnull 	ARGBEGIN{
 34 5c84c448 2005-03-21 devnull 	case 'D':
 35 5c84c448 2005-03-21 devnull 		debug = 1;
 36 5c84c448 2005-03-21 devnull 		break;
 37 5c84c448 2005-03-21 devnull 	case 'A':
 38 5c84c448 2005-03-21 devnull 		/* BUG: should be able to repeat this and establish multiple afids */
 39 5c84c448 2005-03-21 devnull 		aname = EARGF(usage());
 40 5c84c448 2005-03-21 devnull 		break;
 41 5c84c448 2005-03-21 devnull 	case 'a':
 42 5c84c448 2005-03-21 devnull 		doauth = 1;
 43 5c84c448 2005-03-21 devnull 		break;
 44 5c84c448 2005-03-21 devnull 	case 'k':
 45 5c84c448 2005-03-21 devnull 		keypattern = EARGF(usage());
 46 5c84c448 2005-03-21 devnull 		break;
 47 3880f020 2005-03-18 devnull 	default:
 48 3880f020 2005-03-18 devnull 		usage();
 49 3880f020 2005-03-18 devnull 	}ARGEND
 50 3880f020 2005-03-18 devnull 	
 51 3880f020 2005-03-18 devnull 	if(argc != 1 && argc != 2)
 52 3880f020 2005-03-18 devnull 		usage();
 53 3880f020 2005-03-18 devnull 
 54 3880f020 2005-03-18 devnull 	addr = netmkaddr(argv[0], "tcp", "9fs");
 55 3880f020 2005-03-18 devnull 	if((fd = dial(addr, nil, nil, nil)) < 0)
 56 3880f020 2005-03-18 devnull 		sysfatal("dial %s: %r", addr);
 57 5c84c448 2005-03-21 devnull 
 58 5c84c448 2005-03-21 devnull 	if(doauth)
 59 5c84c448 2005-03-21 devnull 		xauth();
 60 5c84c448 2005-03-21 devnull 
 61 3880f020 2005-03-18 devnull 	if(argc == 2)
 62 3880f020 2005-03-18 devnull 		service = argv[1];
 63 3880f020 2005-03-18 devnull 	else
 64 3880f020 2005-03-18 devnull 		service = argv[0];
 65 5c84c448 2005-03-21 devnull 
 66 c48193be 2006-02-04 devnull 	rfork(RFNOTEG);
 67 3880f020 2005-03-18 devnull 	if(post9pservice(fd, service) < 0)
 68 3880f020 2005-03-18 devnull 		sysfatal("post9pservice: %r");
 69 3880f020 2005-03-18 devnull 
 70 3880f020 2005-03-18 devnull 	threadexitsall(0);
 71 3880f020 2005-03-18 devnull }
 72 5c84c448 2005-03-21 devnull 
 73 5c84c448 2005-03-21 devnull void
 74 5c84c448 2005-03-21 devnull do9p(Fcall *tx, Fcall *rx)
 75 5c84c448 2005-03-21 devnull {
 76 5c84c448 2005-03-21 devnull 	static uchar buf[9000];
 77 5c84c448 2005-03-21 devnull 	static char ebuf[200];
 78 5c84c448 2005-03-21 devnull 	int n;
 79 5c84c448 2005-03-21 devnull 	
 80 5c84c448 2005-03-21 devnull 	n = convS2M(tx, buf, sizeof buf);
 81 5c84c448 2005-03-21 devnull 	if(n == BIT16SZ){
 82 5c84c448 2005-03-21 devnull 		werrstr("convS2M failed");
 83 5c84c448 2005-03-21 devnull 		goto err;
 84 5c84c448 2005-03-21 devnull 	}
 85 5c84c448 2005-03-21 devnull 	if(debug)
 86 5c84c448 2005-03-21 devnull 		fprint(2, "<- %F\n", tx);
 87 5c84c448 2005-03-21 devnull 	if(write(fd, buf, n) != n)
 88 5c84c448 2005-03-21 devnull 		goto err;
 89 5c84c448 2005-03-21 devnull 	if((n = read9pmsg(fd, buf, sizeof buf)) < 0)
 90 5c84c448 2005-03-21 devnull 		goto err;
 91 5c84c448 2005-03-21 devnull 	if(n == 0){
 92 5c84c448 2005-03-21 devnull 		werrstr("unexpected eof");
 93 5c84c448 2005-03-21 devnull 		goto err;
 94 5c84c448 2005-03-21 devnull 	}
 95 5c84c448 2005-03-21 devnull 	if(convM2S(buf, n, rx) != n){
 96 5c84c448 2005-03-21 devnull 		werrstr("convM2S failed");
 97 5c84c448 2005-03-21 devnull 		goto err;
 98 5c84c448 2005-03-21 devnull 	}
 99 5c84c448 2005-03-21 devnull 	if(debug)
100 5c84c448 2005-03-21 devnull 		fprint(2, "-> %F\n", rx);
101 5c84c448 2005-03-21 devnull 	if(rx->type != Rerror && rx->type != tx->type+1){
102 5c84c448 2005-03-21 devnull 		werrstr("unexpected type");
103 5c84c448 2005-03-21 devnull 		goto err;
104 5c84c448 2005-03-21 devnull 	}
105 5c84c448 2005-03-21 devnull 	if(rx->tag != tx->tag){
106 5c84c448 2005-03-21 devnull 		werrstr("unexpected tag");
107 5c84c448 2005-03-21 devnull 		goto err;
108 5c84c448 2005-03-21 devnull 	}
109 5c84c448 2005-03-21 devnull 	return;
110 5c84c448 2005-03-21 devnull 
111 5c84c448 2005-03-21 devnull err:
112 5c84c448 2005-03-21 devnull 	rerrstr(ebuf, sizeof ebuf);
113 5c84c448 2005-03-21 devnull 	rx->ename = ebuf;
114 5c84c448 2005-03-21 devnull 	rx->type = Rerror;
115 5c84c448 2005-03-21 devnull 	return;
116 5c84c448 2005-03-21 devnull }
117 5c84c448 2005-03-21 devnull 
118 5c84c448 2005-03-21 devnull void
119 5c84c448 2005-03-21 devnull xauth(void)
120 5c84c448 2005-03-21 devnull {
121 5c84c448 2005-03-21 devnull 	Fcall tx, rx;
122 5c84c448 2005-03-21 devnull 
123 5c84c448 2005-03-21 devnull 	afid = 0;
124 5c84c448 2005-03-21 devnull 	tx.type = Tversion;
125 5c84c448 2005-03-21 devnull 	tx.tag = NOTAG;
126 5c84c448 2005-03-21 devnull 	tx.version = "9P2000";
127 5c84c448 2005-03-21 devnull 	tx.msize = 8192;
128 5c84c448 2005-03-21 devnull 	do9p(&tx, &rx);
129 5c84c448 2005-03-21 devnull 	if(rx.type == Rerror)
130 5c84c448 2005-03-21 devnull 		sysfatal("Tversion: %s", rx.ename);
131 5c84c448 2005-03-21 devnull 	msize = rx.msize;
132 5c84c448 2005-03-21 devnull 	
133 5c84c448 2005-03-21 devnull 	tx.type = Tauth;
134 5c84c448 2005-03-21 devnull 	tx.tag = 1;
135 5c84c448 2005-03-21 devnull 	tx.afid = afid;
136 5c84c448 2005-03-21 devnull 	tx.uname = getuser();
137 5c84c448 2005-03-21 devnull 	tx.aname = aname;
138 5c84c448 2005-03-21 devnull 	do9p(&tx, &rx);
139 5c84c448 2005-03-21 devnull 	if(rx.type == Rerror){
140 5c84c448 2005-03-21 devnull 		fprint(2, "rx: %s\n", rx.ename);
141 5c84c448 2005-03-21 devnull 		afid = NOFID;
142 5c84c448 2005-03-21 devnull 		return;
143 5c84c448 2005-03-21 devnull 	}
144 5c84c448 2005-03-21 devnull 
145 78378021 2005-05-07 devnull 	if(xauth_proxy(auth_getkey, "proto=p9any role=client %s", keypattern) == nil)
146 5c84c448 2005-03-21 devnull 		sysfatal("authproxy: %r");
147 5c84c448 2005-03-21 devnull }
148 5c84c448 2005-03-21 devnull 
149 5c84c448 2005-03-21 devnull int
150 5c84c448 2005-03-21 devnull xread(void *buf, int n)
151 5c84c448 2005-03-21 devnull {
152 5c84c448 2005-03-21 devnull 	Fcall tx, rx;
153 5c84c448 2005-03-21 devnull 	
154 5c84c448 2005-03-21 devnull 	tx.type = Tread;
155 5c84c448 2005-03-21 devnull 	tx.tag = 1;
156 5c84c448 2005-03-21 devnull 	tx.fid = 0;	/* afid above */
157 5c84c448 2005-03-21 devnull 	tx.count = n;
158 5c84c448 2005-03-21 devnull 	tx.offset = 0;
159 5c84c448 2005-03-21 devnull 	do9p(&tx, &rx);
160 5c84c448 2005-03-21 devnull 	if(rx.type == Rerror){
161 5c84c448 2005-03-21 devnull 		werrstr("%s", rx.ename);
162 5c84c448 2005-03-21 devnull 		return -1;
163 5c84c448 2005-03-21 devnull 	}
164 5c84c448 2005-03-21 devnull 	
165 5c84c448 2005-03-21 devnull 	if(rx.count > n){
166 5c84c448 2005-03-21 devnull 		werrstr("too much data returned");
167 5c84c448 2005-03-21 devnull 		return -1;
168 5c84c448 2005-03-21 devnull 	}
169 5c84c448 2005-03-21 devnull 	memmove(buf, rx.data, rx.count);
170 5c84c448 2005-03-21 devnull 	return rx.count;
171 5c84c448 2005-03-21 devnull }
172 5c84c448 2005-03-21 devnull 
173 5c84c448 2005-03-21 devnull int
174 5c84c448 2005-03-21 devnull xwrite(void *buf, int n)
175 5c84c448 2005-03-21 devnull {
176 5c84c448 2005-03-21 devnull 	Fcall tx, rx;
177 5c84c448 2005-03-21 devnull 	
178 5c84c448 2005-03-21 devnull 	tx.type = Twrite;
179 5c84c448 2005-03-21 devnull 	tx.tag = 1;
180 5c84c448 2005-03-21 devnull 	tx.fid = 0;	/* afid above */
181 5c84c448 2005-03-21 devnull 	tx.data = buf;
182 5c84c448 2005-03-21 devnull 	tx.count = n;
183 5c84c448 2005-03-21 devnull 	tx.offset = 0;
184 5c84c448 2005-03-21 devnull 	do9p(&tx, &rx);
185 5c84c448 2005-03-21 devnull 	if(rx.type == Rerror){
186 5c84c448 2005-03-21 devnull 		werrstr("%s", rx.ename);
187 5c84c448 2005-03-21 devnull 		return -1;
188 5c84c448 2005-03-21 devnull 	}
189 5c84c448 2005-03-21 devnull 	return n;
190 5c84c448 2005-03-21 devnull }
191 5c84c448 2005-03-21 devnull 
192 5c84c448 2005-03-21 devnull 
193 5c84c448 2005-03-21 devnull /*
194 5c84c448 2005-03-21 devnull  * changed to add -A below
195 5c84c448 2005-03-21 devnull  */
196 5c84c448 2005-03-21 devnull #undef _exits
197 5c84c448 2005-03-21 devnull int
198 5c84c448 2005-03-21 devnull post9pservice(int fd, char *name)
199 5c84c448 2005-03-21 devnull {
200 5c84c448 2005-03-21 devnull 	int i;
201 5c84c448 2005-03-21 devnull 	char *ns, *s;
202 5c84c448 2005-03-21 devnull 	Waitmsg *w;
203 5c84c448 2005-03-21 devnull 
204 5c84c448 2005-03-21 devnull 	if((ns = getns()) == nil)
205 5c84c448 2005-03-21 devnull 		return -1;
206 5c84c448 2005-03-21 devnull 
207 5c84c448 2005-03-21 devnull 	s = smprint("unix!%s/%s", ns, name);
208 5c84c448 2005-03-21 devnull 	free(ns);
209 5c84c448 2005-03-21 devnull 	if(s == nil)
210 5c84c448 2005-03-21 devnull 		return -1;
211 5c84c448 2005-03-21 devnull 	switch(fork()){
212 5c84c448 2005-03-21 devnull 	case -1:
213 5c84c448 2005-03-21 devnull 		return -1;
214 5c84c448 2005-03-21 devnull 	case 0:
215 5c84c448 2005-03-21 devnull 		dup(fd, 0);
216 5c84c448 2005-03-21 devnull 		dup(fd, 1);
217 5c84c448 2005-03-21 devnull 		for(i=3; i<20; i++)
218 5c84c448 2005-03-21 devnull 			close(i);
219 5c84c448 2005-03-21 devnull 		if(doauth)
220 5c84c448 2005-03-21 devnull 			execlp("9pserve", "9pserve", "-u",
221 5c84c448 2005-03-21 devnull 				"-M",
222 5c84c448 2005-03-21 devnull 					smprint("%d", msize),
223 5c84c448 2005-03-21 devnull 				"-A",
224 5c84c448 2005-03-21 devnull 					aname,
225 5c84c448 2005-03-21 devnull 					smprint("%d", afid),
226 5c84c448 2005-03-21 devnull 				s, (char*)0);
227 5c84c448 2005-03-21 devnull 		else		
228 5c84c448 2005-03-21 devnull 			execlp("9pserve", "9pserve", "-u", s, (char*)0);
229 5c84c448 2005-03-21 devnull 		fprint(2, "exec 9pserve: %r\n");
230 5c84c448 2005-03-21 devnull 		_exits("exec");
231 5c84c448 2005-03-21 devnull 	default:
232 5c84c448 2005-03-21 devnull 		w = wait();
233 5c84c448 2005-03-21 devnull 		if(w == nil)
234 5c84c448 2005-03-21 devnull 			return -1;
235 5c84c448 2005-03-21 devnull 		close(fd);
236 5c84c448 2005-03-21 devnull 		free(s);
237 5c84c448 2005-03-21 devnull 		if(w->msg && w->msg[0]){
238 5c84c448 2005-03-21 devnull 			free(w);
239 5c84c448 2005-03-21 devnull 			werrstr("9pserve failed");
240 5c84c448 2005-03-21 devnull 			return -1;
241 5c84c448 2005-03-21 devnull 		}
242 5c84c448 2005-03-21 devnull 		free(w);
243 5c84c448 2005-03-21 devnull 		return 0;
244 5c84c448 2005-03-21 devnull 	}
245 5c84c448 2005-03-21 devnull }
246 5c84c448 2005-03-21 devnull 
247 5c84c448 2005-03-21 devnull enum { ARgiveup = 100 };
248 5c84c448 2005-03-21 devnull static int
249 5c84c448 2005-03-21 devnull dorpc(AuthRpc *rpc, char *verb, char *val, int len, AuthGetkey *getkey)
250 5c84c448 2005-03-21 devnull {
251 5c84c448 2005-03-21 devnull 	int ret;
252 5c84c448 2005-03-21 devnull 
253 5c84c448 2005-03-21 devnull 	for(;;){
254 5c84c448 2005-03-21 devnull 		if((ret = auth_rpc(rpc, verb, val, len)) != ARneedkey && ret != ARbadkey)
255 5c84c448 2005-03-21 devnull 			return ret;
256 5c84c448 2005-03-21 devnull 		if(getkey == nil)
257 5c84c448 2005-03-21 devnull 			return ARgiveup;	/* don't know how */
258 5c84c448 2005-03-21 devnull 		if((*getkey)(rpc->arg) < 0)
259 5c84c448 2005-03-21 devnull 			return ARgiveup;	/* user punted */
260 5c84c448 2005-03-21 devnull 	}
261 5c84c448 2005-03-21 devnull }
262 5c84c448 2005-03-21 devnull 
263 5c84c448 2005-03-21 devnull 
264 5c84c448 2005-03-21 devnull /*
265 5c84c448 2005-03-21 devnull  *  this just proxies what the factotum tells it to.
266 5c84c448 2005-03-21 devnull  */
267 5c84c448 2005-03-21 devnull AuthInfo*
268 5c84c448 2005-03-21 devnull xfauth_proxy(AuthRpc *rpc, AuthGetkey *getkey, char *params)
269 5c84c448 2005-03-21 devnull {
270 5c84c448 2005-03-21 devnull 	char *buf;
271 5c84c448 2005-03-21 devnull 	int m, n, ret;
272 5c84c448 2005-03-21 devnull 	AuthInfo *a;
273 5c84c448 2005-03-21 devnull 	char oerr[ERRMAX];
274 5c84c448 2005-03-21 devnull 
275 5c84c448 2005-03-21 devnull 	rerrstr(oerr, sizeof oerr);
276 5c84c448 2005-03-21 devnull 	werrstr("UNKNOWN AUTH ERROR");
277 5c84c448 2005-03-21 devnull 
278 5c84c448 2005-03-21 devnull 	if(dorpc(rpc, "start", params, strlen(params), getkey) != ARok){
279 5c84c448 2005-03-21 devnull 		werrstr("fauth_proxy start: %r");
280 5c84c448 2005-03-21 devnull 		return nil;
281 5c84c448 2005-03-21 devnull 	}
282 5c84c448 2005-03-21 devnull 
283 5c84c448 2005-03-21 devnull 	buf = malloc(AuthRpcMax);
284 5c84c448 2005-03-21 devnull 	if(buf == nil)
285 5c84c448 2005-03-21 devnull 		return nil;
286 5c84c448 2005-03-21 devnull 	for(;;){
287 5c84c448 2005-03-21 devnull 		switch(dorpc(rpc, "read", nil, 0, getkey)){
288 5c84c448 2005-03-21 devnull 		case ARdone:
289 5c84c448 2005-03-21 devnull 			free(buf);
290 5c84c448 2005-03-21 devnull 			a = auth_getinfo(rpc);
291 5c84c448 2005-03-21 devnull 			errstr(oerr, sizeof oerr);	/* no error, restore whatever was there */
292 5c84c448 2005-03-21 devnull 			return a;
293 5c84c448 2005-03-21 devnull 		case ARok:
294 5c84c448 2005-03-21 devnull 			if(xwrite(rpc->arg, rpc->narg) != rpc->narg){
295 5c84c448 2005-03-21 devnull 				werrstr("auth_proxy write fid: %r");
296 5c84c448 2005-03-21 devnull 				goto Error;
297 5c84c448 2005-03-21 devnull 			}
298 5c84c448 2005-03-21 devnull 			break;
299 5c84c448 2005-03-21 devnull 		case ARphase:
300 5c84c448 2005-03-21 devnull 			n = 0;
301 5c84c448 2005-03-21 devnull 			memset(buf, 0, AuthRpcMax);
302 5c84c448 2005-03-21 devnull 			while((ret = dorpc(rpc, "write", buf, n, getkey)) == ARtoosmall){
303 5c84c448 2005-03-21 devnull 				if(atoi(rpc->arg) > AuthRpcMax)
304 5c84c448 2005-03-21 devnull 					break;
305 5c84c448 2005-03-21 devnull 				m = xread(buf+n, atoi(rpc->arg)-n);
306 5c84c448 2005-03-21 devnull 				if(m <= 0){
307 5c84c448 2005-03-21 devnull 					if(m == 0)
308 5c84c448 2005-03-21 devnull 						werrstr("auth_proxy short read: %s", buf);
309 5c84c448 2005-03-21 devnull 					goto Error;
310 5c84c448 2005-03-21 devnull 				}
311 5c84c448 2005-03-21 devnull 				n += m;
312 5c84c448 2005-03-21 devnull 			}
313 5c84c448 2005-03-21 devnull 			if(ret != ARok){
314 5c84c448 2005-03-21 devnull 				werrstr("auth_proxy rpc write: %s: %r", buf);
315 5c84c448 2005-03-21 devnull 				goto Error;
316 5c84c448 2005-03-21 devnull 			}
317 5c84c448 2005-03-21 devnull 			break;
318 5c84c448 2005-03-21 devnull 		default:
319 5c84c448 2005-03-21 devnull 			werrstr("auth_proxy rpc: %r");
320 5c84c448 2005-03-21 devnull 			goto Error;
321 5c84c448 2005-03-21 devnull 		}
322 5c84c448 2005-03-21 devnull 	}
323 5c84c448 2005-03-21 devnull Error:
324 5c84c448 2005-03-21 devnull 	free(buf);
325 5c84c448 2005-03-21 devnull 	return nil;
326 5c84c448 2005-03-21 devnull }
327 5c84c448 2005-03-21 devnull 
328 5c84c448 2005-03-21 devnull AuthInfo*
329 5c84c448 2005-03-21 devnull xauth_proxy(AuthGetkey *getkey, char *fmt, ...)
330 5c84c448 2005-03-21 devnull {
331 5c84c448 2005-03-21 devnull 	char *p;
332 5c84c448 2005-03-21 devnull 	va_list arg;
333 5c84c448 2005-03-21 devnull 	AuthInfo *ai;
334 5c84c448 2005-03-21 devnull 	AuthRpc *rpc;
335 5c84c448 2005-03-21 devnull 
336 5c84c448 2005-03-21 devnull 	quotefmtinstall();	/* just in case */
337 5c84c448 2005-03-21 devnull 	va_start(arg, fmt);
338 5c84c448 2005-03-21 devnull 	p = vsmprint(fmt, arg);
339 5c84c448 2005-03-21 devnull 	va_end(arg);
340 5c84c448 2005-03-21 devnull 
341 5c84c448 2005-03-21 devnull 	rpc = auth_allocrpc();
342 5c84c448 2005-03-21 devnull 	if(rpc == nil){
343 5c84c448 2005-03-21 devnull 		free(p);
344 5c84c448 2005-03-21 devnull 		return nil;
345 5c84c448 2005-03-21 devnull 	}
346 5c84c448 2005-03-21 devnull 
347 5c84c448 2005-03-21 devnull 	ai = xfauth_proxy(rpc, getkey, p);
348 5c84c448 2005-03-21 devnull 	free(p);
349 5c84c448 2005-03-21 devnull 	auth_freerpc(rpc);
350 5c84c448 2005-03-21 devnull 	return ai;
351 5c84c448 2005-03-21 devnull }
352 5c84c448 2005-03-21 devnull