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