18 Maxhost= 64, /* maximum host name size */
19 Maxservice= 64, /* maximum service name size */
20 Maxactive= 200, /* maximum number of active slave procs */
26 typedef struct Mfile Mfile;
27 typedef struct Mlist Mlist;
28 typedef struct Network Network;
29 typedef struct Flushreq Flushreq;
30 typedef struct Job Job;
32 int vers; /* incremented each clone/attach */
36 int busy; /* fid in use */
37 int ref; /* cleanup when drops to zero */
52 * result of the last lookup
84 jmp_buf masterjmp; /* return through here after a slave process has been created */
85 int *isslave; /* *isslave non-zero means this is a slave process */
86 long active; /* number of active slaves */
93 void rattach(Job*, Mfile*);
94 char* rwalk(Job*, Mfile*);
95 void ropen(Job*, Mfile*);
96 void rcreate(Job*, Mfile*);
97 void rread(Job*, Mfile*);
98 void rwrite(Job*, Mfile*);
99 void rclunk(Job*, Mfile*);
100 void rremove(Job*, Mfile*);
101 void rstat(Job*, Mfile*);
102 void rwstat(Job*, Mfile*);
104 void sendmsg(Job*, char*);
106 void mountinit(char*, char*);
111 char *genquery(Mfile*, char*);
112 char* ipinfoquery(Mfile*, char**, int);
113 int needproto(Network*, Ndbtuple*);
116 void readipinterfaces(void);
118 char* estrdup(char*);
121 void setext(char*, int, char*);
122 void cleanmf(Mfile*);
124 QLock dblock; /* mutex on database operations */
125 QLock netlock; /* mutex for netinit() */
127 char *logfile = "cs";
130 char netndb[Maxpath];
133 * Network specific translators
135 Ndbtuple* iplookup(Network*, char*, char*);
136 char* iptrans(Ndbtuple*, Network*, char*, char*, int);
137 Ndbtuple* telcolookup(Network*, char*, char*);
138 char* telcotrans(Ndbtuple*, Network*, char*, char*, int);
140 Ndbtuple* dnsiplookup(char*, Ndbs*, int);
141 Ndbtuple* myipinfo(Ndb *db, char **list, int n);
146 Ndbtuple *(*lookup)(Network*, char*, char*);
147 char *(*trans)(Ndbtuple*, Network*, char*, char*, int);
149 char considered; /* flag: ignored for "net!"? */
150 char fasttimeout; /* flag. was for IL */
151 char ipvers; /* flag: V4, V6 */
164 * net doesn't apply to (r)udp, icmp(v6), or telco (for speed).
166 Network network[] = {
167 { "il", iplookup, iptrans, 0, 1, V4, },
168 { "tcp", iplookup, iptrans, 0, 0, V4|V6, },
169 { "il", iplookup, iptrans, 0, 0, V4, },
170 { "udp", iplookup, iptrans, 1, 0, V4|V6, },
171 { "icmp", iplookup, iptrans, 1, 0, V4, },
172 { "icmpv6", iplookup, iptrans, 1, 0, V6, },
173 { "rudp", iplookup, iptrans, 1, 0, V4, },
174 { "ssh", iplookup, iptrans, 1, 0, V4|V6, },
175 { "telco", telcolookup, telcotrans, 1, 0, 0, },
183 int lookipvers = V4|V6;
187 Network *netlist; /* networks ordered by preference */
191 nstrcpy(char *to, char *from, int len)
193 strncpy(to, from, len);
200 fprint(2, "usage: %s [-46dn] [-f ndb-file] [-x netmtpt]\n", argv0);
205 main(int argc, char *argv[])
208 char ext[Maxpath], servefile[Maxpath];
211 setnetmtpt(mntpt, sizeof(mntpt), nil);
224 dbfile = EARGF(usage());
230 setnetmtpt(mntpt, sizeof(mntpt), EARGF(usage()));
231 setext(ext, sizeof(ext), mntpt);
237 snprint(netndb, sizeof(netndb), "%s/ndb", mntpt);
239 fmtinstall('E', eipfmt);
240 fmtinstall('I', eipfmt);
241 fmtinstall('M', eipfmt);
242 fmtinstall('F', fcallfmt);
248 snprint(servefile, sizeof(servefile), "#s/cs%s", ext);
249 unmount(servefile, mntpt);
252 rfork(RFREND|RFNOTEG);
253 csuser = estrdup(getuser());
254 mountinit(servefile, mntpt);
261 * if a mount point is specified, set the cs extention to be the mount point
262 * with '_'s replacing '/'s
265 setext(char *ext, int n, char *p)
270 for(i = 0; i < n; i++){
282 mountinit(char *service, char *mntpt)
289 error("pipe failed");
294 f = create(service, OWRITE|ORCLOSE, 0666);
297 snprint(buf, sizeof(buf), "%d", p[1]);
298 if(write(f, buf, strlen(buf)) != strlen(buf))
299 error("write /srv/cs");
301 switch(rfork(RFFDG|RFPROC|RFNAMEG)){
304 procsetname("%s", mntpt);
307 error("fork failed");
310 * put ourselves into the file system
313 if(mount(p[1], -1, mntpt, MAFTER, "") < 0)
314 error("mount failed");
317 mfd[0] = mfd[1] = p[0];
323 db = ndbopen(dbfile);
325 error("can't open network database");
327 for(netdb = db; netdb != nil; netdb = netdb->next)
328 if(strcmp(netdb->file, netndb) == 0)
331 netdb = ndbopen(netndb);
334 db = ndbcat(netdb, db);
345 for(f = mlist; f != nil; f = f->next)
346 if(f->mf.busy && f->mf.fid == fid)
348 else if(ff == nil && !f->mf.busy && !f->mf.ref)
351 ff = emalloc(sizeof *f);
356 memset(mf, 0, sizeof *mf);
366 job = emalloc(sizeof *job);
370 job->request.tag = -1;
381 for(l = &joblist; *l != nil; l = &(*l)->next){
397 for(job = joblist; job != nil; job = job->next){
398 if(job->request.tag == tag && job->request.type != Tflush){
412 uchar mdata[IOHDRSZ + Maxfdata];
416 * if we ask dns to fulfill requests,
417 * a slave process is created to wait for replies. The
418 * master process returns immediately via a longjmp
419 * through 'masterjmp'.
421 * *isslave is a pointer into the call stack to a variable
422 * that tells whether or not the current process is a slave.
424 slaveflag = 0; /* init slave variable */
425 isslave = &slaveflag;
429 n = read9pmsg(mfd[0], mdata, sizeof mdata);
435 if(convM2S(mdata, n, &job->request) != n){
436 syslog(1, logfile, "format error %ux %ux %ux %ux %ux",
437 mdata[0], mdata[1], mdata[2], mdata[3], mdata[4]);
442 mf = newfid(job->request.fid);
444 syslog(0, logfile, "%F", &job->request);
446 switch(job->request.type){
448 syslog(1, logfile, "unknown request type %d", job->request.type);
495 * slave processes die after replying
499 syslog(0, logfile, "slave death %d", getpid());
509 if(job->request.msize > IOHDRSZ + Maxfdata)
510 job->reply.msize = IOHDRSZ + Maxfdata;
512 job->reply.msize = job->request.msize;
513 if(strncmp(job->request.version, "9P2000", 6) != 0)
514 sendmsg(job, "unknown 9P version");
516 job->reply.version = "9P2000";
524 sendmsg(job, "cs: authentication not required");
528 * don't flush till all the slaves are done
533 flushjob(job->request.oldtag);
538 rattach(Job *job, Mfile *mf)
542 mf->user = estrdup(job->request.uname);
544 mf->qid.vers = vers++;
545 mf->qid.type = QTDIR;
547 job->reply.qid = mf->qid;
553 rwalk(Job *job, Mfile *mf)
564 elems = job->request.wname;
565 nelems = job->request.nwname;
566 job->reply.nwqid = 0;
568 if(job->request.newfid != job->request.fid){
570 nmf = newfid(job->request.newfid);
573 err = "clone to used channel";
577 nmf->user = estrdup(mf->user);
578 nmf->fid = job->request.newfid;
579 nmf->qid.vers = vers++;
582 /* else nmf will be nil */
587 for(i=0; i<nelems && i<MAXWELEM; i++){
588 if((qid.type & QTDIR) == 0){
589 err = "not a directory";
592 if(strcmp(elems[i], "..") == 0 || strcmp(elems[i], ".") == 0){
596 job->reply.wqid[i] = qid;
600 if(strcmp(elems[i], "cs") == 0){
605 err = "file does not exist";
611 if(nmf != nil && (err!=nil || job->reply.nwqid<nelems)){
625 ropen(Job *job, Mfile *mf)
631 mode = job->request.mode;
632 if(mf->qid.type & QTDIR){
634 err = "permission denied";
636 job->reply.qid = mf->qid;
637 job->reply.iounit = 0;
642 rcreate(Job *job, Mfile *mf)
645 sendmsg(job, "creation permission denied");
649 rread(Job *job, Mfile *mf)
652 long off, toff, clock;
659 off = job->request.offset;
660 cnt = job->request.count;
663 if(mf->qid.type & QTDIR){
666 memset(&dir, 0, sizeof dir);
668 dir.qid.type = QTFILE;
676 dir.atime = clock; /* wrong */
677 dir.mtime = clock; /* wrong */
678 n = convD2M(&dir, buf, sizeof buf);
680 job->reply.data = (char*)buf;
685 /* look for an answer at the right offset */
687 for(i = 0; mf->reply[i] != nil && i < mf->nreply; i++){
694 break; /* got something to return */
696 /* try looking up more answers */
697 if(lookup(mf) == 0 || job->flushed){
704 /* give back a single reply (or part of one) */
705 job->reply.data = mf->reply[i] + (off - toff);
706 if(cnt > toff - off + n)
712 job->reply.count = n;
715 if(--mf->ref == 0 && mf->busy == 0)
740 for(i = 0; i < mf->nreply; i++){
746 mf->nextnet = netlist;
750 rwrite(Job *job, Mfile *mf)
758 cnt = job->request.count;
759 if(mf->qid.type & QTDIR){
760 err = "can't write directory";
763 if(cnt >= Maxrequest){
764 err = "request too long";
767 job->request.data[cnt] = 0;
769 if(strcmp(mf->user, "none") == 0 || strcmp(mf->user, csuser) != 0)
770 goto query; /* skip special commands if not owner */
775 if(strncmp(job->request.data, "debug", 5)==0){
777 syslog(1, logfile, "debug %d", debug);
782 * toggle ipv4 lookups
784 if(strncmp(job->request.data, "ipv4", 4)==0){
786 syslog(1, logfile, "ipv4lookups %d", (lookipvers & V4) != 0);
791 * toggle ipv6 lookups
793 if(strncmp(job->request.data, "ipv6", 4)==0){
795 syslog(1, logfile, "ipv6lookups %d", (lookipvers & V6) != 0);
800 * add networks to the default list
802 if(strncmp(job->request.data, "add ", 4)==0){
803 if(job->request.data[cnt-1] == '\n')
804 job->request.data[cnt-1] = 0;
805 netadd(job->request.data+4);
813 if(strncmp(job->request.data, "refresh", 7)==0){
820 err = "query already in progress";
825 /* start transaction with a clean slate */
829 * look for a general query
831 if(*job->request.data == '!'){
832 err = genquery(mf, job->request.data+1);
837 syslog(0, logfile, "write %s", job->request.data);
841 n = getfields(job->request.data, field, 4, 1, "!");
844 mf->net = estrdup("net");
845 mf->host = estrdup(field[0]);
848 mf->rem = estrdup(field[3]);
851 mf->serv = estrdup(field[2]);
854 mf->host = estrdup(field[1]);
855 mf->net = estrdup(field[0]);
860 * do the first net worth of lookup
863 rerrstr(curerr, sizeof curerr);
868 if(--mf->ref == 0 && mf->busy == 0)
872 job->reply.count = cnt;
877 rclunk(Job *job, Mfile *mf)
889 rremove(Job *job, Mfile *mf)
892 sendmsg(job, "remove permission denied");
896 rstat(Job *job, Mfile *mf)
899 uchar buf[IOHDRSZ+Maxfdata];
901 memset(&dir, 0, sizeof dir);
902 if(mf->qid.type & QTDIR){
904 dir.mode = DMDIR|0555;
914 dir.atime = dir.mtime = time(0);
915 job->reply.nstat = convD2M(&dir, buf, sizeof buf);
916 job->reply.stat = buf;
921 rwstat(Job *job, Mfile *mf)
924 sendmsg(job, "wstat permission denied");
928 sendmsg(Job *job, char *err)
931 uchar mdata[IOHDRSZ + Maxfdata];
935 job->reply.type = Rerror;
936 snprint(ename, sizeof(ename), "cs: %s", err);
937 job->reply.ename = ename;
939 job->reply.type = job->request.type+1;
941 job->reply.tag = job->request.tag;
942 n = convS2M(&job->reply, mdata, sizeof mdata);
944 syslog(1, logfile, "sendmsg convS2M of %F returns 0", &job->reply);
948 if(job->flushed == 0)
949 if(write(mfd[1], mdata, n)!=n)
950 error("mount write");
953 syslog(0, logfile, "%F %d", &job->reply, n);
959 syslog(1, logfile, "%s: %r", s);
963 static uchar loopbacknet[IPaddrlen] = {
969 static uchar loopbackmask[IPaddrlen] = {
970 0xff, 0xff, 0xff, 0xff,
971 0xff, 0xff, 0xff, 0xff,
972 0xff, 0xff, 0xff, 0xff,
975 static uchar loopback6[IPaddrlen] = {
983 readipinterfaces(void)
985 uchar mynet[IPaddrlen];
992 ipifcs = readipifc(mntpt, ipifcs, -1);
993 for(ifc = ipifcs; ifc != nil; ifc = ifc->next){
994 for(lifc = ifc->lifc; lifc != nil; lifc = lifc->next){
995 if(ipcmp(lifc->ip, IPnoaddr) == 0)
999 maskip(lifc->ip, loopbackmask, mynet);
1000 if(ipcmp(mynet, loopbacknet) == 0)
1005 if(ISIPV6LINKLOCAL(lifc->ip))
1007 if(ipcmp(lifc->ip, loopback6) == 0)
1013 qunlock(&ipifclock);
1019 * get the system name
1024 char eaddr[16], buf[Maxpath];
1032 if(mysysname != nil)
1036 * environment has priority.
1038 * on the sgi power the default system name
1039 * is the ip address. ignore that.
1042 p = getenv("sysname");
1043 if(p != nil && *p != 0){
1045 if(strcmp(attr, "ip") != 0) {
1052 /* try configured interfaces */
1054 t = s.t = myipinfo(db, &attr, 1);
1058 /* try ethernet interfaces */
1061 f = open(mntpt, OREAD);
1063 n = dirreadall(f, &d);
1066 for(f = 0; f < n; f++){
1067 if((d[f].mode & DMDIR) == 0 || strncmp(d[f].name, "ether", 5) != 0)
1069 snprint(buf, sizeof buf, "%s/%s", mntpt, d[f].name);
1070 if(myetheraddr(addr, buf) >= 0){
1071 snprint(eaddr, sizeof(eaddr), "%E", addr);
1072 free(ndbgetvalue(db, &s, "ether", eaddr, "sys", &t));
1081 /* nothing else worked, use ip address */
1083 t = s.t = myipinfo(db, &attr, 1);
1088 /* found in database */
1089 if((tt = ndbfindattr(t, s.t, "sys")) != nil)
1090 mysysname = estrdup(tt->val);
1091 else if((tt = ndbfindattr(t, s.t, "ip")) != nil)
1092 mysysname = estrdup(tt->val);
1095 if(mysysname == nil)
1099 /* set /dev/sysname if we now know it */
1100 f = open("/dev/sysname", OWRITE);
1102 write(f, mysysname, strlen(mysysname));
1108 * Set up a list of default networks by looking for
1112 netinit(int background)
1114 char clone[Maxpath];
1118 if(rfork(RFPROC|RFNOTEG|RFMEM|RFNOWAIT) != 0)
1123 /* add the mounted networks to the default list */
1124 for(np = network; np->net != nil; np++){
1127 snprint(clone, sizeof(clone), "%s/%s/clone", mntpt, np->net);
1128 if(access(clone, AEXIST) < 0)
1139 /* find out what our ip addresses are */
1142 /* set the system name if we need to, these days ip is all we have */
1146 syslog(0, logfile, "mysysname %s", mysysname?mysysname:"???");
1155 * add networks to the standard list
1164 n = getfields(p, field, 12, 1, " ");
1165 for(i = 0; i < n; i++){
1166 for(np = network; np->net != nil; np++){
1167 if(strcmp(field[i], np->net) != 0)
1183 lookforproto(Ndbtuple *t, char *proto)
1185 for(; t != nil; t = t->entry)
1186 if(strcmp(t->attr, "proto") == 0 && strcmp(t->val, proto) == 0)
1192 * lookup a request. the network "net" means we should pick the
1193 * best network to get there.
1201 char reply[Maxreply];
1202 int i, rv, fasttimeout;
1204 /* open up the standard db files */
1208 error("can't open mf->network database\n");
1211 return 0; /* must have been a genquery */
1214 if(strcmp(mf->net, "net") == 0){
1216 * go through set of default nets
1218 for(np = mf->nextnet; np != nil && rv == 0; np = np->next){
1219 nt = (*np->lookup)(np, mf->host, mf->serv);
1222 fasttimeout = np->fasttimeout && !lookforproto(nt, np->net);
1223 for(t = nt; mf->nreply < Nreply && t != nil; t = t->entry){
1224 cp = (*np->trans)(t, np, mf->serv, mf->rem, fasttimeout);
1226 /* avoid duplicates */
1227 for(i = 0; i < mf->nreply; i++)
1228 if(strcmp(mf->reply[i], cp) == 0)
1230 if(i == mf->nreply){
1231 /* save the reply */
1232 mf->replylen[mf->nreply] = strlen(cp);
1233 mf->reply[mf->nreply++] = cp;
1246 * if not /net, we only get one lookup
1252 * look for a specific network
1254 for(np = network; np->net != nil; np++){
1257 if(strcmp(np->net, mf->net) == 0)
1265 nt = (*np->lookup)(np, mf->host, mf->serv);
1266 for(t = nt; mf->nreply < Nreply && t != nil; t = t->entry){
1267 cp = (*np->trans)(t, np, mf->serv, mf->rem, 0);
1269 mf->replylen[mf->nreply] = strlen(cp);
1270 mf->reply[mf->nreply++] = cp;
1278 * not a known network, don't translate host or service
1281 snprint(reply, sizeof(reply), "%s/%s/clone %s!%s",
1282 mntpt, mf->net, mf->host, mf->serv);
1284 snprint(reply, sizeof(reply), "%s/%s/clone %s",
1285 mntpt, mf->net, mf->host);
1286 mf->reply[0] = estrdup(reply);
1287 mf->replylen[0] = strlen(reply);
1294 * translate an ip service name into a port number. If it's a numeric port
1295 * number, look for restricted access.
1297 * the service '*' needs no translation.
1300 ipserv(Network *np, char *name, char *buf, int blen)
1308 /* '*' means any service */
1309 if(strcmp(name, "*") == 0){
1310 nstrcpy(buf, name, blen);
1314 /* see if it's numeric or symbolic */
1315 for(p = name; *p; p++){
1318 else if(isalpha(*p) || *p == '-' || *p == '$')
1326 p = ndbgetvalue(db, &s, np->net, name, "port", &t);
1330 /* look up only for tcp ports < 1024 to get the restricted
1333 if(atoi(name) < 1024 && strcmp(np->net, "tcp") == 0)
1334 p = ndbgetvalue(db, &s, "port", name, "port", &t);
1340 for(nt = t; nt != nil; nt = nt->entry)
1341 if(strcmp(nt->attr, "restricted") == 0)
1345 snprint(buf, blen, "%s%s", p, restr ? "!r" : "");
1352 myipinfo(Ndb *db, char **list, int n)
1361 for(ifc = ipifcs; ifc != nil; ifc = ifc->next){
1362 for(lifc = ifc->lifc; lifc != nil; lifc = lifc->next){
1363 snprint(ip, sizeof(ip), "%I", lifc->ip);
1364 nt = ndbipinfo(db, "ip", ip, list, n);
1365 t = ndbconcatenate(t, nt);
1368 qunlock(&ipifclock);
1374 * reorder according to our interfaces
1377 ipreorder(Ndbtuple *t)
1380 uchar ip[IPaddrlen];
1381 uchar net[IPaddrlen];
1382 uchar tnet[IPaddrlen];
1390 for(ifc = ipifcs; ifc != nil; ifc = ifc->next){
1391 for(lifc = ifc->lifc; lifc != nil; lifc = lifc->next){
1392 maskip(lifc->ip, lifc->mask, net);
1393 for(nt = t; nt != nil; nt = nt->entry){
1394 if(strcmp(nt->attr, "ip") != 0)
1396 if(parseip(ip, nt->val) == -1)
1398 maskip(ip, lifc->mask, tnet);
1399 if(memcmp(net, tnet, IPaddrlen) == 0){
1400 qunlock(&ipifclock);
1401 return ndbreorder(t, nt);
1406 qunlock(&ipifclock);
1412 ndbline(Ndbtuple *t)
1416 for(nt = t; nt != nil; nt = nt->entry){
1417 if(nt->entry == nil)
1420 nt->line = nt->entry;
1426 * lookup an ip destination
1429 iplookuphost(Network *np, char *host)
1431 char *attr, *dnsname;
1436 * turn '[ip address]' into just 'ip address'
1439 char tmp[Maxhost], *x;
1441 nstrcpy(tmp, host, sizeof tmp);
1443 if((x = strchr(++host, ']')) != nil)
1447 /* for dial strings with no host */
1448 if(strcmp(host, "*") == 0)
1449 return ndbline(ndbnew("ip", "*"));
1452 * hack till we go v6 :: = 0.0.0.0
1454 if(strcmp("::", host) == 0)
1455 return ndbline(ndbnew("ip", "*"));
1458 * just accept addresses
1460 attr = ipattr(host);
1461 if(strcmp(attr, "ip") == 0)
1462 return ndbline(ndbnew("ip", host));
1465 * give the domain name server the first opportunity to
1466 * resolve domain names. if that fails try the database.
1469 if(strcmp(attr, "dom") == 0)
1470 t = dnsiplookup(host, &s, np->ipvers);
1472 for(nt = ndbsearch(db, &s, attr, host); nt != nil; nt = ndbsnext(&s, attr, host)){
1473 if(ndbfindattr(nt, s.t, "ip") == nil){
1477 t = ndbconcatenate(t, ndbreorder(nt, s.t));
1482 if(strcmp(attr, "dom") != 0){
1483 dnsname = ndbgetvalue(db, &s, attr, host, "dom", nil);
1485 t = dnsiplookup(dnsname, &s, np->ipvers);
1490 t = dnsiplookup(host, &s, np->ipvers);
1496 * reorder the tuple to have the matched line first and
1497 * save that in the request structure.
1499 return ndbreorder(t, s.t);
1504 iplookup(Network *np, char *host, char *serv)
1506 Ndbtuple *l, *t, *nt;
1507 char ts[Maxservice], *attr;
1510 * start with the service since it's the most likely to fail
1511 * and costs the least
1513 if(serv == nil || ipserv(np, serv, ts, sizeof ts) == nil){
1514 werrstr("can't translate service");
1519 * '$' means the rest of the name is an attribute that we
1520 * need to search for
1522 werrstr("can't translate address");
1526 l = myipinfo(db, &attr, 1);
1527 for(nt = l; nt != nil; nt = nt->entry){
1528 if(strcmp(nt->attr, attr) == 0)
1529 t = ndbconcatenate(t, iplookuphost(np, nt->val));
1533 t = iplookuphost(np, host);
1535 return ipreorder(t);
1540 * translate an ip address
1543 iptrans(Ndbtuple *t, Network *np, char *serv, char *rem, int fasttimeout)
1545 char ts[Maxservice];
1546 char reply[Maxreply];
1548 uchar ip[IPaddrlen];
1550 if(strcmp(t->attr, "ip") != 0)
1553 if(serv == nil || ipserv(np, serv, ts, sizeof ts) == nil){
1554 werrstr("can't translate service");
1559 snprint(x, sizeof(x), "!%s", rem);
1564 snprint(reply, sizeof(reply), "%s/%s/clone %s%s",
1565 mntpt, np->net, ts, x);
1567 if(parseip(ip, t->val) == -1)
1569 if((np->ipvers & confipvers & (isv4(ip) ? V4 : V6)) == 0)
1571 snprint(reply, sizeof(reply), "%s/%s/clone %I!%s%s%s",
1572 mntpt, np->net, ip, ts, x, fasttimeout? "!fasttimeout": "");
1575 return estrdup(reply);
1579 * lookup a telephone number
1582 telcolookup(Network *np, char *host, char *serv)
1589 werrstr("can't translate address");
1590 free(ndbgetvalue(db, &s, "sys", host, "telco", &t));
1592 return ndbline(ndbnew("telco", host));
1594 return ndbreorder(t, s.t);
1598 * translate a telephone address
1601 telcotrans(Ndbtuple *t, Network *np, char *serv, char *rem, int)
1603 char reply[Maxreply];
1606 if(strcmp(t->attr, "telco") != 0)
1610 snprint(x, sizeof(x), "!%s", rem);
1614 snprint(reply, sizeof(reply), "%s/%s/clone %s!%s%s", mntpt, np->net,
1617 snprint(reply, sizeof(reply), "%s/%s/clone %s%s", mntpt, np->net,
1619 return estrdup(reply);
1623 * create a slave process to handle a request to avoid one request blocking
1624 * another. parent returns to job loop.
1630 return; /* we're already a slave process */
1631 if(ainc(&active) >= Maxactive){
1635 switch(rfork(RFPROC|RFNOTEG|RFMEM|RFNOWAIT)){
1642 syslog(0, logfile, "slave %d", getpid());
1643 procsetname("%s", host);
1646 longjmp(masterjmp, 1);
1654 static QLock mountlock;
1663 snprint(buf, sizeof(buf), "%s/dns", mntpt);
1664 if(access(buf, AEXIST) == 0)
1666 if(strcmp(mntpt, "/net") == 0)
1667 snprint(buf, sizeof(buf), "/srv/dns");
1669 snprint(buf, sizeof(buf), "/srv/dns%s", mntpt);
1670 while((p = strchr(buf+8, '/')) != nil)
1673 if((fd = open(buf, ORDWR)) < 0){
1675 qunlock(&mountlock);
1678 if(mount(fd, -1, mntpt, MAFTER, "") < 0){
1684 qunlock(&mountlock);
1689 dnsip6lookup(char *mntpt, char *buf, Ndbtuple *t)
1693 t6 = dnsquery(mntpt, buf, "ipv6"); /* lookup AAAA dns RRs */
1697 /* convert ipv6 attr to ip */
1698 for (tt = t6; tt != nil; tt = tt->entry)
1699 if (strcmp(tt->attr, "ipv6") == 0)
1700 strcpy(tt->attr, "ip");
1702 /* append t6 list to t list */
1703 return ndbconcatenate(t, t6);
1707 * call the dns process and have it try to translate a name
1710 dnsiplookup(char *host, Ndbs *s, int ipvers)
1715 ipvers &= dnsipvers & lookipvers;
1717 werrstr("no ip address");
1724 werrstr("too much activity");
1733 if(strcmp(ipattr(host), "ip") == 0)
1734 t = dnsquery(mntpt, host, "ptr");
1738 t = dnsquery(mntpt, host, "ip");
1740 t = dnsip6lookup(mntpt, host, t);
1745 rerrstr(buf, sizeof buf);
1746 if(strstr(buf, "exist") != nil)
1747 werrstr("can't translate address: %s", buf);
1748 else if(strstr(buf, "dns failure") != nil)
1749 werrstr("temporary problem: %s", buf);
1757 qmatch(Ndbtuple *t, char **attr, char **val, int n)
1762 for(i = 1; i < n; i++){
1764 for(nt = t; nt != nil; nt = nt->entry)
1765 if(strcmp(attr[i], nt->attr) == 0)
1766 if(strcmp(val[i], "*") == 0
1767 || strcmp(val[i], nt->val) == 0){
1778 qreply(Mfile *mf, Ndbtuple *t)
1784 for(nt = t; mf->nreply < Nreply && nt != nil; nt = nt->entry){
1785 s_append(s, nt->attr);
1787 s_append(s, nt->val);
1789 if(nt->line != nt->entry){
1790 mf->replylen[mf->nreply] = s_len(s);
1791 mf->reply[mf->nreply++] = estrdup(s_to_c(s));
1805 * generic query lookup. The query is of one of the following
1808 * attr1=val1 attr2=val2 attr3=val3 ...
1810 * returns the matching tuple
1812 * ipinfo attr=val attr1 attr2 attr3 ...
1814 * is like ipinfo and returns the attr{1-n}
1815 * associated with the ip address.
1818 genquery(Mfile *mf, char *query)
1822 char *attr[Maxattr];
1827 n = getfields(query, attr, nelem(attr), 1, " ");
1831 if(strcmp(attr[0], "ipinfo") == 0)
1832 return ipinfoquery(mf, attr, n);
1835 for(i = 0; i < n; i++){
1836 p = strchr(attr[i], '=');
1843 /* give dns a chance */
1844 if((strcmp(attr[0], "dom") == 0 || strcmp(attr[0], "ip") == 0) && val[0]){
1845 t = dnsiplookup(val[0], &s, lookipvers);
1847 if(qmatch(t, attr, val, n)){
1856 /* first pair is always the key. It can't be a '*' */
1857 t = ndbsearch(db, &s, attr[0], val[0]);
1859 /* search is the and of all the pairs */
1861 if(qmatch(t, attr, val, n)){
1868 t = ndbsnext(&s, attr[0], val[0]);
1875 * resolve an ip address
1878 ipresolve(char *attr, char *host)
1880 Ndbtuple *t, *nt, **l;
1882 t = iplookup(&network[Ntcp], host, "*");
1883 for(l = &t; *l != nil; ){
1885 if(strcmp(nt->attr, "ip") != 0){
1891 nstrcpy(nt->attr, attr, sizeof(nt->attr));
1898 ipinfoquery(Mfile *mf, char **list, int n)
1901 uchar resolve[Maxattr];
1902 Ndbtuple *t, *nt, **l;
1911 /* get search attribute=value, or assume myip */
1913 if((val = strchr(attr, '=')) != nil){
1926 * don't let ndbipinfo resolve the addresses, we're
1930 for(i = 0; i < n; i++)
1931 if(*list[i] == '@'){ /* @attr=val ? */
1933 resolve[i] = 1; /* we'll resolve it */
1939 t = myipinfo(db, list, n);
1941 t = ndbipinfo(db, attr, val, list, n);
1947 for(l = &t; *l != nil;){
1950 /* already an address? */
1951 if(strcmp(ipattr(nt->val), "ip") == 0){
1956 /* user wants it resolved? */
1957 for(i = 0; i < n; i++)
1958 if(strcmp(list[i], nt->attr) == 0)
1960 if(i >= n || resolve[i] == 0){
1965 /* resolve address and replace entry */
1966 *l = ipresolve(nt->attr, nt->val);
1978 /* make it all one line */
1993 error("out of memory");
2007 error("out of memory");
2008 memmove(p, s, size);