ref: 75a8003a8afb22e8557da98ad5dae63efa365d5e
parent: 58a0db935ce609533d121a5158a3a9fc65d03f65
author: cinap_lenrek <[email protected]>
date: Sun Aug 14 19:10:19 EDT 2016
ndb/cs: don't lookup AAAA records for IL, make sure translated address is IPv4 for IL, consistent use of nil vs. 0 for pointers
--- a/sys/src/cmd/ndb/cs.c
+++ b/sys/src/cmd/ndb/cs.c
@@ -135,16 +135,16 @@
/*
* Network specific translators
*/
-Ndbtuple* iplookup(Network*, char*, char*, int);
+Ndbtuple* iplookup(Network*, char*, char*);
char* iptrans(Ndbtuple*, Network*, char*, char*, int);
-Ndbtuple* telcolookup(Network*, char*, char*, int);
+Ndbtuple* telcolookup(Network*, char*, char*);
char* telcotrans(Ndbtuple*, Network*, char*, char*, int);
-Ndbtuple* dnsiplookup(char*, Ndbs*);
+Ndbtuple* dnsiplookup(char*, Ndbs*, int);
struct Network
{char *net;
- Ndbtuple *(*lookup)(Network*, char*, char*, int);
+ Ndbtuple *(*lookup)(Network*, char*, char*);
char *(*trans)(Ndbtuple*, Network*, char*, char*, int);
int considered; /* flag: ignored for "net!"? */
int fasttimeouthack; /* flag. was for IL */
@@ -341,7 +341,7 @@
if(db == nil)
error("can't open network database");- for(netdb = db; netdb; netdb = netdb->next)
+ for(netdb = db; netdb != nil; netdb = netdb->next)
if(strcmp(netdb->file, netndb) == 0)
return;
@@ -358,13 +358,13 @@
Mlist *f, *ff;
Mfile *mf;
- ff = 0;
- for(f = mlist; f; f = f->next)
+ ff = nil;
+ for(f = mlist; f != nil; f = f->next)
if(f->mf.busy && f->mf.fid == fid)
return &f->mf;
- else if(!ff && !f->mf.busy && !f->mf.ref)
+ else if(ff == nil && !f->mf.busy && !f->mf.ref)
ff = f;
- if(ff == 0){+ if(ff == nil){ff = emalloc(sizeof *f);
ff->next = mlist;
mlist = ff;
@@ -395,7 +395,7 @@
Job **l;
qlock(&joblock);
- for(l = &joblist; *l; l = &(*l)->next){+ for(l = &joblist; *l != nil; l = &(*l)->next){ if((*l) == job){*l = job->next;
break;
@@ -411,7 +411,7 @@
Job *job;
qlock(&joblock);
- for(job = joblist; job; job = job->next){+ for(job = joblist; job != nil; job = job->next){ if(job->request.tag == tag && job->request.type != Tflush){job->flushed = 1;
break;
@@ -531,7 +531,7 @@
sendmsg(job, "unknown 9P version");
else{job->reply.version = "9P2000";
- sendmsg(job, 0);
+ sendmsg(job, nil);
}
}
@@ -548,7 +548,7 @@
rflush(Job *job)
{flushjob(job->request.oldtag);
- sendmsg(job, 0);
+ sendmsg(job, nil);
}
void
@@ -562,7 +562,7 @@
mf->qid.type = QTDIR;
mf->qid.path = 0LL;
job->reply.qid = mf->qid;
- sendmsg(job, 0);
+ sendmsg(job, nil);
}
@@ -576,7 +576,7 @@
Mfile *nmf;
Qid qid;
- err = 0;
+ err = nil;
nmf = nil;
elems = job->request.wname;
nelems = job->request.nwname;
@@ -628,7 +628,7 @@
if(nmf != nil && (err!=nil || job->reply.nwqid<nelems)){cleanmf(nmf);
free(nmf->user);
- nmf->user = 0;
+ nmf->user = nil;
nmf->busy = 0;
nmf->fid = 0;
}
@@ -644,7 +644,7 @@
int mode;
char *err;
- err = 0;
+ err = nil;
mode = job->request.mode;
if(mf->qid.type & QTDIR){if(mode)
@@ -672,7 +672,7 @@
char *err;
n = 0;
- err = 0;
+ err = nil;
off = job->request.offset;
cnt = job->request.count;
mf->ref++;
@@ -701,7 +701,7 @@
for(;;){/* look for an answer at the right offset */
toff = 0;
- for(i = 0; mf->reply[i] && i < mf->nreply; i++){+ for(i = 0; mf->reply[i] != nil && i < mf->nreply; i++){n = mf->replylen[i];
if(off < toff + n)
break;
@@ -771,7 +771,7 @@
char *field[4];
char curerr[64];
- err = 0;
+ err = nil;
cnt = job->request.count;
if(mf->qid.type & QTDIR){err = "can't write directory";
@@ -898,10 +898,10 @@
if(mf->ref == 0)
cleanmf(mf);
free(mf->user);
- mf->user = 0;
+ mf->user = nil;
mf->fid = 0;
mf->busy = 0;
- sendmsg(job, 0);
+ sendmsg(job, nil);
}
void
@@ -933,7 +933,7 @@
dir.atime = dir.mtime = time(0);
job->reply.nstat = convD2M(&dir, buf, sizeof buf);
job->reply.stat = buf;
- sendmsg(job, 0);
+ sendmsg(job, nil);
}
void
@@ -1023,7 +1023,7 @@
char buf[Maxpath];
/* use environment, ether addr, or ipaddr to get system name */
- if(mysysname == 0){+ if(mysysname == nil){/*
* environment has priority.
*
@@ -1032,7 +1032,7 @@
*
*/
p = getenv("sysname");- if(p && *p){+ if(p != nil && *p){attr = ipattr(p);
if(strcmp(attr, "ip") != 0)
mysysname = estrdup(p);
@@ -1043,7 +1043,7 @@
* figured out from DHCP. use that name if
* there is one.
*/
- if(mysysname == 0 && netdb != nil){+ if(mysysname == nil && netdb != nil){ndbreopen(netdb);
for(tt = t = ndbparse(netdb); t != nil; t = t->entry){ if(strcmp(t->attr, "sys") == 0){@@ -1055,7 +1055,7 @@
}
/* next network database, ip address, and ether address to find a name */
- if(mysysname == 0){+ if(mysysname == nil){t = nil;
if(isvalidip(ipa))
free(ndbgetvalue(db, &s, "ip", ipaddr, "sys", &t));
@@ -1090,12 +1090,12 @@
}
/* nothing else worked, use the ip address */
- if(mysysname == 0 && isvalidip(ipa))
+ if(mysysname == nil && isvalidip(ipa))
mysysname = estrdup(ipaddr);
/* set /dev/sysname if we now know it */
- if(mysysname){+ if(mysysname != nil){ f = open("/dev/sysname", OWRITE); if(f >= 0){write(f, mysysname, strlen(mysysname));
@@ -1127,18 +1127,18 @@
}
/* add the mounted networks to the default list */
- for(np = network; np->net; np++){+ for(np = network; np->net != nil; np++){if(np->considered)
continue;
snprint(clone, sizeof(clone), "%s/%s/clone", mntpt, np->net);
if(access(clone, AEXIST) < 0)
continue;
- if(netlist)
+ if(netlist != nil)
last->next = np;
else
netlist = np;
last = np;
- np->next = 0;
+ np->next = nil;
np->considered = 1;
}
@@ -1170,17 +1170,17 @@
n = getfields(p, field, 12, 1, " ");
for(i = 0; i < n; i++){- for(np = network; np->net; np++){+ for(np = network; np->net != nil; np++){if(strcmp(field[i], np->net) != 0)
continue;
if(np->considered)
break;
- if(netlist)
+ if(netlist != nil)
last->next = np;
else
netlist = np;
last = np;
- np->next = 0;
+ np->next = nil;
np->considered = 1;
}
}
@@ -1210,28 +1210,27 @@
int hack;
/* open up the standard db files */
- if(db == 0)
+ if(db == nil)
ndbinit();
- if(db == 0)
+ if(db == nil)
error("can't open mf->network database\n");- rv = 0;
-
if(mf->net == nil)
return 0; /* must have been a genquery */
+ rv = 0;
if(strcmp(mf->net, "net") == 0){/*
* go through set of default nets
*/
- for(np = mf->nextnet; np; np = np->next){- nt = (*np->lookup)(np, mf->host, mf->serv, 1);
+ for(np = mf->nextnet; np != nil && rv == 0; np = np->next){+ nt = (*np->lookup)(np, mf->host, mf->serv);
if(nt == nil)
continue;
hack = np->fasttimeouthack && !lookforproto(nt, np->net);
- for(t = nt; mf->nreply < Nreply && t; t = t->entry){+ for(t = nt; mf->nreply < Nreply && t != nil; t = t->entry){cp = (*np->trans)(t, np, mf->serv, mf->rem, hack);
- if(cp){+ if(cp != nil){/* avoid duplicates */
for(i = 0; i < mf->nreply; i++)
if(strcmp(mf->reply[i], cp) == 0)
@@ -1246,8 +1245,6 @@
}
}
ndbfree(nt);
- np = np->next;
- break;
}
mf->nextnet = np;
return rv;
@@ -1258,10 +1255,11 @@
*/
if(mf->nreply != 0)
return 0;
+
/*
* look for a specific network
*/
- for(np = netlist; np && np->net != nil; np++){+ for(np = network; np->net != nil; np++){if(np->fasttimeouthack)
continue;
if(strcmp(np->net, mf->net) == 0)
@@ -1268,14 +1266,14 @@
break;
}
- if(np && np->net != nil){+ if(np->net != nil){/*
* known network
*/
- nt = (*np->lookup)(np, mf->host, mf->serv, 1);
- for(t = nt; mf->nreply < Nreply && t; t = t->entry){+ nt = (*np->lookup)(np, mf->host, mf->serv);
+ for(t = nt; mf->nreply < Nreply && t != nil; t = t->entry){cp = (*np->trans)(t, np, mf->serv, mf->rem, 0);
- if(cp){+ if(cp != nil){mf->replylen[mf->nreply] = strlen(cp);
mf->reply[mf->nreply++] = cp;
rv++;
@@ -1287,7 +1285,7 @@
/*
* not a known network, don't translate host or service
*/
- if(mf->serv)
+ if(mf->serv != nil)
snprint(reply, sizeof(reply), "%s/%s/clone %s!%s",
mntpt, mf->net, mf->host, mf->serv);
else
@@ -1317,7 +1315,7 @@
Ndbs s;
/* '*' means any service */
- if(strcmp(name, "*")==0){+ if(strcmp(name, "*") == 0){nstrcpy(buf, name, blen);
return buf;
}
@@ -1330,7 +1328,7 @@
else if(isalpha(*p) || *p == '-' || *p == '$')
alpha = 1;
else
- return 0;
+ return nil;
}
t = nil;
p = nil;
@@ -1337,7 +1335,7 @@
if(alpha){p = ndbgetvalue(db, &s, np->net, name, "port", &t);
if(p == nil)
- return 0;
+ return nil;
} else {/* look up only for tcp ports < 1024 to get the restricted
* attribute
@@ -1349,7 +1347,7 @@
}
if(t){- for(nt = t; nt; nt = nt->entry)
+ for(nt = t; nt != nil; nt = nt->entry)
if(strcmp(nt->attr, "restricted") == 0)
restr = 1;
ndbfree(t);
@@ -1391,7 +1389,7 @@
* lookup (and translate) an ip destination
*/
Ndbtuple*
-iplookup(Network *np, char *host, char *serv, int nolookup)
+iplookup(Network *np, char *host, char *serv)
{char *attr, *dnsname;
Ndbtuple *t, *nt;
@@ -1403,17 +1401,16 @@
uchar tnet[IPaddrlen];
Ipifc *ifc;
Iplifc *lifc;
+ int v6;
- USED(nolookup);
-
/*
* start with the service since it's the most likely to fail
* and costs the least
*/
werrstr("can't translate address");- if(serv==0 || ipserv(np, serv, ts, sizeof ts) == 0){+ if(serv == nil || ipserv(np, serv, ts, sizeof ts) == nil){ werrstr("can't translate service");- return 0;
+ return nil;
}
/* for dial strings with no host */
@@ -1463,21 +1460,22 @@
*/
t = 0;
werrstr("can't translate address");+ v6 = strcmp(np->net, "il") != 0;
if(strcmp(attr, "dom") == 0)
- t = dnsiplookup(host, &s);
- if(t == 0)
+ t = dnsiplookup(host, &s, v6);
+ if(t == nil)
free(ndbgetvalue(db, &s, attr, host, "ip", &t));
- if(t == 0){+ if(t == nil){dnsname = ndbgetvalue(db, &s, attr, host, "dom", nil);
if(dnsname){- t = dnsiplookup(dnsname, &s);
+ t = dnsiplookup(dnsname, &s, v6);
free(dnsname);
}
}
- if(t == 0)
- t = dnsiplookup(host, &s);
- if(t == 0)
- return 0;
+ if(t == nil)
+ t = dnsiplookup(host, &s, v6);
+ if(t == nil)
+ return nil;
/*
* reorder the tuple to have the matched line first and
@@ -1510,6 +1508,13 @@
return t;
}
+static int
+isv4str(char *s)
+{+ uchar ip[IPaddrlen];
+ return parseip(ip, s) != -1 && isv4(ip);
+}
+
/*
* translate an ip address
*/
@@ -1521,11 +1526,11 @@
char x[Maxservice];
if(strcmp(t->attr, "ip") != 0)
- return 0;
+ return nil;
- if(serv == 0 || ipserv(np, serv, ts, sizeof ts) == 0){+ if(serv == nil || ipserv(np, serv, ts, sizeof ts) == nil){ werrstr("can't translate service");- return 0;
+ return nil;
}
if(rem != nil)
snprint(x, sizeof(x), "!%s", rem);
@@ -1535,9 +1540,14 @@
if(*t->val == '*')
snprint(reply, sizeof(reply), "%s/%s/clone %s%s",
mntpt, np->net, ts, x);
- else
+ else {+ /* il only supports ipv4 addresses */
+ if(strcmp(np->net, "il") == 0 && !isv4str(t->val))
+ return nil;
+
snprint(reply, sizeof(reply), "%s/%s/clone %s!%s%s%s",
mntpt, np->net, t->val, ts, x, hack? "!fasttimeout": "");
+ }
return estrdup(reply);
}
@@ -1546,16 +1556,16 @@
* lookup a telephone number
*/
Ndbtuple*
-telcolookup(Network *np, char *host, char *serv, int nolookup)
+telcolookup(Network *np, char *host, char *serv)
{Ndbtuple *t;
Ndbs s;
- USED(np, nolookup, serv);
+ USED(np, serv);
werrstr("can't translate address");free(ndbgetvalue(db, &s, "sys", host, "telco", &t));
- if(t == 0)
+ if(t == nil)
return ndbnew("telco", host);return reorder(t, s.t);
@@ -1571,13 +1581,13 @@
char x[Maxservice];
if(strcmp(t->attr, "telco") != 0)
- return 0;
+ return nil;
if(rem != nil)
snprint(x, sizeof(x), "!%s", rem);
else
*x = 0;
- if(serv)
+ if(serv != nil)
snprint(reply, sizeof(reply), "%s/%s/clone %s!%s%s", mntpt, np->net,
t->val, serv, x);
else
@@ -1605,10 +1615,10 @@
/* remove this line and everything after it from the entry */
for(nt = t; nt->entry != line; nt = nt->entry)
;
- nt->entry = 0;
+ nt->entry = nil;
/* make that the start of the entry */
- for(nt = line; nt->entry; nt = nt->entry)
+ for(nt = line; nt->entry != nil; nt = nt->entry)
;
nt->entry = t;
return line;
@@ -1671,7 +1681,7 @@
* call the dns process and have it try to translate a name
*/
Ndbtuple*
-dnsiplookup(char *host, Ndbs *s)
+dnsiplookup(char *host, Ndbs *s, int v6)
{char buf[Maxreply];
Ndbtuple *t;
@@ -1689,7 +1699,7 @@
else {t = dnsquery(mntpt, host, "ip");
/* special case: query ipv6 (AAAA dns RR) too */
- if (ipv6lookups)
+ if (v6 && ipv6lookups)
t = dnsip6lookup(mntpt, host, t);
}
s->t = t;
@@ -1696,9 +1706,9 @@
if(t == nil){rerrstr(buf, sizeof buf);
- if(strstr(buf, "exist"))
+ if(strstr(buf, "exist") != nil)
werrstr("can't translate address: %s", buf);- else if(strstr(buf, "dns failure"))
+ else if(strstr(buf, "dns failure") != nil)
werrstr("temporary problem: %s", buf);}
@@ -1714,7 +1724,7 @@
for(i = 1; i < n; i++){found = 0;
- for(nt = t; nt; nt = nt->entry)
+ for(nt = t; nt != nil; nt = nt->entry)
if(strcmp(attr[i], nt->attr) == 0)
if(strcmp(val[i], "*") == 0
|| strcmp(val[i], nt->val) == 0){@@ -1734,7 +1744,7 @@
String *s;
s = s_new();
- for(nt = t; mf->nreply < Nreply && nt; nt = nt->entry){+ for(nt = t; mf->nreply < Nreply && nt != nil; nt = nt->entry){s_append(s, nt->attr);
s_append(s, "=");
s_append(s, nt->val);
@@ -1787,7 +1797,7 @@
/* parse pairs */
for(i = 0; i < n; i++){p = strchr(attr[i], '=');
- if(p == 0)
+ if(p == nil)
return "bad query";
*p++ = 0;
val[i] = p;
@@ -1795,12 +1805,12 @@
/* give dns a chance */
if((strcmp(attr[0], "dom") == 0 || strcmp(attr[0], "ip") == 0) && val[0]){- t = dnsiplookup(val[0], &s);
- if(t){+ t = dnsiplookup(val[0], &s, 1);
+ if(t != nil){ if(qmatch(t, attr, val, n)){qreply(mf, t);
ndbfree(t);
- return 0;
+ return nil;
}
ndbfree(t);
}
@@ -1810,11 +1820,11 @@
t = ndbsearch(db, &s, attr[0], val[0]);
/* search is the and of all the pairs */
- while(t){+ while(t != nil){ if(qmatch(t, attr, val, n)){qreply(mf, t);
ndbfree(t);
- return 0;
+ return nil;
}
ndbfree(t);
@@ -1832,7 +1842,7 @@
{Ndbtuple *t, *nt, **l;
- t = iplookup(&network[Ntcp], host, "*", 0);
+ t = iplookup(&network[Ntcp], host, "*");
for(l = &t; *l != nil; ){nt = *l;
if(strcmp(nt->attr, "ip") != 0){