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

front
cinap_lenrek 2016-08-14 23:10:19 +02:00
parent 58a0db935c
commit 75a8003a8a
1 changed files with 102 additions and 92 deletions

View File

@ -135,16 +135,16 @@ char netndb[Maxpath];
/*
* 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 @@ ndbinit(void)
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 @@ newfid(int fid)
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 @@ freejob(Job *job)
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 @@ flushjob(int tag)
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 @@ rversion(Job *job)
sendmsg(job, "unknown 9P version");
else{
job->reply.version = "9P2000";
sendmsg(job, 0);
sendmsg(job, nil);
}
}
@ -548,7 +548,7 @@ void
rflush(Job *job)
{
flushjob(job->request.oldtag);
sendmsg(job, 0);
sendmsg(job, nil);
}
void
@ -562,7 +562,7 @@ rattach(Job *job, Mfile *mf)
mf->qid.type = QTDIR;
mf->qid.path = 0LL;
job->reply.qid = mf->qid;
sendmsg(job, 0);
sendmsg(job, nil);
}
@ -576,7 +576,7 @@ rwalk(Job *job, Mfile *mf)
Mfile *nmf;
Qid qid;
err = 0;
err = nil;
nmf = nil;
elems = job->request.wname;
nelems = job->request.nwname;
@ -628,7 +628,7 @@ rwalk(Job *job, Mfile *mf)
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 @@ ropen(Job *job, Mfile *mf)
int mode;
char *err;
err = 0;
err = nil;
mode = job->request.mode;
if(mf->qid.type & QTDIR){
if(mode)
@ -672,7 +672,7 @@ rread(Job *job, Mfile *mf)
char *err;
n = 0;
err = 0;
err = nil;
off = job->request.offset;
cnt = job->request.count;
mf->ref++;
@ -701,7 +701,7 @@ rread(Job *job, Mfile *mf)
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 @@ rwrite(Job *job, Mfile *mf)
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 @@ rclunk(Job *job, Mfile *mf)
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 @@ rstat(Job *job, Mfile *mf)
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 @@ ipid(void)
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 @@ ipid(void)
*
*/
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 @@ ipid(void)
* 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 @@ ipid(void)
}
/* 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 @@ ipid(void)
}
/* 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 @@ netinit(int background)
}
/* 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 @@ netadd(char *p)
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 @@ lookup(Mfile *mf)
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 @@ lookup(Mfile *mf)
}
}
ndbfree(nt);
np = np->next;
break;
}
mf->nextnet = np;
return rv;
@ -1258,24 +1255,25 @@ lookup(Mfile *mf)
*/
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)
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 @@ lookup(Mfile *mf)
/*
* 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 @@ ipserv(Network *np, char *name, char *buf, int blen)
Ndbs s;
/* '*' means any service */
if(strcmp(name, "*")==0){
if(strcmp(name, "*") == 0){
nstrcpy(buf, name, blen);
return buf;
}
@ -1330,14 +1328,14 @@ ipserv(Network *np, char *name, char *buf, int blen)
else if(isalpha(*p) || *p == '-' || *p == '$')
alpha = 1;
else
return 0;
return nil;
}
t = nil;
p = nil;
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 @@ ipserv(Network *np, char *name, char *buf, int blen)
}
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 @@ ipattrlookup(Ndb *db, char *ipa, char *attr, char *val, int vlen)
* 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 @@ iplookup(Network *np, char *host, char *serv, int nolookup)
uchar tnet[IPaddrlen];
Ipifc *ifc;
Iplifc *lifc;
USED(nolookup);
int v6;
/*
* 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 @@ iplookup(Network *np, char *host, char *serv, int nolookup)
*/
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 @@ iplookup(Network *np, char *host, char *serv, int nolookup)
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 @@ iptrans(Ndbtuple *t, Network *np, char *serv, char *rem, int hack)
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 @@ iptrans(Ndbtuple *t, Network *np, char *serv, char *rem, int hack)
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 @@ iptrans(Ndbtuple *t, Network *np, char *serv, char *rem, int hack)
* 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 @@ telcotrans(Ndbtuple *t, Network *np, char *serv, char *rem, int)
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 @@ reorder(Ndbtuple *t, Ndbtuple *x)
/* 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 @@ dnsip6lookup(char *mntpt, char *buf, Ndbtuple *t)
* 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;
@ -1689,16 +1699,16 @@ dnsiplookup(char *host, Ndbs *s)
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;
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 @@ qmatch(Ndbtuple *t, char **attr, char **val, int n)
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 @@ qreply(Mfile *mf, Ndbtuple *t)
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 @@ genquery(Mfile *mf, char *query)
/* 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 @@ genquery(Mfile *mf, char *query)
/* 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 @@ genquery(Mfile *mf, char *query)
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 @@ ipresolve(char *attr, char *host)
{
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){