netcdf-c/libdap2/dapdump.c
Dennis Heimbigner 4db4393e69 Begin changing over to use strlcat instead of strncat because
strlcat provides better protection against buffer overflows.

Code is taken from the FreeBSD project source code. Specifically:
https://github.com/freebsd/freebsd/blob/master/lib/libc/string/strlcat.c
License appears to be acceptable, but needs to be checked by e.g. Debian.

Step 1:
1. Add to netcdf-c/include/ncconfigure.h to use our version
   if not already available as determined by HAVE_STRLCAT in config.h.
2. Add the strlcat code to libdispatch/dstring.c
3. Turns out that strlcat was already defined in several places.
   So remove it from:
	ncgen3/genlib.c
	ncdump/dumplib.c
3. Define strlcat extern definition in ncconfigure.h.
4. Modify following directories to use strlcat:
	libdap2 libdap4 ncdap_test dap4_test
   Will do others in subsequent steps.
2017-11-23 10:55:24 -07:00

636 lines
17 KiB
C

/*********************************************************************
* Copyright 1993, UCAR/Unidata
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
*********************************************************************/
#include "config.h"
#ifdef USE_PARALLEL
#include "netcdf_par.h"
#endif
#include "dapincludes.h"
#include "dapdump.h"
#include "dceconstraints.h"
#define CHECK(n) if((n) != NC_NOERR) {return (n);} else {}
static void dumptreer(CDFnode* root, NCbytes* buf, int indent, int visible);
int
dumpmetadata(int ncid, NChdr** hdrp)
{
int stat,i,j,k;
NChdr* hdr = (NChdr*)calloc(1,sizeof(NChdr));
MEMCHECK(hdr,NC_ENOMEM);
hdr->ncid = ncid;
hdr->content = ncbytesnew();
if(hdrp) *hdrp = hdr;
stat = nc_inq(hdr->ncid,
&hdr->ndims,
&hdr->nvars,
&hdr->ngatts,
&hdr->unlimid);
CHECK(stat);
if(ncdap3debug > 0) {
fprintf(stdout,"ncid=%d ngatts=%d ndims=%d nvars=%d unlimid=%d\n",
hdr->ncid,hdr->ngatts,hdr->ndims,hdr->nvars,hdr->unlimid);
}
hdr->gatts = (NCattribute*)calloc(1,hdr->ngatts*sizeof(NCattribute));
MEMCHECK(hdr->gatts,NC_ENOMEM);
if(hdr->ngatts > 0)
fprintf(stdout,"global attributes:\n");
for(i=0;i<hdr->ngatts;i++) {
NCattribute* att = &hdr->gatts[i];
char attname[NC_MAX_NAME];
nc_type nctype;
size_t typesize;
size_t nvalues;
stat = nc_inq_attname(hdr->ncid,NC_GLOBAL,i,attname);
CHECK(stat);
att->name = nulldup(attname);
stat = nc_inq_att(hdr->ncid,NC_GLOBAL,att->name,&nctype,&nvalues);
CHECK(stat);
att->etype = nctypetodap(nctype);
typesize = nctypesizeof(att->etype);
fprintf(stdout,"\t[%d]: name=%s type=%s values(%lu)=",
i,att->name,nctypetostring(octypetonc(att->etype)),
(unsigned long)nvalues);
if(nctype == NC_CHAR) {
size_t len = typesize*nvalues;
char* values = (char*)malloc(len+1);/* for null terminate*/
MEMCHECK(values,NC_ENOMEM);
stat = nc_get_att(hdr->ncid,NC_GLOBAL,att->name,values);
CHECK(stat);
values[len] = '\0';
fprintf(stdout," '%s'",values);
} else {
size_t len = typesize*nvalues;
char* values = (char*)malloc(len);
MEMCHECK(values,NC_ENOMEM);
stat = nc_get_att(hdr->ncid,NC_GLOBAL,att->name,values);
CHECK(stat);
for(k=0;k<nvalues;k++) {
fprintf(stdout," ");
dumpdata1(octypetonc(att->etype),k,values);
}
}
fprintf(stdout,"\n");
}
hdr->dims = (Dim*)malloc(hdr->ndims*sizeof(Dim));
MEMCHECK(hdr->dims,NC_ENOMEM);
for(i=0;i<hdr->ndims;i++) {
hdr->dims[i].dimid = i;
stat = nc_inq_dim(hdr->ncid,
hdr->dims[i].dimid,
hdr->dims[i].name,
&hdr->dims[i].size);
CHECK(stat);
fprintf(stdout,"dim[%d]: name=%s size=%lu\n",
i,hdr->dims[i].name,(unsigned long)hdr->dims[i].size);
}
hdr->vars = (Var*)malloc(hdr->nvars*sizeof(Var));
MEMCHECK(hdr->vars,NC_ENOMEM);
for(i=0;i<hdr->nvars;i++) {
Var* var = &hdr->vars[i];
nc_type nctype;
var->varid = i;
stat = nc_inq_var(hdr->ncid,
var->varid,
var->name,
&nctype,
&var->ndims,
var->dimids,
&var->natts);
CHECK(stat);
var->nctype = (nctype);
fprintf(stdout,"var[%d]: name=%s type=%s |dims|=%d",
i,
var->name,
nctypetostring(var->nctype),
var->ndims);
fprintf(stdout," dims={");
for(j=0;j<var->ndims;j++) {
fprintf(stdout," %d",var->dimids[j]);
}
fprintf(stdout,"}\n");
var->atts = (NCattribute*)malloc(var->natts*sizeof(NCattribute));
MEMCHECK(var->atts,NC_ENOMEM);
for(j=0;j<var->natts;j++) {
NCattribute* att = &var->atts[j];
char attname[NC_MAX_NAME];
size_t typesize;
char* values;
nc_type nctype;
size_t nvalues;
stat = nc_inq_attname(hdr->ncid,var->varid,j,attname);
CHECK(stat);
att->name = nulldup(attname);
stat = nc_inq_att(hdr->ncid,var->varid,att->name,&nctype,&nvalues);
CHECK(stat);
att->etype = nctypetodap(nctype);
typesize = nctypesizeof(att->etype);
values = (char*)malloc(typesize*nvalues);
MEMCHECK(values,NC_ENOMEM);
stat = nc_get_att(hdr->ncid,var->varid,att->name,values);
CHECK(stat);
fprintf(stdout,"\tattr[%d]: name=%s type=%s values(%lu)=",
j,att->name,nctypetostring(octypetonc(att->etype)),(unsigned long)nvalues);
for(k=0;k<nvalues;k++) {
fprintf(stdout," ");
dumpdata1(octypetonc(att->etype),k,values);
}
fprintf(stdout,"\n");
}
}
fflush(stdout);
return NC_NOERR;
}
void
dumpdata1(nc_type nctype, size_t index, char* data)
{
switch (nctype) {
case NC_CHAR:
fprintf(stdout,"'%c' %hhd",data[index],data[index]);
break;
case NC_BYTE:
fprintf(stdout,"%hdB",((signed char*)data)[index]);
break;
case NC_UBYTE:
fprintf(stdout,"%huB",((unsigned char*)data)[index]);
break;
case NC_SHORT:
fprintf(stdout,"%hdS",((short*)data)[index]);
break;
case NC_USHORT:
fprintf(stdout,"%hdUS",((unsigned short*)data)[index]);
break;
case NC_INT:
fprintf(stdout,"%d",((int*)data)[index]);
break;
case NC_UINT:
fprintf(stdout,"%uU",((unsigned int*)data)[index]);
break;
case NC_FLOAT:
fprintf(stdout,"%#gF",((float*)data)[index]);
break;
case NC_DOUBLE:
fprintf(stdout,"%#gD",((double*)data)[index]);
break;
case NC_STRING:
fprintf(stdout,"\"%s\"",((char**)data)[index]);
break;
default:
fprintf(stdout,"Unknown type: %i",nctype);
break;
}
fflush(stdout);
}
/* Following should be kept consistent with
the makeXXXstring3 routines in constraints3.c
*/
/* Convert an NCprojection instance into a string
that can be used with the url
*/
char*
dumpprojections(NClist* projections)
{
char* tmp;
int v = dceverbose;
dceverbose = 1;
tmp = dcelisttostring(projections,",");
dceverbose = v;
return tmp;
}
char*
dumpprojection(DCEprojection* proj)
{
char* tmp;
int v = dceverbose;
dceverbose = 1;
tmp = dcetostring((DCEnode*)proj);
dceverbose = v;
return tmp;
}
char*
dumpselections(NClist* selections)
{
return dcelisttostring(selections,"&");
}
char*
dumpselection(DCEselection* sel)
{
return dcetostring((DCEnode*)sel);
}
char*
dumpconstraint(DCEconstraint* con)
{
char* tmp;
int v = dceverbose;
dceverbose = 1;
tmp = dcetostring((DCEnode*)con);
dceverbose = v;
return tmp;
}
char*
dumpsegments(NClist* segments)
{
return dcelisttostring(segments,".");
}
char*
dumppath(CDFnode* leaf)
{
NClist* path = nclistnew();
NCbytes* buf = ncbytesnew();
char* result;
int i;
if(leaf == NULL) return nulldup("");
collectnodepath(leaf,path,!WITHDATASET);
for(i=0;i<nclistlength(path);i++) {
CDFnode* node = (CDFnode*)nclistget(path,i);
if(i > 0) ncbytescat(buf,".");
ncbytescat(buf,node->ncbasename);
}
result = ncbytesdup(buf);
ncbytesfree(buf);
nclistfree(path);
return result;
}
static void
dumpindent(int indent, NCbytes* buf)
{
static char* indentstr = " ";
int i;
for(i=0;i<indent;i++) ncbytescat(buf,indentstr);
}
static void
dumptreer1(CDFnode* root, NCbytes* buf, int indent, char* tag, int visible)
{
int i;
dumpindent(indent,buf);
ncbytescat(buf,tag);
ncbytescat(buf," {\n");
for(i=0;i<nclistlength(root->subnodes);i++) {
CDFnode* node = (CDFnode*)nclistget(root->subnodes,i);
if(visible && root->invisible) continue;
if(root->nctype == NC_Grid) {
if(i==0) {
dumpindent(indent+1,buf);
ncbytescat(buf,"Array:\n");
} else if(i==1) {
dumpindent(indent+1,buf);
ncbytescat(buf,"Maps:\n");
}
dumptreer(node,buf,indent+2,visible);
} else {
dumptreer(node,buf,indent+1,visible);
}
}
dumpindent(indent,buf);
ncbytescat(buf,"} ");
ncbytescat(buf,(root->ncbasename?root->ncbasename:"<?>"));
}
static void
dumptreer(CDFnode* root, NCbytes* buf, int indent, int visible)
{
int i;
char* primtype = NULL;
NClist* dimset = NULL;
if(visible && root->invisible) return;
switch (root->nctype) {
case NC_Dataset:
dumptreer1(root,buf,indent,"Dataset",visible);
break;
case NC_Sequence:
dumptreer1(root,buf,indent,"Sequence",visible);
break;
case NC_Structure:
dumptreer1(root,buf,indent,"Structure",visible);
break;
case NC_Grid:
dumptreer1(root,buf,indent,"Grid",visible);
break;
case NC_Atomic:
switch (root->etype) {
case NC_BYTE: primtype = "byte"; break;
case NC_CHAR: primtype = "char"; break;
case NC_SHORT: primtype = "short"; break;
case NC_INT: primtype = "int"; break;
case NC_FLOAT: primtype = "float"; break;
case NC_DOUBLE: primtype = "double"; break;
case NC_UBYTE: primtype = "ubyte"; break;
case NC_USHORT: primtype = "ushort"; break;
case NC_UINT: primtype = "uint"; break;
case NC_INT64: primtype = "int64"; break;
case NC_UINT64: primtype = "uint64"; break;
case NC_STRING: primtype = "string"; break;
default: break;
}
dumpindent(indent,buf);
ncbytescat(buf,primtype);
ncbytescat(buf," ");
ncbytescat(buf,(root->ncbasename?root->ncbasename:"<?>"));
break;
default: break;
}
if(nclistlength(root->array.dimsetplus) > 0) dimset = root->array.dimsetplus;
else if(nclistlength(root->array.dimset0) > 0) dimset = root->array.dimset0;
if(dimset != NULL) {
for(i=0;i<nclistlength(dimset);i++) {
CDFnode* dim = (CDFnode*)nclistget(dimset,i);
char tmp[64];
ncbytescat(buf,"[");
if(dim->ncbasename != NULL) {
ncbytescat(buf,dim->ncbasename);
ncbytescat(buf,"=");
}
snprintf(tmp,sizeof(tmp),"%lu",(unsigned long)dim->dim.declsize);
ncbytescat(buf,tmp);
ncbytescat(buf,"]");
}
}
ncbytescat(buf,";\n");
}
char*
dumptree(CDFnode* root)
{
NCbytes* buf = ncbytesnew();
char* result;
dumptreer(root,buf,0,0);
result = ncbytesdup(buf);
ncbytesfree(buf);
return result;
}
char*
dumpvisible(CDFnode* root)
{
NCbytes* buf = ncbytesnew();
char* result;
dumptreer(root,buf,0,1);
result = ncbytesdup(buf);
ncbytesfree(buf);
return result;
}
/* Provide detailed data on a CDFnode */
char*
dumpnode(CDFnode* node)
{
NCbytes* buf = ncbytesnew();
char* result;
int i;
char* nctype = NULL;
char* primtype = NULL;
char tmp[1024];
switch (node->nctype) {
case NC_Dataset: nctype = "Dataset"; break;
case NC_Sequence: nctype = "Sequence"; break;
case NC_Structure: nctype = "Structure"; break;
case NC_Grid: nctype = "Grid"; break;
case NC_Atomic:
switch (node->etype) {
case NC_BYTE: primtype = "byte"; break;
case NC_CHAR: primtype = "char"; break;
case NC_SHORT: primtype = "short"; break;
case NC_INT: primtype = "int"; break;
case NC_FLOAT: primtype = "float"; break;
case NC_DOUBLE: primtype = "double"; break;
case NC_UBYTE: primtype = "ubyte"; break;
case NC_USHORT: primtype = "ushort"; break;
case NC_UINT: primtype = "uint"; break;
case NC_INT64: primtype = "int64"; break;
case NC_UINT64: primtype = "uint64"; break;
case NC_STRING: primtype = "string"; break;
default: break;
}
break;
default: break;
}
snprintf(tmp,sizeof(tmp),"%s %s {\n",
(nctype?nctype:primtype),node->ocname);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"ocnode=%lx\n",(unsigned long)node->ocnode);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"container=%s\n",
(node->container?node->container->ocname:"null"));
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"root=%s\n",
(node->root?node->root->ocname:"null"));
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"ncbasename=%s\n",node->ncbasename);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"ncfullname=%s\n",node->ncfullname);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"|subnodes|=%ld\n",nclistlength(node->subnodes));
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"externaltype=%d\n",node->externaltype);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"ncid=%d\n",node->ncid);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"maxstringlength=%ld\n",node->maxstringlength);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"sequencelimit=%ld\n",node->sequencelimit);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"usesequence=%d\n",node->usesequence);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"elided=%d\n",node->elided);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"invisible=%d\n",node->invisible);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"attachment=%s\n",
(node->attachment?node->attachment->ocname:"null"));
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp),"rank=%lu\n",nclistlength(node->array.dimset0));
ncbytescat(buf,tmp);
for(i=0;i<nclistlength(node->array.dimset0);i++) {
CDFnode* dim = (CDFnode*)nclistget(node->array.dimset0,i);
snprintf(tmp,sizeof(tmp),"dims[%d]={\n",i);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp)," ocname=%s\n",dim->ocname);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp)," ncbasename=%s\n",dim->ncbasename);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp)," dimflags=%u\n",
(unsigned int)dim->dim.dimflags);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp)," declsize=%lu\n",
(unsigned long)dim->dim.declsize);
ncbytescat(buf,tmp);
snprintf(tmp,sizeof(tmp)," }\n");
ncbytescat(buf,tmp);
}
result = ncbytesdup(buf);
ncbytesfree(buf);
return result;
}
char*
dumpalign(NCalignment* ncalign)
{
char* result;
char tmp[1024];
if(ncalign == NULL)
result = nulldup("NCalignment{size=-- alignment=-- offset=--}");
else {
snprintf(tmp,sizeof(tmp),"NCalignment{size=%lu alignment=%lu offset=%lu}",
ncalign->size,ncalign->alignment,ncalign->offset);
result = nulldup(tmp);
}
return result;
}
char*
dumpcachenode(NCcachenode* node)
{
char* result = NULL;
char tmp[8192];
int i;
NCbytes* buf;
if(node == NULL) return strdup("cachenode{null}");
buf = ncbytesnew();
result = dcebuildconstraintstring(node->constraint);
snprintf(tmp,sizeof(tmp),"cachenode%s(%lx){size=%lu; constraint=%s; vars=",
node->isprefetch?"*":"",
(unsigned long)node,
(unsigned long)node->xdrsize,
result);
ncbytescat(buf,tmp);
if(nclistlength(node->vars)==0)
ncbytescat(buf,"null");
else for(i=0;i<nclistlength(node->vars);i++) {
CDFnode* var = (CDFnode*)nclistget(node->vars,i);
if(i > 0) ncbytescat(buf,",");
ncbytescat(buf,makecdfpathstring(var,"."));
}
ncbytescat(buf,"}");
result = ncbytesdup(buf);
ncbytesfree(buf);
return result;
}
char*
dumpcache(NCcache* cache)
{
char* result = NULL;
char tmp[8192];
int i;
NCbytes* buf;
if(cache == NULL) return strdup("cache{null}");
buf = ncbytesnew();
snprintf(tmp,sizeof(tmp),"cache{limit=%lu; size=%lu;\n",
(unsigned long)cache->cachelimit,
(unsigned long)cache->cachesize);
ncbytescat(buf,tmp);
if(cache->prefetch) {
ncbytescat(buf,"\tprefetch=");
ncbytescat(buf,dumpcachenode(cache->prefetch));
ncbytescat(buf,"\n");
}
if(nclistlength(cache->nodes) > 0) {
for(i=0;i<nclistlength(cache->nodes);i++) {
NCcachenode* node = (NCcachenode*)nclistget(cache->nodes,i);
ncbytescat(buf,"\t");
ncbytescat(buf,dumpcachenode(node));
ncbytescat(buf,"\n");
}
}
ncbytescat(buf,"}");
result = ncbytesdup(buf);
ncbytesfree(buf);
return result;
}
/* This should be consistent with makeslicestring3 in constraints3.c */
char*
dumpslice(DCEslice* slice)
{
char buf[8192];
char tmp[8192];
buf[0] = '\0';
if(slice->last > slice->declsize && slice->declsize > 0)
slice->last = slice->declsize - 1;
if(slice->count == 1) {
snprintf(tmp,sizeof(tmp),"[%lu]",
(unsigned long)slice->first);
} else if(slice->stride == 1) {
snprintf(tmp,sizeof(tmp),"[%lu:%lu]",
(unsigned long)slice->first,
(unsigned long)slice->last);
} else {
snprintf(tmp,sizeof(tmp),"[%lu:%lu:%lu]",
(unsigned long)slice->first,
(unsigned long)slice->stride,
(unsigned long)slice->last);
}
strlcat(buf,tmp,sizeof(buf));
return strdup(tmp);
}
char*
dumpslices(DCEslice* slice, unsigned int rank)
{
int i;
NCbytes* buf;
char* result = NULL;
buf = ncbytesnew();
for(i=0;i<rank;i++,slice++) {
char* sslice = dumpslice(slice);
if(sslice != NULL) {
ncbytescat(buf,sslice);
free(sslice);
}
}
result = ncbytesdup(buf);
ncbytesfree(buf);
return result;
}
void
dumpraw(void* o)
{
fprintf(stderr,"%s\n",dcerawtostring(o));
fflush(stderr);
}
void
dumplistraw(NClist* l)
{
fprintf(stderr,"%s\n",dcerawlisttostring(l));
fflush(stderr);
}
/* For debugging */
void
dumpstringlist(NClist* l)
{
int i;
for(i=0;i<nclistlength(l);i++) {
const char* s = (const char*)nclistget(l,i);
fprintf(stderr,"[%d]: |%s|\n",i,s);
}
fflush(stderr);
}