/* rpl.s will be alloc'ed with the proper size & rpl.len set
* returns 0 on success, <0 on error*/
static int replace_build(char* match, int nmatch, regmatch_t* pmatch,
struct subst_expr* se, struct sip_msg* msg, str* rpl)
{
int r;
str* uri;
char* p;
char* dest;
char* end;
int size;
rpl->len=replace_len(match, nmatch, pmatch, se, msg);
if (rpl->len==0){
rpl->s=0; /* emtpy string */
return 0;
}
rpl->s=pkg_malloc(rpl->len);
if (rpl->s==0){
LOG(L_ERR, "ERROR: replace_build: out of mem (rpl)\n");
goto error;
}
p=se->replacement.s;
end=p+se->replacement.len;
dest=rpl->s;
for (r=0; r<se->n_escapes; r++){
/* copy the unescaped parts */
size=se->replacement.s+se->replace[r].offset-p;
memcpy(dest, p, size);
p+=size+se->replace[r].size;
dest+=size;
switch(se->replace[r].type){
case REPLACE_NMATCH:
if ((se->replace[r].u.nmatch<nmatch)&&(
pmatch[se->replace[r].u.nmatch].rm_so!=-1)){
/* do the replace */
size=pmatch[se->replace[r].u.nmatch].rm_eo-
pmatch[se->replace[r].u.nmatch].rm_so;
memcpy(dest,
match+pmatch[se->replace[r].u.nmatch].rm_so,
size);
dest+=size;
};
break;
case REPLACE_CHAR:
*dest=se->replace[r].u.c;
dest++;
break;
case REPLACE_URI:
if (msg->first_line.type!=SIP_REQUEST){
LOG(L_CRIT, "BUG: replace_build: uri substitution on"
" a reply\n");
break; /* ignore, we can continue */
}
uri= (msg->new_uri.s)?(&msg->new_uri):
(&msg->first_line.u.request.uri);
memcpy(dest, uri->s, uri->len);
dest+=uri->len;
break;
default:
LOG(L_CRIT, "BUG: replace_build: unknown type %d\n",
se->replace[r].type);
/* ignore it */
}
}
memcpy(dest, p, end-p);
return 0;
error:
return -1;
}
/*! \brief Replies will be allocated with the proper size & rpl.len set
* \return 0 on success, <0 on error
*/
static int replace_build(const char* match, int nmatch, regmatch_t* pmatch,
struct subst_expr* se, struct sip_msg* msg, str* rpl)
{
int r;
str* uri;
pv_value_t sv;
char* p;
char* dest;
char* end;
int size;
#define REPLACE_BUFFER_SIZE 1024
static char rbuf[REPLACE_BUFFER_SIZE];
#if 0
/* use static bufer now since we cannot easily get the length */
rpl->len=replace_len(match, nmatch, pmatch, se, msg);
if (rpl->len==0){
rpl->s=0; /* empty string */
return 0;
}
rpl->s=pkg_malloc(rpl->len);
if (rpl->s==0){
LM_ERR("out of pkg mem (rpl)\n");
goto error;
}
#endif
p=se->replacement.s;
end=p+se->replacement.len;
dest=rbuf;
for (r=0; r<se->n_escapes; r++){
/* copy the unescaped parts */
size=se->replacement.s+se->replace[r].offset-p;
if(dest-rbuf+size>=REPLACE_BUFFER_SIZE-1){
LM_ERR("overflow\n");
goto error;
}
memcpy(dest, p, size);
p+=size+se->replace[r].size;
dest+=size;
switch(se->replace[r].type){
case REPLACE_NMATCH:
if ((se->replace[r].u.nmatch<nmatch)&&(
pmatch[se->replace[r].u.nmatch].rm_so!=-1)){
/* do the replace */
size=pmatch[se->replace[r].u.nmatch].rm_eo-
pmatch[se->replace[r].u.nmatch].rm_so;
if(dest-rbuf+size>=REPLACE_BUFFER_SIZE-1){
LM_ERR("overflow\n");
goto error;
}
memcpy(dest,
match+pmatch[se->replace[r].u.nmatch].rm_so,
size);
dest+=size;
};
break;
case REPLACE_CHAR:
if(dest-rbuf+1>=REPLACE_BUFFER_SIZE-1){
LM_ERR("overflow\n");
goto error;
}
*dest=se->replace[r].u.c;
dest++;
break;
case REPLACE_URI:
if (msg->first_line.type!=SIP_REQUEST){
LM_CRIT("uri substitution on a reply\n");
break; /* ignore, we can continue */
}
uri= (msg->new_uri.s)?(&msg->new_uri):
(&msg->first_line.u.request.uri);
if(dest-rbuf+uri->len>=REPLACE_BUFFER_SIZE-1){
LM_ERR("overflow\n");
goto error;
}
memcpy(dest, uri->s, uri->len);
dest+=uri->len;
break;
case REPLACE_SPEC:
if(pv_get_spec_value(msg, &se->replace[r].u.spec, &sv)!=0)
{
LM_CRIT("item substitution returned error\n");
break; /* ignore, we can continue */
}
if(dest-rbuf+sv.rs.len>=REPLACE_BUFFER_SIZE-1){
LM_ERR("overflow\n");
goto error;
}
memcpy(dest, sv.rs.s, sv.rs.len);
dest+=sv.rs.len;
break;
default:
LM_CRIT("unknown type %d\n", se->replace[r].type);
/* ignore it */
}
}
memcpy(dest, p, end-p);
rpl->len = (dest-rbuf)+(end-p);
rpl->s=pkg_malloc(rpl->len);
if (rpl->s==0){
LM_ERR("out of pkg mem (rpl)\n");
goto error;
}
memcpy(rpl->s, rbuf, rpl->len);
return 0;
error:
return -1;
}
