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MEDIUM: vars: Be able to retrieve variable of the parent stream, if any 

It is now possible to retrieved the value of a variable using the parent
stream or the parent session instead of the current one. It remains
forbidden to set or unset this value. The sample fetch used to store the
result is a local copy. So it may be safely altered by a converter without
changing the value of the original variable.

Note that for now, the parent of a stream is never set. So this part is not
really used. This will change with the SPOE.
This commit is contained in:
Christopher Faulet 2024-07-17 16:54:45 +02:00
parent 1a1afecb8b
commit 230c1570ac
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/vars.c
View File

@ -64,6 +64,13 @@ static inline struct vars *get_vars(struct session *sess, struct stream *strm, c
if (!desc)
return NULL;
if (desc->flags & VDF_PARENT_CTX) {
if (!strm || !strm->parent)
return NULL;
strm = strm->parent;
sess = strm_sess(strm);
}
switch (desc->scope) {
case SCOPE_PROC:
return &proc_vars;
@ -758,9 +765,6 @@ int vars_get_by_name(const char *name, size_t len, struct sample *smp, const str
if (!vars_fill_desc(name, len, &desc, NULL))
return 0;
if (desc.flags & VDF_PARENT_CTX)
return 0;
/* Select "vars" pool according with the scope. */
vars = get_vars(smp->sess, smp->strm, &desc);
if (!vars || vars->scope != desc.scope)
@ -786,9 +790,6 @@ int vars_get_by_desc(const struct var_desc *var_desc, struct sample *smp, const
{
struct vars *vars;
if (var_desc->flags & VDF_PARENT_CTX)
return 0;
/* Select "vars" pool according with the scope. */
vars = get_vars(smp->sess, smp->strm, var_desc);