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MINOR: opentracing: improved normalization of context variable names
The flag_cpy parameter has been added to the flt_ot_normalize_name() function, through which we can determine whether the function converts special characters (which are part of that name) when copying a variable name. This patch must be backported in 2.5.
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@ -158,6 +158,7 @@ static inline struct vars *flt_ot_get_vars(struct stream *s, const char *scope)
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* size -
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* len -
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* name -
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* flag_cpy -
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* err -
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*
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* DESCRIPTION
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@ -166,11 +167,11 @@ static inline struct vars *flt_ot_get_vars(struct stream *s, const char *scope)
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* RETURN VALUE
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* -
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*/
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static int flt_ot_normalize_name(char *var_name, size_t size, int *len, const char *name, char **err)
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static int flt_ot_normalize_name(char *var_name, size_t size, int *len, const char *name, bool flag_cpy, char **err)
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{
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int retval = 0;
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FLT_OT_FUNC("%p, %zu, %p, \"%s\", %p:%p", var_name, size, len, name, FLT_OT_DPTR_ARGS(err));
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FLT_OT_FUNC("%p, %zu, %p, \"%s\", %hhu, %p:%p", var_name, size, len, name, flag_cpy, FLT_OT_DPTR_ARGS(err));
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if (!FLT_OT_STR_ISVALID(name))
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FLT_OT_RETURN(retval);
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@ -186,33 +187,45 @@ static int flt_ot_normalize_name(char *var_name, size_t size, int *len, const ch
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else
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retval = -1;
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/*
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* HAProxy does not allow the use of variable names containing '-'
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* or ' '. This of course applies to HTTP header names as well.
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* Also, here the capital letters are converted to lowercase.
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*/
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while (retval != -1)
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if (*len >= (size - 1)) {
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if (flag_cpy) {
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retval = strlen(name);
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if ((*len + retval + 1) > size) {
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FLT_OT_ERR("failed to normalize variable name, buffer too small");
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retval = -1;
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} else {
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uint8_t ch = name[retval];
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if (ch == '\0')
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break;
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else if (ch == '-')
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ch = FLT_OT_VAR_CHAR_DASH;
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else if (ch == ' ')
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ch = FLT_OT_VAR_CHAR_SPACE;
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else if (isupper(ch))
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ch = ist_lc[ch];
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var_name[(*len)++] = ch;
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retval++;
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(void)memcpy(var_name + *len, name, retval + 1);
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*len += retval;
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}
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} else {
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/*
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* HAProxy does not allow the use of variable names containing '-'
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* or ' '. This of course applies to HTTP header names as well.
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* Also, here the capital letters are converted to lowercase.
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*/
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while (retval != -1)
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if (*len >= (size - 1)) {
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FLT_OT_ERR("failed to normalize variable name, buffer too small");
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var_name[*len] = '\0';
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retval = -1;
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} else {
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uint8_t ch = name[retval];
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if (ch == '\0')
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break;
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else if (ch == '-')
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ch = FLT_OT_VAR_CHAR_DASH;
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else if (ch == ' ')
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ch = FLT_OT_VAR_CHAR_SPACE;
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else if (isupper(ch))
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ch = ist_lc[ch];
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var_name[(*len)++] = ch;
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retval++;
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}
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var_name[*len] = '\0';
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}
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FLT_OT_DBG(3, "var_name: \"%s\" %d/%d", var_name, retval, *len);
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@ -231,6 +244,7 @@ static int flt_ot_normalize_name(char *var_name, size_t size, int *len, const ch
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* scope -
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* prefix -
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* name -
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* flag_cpy -
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* var_name -
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* size -
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* err -
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@ -243,15 +257,15 @@ static int flt_ot_normalize_name(char *var_name, size_t size, int *len, const ch
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* RETURN VALUE
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* -
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*/
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static int flt_ot_var_name(const char *scope, const char *prefix, const char *name, char *var_name, size_t size, char **err)
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static int flt_ot_var_name(const char *scope, const char *prefix, const char *name, bool flag_cpy, char *var_name, size_t size, char **err)
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{
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int retval = 0;
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FLT_OT_FUNC("\"%s\", \"%s\", \"%s\", %p, %zu, %p:%p", scope, prefix, name, var_name, size, FLT_OT_DPTR_ARGS(err));
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FLT_OT_FUNC("\"%s\", \"%s\", \"%s\", %hhu, %p, %zu, %p:%p", scope, prefix, name, flag_cpy, var_name, size, FLT_OT_DPTR_ARGS(err));
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if (flt_ot_normalize_name(var_name, size, &retval, scope, err) >= 0)
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if (flt_ot_normalize_name(var_name, size, &retval, prefix, err) >= 0)
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(void)flt_ot_normalize_name(var_name, size, &retval, name, err);
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if (flt_ot_normalize_name(var_name, size, &retval, scope, 0, err) >= 0)
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if (flt_ot_normalize_name(var_name, size, &retval, prefix, 0, err) >= 0)
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(void)flt_ot_normalize_name(var_name, size, &retval, name, flag_cpy, err);
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if (retval == -1)
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FLT_OT_ERR("failed to construct variable name '%s.%s.%s'", scope, prefix, name);
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@ -284,7 +298,7 @@ int flt_ot_var_register(const char *scope, const char *prefix, const char *name,
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FLT_OT_FUNC("\"%s\", \"%s\", \"%s\", %p:%p", scope, prefix, name, FLT_OT_DPTR_ARGS(err));
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var_name_len = flt_ot_var_name(scope, prefix, name, var_name, sizeof(var_name), err);
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var_name_len = flt_ot_var_name(scope, prefix, name, 0, var_name, sizeof(var_name), err);
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if (var_name_len == -1)
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FLT_OT_RETURN(retval);
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@ -333,7 +347,7 @@ int flt_ot_var_set(struct stream *s, const char *scope, const char *prefix, cons
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FLT_OT_FUNC("%p, \"%s\", \"%s\", \"%s\", \"%s\", %u, %p:%p", s, scope, prefix, name, value, opt, FLT_OT_DPTR_ARGS(err));
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var_name_len = flt_ot_var_name(scope, prefix, name, var_name, sizeof(var_name), err);
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var_name_len = flt_ot_var_name(scope, prefix, name, 0, var_name, sizeof(var_name), err);
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if (var_name_len == -1)
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FLT_OT_RETURN(retval);
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@ -383,7 +397,7 @@ int flt_ot_vars_unset(struct stream *s, const char *scope, const char *prefix, u
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if (vars == NULL)
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FLT_OT_RETURN(retval);
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var_prefix_len = flt_ot_var_name(NULL, prefix, NULL, var_prefix, sizeof(var_prefix), err);
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var_prefix_len = flt_ot_var_name(NULL, prefix, NULL, 0, var_prefix, sizeof(var_prefix), err);
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if (var_prefix_len == -1)
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FLT_OT_RETURN(retval);
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@ -447,7 +461,7 @@ struct otc_text_map *flt_ot_vars_get(struct stream *s, const char *scope, const
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if (vars == NULL)
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FLT_OT_RETURN(retptr);
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rc = flt_ot_var_name(NULL, prefix, NULL, var_name, sizeof(var_name), err);
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rc = flt_ot_var_name(NULL, prefix, NULL, 0, var_name, sizeof(var_name), err);
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if (rc == -1)
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FLT_OT_RETURN(retptr);
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