From 7ba1f8acd8afb451a05276eda5d3567a53ef2fb3 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Tue, 15 Jul 2014 10:51:09 +0200 Subject: [PATCH] blobmsg: add blobmsg_check_array, which returns the size of the array Signed-off-by: Felix Fietkau --- blobmsg.c | 20 ++++++++++++++------ blobmsg.h | 9 +++++++++ 2 files changed, 23 insertions(+), 6 deletions(-) diff --git a/blobmsg.c b/blobmsg.c index f317152..a2c2c5d 100644 --- a/blobmsg.c +++ b/blobmsg.c @@ -62,11 +62,12 @@ bool blobmsg_check_attr(const struct blob_attr *attr, bool name) return blob_check_type(data, len, blob_type[id]); } -bool blobmsg_check_attr_list(const struct blob_attr *attr, int type) +int blobmsg_check_array(const struct blob_attr *attr, int type) { struct blob_attr *cur; bool name; int rem; + int size = 0; switch (blobmsg_type(attr)) { case BLOBMSG_TYPE_TABLE: @@ -76,18 +77,25 @@ bool blobmsg_check_attr_list(const struct blob_attr *attr, int type) name = false; break; default: - return false; + return -1; } blobmsg_for_each_attr(cur, attr, rem) { - if (blobmsg_type(cur) != type) - return false; + if (type != BLOBMSG_TYPE_UNSPEC && blobmsg_type(cur) != type) + return -1; if (!blobmsg_check_attr(cur, name)) - return false; + return -1; + + size++; } - return true; + return size; +} + +bool blobmsg_check_attr_list(const struct blob_attr *attr, int type) +{ + return blobmsg_check_array(attr, type) >= 0; } int blobmsg_parse_array(const struct blobmsg_policy *policy, int policy_len, diff --git a/blobmsg.h b/blobmsg.h index d8f1045..082980a 100644 --- a/blobmsg.h +++ b/blobmsg.h @@ -90,6 +90,15 @@ static inline int blobmsg_len(const struct blob_attr *attr) bool blobmsg_check_attr(const struct blob_attr *attr, bool name); bool blobmsg_check_attr_list(const struct blob_attr *attr, int type); + +/* + * blobmsg_check_array: validate array/table and return size + * + * Checks if all elements of an array or table are valid and have + * the specified type. Returns the number of elements in the array + */ +int blobmsg_check_array(const struct blob_attr *attr, int type); + int blobmsg_parse(const struct blobmsg_policy *policy, int policy_len, struct blob_attr **tb, void *data, unsigned int len); int blobmsg_parse_array(const struct blobmsg_policy *policy, int policy_len, -- 2.11.0