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Added generic message lngth-check.

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FossilOrigin-Name: 9682f12dcb7303376bc5cc009d2afaaff679b541f1ae33e7729184b23ef233cd
This commit is contained in:
7u83@mail.ru 2016-03-07 08:57:14 +00:00
parent a5d463f11e
commit 1701836ddc
1 changed files with 27 additions and 0 deletions
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27
src/cw/conn_process_packet.c
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@ -129,6 +129,29 @@ int cw_send_error_response(struct conn *conn, uint8_t * rawmsg, uint32_t result_
return 1; return 1;
} }
static int check_len(struct conn *conn, struct cw_action_in *a, uint8_t * data, int len,
struct sockaddr *from)
{
if (!a->max_len)
return 1;
if (len < a->min_len) {
cw_dbg(DBG_ELEM_ERR,
"%d (%s) message element too short, len=%d, min len=%d",
a->elem_id, cw_strelemp(conn->actions, a->elem_id), len,
a->min_len);
return 0;
}
if (len > a->max_len) {
cw_dbg(DBG_ELEM_ERR,
"%d (%s) message element too big, len=%d, max len=%d", a->elem_id,
cw_strelemp(conn->actions, a->elem_id), len, a->max_len);
return 0;
}
return 1;
}
static int process_elements(struct conn *conn, uint8_t * rawmsg, int len, static int process_elements(struct conn *conn, uint8_t * rawmsg, int len,
struct sockaddr *from) struct sockaddr *from)
@ -284,6 +307,10 @@ static int process_elements(struct conn *conn, uint8_t * rawmsg, int len,
continue; continue;
} }
if (!check_len(conn,af,cw_get_elem_data(elem), elem_len,from)){
continue;
}
int afrc = 1; int afrc = 1;
if (af->start) { if (af->start) {
afrc = afrc =