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Message-ID: <20121020235313.GV254@brightrain.aerifal.cx>
Date: Sat, 20 Oct 2012 19:53:13 -0400
From: Rich Felker <dalias@...ifal.cx>
To: musl@...ts.openwall.com
Subject: Re: [PATCH 4/4] <netinet/ether.h>: Add GNU extensions
ether_ntoa_r() and ether_aton_r()
On Sat, Oct 20, 2012 at 10:15:45PM +0200, Abdoulaye Walsimou Gaye wrote:
> +struct ether_addr *ether_aton_r(const char *s, struct ether_addr *n)
> +{
> + unsigned int i[6];
> + int sz;
> +
> + assert(s != NULL);
> + assert(n != NULL);
> +
> + sz = sscanf(s, " %x:%x:%x:%x:%x:%x ",
> + &i[0], &i[1], &i[2], &i[3], &i[4], &i[5]);
> +
> + if (sz == 6) {
> + n->ether_addr_octet[0] = (unsigned char)i[0];
> + n->ether_addr_octet[1] = (unsigned char)i[1];
> + n->ether_addr_octet[2] = (unsigned char)i[2];
> + n->ether_addr_octet[3] = (unsigned char)i[3];
> + n->ether_addr_octet[4] = (unsigned char)i[4];
> + n->ether_addr_octet[5] = (unsigned char)i[5];
> + return n;
I think this code could be greatly simplified using %hhx as the format
instead of %x, but either way it's lacking any error checking and
accepts lots of inputs that probably should not be accepted. Is this
an issue?
Rich
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