ax25: add link layer header validation function
[ Upstream commit ea47781c26
]
As variable length protocol, AX25 fails link layer header validation
tests based on a minimum length. header_ops.validate allows protocols
to validate headers that are shorter than hard_header_len. Implement
this callback for AX25.
See also http://comments.gmane.org/gmane.linux.network/401064
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
wifi-calibration
parent
1df16498df
commit
58ba5f64ec
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@ -229,8 +229,23 @@ netdev_tx_t ax25_ip_xmit(struct sk_buff *skb)
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}
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#endif
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static bool ax25_validate_header(const char *header, unsigned int len)
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{
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ax25_digi digi;
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if (!len)
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return false;
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if (header[0])
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return true;
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return ax25_addr_parse(header + 1, len - 1, NULL, NULL, &digi, NULL,
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NULL);
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}
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const struct header_ops ax25_header_ops = {
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.create = ax25_hard_header,
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.validate = ax25_validate_header,
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};
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EXPORT_SYMBOL(ax25_header_ops);
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