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Document ip_get_data and ip_get_data_any.

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david 2011-10-29 19:40:14 +00:00
parent 622e2e08a7
commit 17e54e2d0e
1 changed files with 7 additions and 0 deletions
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7
libnetutil/netutil.cc
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@ -687,11 +687,18 @@ static const void *ip_get_data_primitive(const void *packet, unsigned int *len,
return NULL;
}
/* Find the beginning of the data payload in the IP packet beginning at packet.
Returns the beginning of the payload, updates *len to be the length of the
payload, and fills in hdr if successful. Otherwise returns NULL and *hdr is
undefined. */
const void *ip_get_data(const void *packet, unsigned int *len,
struct abstract_ip_hdr *hdr) {
return ip_get_data_primitive(packet, len, hdr, true);
}
/* As ip_get_data, except that it doesn't insist that the payload be a known
upper-layer protocol. This can matter in IPv6 where the last element of a nh
chain may be a protocol we don't know about. */
const void *ip_get_data_any(const void *packet, unsigned int *len,
struct abstract_ip_hdr *hdr) {
return ip_get_data_primitive(packet, len, hdr, false);