diff options
| author | Michael Brown <mcb30@ipxe.org> | 2014-03-04 13:10:07 +0000 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2014-03-04 13:13:54 +0000 |
| commit | 6414b5ca036ade7545eb0c309c66731fced6e055 (patch) | |
| tree | dd73109b6fbbff5e176b87c30df744665595cafb /src/include | |
| parent | db67de6f31a062dc1995d4561be83cd51609d6c4 (diff) | |
| download | ipxe-6414b5ca036ade7545eb0c309c66731fced6e055.zip ipxe-6414b5ca036ade7545eb0c309c66731fced6e055.tar.gz ipxe-6414b5ca036ade7545eb0c309c66731fced6e055.tar.bz2 | |
[tcpip] Provide tcpip_mtu() to determine the maximum transmission unit
Provide the function tcpip_mtu() to allow external code to determine
the (transport-layer) maximum transmission unit for a given socket
address.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/tcpip.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/include/ipxe/tcpip.h b/src/include/ipxe/tcpip.h index d28689a..200630d 100644 --- a/src/include/ipxe/tcpip.h +++ b/src/include/ipxe/tcpip.h @@ -97,6 +97,8 @@ struct tcpip_net_protocol { const char *name; /** Network address family */ sa_family_t sa_family; + /** Fixed header length */ + size_t header_len; /** * Transmit packet * @@ -148,6 +150,7 @@ extern int tcpip_tx ( struct io_buffer *iobuf, struct tcpip_protocol *tcpip, struct net_device *netdev, uint16_t *trans_csum ); extern struct net_device * tcpip_netdev ( struct sockaddr_tcpip *st_dest ); +extern size_t tcpip_mtu ( struct sockaddr_tcpip *st_dest ); extern uint16_t generic_tcpip_continue_chksum ( uint16_t partial, const void *data, size_t len ); extern uint16_t tcpip_chksum ( const void *data, size_t len ); |