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[tcpip] Allow for transmission to multicast IPv4 addresses

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When sending to a multicast address, it may be necessary to specify
the source address explicitly, since the multicast destination address
does not provide enough information to deduce the source address via
the miniroute table.

Allow the source address specified via the data-xfer metadata to be
passed down through the TCP/IP stack to the IPv4 layer, which can use
it as a default source address.
This commit is contained in:
Michael Brown
2009-01-21 03:40:39 +00:00
parent b4a95a8974
commit d230b53df2
7 changed files with 29 additions and 20 deletions
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1
src/net/ipv6.c
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@@ -176,6 +176,7 @@ void ipv6_dump ( struct ip6_header *ip6hdr ) {
*/
static int ipv6_tx ( struct io_buffer *iobuf,
struct tcpip_protocol *tcpip,
struct sockaddr_tcpip *st_src __unused,
struct sockaddr_tcpip *st_dest,
struct net_device *netdev,
uint16_t *trans_csum ) {