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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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src/net/tcp.c
+2 -2
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@@ -491,7 +491,7 @@ static int tcp_xmit ( struct tcp_connection *tcp, int force_send ) {
DBGC ( tcp, "\n" );
/* Transmit packet */
return tcpip_tx ( iobuf, &tcp_protocol, &tcp->peer, NULL,
return tcpip_tx ( iobuf, &tcp_protocol, NULL, &tcp->peer, NULL,
&tcphdr->csum );
}
@@ -572,7 +572,7 @@ static int tcp_xmit_reset ( struct tcp_connection *tcp,
DBGC ( tcp, "\n" );
/* Transmit packet */
return tcpip_tx ( iobuf, &tcp_protocol, st_dest,
return tcpip_tx ( iobuf, &tcp_protocol, NULL, st_dest,
NULL, &tcphdr->csum );
}