From e3b8279f26547b3af44fe11e1469a3b185a1278d Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Thu, 13 Jul 2017 17:16:45 +0200 Subject: VIRT-PHY: Use IPv4 multicast groups for private / local scope The addresses in the original code make little sense: * 224.0.0.1 is "All systems on this subnet" and not routed outside the local ethernet segment * 225.0.0.1 is in a RESERVED range that shouldn't be used Change-Id: Iba1ae69f3f193a33f1da343c6562f67bd8d3557f --- src/osmo-bts-virtual/virtual_um.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'src') diff --git a/src/osmo-bts-virtual/virtual_um.h b/src/osmo-bts-virtual/virtual_um.h index 6e7c3841..ac098dd4 100644 --- a/src/osmo-bts-virtual/virtual_um.h +++ b/src/osmo-bts-virtual/virtual_um.h @@ -4,10 +4,15 @@ #include #include "osmo_mcast_sock.h" +/* We use multicast group addresses from the 239.192.0.0/14 rage, as + * those are designated by RFC2365 as "IPv4 Organization Local Scope, + * "... the space from which an organization should allocate sub- + * ranges when defining scopes for private use." */ + #define VIRT_UM_MSGB_SIZE 256 -#define DEFAULT_MS_MCAST_GROUP "224.0.0.1" +#define DEFAULT_MS_MCAST_GROUP "239.193.23.1" #define DEFAULT_MS_MCAST_PORT 4729 /* IANA-registered port for GSMTAP */ -#define DEFAULT_BTS_MCAST_GROUP "225.0.0.1" +#define DEFAULT_BTS_MCAST_GROUP "239.193.23.2" #define DEFAULT_BTS_MCAST_PORT 4729 /* IANA-registered port for GSMTAP */ struct virt_um_inst { -- cgit v1.2.3