From 5a82362ad0bf06bba3377d63ca0ecd05fb74f322 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Wed, 20 Jul 2011 12:20:15 +0200 Subject: [PATCH] slirp: Strictly associate DHCP/BOOTP and TFTP with virtual host Instead of accepting every DHCP/BOOTP and TFTP packet, only invoke the built-in servers if the target is the virtual host. Signed-off-by: Jan Kiszka Signed-off-by: Anthony Liguori --- slirp/udp.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/slirp/udp.c b/slirp/udp.c index f1a9a10948..cefd50b792 100644 --- a/slirp/udp.c +++ b/slirp/udp.c @@ -120,15 +120,18 @@ udp_input(register struct mbuf *m, int iphlen) /* * handle DHCP/BOOTP */ - if (ntohs(uh->uh_dport) == BOOTP_SERVER) { - bootp_input(m); - goto bad; - } + if (ntohs(uh->uh_dport) == BOOTP_SERVER && + (ip->ip_dst.s_addr == slirp->vhost_addr.s_addr || + ip->ip_dst.s_addr == 0xffffffff)) { + bootp_input(m); + goto bad; + } /* * handle TFTP */ - if (ntohs(uh->uh_dport) == TFTP_SERVER) { + if (ntohs(uh->uh_dport) == TFTP_SERVER && + ip->ip_dst.s_addr == slirp->vhost_addr.s_addr) { tftp_input(m); goto bad; } -- 2.11.4.GIT