diff options
| author |   Jan Kiszka <jan.kiszka@siemens.com> | 2011-07-20 12:20:13 +0200 |
|---|---|---|
| committer |   Anthony Liguori <aliguori@us.ibm.com> | 2011-07-23 10:19:49 -0500 |
| commit | 12b513d837c9da5277390ddaf98ca0058339977a (patch) | |
| tree | 57d4e937818492effc1f31402dc830b1ca0b206c /slirp | |
| parent | Deprecate -M command line options (diff) | |
| download | qemu-kvm-12b513d837c9da5277390ddaf98ca0058339977a.tar.gz qemu-kvm-12b513d837c9da5277390ddaf98ca0058339977a.tar.bz2 qemu-kvm-12b513d837c9da5277390ddaf98ca0058339977a.zip | |
slirp: Fix restricted mode
This aligns the code to what the documentation claims: Allow everything
but requests that would have to be routed outside of the virtual LAN.
So we need to drop the unneeded IP-level filter, allow TFTP requests,
and add the missing protocol-level filter to ICMP.
CC: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'slirp')
| -rw-r--r-- | slirp/ip_icmp.c | 2 | ||||
| -rw-r--r-- | slirp/ip_input.c | 21 | ||||
| -rw-r--r-- | slirp/udp.c | 8 |
3 files changed, 6 insertions, 25 deletions
diff --git a/slirp/ip_icmp.c b/slirp/ip_icmp.c index 751a8e249..0cd129cc9 100644 --- a/slirp/ip_icmp.c +++ b/slirp/ip_icmp.c @@ -101,6 +101,8 @@ icmp_input(struct mbuf *m, int hlen) ip->ip_len += hlen; /* since ip_input subtracts this */ if (ip->ip_dst.s_addr == slirp->vhost_addr.s_addr) { icmp_reflect(m); + } else if (slirp->restricted) { + goto freeit; } else { struct socket *so; struct sockaddr_in addr; diff --git a/slirp/ip_input.c b/slirp/ip_input.c index 768ab0cd4..2ff6adbc4 100644 --- a/slirp/ip_input.c +++ b/slirp/ip_input.c @@ -118,27 +118,6 @@ ip_input(struct mbuf *m) goto bad; } - if (slirp->restricted) { - if ((ip->ip_dst.s_addr & slirp->vnetwork_mask.s_addr) == - slirp->vnetwork_addr.s_addr) { - if (ip->ip_dst.s_addr == 0xffffffff && ip->ip_p != IPPROTO_UDP) - goto bad; - } else { - uint32_t inv_mask = ~slirp->vnetwork_mask.s_addr; - struct ex_list *ex_ptr; - - if ((ip->ip_dst.s_addr & inv_mask) == inv_mask) { - goto bad; - } - for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) - if (ex_ptr->ex_addr.s_addr == ip->ip_dst.s_addr) - break; - - if (!ex_ptr) - goto bad; - } - } - /* Should drop packet if mbuf too long? hmmm... */ if (m->m_len > ip->ip_len) m_adj(m, ip->ip_len - m->m_len); diff --git a/slirp/udp.c b/slirp/udp.c index 02b3793e9..f1a9a1094 100644 --- a/slirp/udp.c +++ b/slirp/udp.c @@ -125,10 +125,6 @@ udp_input(register struct mbuf *m, int iphlen) goto bad; } - if (slirp->restricted) { - goto bad; - } - /* * handle TFTP */ @@ -137,6 +133,10 @@ udp_input(register struct mbuf *m, int iphlen) goto bad; } + if (slirp->restricted) { + goto bad; + } + /* * Locate pcb for datagram. */ |