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authoraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-01-08 19:24:00 +0000
committeraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-01-08 19:24:00 +0000
commita9ba3a856d8e84f4c32bcfa2b92727b7add4996c (patch)
treee45a11e63905d3a231456c272d0e094d7a869974 /slirp/ip_input.c
parente1c5a2b33409b9795fa58bf389eac855981330a5 (diff)
downloadqemu-arm-a9ba3a856d8e84f4c32bcfa2b92727b7add4996c.tar.gz
Add slirp_restrict option (Gleb Natapov)
Add "slirp firewall" to permit connection only to vmchannel addresses. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6241 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'slirp/ip_input.c')
-rw-r--r--slirp/ip_input.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/slirp/ip_input.c b/slirp/ip_input.c
index b04684027d..73cb00ea94 100644
--- a/slirp/ip_input.c
+++ b/slirp/ip_input.c
@@ -136,6 +136,27 @@ ip_input(m)
STAT(ipstat.ips_tooshort++);
goto bad;
}
+
+ if (slirp_restrict) {
+ if (memcmp(&ip->ip_dst.s_addr, &special_addr, 3)) {
+ if (ip->ip_dst.s_addr == 0xffffffff && ip->ip_p != IPPROTO_UDP)
+ goto bad;
+ } else {
+ int host = ntohl(ip->ip_dst.s_addr) & 0xff;
+ struct ex_list *ex_ptr;
+
+ if (host == 0xff)
+ goto bad;
+
+ for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
+ if (ex_ptr->ex_addr == host)
+ 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);