diff options
| author | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-01-08 19:24:00 +0000 |
|---|---|---|
| committer | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-01-08 19:24:00 +0000 |
| commit | a9ba3a856d8e84f4c32bcfa2b92727b7add4996c (patch) | |
| tree | e45a11e63905d3a231456c272d0e094d7a869974 /slirp/ip_input.c | |
| parent | e1c5a2b33409b9795fa58bf389eac855981330a5 (diff) | |
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.c | 21 |
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); |