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-rw-r--r--slirp/if.c4
-rw-r--r--slirp/slirp.c9
2 files changed, 7 insertions, 6 deletions
diff --git a/slirp/if.c b/slirp/if.c
index 2ce9a6424f..94132ca888 100644
--- a/slirp/if.c
+++ b/slirp/if.c
@@ -52,8 +52,8 @@ if_init()
if_maxlinkhdr = 40;
#endif
#else
- /* 14 for ethernet + 40 */
- if_maxlinkhdr = 14 + 40;
+ /* 2 for alignment, 14 for ethernet, 40 for TCP/IP */
+ if_maxlinkhdr = 2 + 14 + 40;
#endif
if_mtu = 1500;
if_mru = 1500;
diff --git a/slirp/slirp.c b/slirp/slirp.c
index e88745e8aa..6ba753e735 100644
--- a/slirp/slirp.c
+++ b/slirp/slirp.c
@@ -610,11 +610,12 @@ void slirp_input(const uint8_t *pkt, int pkt_len)
m = m_get();
if (!m)
return;
- m->m_len = pkt_len;
- memcpy(m->m_data, pkt, pkt_len);
+ /* Note: we add to align the IP header */
+ m->m_len = pkt_len + 2;
+ memcpy(m->m_data + 2, pkt, pkt_len);
- m->m_data += ETH_HLEN;
- m->m_len -= ETH_HLEN;
+ m->m_data += 2 + ETH_HLEN;
+ m->m_len -= 2 + ETH_HLEN;
ip_input(m);
break;