diff options
Diffstat (limited to 'slirp/slirp.c')
| -rw-r--r-- | slirp/slirp.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/slirp/slirp.c b/slirp/slirp.c index 049c2cfb1e..dd4f6d22eb 100644 --- a/slirp/slirp.c +++ b/slirp/slirp.c @@ -766,15 +766,16 @@ void slirp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) m = m_get(slirp); if (!m) return; - /* Note: we add to align the IP header */ - if (M_FREEROOM(m) < pkt_len + 2) { - m_inc(m, pkt_len + 2); + /* Note: we add 2 to align the IP header on 4 bytes, + * and add the margin for the tcpiphdr overhead */ + if (M_FREEROOM(m) < pkt_len + TCPIPHDR_DELTA + 2) { + m_inc(m, pkt_len + TCPIPHDR_DELTA + 2); } - m->m_len = pkt_len + 2; - memcpy(m->m_data + 2, pkt, pkt_len); + m->m_len = pkt_len + TCPIPHDR_DELTA + 2; + memcpy(m->m_data + TCPIPHDR_DELTA + 2, pkt, pkt_len); - m->m_data += 2 + ETH_HLEN; - m->m_len -= 2 + ETH_HLEN; + m->m_data += TCPIPHDR_DELTA + 2 + ETH_HLEN; + m->m_len -= TCPIPHDR_DELTA + 2 + ETH_HLEN; if (proto == ETH_P_IP) { ip_input(m); |