diff options
| author | Leonid Bloch <leonid.bloch@ravellosystems.com> | 2015-11-11 15:52:45 +0200 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2015-11-12 15:26:54 +0800 |
| commit | 4aeea330f022f45d0dabff6090ecbb98755c2116 (patch) | |
| tree | c434b0606d3aa2df86a7bcab2abc589a079025f8 /hw/net/e1000.c | |
| parent | 45e93764711484440e56f580f233009bb3da18bc (diff) | |
e1000: Fixing the packet address filtering procedure
Previously, if promiscuous unicast was enabled, a packet was received
straight away, even if it was a multicast or a broadcast packet. This
patch fixes that behavior, while making the filtering procedure a bit
more human-readable.
Signed-off-by: Leonid Bloch <leonid.bloch@ravellosystems.com>
Signed-off-by: Dmitry Fleytman <dmitry.fleytman@ravellosystems.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'hw/net/e1000.c')
| -rw-r--r-- | hw/net/e1000.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/hw/net/e1000.c b/hw/net/e1000.c index 9967b5dbf7..821fed4fd8 100644 --- a/hw/net/e1000.c +++ b/hw/net/e1000.c @@ -872,6 +872,7 @@ receive_filter(E1000State *s, const uint8_t *buf, int size) static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; static const int mta_shift[] = {4, 3, 2, 0}; uint32_t f, rctl = s->mac_reg[RCTL], ra[2], *rp; + int isbcast = !memcmp(buf, bcast, sizeof bcast), ismcast = (buf[0] & 1); if (is_vlan_packet(s, buf) && vlan_rx_filter_enabled(s)) { uint16_t vid = be16_to_cpup((uint16_t *)(buf + 14)); @@ -881,14 +882,17 @@ receive_filter(E1000State *s, const uint8_t *buf, int size) return 0; } - if (rctl & E1000_RCTL_UPE) // promiscuous + if (!isbcast && !ismcast && (rctl & E1000_RCTL_UPE)) { /* promiscuous ucast */ return 1; + } - if ((buf[0] & 1) && (rctl & E1000_RCTL_MPE)) // promiscuous mcast + if (ismcast && (rctl & E1000_RCTL_MPE)) { /* promiscuous mcast */ return 1; + } - if ((rctl & E1000_RCTL_BAM) && !memcmp(buf, bcast, sizeof bcast)) + if (isbcast && (rctl & E1000_RCTL_BAM)) { /* broadcast enabled */ return 1; + } for (rp = s->mac_reg + RA; rp < s->mac_reg + RA + 32; rp += 2) { if (!(rp[1] & E1000_RAH_AV)) |