[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH v4 6/7] e1000: Fixing the packet address filtering p
From: |
Leonid Bloch |
Subject: |
[Qemu-devel] [PATCH v4 6/7] e1000: Fixing the packet address filtering procedure |
Date: |
Tue, 3 Nov 2015 13:14:14 +0200 |
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 <address@hidden>
Signed-off-by: Dmitry Fleytman <address@hidden>
---
hw/net/e1000.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/hw/net/e1000.c b/hw/net/e1000.c
index d176a8a..af97e8a 100644
--- a/hw/net/e1000.c
+++ b/hw/net/e1000.c
@@ -868,6 +868,7 @@ 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));
@@ -877,14 +878,17 @@ 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))
--
2.4.3
[Qemu-devel] [PATCH v4 6/7] e1000: Fixing the packet address filtering procedure,
Leonid Bloch <=
[Qemu-devel] [PATCH v4 7/7] e1000: Implementing various counters, Leonid Bloch, 2015/11/03
[Qemu-devel] [PATCH v4 5/7] e1000: Fixing the received/transmitted octets' counters, Leonid Bloch, 2015/11/03