@@ -49,16 +49,18 @@ typedef int sandbox_eth_tx_hand_f(struct udevice *dev, void *pkt,
* fake_host_hwaddr - MAC address of mocked machine
* fake_host_ipaddr - IP address of mocked machine
* disabled - Will not respond
- * recv_packet_buffer - buffer of the packet returned as received
- * recv_packet_length - length of the packet returned as received
+ * recv_packet_buffer - buffers of the packet returned as received
+ * recv_packet_length - lengths of the packet returned as received
+ * recv_packets - number of packets returned
* tx_handler - function to generate responses to sent packets
*/
struct eth_sandbox_priv {
uchar fake_host_hwaddr[ARP_HLEN];
struct in_addr fake_host_ipaddr;
bool disabled;
- uchar *recv_packet_buffer;
- int recv_packet_length;
+ uchar * recv_packet_buffer[PKTBUFSRX];
+ int recv_packet_length[PKTBUFSRX];
+ int recv_packets;
sandbox_eth_tx_hand_f *tx_handler;
};
@@ -71,11 +71,15 @@ int sandbox_eth_arp_req_to_reply(struct udevice *dev, void *packet,
if (ntohs(arp->ar_op) != ARPOP_REQUEST)
return 0;
+ /* Don't allow the buffer to overrun */
+ if (priv->recv_packets >= PKTBUFSRX)
+ return 0;
+
/* store this as the assumed IP of the fake host */
priv->fake_host_ipaddr = net_read_ip(&arp->ar_tpa);
/* Formulate a fake response */
- eth_recv = (void *)priv->recv_packet_buffer;
+ eth_recv = (void *)priv->recv_packet_buffer[priv->recv_packets];
memcpy(eth_recv->et_dest, eth->et_src, ARP_HLEN);
memcpy(eth_recv->et_src, priv->fake_host_hwaddr, ARP_HLEN);
eth_recv->et_protlen = htons(PROT_ARP);
@@ -91,7 +95,9 @@ int sandbox_eth_arp_req_to_reply(struct udevice *dev, void *packet,
memcpy(&arp_recv->ar_tha, &arp->ar_sha, ARP_HLEN);
net_copy_ip(&arp_recv->ar_tpa, &arp->ar_spa);
- priv->recv_packet_length = ETHER_HDR_SIZE + ARP_HDR_SIZE;
+ priv->recv_packet_length[priv->recv_packets] =
+ ETHER_HDR_SIZE + ARP_HDR_SIZE;
+ ++priv->recv_packets;
return 1;
}
@@ -127,8 +133,12 @@ int sandbox_eth_ping_req_to_reply(struct udevice *dev, void *packet,
if (icmp->type != ICMP_ECHO_REQUEST)
return 0;
+ /* Don't allow the buffer to overrun */
+ if (priv->recv_packets >= PKTBUFSRX)
+ return 0;
+
/* reply to the ping */
- eth_recv = (void *)priv->recv_packet_buffer;
+ eth_recv = (void *)priv->recv_packet_buffer[priv->recv_packets];
memcpy(eth_recv, packet, len);
ipr = (void *)eth_recv + ETHER_HDR_SIZE;
icmpr = (struct icmp_hdr *)&ipr->udp_src;
@@ -144,7 +154,8 @@ int sandbox_eth_ping_req_to_reply(struct udevice *dev, void *packet,
icmpr->checksum = 0;
icmpr->checksum = compute_ip_checksum(icmpr, ICMP_HDR_SIZE);
- priv->recv_packet_length = len;
+ priv->recv_packet_length[priv->recv_packets] = len;
+ ++priv->recv_packets;
return 1;
}
@@ -199,7 +210,11 @@ static int sb_eth_start(struct udevice *dev)
debug("eth_sandbox: Start\n");
- priv->recv_packet_buffer = net_rx_packets[0];
+ priv->recv_packets = 0;
+ for (int i = 0; i < PKTBUFSRX; i++) {
+ priv->recv_packet_buffer[i] = net_rx_packets[i];
+ priv->recv_packet_length[i] = 0;
+ }
return 0;
}
@@ -225,18 +240,37 @@ static int sb_eth_recv(struct udevice *dev, int flags, uchar **packetp)
skip_timeout = false;
}
- if (priv->recv_packet_length) {
- int lcl_recv_packet_length = priv->recv_packet_length;
+ if (priv->recv_packets) {
+ int lcl_recv_packet_length = priv->recv_packet_length[0];
- debug("eth_sandbox: received packet %d\n",
- priv->recv_packet_length);
- priv->recv_packet_length = 0;
- *packetp = priv->recv_packet_buffer;
+ debug("eth_sandbox: received packet[%d], %d waiting\n",
+ lcl_recv_packet_length, priv->recv_packets - 1);
+ *packetp = priv->recv_packet_buffer[0];
return lcl_recv_packet_length;
}
return 0;
}
+static int sb_eth_free_pkt(struct udevice *dev, uchar *packet, int length)
+{
+ struct eth_sandbox_priv *priv = dev_get_priv(dev);
+ int i;
+
+ if (!priv->recv_packets)
+ return 0;
+
+ --priv->recv_packets;
+ for (i = 0; i < priv->recv_packets; i++) {
+ priv->recv_packet_length[i] = priv->recv_packet_length[i + 1];
+ memcpy(priv->recv_packet_buffer[i],
+ priv->recv_packet_buffer[i + 1],
+ priv->recv_packet_length[i + 1]);
+ }
+ priv->recv_packet_length[priv->recv_packets] = 0;
+
+ return 0;
+}
+
static void sb_eth_stop(struct udevice *dev)
{
debug("eth_sandbox: Stop\n");
@@ -255,6 +289,7 @@ static const struct eth_ops sb_eth_ops = {
.start = sb_eth_start,
.send = sb_eth_send,
.recv = sb_eth_recv,
+ .free_pkt = sb_eth_free_pkt,
.stop = sb_eth_stop,
.write_hwaddr = sb_eth_write_hwaddr,
};
Use up to the max allocated receive buffers so be able to test more complex situations. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> --- arch/sandbox/include/asm/eth.h | 10 +++++--- drivers/net/sandbox.c | 57 ++++++++++++++++++++++++++++++++++-------- 2 files changed, 52 insertions(+), 15 deletions(-)