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authorJoe Hershberger <joe.hershberger@ni.com>2018-09-26 16:48:57 -0500
committerJoe Hershberger <joe.hershberger@ni.com>2018-10-10 12:28:58 -0500
commitc67a420781012abb5c888e2857efde12cf27284b (patch)
tree4262632a50fe817a1ba0efc7aa25b55594c93d7a
parent76a503439e38be9d4fe365bdf87a6d0e74ea41c9 (diff)
net: sandbox: Allow fake eth to handle more than 1 packet response
Use up to the max allocated receive buffers so as to be able to test more complex situations. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
-rw-r--r--arch/sandbox/include/asm/eth.h10
-rw-r--r--drivers/net/sandbox.c57
2 files changed, 52 insertions, 15 deletions
diff --git a/arch/sandbox/include/asm/eth.h b/arch/sandbox/include/asm/eth.h
index ced6d51999..7a49e98fa8 100644
--- a/arch/sandbox/include/asm/eth.h
+++ b/arch/sandbox/include/asm/eth.h
@@ -55,16 +55,18 @@ 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;
};
diff --git a/drivers/net/sandbox.c b/drivers/net/sandbox.c
index 6f0fe0ced5..9c0e0d009e 100644
--- a/drivers/net/sandbox.c
+++ b/drivers/net/sandbox.c
@@ -71,11 +71,15 @@ int sandbox_eth_arp_req_to_reply(struct udevice *dev, void *packet,
if (ntohs(arp->ar_op) != ARPOP_REQUEST)
return -EAGAIN;
+ /* 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 0;
}
@@ -127,8 +133,12 @@ int sandbox_eth_ping_req_to_reply(struct udevice *dev, void *packet,
if (icmp->type != ICMP_ECHO_REQUEST)
return -EAGAIN;
+ /* 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 0;
}
@@ -201,7 +212,11 @@ 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;
}
@@ -227,18 +242,37 @@ 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");
@@ -257,6 +291,7 @@ 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,
};