diff options
Diffstat (limited to 'drivers/net/sandbox.c')
| -rw-r--r-- | drivers/net/sandbox.c | 57 |
1 files changed, 46 insertions, 11 deletions
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, }; |