[U-Boot] [RFC PATCH v2 08/11] net: Add ping6 command and implementation
Joe Hershberger
joe.hershberger at gmail.com
Tue Nov 24 02:06:56 CET 2015
On Mon, Nov 9, 2015 at 1:38 AM, Chris Packham <judge.packham at gmail.com> wrote:
> Signed-off-by: Chris Packham <judge.packham at gmail.com>
>
> ---
>
> Changes in v2:
> - split ping6 support into it's own patch
>
> common/Kconfig | 6 +++
> common/cmd_net.c | 28 ++++++++++++++
> include/net.h | 4 +-
> net/net6.c | 7 ++++
> net/ping6.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 154 insertions(+), 2 deletions(-)
> create mode 100644 net/ping6.c
>
> diff --git a/common/Kconfig b/common/Kconfig
> index 0388a6c..b1effc6 100644
> --- a/common/Kconfig
> +++ b/common/Kconfig
> @@ -431,6 +431,12 @@ config CMD_PING
> help
> Send ICMP ECHO_REQUEST to network host
>
> +config CMD_PING6
> + bool "ping6"
> + depends on CMD_NET6
> + help
> + Send ICMPv6 ECHO_REQUEST to network host
> +
> config CMD_CDP
> bool "cdp"
> help
> diff --git a/common/cmd_net.c b/common/cmd_net.c
> index b2f3c7b..271f91d 100644
> --- a/common/cmd_net.c
> +++ b/common/cmd_net.c
> @@ -11,6 +11,7 @@
> #include <common.h>
> #include <command.h>
> #include <net.h>
> +#include <net6.h>
>
> static int netboot_common(enum proto_t, cmd_tbl_t *, int, char * const []);
>
> @@ -284,6 +285,33 @@ U_BOOT_CMD(
> );
> #endif
>
> +#ifdef CONFIG_CMD_PING6
> +int do_ping6(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
> +{
> + if (argc < 2)
> + return -1;
> +
> + if (string_to_ip6(argv[1], &net_ping_ip6) != 0)
> + return CMD_RET_USAGE;
> +
> + if (net_loop(PING6) < 0) {
> + printf("ping6 failed; host %pI6c is not alive\n",
> + &net_ping_ip6);
> + return 1;
> + }
> +
> + printf("host %pI6c is alive\n", &net_ping_ip6);
> +
> + return 0;
> +}
> +
> +U_BOOT_CMD(
> + ping6, 2, 1, do_ping6,
> + "send ICMPv6 ECHO_REQUEST to network host",
> + "pingAddress"
> +);
> +#endif /* CONFIG_CMD_PING6 */
> +
> #if defined(CONFIG_CMD_CDP)
>
> static void cdp_update_env(void)
> diff --git a/include/net.h b/include/net.h
> index 8b7c878..6a9832c 100644
> --- a/include/net.h
> +++ b/include/net.h
> @@ -524,8 +524,8 @@ extern ushort net_native_vlan; /* Our Native VLAN */
> extern int net_restart_wrap; /* Tried all network devices */
>
> enum proto_t {
> - BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
> - TFTPSRV, TFTPPUT, LINKLOCAL
> + BOOTP, RARP, ARP, TFTPGET, DHCP, PING, PING6, DNS, NFS, CDP, NETCONS,
> + SNTP, TFTPSRV, TFTPPUT, LINKLOCAL
> };
>
> extern char net_boot_file_name[1024];/* Boot File name */
> diff --git a/net/net6.c b/net/net6.c
> index 955a089..8f0c721 100644
> --- a/net/net6.c
> +++ b/net/net6.c
> @@ -370,6 +370,13 @@ void net_ip6_handler(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len)
> return;
>
> switch (icmp->icmp6_type) {
> +#ifdef CONFIG_CMD_PING6
> + case IPV6_ICMP_ECHO_REQUEST:
> + case IPV6_ICMP_ECHO_REPLY:
> + ping6_receive(et, ip6, len);
> + break;
> +#endif /* CONFIG_CMD_PING6 */
> +
> case IPV6_NDISC_NEIGHBOUR_SOLICITATION:
> case IPV6_NDISC_NEIGHBOUR_ADVERTISEMENT:
> ndisc_receive(et, ip6, len);
> diff --git a/net/ping6.c b/net/ping6.c
> new file mode 100644
> index 0000000..34796c6
> --- /dev/null
> +++ b/net/ping6.c
> @@ -0,0 +1,111 @@
> +/*
> + * net/ping6.c
> + *
> + * (C) Copyright 2013 Allied Telesis Labs NZ
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +#define DEBUG
> +#include <common.h>
> +#include <net.h>
> +#include <net6.h>
> +#include "ndisc.h"
> +
> +static ushort seq_no;
> +
> +/* the ipv6 address to ping */
> +struct in6_addr net_ping_ip6;
> +
> +int
+ static int
> +ip6_make_ping(uchar *eth_dst_addr, struct in6_addr *neigh_addr, uchar *pkt)
> +{
> + struct echo_msg *msg;
> + __u16 len;
> + uchar *pkt_old = pkt;
> +
> + len = sizeof(struct echo_msg);
> +
> + pkt += net_set_ether(pkt, eth_dst_addr, PROT_IP6);
> + pkt += ip6_add_hdr(pkt, &net_ip6, neigh_addr, IPPROTO_ICMPV6,
> + IPV6_NDISC_HOPLIMIT, len);
> +
> + /* ICMPv6 - Echo */
> + msg = (struct echo_msg *)pkt;
> + msg->icmph.icmp6_type = IPV6_ICMP_ECHO_REQUEST;
> + msg->icmph.icmp6_code = 0;
> + msg->icmph.icmp6_cksum = 0;
> + msg->icmph.icmp6_identifier = 0;
> + msg->icmph.icmp6_sequence = htons(seq_no++);
> + msg->id = msg->icmph.icmp6_identifier; /* these seem redundant */
> + msg->sequence = msg->icmph.icmp6_sequence;
> +
> + /* checksum */
> + msg->icmph.icmp6_cksum = csum_ipv6_magic(&net_ip6, neigh_addr, len,
> + IPPROTO_ICMPV6,
> + csum_partial((__u8 *)msg, len, 0));
> +
> + pkt += len;
> +
> + return pkt - pkt_old;
> +}
> +
> +int ping6_send(void)
+static int ping6_send(void)
> +{
> + uchar *pkt;
> + static uchar mac[6];
> +
> + /* always send neighbor solicit */
> +
> + memcpy(mac, net_null_ethaddr, 6);
> +
> + net_nd_sol_packet_ip6 = net_ping_ip6;
> + net_nd_packet_mac = mac;
> +
> + pkt = net_nd_tx_packet;
> + pkt += ip6_make_ping(mac, &net_ping_ip6, pkt);
> +
> + /* size of the waiting packet */
> + net_nd_tx_packet_size = (pkt - net_nd_tx_packet);
> +
> + /* and do the ARP request */
> + net_nd_try = 1;
> + net_nd_timer_start = get_timer(0);
> + ndisc_request();
> + return 1; /* waiting */
> +}
> +
> +static void ping6_timeout(void)
> +{
> + eth_halt();
> + net_set_state(NETLOOP_FAIL); /* we did not get the reply */
> +}
> +
> +void ping6_start(void)
> +{
> + printf("Using %s device\n", eth_get_name());
> + net_set_timeout_handler(10000UL, ping6_timeout);
> +
> + ping6_send();
> +}
> +
> +void ping6_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len)
> +{
> + struct icmp6hdr *icmp =
> + (struct icmp6hdr *)(((uchar *)ip6) + IP6_HDR_SIZE);
> + struct in6_addr src_ip;
> +
> + switch (icmp->icmp6_type) {
> + case IPV6_ICMP_ECHO_REPLY:
> + src_ip = ip6->saddr;
> + if (memcmp(&net_ping_ip6, &src_ip, sizeof(struct in6_addr)) != 0)
> + return;
> + net_set_state(NETLOOP_SUCCESS);
> + break;
> + case IPV6_ICMP_ECHO_REQUEST:
> + debug("Got ICMPv6 ECHO REQUEST from %pI6c\n", &ip6->saddr);
> + /* ignore for now.... */
> + break;
> + default:
> + debug("Unexpected ICMPv6 type 0x%x\n", icmp->icmp6_type);
> + }
> +}
> --
> 2.5.3
>
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