On Wed, Mar 12, 2025 at 02:45:36PM +0100, Oleksij Rempel wrote:
> This patch introduces the `ip` command, providing functionality similar
> to Linux’s `ip` tool, catering to users with strong Linux muscle memory.
> It supports:
>
> - `ip l` / `ip link` - Show network interfaces (state, MAC address)
> - `ip a` / `ip addr` - Show assigned IP addresses and netmasks
> - `ip r` / `ip route` - Show routing table, including default gateway,
> interface-specific routes, DNS, and server IP.
>
> Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
> ---
> commands/Kconfig | 9 +++
> commands/Makefile | 1 +
> commands/ip.c | 157 ++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 167 insertions(+)
> create mode 100644 commands/ip.c
>
> diff --git a/commands/Kconfig b/commands/Kconfig
> index e41625e294c9..528b30b8fc90 100644
> --- a/commands/Kconfig
> +++ b/commands/Kconfig
> @@ -1397,6 +1397,15 @@ config CMD_TFTP
> Options:
> -p push to TFTP server
>
> +config CMD_IP
> + tristate
> + prompt "ip"
> + default y
> + help
> + This command provides information about network interfaces, similar
> + to the Linux `ip addr show` command. It lists interface names, states
> + (UP/DOWN), MAC addresses, and assigned IP addresses.
Whitespace damage before "This..."
> +
> config CMD_IP_ROUTE_GET
> tristate
> prompt "ip-route-get"
> diff --git a/commands/Makefile b/commands/Makefile
> index e152e4148b04..c202cdef5703 100644
> --- a/commands/Makefile
> +++ b/commands/Makefile
> @@ -146,6 +146,7 @@ obj-$(CONFIG_CMD_MMC) += mmc.o
> obj-$(CONFIG_CMD_MMC_EXTCSD) += mmc_extcsd.o
> obj-$(CONFIG_CMD_NAND_BITFLIP) += nand-bitflip.o
> obj-$(CONFIG_CMD_SEED) += seed.o
> +obj-$(CONFIG_CMD_IP) += ip.o
> obj-$(CONFIG_CMD_IP_ROUTE_GET) += ip-route-get.o
> obj-$(CONFIG_CMD_BTHREAD) += bthread.o
> obj-$(CONFIG_CMD_UBSAN) += ubsan.o
> diff --git a/commands/ip.c b/commands/ip.c
> new file mode 100644
> index 000000000000..35fc5f4d300f
> --- /dev/null
> +++ b/commands/ip.c
> @@ -0,0 +1,157 @@
SPDX?
> +#include <common.h>
> +#include <command.h>
> +#include <net.h>
> +#include <linux/list.h>
> +#include <complete.h>
> +
> +/* Function to calculate CIDR prefix from netmask */
> +static int netmask_to_prefix(IPaddr_t netmask)
> +{
> + int prefix = 0;
> +
> + while (netmask) {
> + prefix += netmask & 1;
> + netmask >>= 1;
> + }
> +
> + return prefix;
> +}
> +
> +/* Function to display network links (`ip l`) */
> +static int do_ip_link(int argc, char *argv[])
> +{
> + struct eth_device *edev;
> +
> + for_each_netdev(edev) {
> + const char *phy_status = edev->phydev ?
> + (edev->phydev->link ? ",LOWER_UP" : ",NO-CARRIER") : "";
> +
> + printf("%s: <%s%s>\n",
> + eth_name(edev),
> + edev->active ? "UP" : "DOWN",
> + phy_status);
> +
> + printf(" link/ether %pM brd ff:ff:ff:ff:ff:ff\n",
> + edev->ethaddr);
> + }
> +
> + return 0;
> +}
> +
> +/* Function to display network addresses (`ip a`) */
> +static int do_ip_addr(int argc, char *argv[])
> +{
> + struct eth_device *edev;
> +
> + for_each_netdev(edev) {
> + IPaddr_t ipaddr = net_get_ip(edev);
> + int prefix_length = netmask_to_prefix(edev->netmask);
> + const char *phy_status = edev->phydev ?
> + (edev->phydev->link ? ",LOWER_UP" : ",NO-CARRIER") : "";
> +
> + printf("%s: <%s%s>\n", eth_name(edev),
> + edev->active ? "UP" : "DOWN", phy_status);
> +
> + printf(" link/ether %pM brd ff:ff:ff:ff:ff:ff\n",
> + edev->ethaddr);
> +
> + if (ipaddr) {
> + printf(" inet %pI4/%d scope global src %pI4\n",
> + &ipaddr, prefix_length, &ipaddr);
> + }
> + }
> +
> + return 0;
> +}
> +
> +/* Function to display network routes (`ip r`) */
> +static int do_ip_route(int argc, char *argv[])
> +{
> + const char *domainname = net_get_domainname();
> + IPaddr_t nameserver = net_get_nameserver();
> + const char *serverip = net_get_server();
> + IPaddr_t gateway = net_get_gateway();
> + struct eth_device *edev;
> +
> + for_each_netdev(edev) {
> + int prefix_length = netmask_to_prefix(edev->netmask);
> + IPaddr_t ipaddr = net_get_ip(edev);
> + const char *proto;
> +
> + /* Skip interfaces without an IP address */
> + if (!ipaddr)
> + continue;
> +
> + /* Determine protocol: DHCP or Static */
> + if (edev->global_mode == ETH_MODE_DHCP)
> + proto = "dhcp";
> + else
> + proto = "static";
> +
> + /* Show default gateway */
> + if (gateway) {
> + printf("default via %pI4 dev %s proto %s src %pI4\n",
> + &gateway, eth_name(edev), proto, &ipaddr);
> + }
> +
> + /* Show per-interface network route */
> + if (prefix_length > 0) {
> + printf("%pI4/%d dev %s proto kernel scope link src %pI4\n",
> + &ipaddr, prefix_length, eth_name(edev),
> + &ipaddr);
> + }
> + }
> +
> + /* Show boot server */
> + if (serverip && *serverip) {
> + printf("serverip %s\n", serverip);
> + }
> +
> + /* Show DNS server */
> + if (nameserver) {
> + printf("nameserver %pI4\n", &nameserver);
> + }
> +
> + /* Show search domain */
> + if (domainname && *domainname) {
> + printf("search %s\n", domainname);
> + }
> +
> + return 0;
> +}
> +
> +/* Main IP command dispatcher */
> +static int do_ip(int argc, char *argv[])
> +{
> + if (argc < 2) {
> + return do_ip_addr(argc, argv); /* Default: `ip a` */
> + }
> +
> + if (!strcmp(argv[1], "l") || !strcmp(argv[1], "link"))
> + return do_ip_link(argc, argv);
> + else if (!strcmp(argv[1], "a") || !strcmp(argv[1], "addr"))
> + return do_ip_addr(argc, argv);
> + else if (!strcmp(argv[1], "r") || !strcmp(argv[1], "route"))
> + return do_ip_route(argc, argv);
The Linux ip tool not only accepts "l" and "link", but also "li" and "lin",
so maybe something like strncmp(argv[1], "link", strlen(argv[1]))?
> +
> + printf("Usage: ip [l|link] | [a|addr] | [r|route]\n");
> + return 1;
return COMMAND_ERROR_USAGE instead?
Sascha
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
