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drivers: eth: native_posix: if_name from cmd line

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Iface name which is used by native posix ethernet driver can only be
specified at compile-time. I wanted to run two instances of the same
program on native posix but did not want to make two separate builds only
to change the iface name. I have implemented getting the iface name from
command line.

Signed-off-by: Kacper Dalach <dalachowsky@gmail.com>
This commit is contained in:
Kacper Dalach 2024-06-25 13:29:10 +02:00 • committed by Anas Nashif
commit 52197b515a
2 changed files with 41 additions and 0 deletions
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14
doc/connectivity/networking/native_sim_setup.rst
View file

@ -142,3 +142,17 @@ For TCP test, type:
.. code-block:: console
./echo-client -t 127.0.0.1
Setting interface name from command line
****************************************
By default the Ethernet interface name used by native_sim is determined by
:kconfig:option:`CONFIG_ETH_NATIVE_POSIX_DRV_NAME`, but is also possible
to set it from the command line using ``--eth-if=<interface_name>``.
This can be useful if the application has to be
run in multiple instances and recompiling it for each instance would be
troublesome.
.. code-block:: console
./zephyr.exe --eth-if=zeth2

27
drivers/ethernet/eth_native_posix.c
View file

@ -23,6 +23,8 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME);
#include <stdbool.h>
#include <errno.h>
#include <stddef.h>
#include <cmdline.h>
#include <posix_native_task.h>
#include <zephyr/net/net_pkt.h>
#include <zephyr/net/net_core.h>
@ -69,6 +71,8 @@ struct eth_context {
#endif
};
static const char *if_name_cmd_opt;
#define DEFINE_RX_THREAD(x, _) \
K_KERNEL_STACK_DEFINE(rx_thread_stack_##x, \
CONFIG_ARCH_POSIX_RECOMMENDED_STACK_SIZE);\
@ -343,6 +347,10 @@ static void eth_iface_init(struct net_if *iface)
ctx->if_name = CONFIG_ETH_NATIVE_POSIX_DRV_NAME;
}
if (if_name_cmd_opt != NULL) {
ctx->if_name = if_name_cmd_opt;
}
LOG_DBG("Interface %p using \"%s\"", iface, ctx->if_name);
net_if_set_link_addr(iface, ll_addr->addr, ll_addr->len,
@ -587,3 +595,22 @@ LISTIFY(CONFIG_ETH_NATIVE_POSIX_INTERFACE_COUNT, PTP_INIT_FUNC, (), _)
LISTIFY(CONFIG_ETH_NATIVE_POSIX_INTERFACE_COUNT, DEFINE_PTP_DEVICE, (;), _);
#endif /* CONFIG_ETH_NATIVE_POSIX_PTP_CLOCK */
static void add_native_posix_options(void)
{
static struct args_struct_t eth_native_posix_options[] = {
{
.is_mandatory = false,
.option = "eth-if",
.name = "name",
.type = 's',
.dest = (void *)&if_name_cmd_opt,
.descript = "Name of the eth interface to use",
},
ARG_TABLE_ENDMARKER,
};
native_add_command_line_opts(eth_native_posix_options);
}
NATIVE_TASK(add_native_posix_options, PRE_BOOT_1, 10);