diff options
Diffstat (limited to 'net/ifup.c')
| -rw-r--r-- | net/ifup.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/net/ifup.c b/net/ifup.c new file mode 100644 index 0000000000..3b89ce1bc2 --- /dev/null +++ b/net/ifup.c @@ -0,0 +1,179 @@ +/* + * ifup.c - bring up network interfaces + * + * Copyright (c) 2014 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more detaiifup. + * + */ +#define pr_fmt(fmt) "ifup: " fmt + +#include <environment.h> +#include <command.h> +#include <common.h> +#include <getopt.h> +#include <net.h> +#include <fs.h> +#include <linux/stat.h> + +static char *vars[] = { + "ipaddr", + "netmask", + "gateway", + "serverip", + "ethaddr", +}; + +static int eth_set_param(struct device_d *dev, const char *param) +{ + const char *value = getenv(param); + + if (!value) + return 0; + if (!*value) + return 0; + + return dev_set_param(dev, param, value); +} + +int ifup(const char *name, unsigned flags) +{ + int ret; + char *cmd, *cmd_discover; + const char *ip; + struct stat s; + int i; + struct device_d *dev; + struct eth_device *edev = eth_get_byname(name); + + if (edev && edev->ipaddr && !(flags & IFUP_FLAG_FORCE)) + return 0; + + env_push_context(); + + setenv("ip", ""); + + for (i = 0; i < ARRAY_SIZE(vars); i++) + setenv(vars[i], ""); + + cmd = asprintf("source /env/network/%s", name); + cmd_discover = asprintf("/env/network/%s-discover", name); + + ret = run_command(cmd); + if (ret) + goto out; + + ret = stat(cmd_discover, &s); + if (!ret) { + ret = run_command(cmd_discover); + if (ret) + goto out; + } + + dev = get_device_by_name(name); + if (!dev) { + pr_err("Cannot find device %s\n", name); + goto out; + } + + ret = eth_set_param(dev, "ethaddr"); + if (ret) + goto out; + + ip = getenv("ip"); + if (!strcmp(ip, "dhcp")) { + ret = run_command("dhcp"); + if (ret) + goto out; + } else if (!strcmp(ip, "static")) { + for (i = 0; i < ARRAY_SIZE(vars); i++) { + ret = eth_set_param(dev, vars[i]); + if (ret) + goto out; + } + } else { + pr_err("unknown ip type: %s\n", ip); + ret = -EINVAL; + goto out; + } + + ret = 0; +out: + env_pop_context(); + free(cmd); + free(cmd_discover); + + return ret; +} + +int ifup_all(unsigned flags) +{ + DIR *dir; + struct dirent *d; + + dir = opendir("/env/network"); + if (!dir) + return -ENOENT; + + while ((d = readdir(dir))) { + if (*d->d_name == '.') + continue; + ifup(d->d_name, flags); + } + + closedir(dir); + + return 0; +} + +#if IS_ENABLED(CONFIG_NET_CMD_IFUP) + +static int do_ifup(int argc, char *argv[]) +{ + int opt; + unsigned flags = 0; + int all = 0; + + while ((opt = getopt(argc, argv, "af")) > 0) { + switch (opt) { + case 'f': + flags |= IFUP_FLAG_FORCE; + break; + case 'a': + all = 1; + break; + } + } + + if (all) + return ifup_all(flags); + + if (argc == optind) + return COMMAND_ERROR_USAGE; + + return ifup(argv[optind], flags); +} + +BAREBOX_CMD_HELP_START(ifup) +BAREBOX_CMD_HELP_USAGE("ifup [OPTIONS] <interface>\n") +BAREBOX_CMD_HELP_OPT ("-a", "bring up all interfaces\n") +BAREBOX_CMD_HELP_OPT ("-f", "Force. Configure even if ip already set\n") +BAREBOX_CMD_HELP_END + +BAREBOX_CMD_START(ifup) + .cmd = do_ifup, + .usage = "Bring up network interfaces", + BAREBOX_CMD_HELP(cmd_ifup_help) +BAREBOX_CMD_END + +#endif |