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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | // SPDX-License-Identifier: GPL-2.0+ /* Copyright (C) 2024 Linaro Ltd. */ #include <command.h> #include <console.h> #include <env.h> #include <log.h> #include <dm/device.h> #include <linux/delay.h> #include <linux/errno.h> #include <lwip/apps/sntp.h> #include <lwip/dhcp.h> #include <lwip/dns.h> #include <lwip/timeouts.h> #include <net.h> #include <time.h> #define DHCP_TIMEOUT_MS 10000 #ifdef CONFIG_CMD_TFTPBOOT /* Boot file obtained from DHCP (if present) */ static char boot_file_name[DHCP_BOOT_FILE_LEN]; #endif static void call_lwip_dhcp_fine_tmr(void *ctx) { dhcp_fine_tmr(); sys_timeout(10, call_lwip_dhcp_fine_tmr, NULL); } static int dhcp_loop(struct udevice *udev) { char ipstr[] = "ipaddr\0\0"; char maskstr[] = "netmask\0\0"; char gwstr[] = "gatewayip\0\0"; const ip_addr_t *ntpserverip; unsigned long start; struct netif *netif; struct dhcp *dhcp; bool bound; int idx; idx = dev_seq(udev); if (idx < 0 || idx > 99) { log_err("unexpected idx %d\n", idx); return CMD_RET_FAILURE; } netif = net_lwip_new_netif_noip(udev); if (!netif) return CMD_RET_FAILURE; /* * Request the DHCP stack to parse and store the NTP servers for * eventual use by the SNTP command */ if (CONFIG_IS_ENABLED(CMD_SNTP)) sntp_servermode_dhcp(1); start = get_timer(0); if (dhcp_start(netif)) return CMD_RET_FAILURE; call_lwip_dhcp_fine_tmr(NULL); /* Wait for DHCP to complete */ do { net_lwip_rx(udev, netif); bound = dhcp_supplied_address(netif); if (bound) break; if (ctrlc()) { printf("Abort\n"); break; } mdelay(1); } while (get_timer(start) < DHCP_TIMEOUT_MS); sys_untimeout(call_lwip_dhcp_fine_tmr, NULL); if (!bound) { net_lwip_remove_netif(netif); return CMD_RET_FAILURE; } dhcp = netif_dhcp_data(netif); env_set("bootfile", dhcp->boot_file_name); if (idx > 0) { sprintf(ipstr, "ipaddr%d", idx); sprintf(maskstr, "netmask%d", idx); sprintf(gwstr, "gatewayip%d", idx); } else { net_ip.s_addr = dhcp->offered_ip_addr.addr; } env_set(ipstr, ip4addr_ntoa(&dhcp->offered_ip_addr)); env_set(maskstr, ip4addr_ntoa(&dhcp->offered_sn_mask)); env_set("serverip", ip4addr_ntoa(&dhcp->server_ip_addr)); if (dhcp->offered_gw_addr.addr != 0) env_set(gwstr, ip4addr_ntoa(&dhcp->offered_gw_addr)); #ifdef CONFIG_PROT_DNS_LWIP env_set("dnsip", ip4addr_ntoa(dns_getserver(0))); env_set("dnsip2", ip4addr_ntoa(dns_getserver(1))); #endif #ifdef CONFIG_CMD_TFTPBOOT if (dhcp->boot_file_name[0] != '\0') strncpy(boot_file_name, dhcp->boot_file_name, sizeof(boot_file_name)); #endif if (CONFIG_IS_ENABLED(CMD_SNTP)) { ntpserverip = sntp_getserver(1); if (ntpserverip != IP_ADDR_ANY) env_set("ntpserverip", ip4addr_ntoa(ntpserverip)); } printf("DHCP client bound to address %pI4 (%lu ms)\n", &dhcp->offered_ip_addr, get_timer(start)); net_lwip_remove_netif(netif); return CMD_RET_SUCCESS; } int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { int ret; struct udevice *dev; if (net_lwip_eth_start() < 0) return CMD_RET_FAILURE; dev = eth_get_dev(); if (!dev) { log_err("No network device\n"); return CMD_RET_FAILURE; } ret = dhcp_loop(dev); if (ret) return ret; if (argc > 1) { struct cmd_tbl cmdtp = {}; return do_tftpb(&cmdtp, 0, argc, argv); } return CMD_RET_SUCCESS; } |