mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 15:23:07 +00:00
c05ed00afb
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
1120 lines
27 KiB
C
1120 lines
27 KiB
C
/*
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* Based on LiMon - BOOTP.
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*
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* Copyright 1994, 1995, 2000 Neil Russell.
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* (See License)
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* Copyright 2000 Roland Borde
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* Copyright 2000 Paolo Scaffardi
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* Copyright 2000-2004 Wolfgang Denk, wd@denx.de
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*/
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#include <common.h>
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#include <bootstage.h>
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#include <command.h>
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#include <env.h>
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#include <efi_loader.h>
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#include <log.h>
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#include <net.h>
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#include <rand.h>
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#include <uuid.h>
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#include <linux/delay.h>
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#include <net/tftp.h>
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#include "bootp.h"
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#ifdef CONFIG_LED_STATUS
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#include <status_led.h>
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#endif
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#ifdef CONFIG_BOOTP_RANDOM_DELAY
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#include "net_rand.h"
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#endif
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#define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
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/*
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* The timeout for the initial BOOTP/DHCP request used to be described by a
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* counter of fixed-length timeout periods. TIMEOUT_COUNT represents
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* that counter
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*
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* Now that the timeout periods are variable (exponential backoff and retry)
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* we convert the timeout count to the absolute time it would have take to
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* execute that many retries, and keep sending retry packets until that time
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* is reached.
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*/
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#ifndef CONFIG_NET_RETRY_COUNT
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# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
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#else
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# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
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#endif
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#define TIMEOUT_MS ((3 + (TIMEOUT_COUNT * 5)) * 1000)
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#define PORT_BOOTPS 67 /* BOOTP server UDP port */
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#define PORT_BOOTPC 68 /* BOOTP client UDP port */
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#ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
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#define CONFIG_DHCP_MIN_EXT_LEN 64
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#endif
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#ifndef CONFIG_BOOTP_ID_CACHE_SIZE
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#define CONFIG_BOOTP_ID_CACHE_SIZE 4
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#endif
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u32 bootp_ids[CONFIG_BOOTP_ID_CACHE_SIZE];
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unsigned int bootp_num_ids;
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int bootp_try;
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ulong bootp_start;
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ulong bootp_timeout;
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char net_nis_domain[32] = {0,}; /* Our NIS domain */
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char net_hostname[32] = {0,}; /* Our hostname */
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char net_root_path[64] = {0,}; /* Our bootpath */
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static ulong time_taken_max;
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#if defined(CONFIG_CMD_DHCP)
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static dhcp_state_t dhcp_state = INIT;
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static u32 dhcp_leasetime;
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static struct in_addr dhcp_server_ip;
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static u8 dhcp_option_overload;
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#define OVERLOAD_FILE 1
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#define OVERLOAD_SNAME 2
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static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
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unsigned src, unsigned len);
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/* For Debug */
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#if 0
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static char *dhcpmsg2str(int type)
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{
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switch (type) {
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case 1: return "DHCPDISCOVER"; break;
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case 2: return "DHCPOFFER"; break;
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case 3: return "DHCPREQUEST"; break;
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case 4: return "DHCPDECLINE"; break;
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case 5: return "DHCPACK"; break;
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case 6: return "DHCPNACK"; break;
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case 7: return "DHCPRELEASE"; break;
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default: return "UNKNOWN/INVALID MSG TYPE"; break;
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}
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}
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#endif
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#endif
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static void bootp_add_id(ulong id)
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{
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if (bootp_num_ids >= ARRAY_SIZE(bootp_ids)) {
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size_t size = sizeof(bootp_ids) - sizeof(id);
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memmove(bootp_ids, &bootp_ids[1], size);
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bootp_ids[bootp_num_ids - 1] = id;
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} else {
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bootp_ids[bootp_num_ids] = id;
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bootp_num_ids++;
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}
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}
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static bool bootp_match_id(ulong id)
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{
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unsigned int i;
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for (i = 0; i < bootp_num_ids; i++)
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if (bootp_ids[i] == id)
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return true;
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return false;
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}
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static int check_reply_packet(uchar *pkt, unsigned dest, unsigned src,
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unsigned len)
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{
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struct bootp_hdr *bp = (struct bootp_hdr *)pkt;
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int retval = 0;
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if (dest != PORT_BOOTPC || src != PORT_BOOTPS)
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retval = -1;
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else if (len < sizeof(struct bootp_hdr) - OPT_FIELD_SIZE)
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retval = -2;
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else if (bp->bp_op != OP_BOOTREPLY)
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retval = -3;
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else if (bp->bp_htype != HWT_ETHER)
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retval = -4;
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else if (bp->bp_hlen != HWL_ETHER)
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retval = -5;
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else if (!bootp_match_id(net_read_u32(&bp->bp_id)))
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retval = -6;
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else if (memcmp(bp->bp_chaddr, net_ethaddr, HWL_ETHER) != 0)
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retval = -7;
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debug("Filtering pkt = %d\n", retval);
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return retval;
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}
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/*
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* Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
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*/
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static void store_net_params(struct bootp_hdr *bp)
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{
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#if !defined(CONFIG_BOOTP_SERVERIP)
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struct in_addr tmp_ip;
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bool overwrite_serverip = true;
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#if defined(CONFIG_BOOTP_PREFER_SERVERIP)
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overwrite_serverip = false;
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#endif
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net_copy_ip(&tmp_ip, &bp->bp_siaddr);
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if (tmp_ip.s_addr != 0 && (overwrite_serverip || !net_server_ip.s_addr))
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net_copy_ip(&net_server_ip, &bp->bp_siaddr);
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memcpy(net_server_ethaddr,
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((struct ethernet_hdr *)net_rx_packet)->et_src, 6);
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if (
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#if defined(CONFIG_CMD_DHCP)
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!(dhcp_option_overload & OVERLOAD_FILE) &&
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#endif
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(strlen(bp->bp_file) > 0) &&
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!net_boot_file_name_explicit) {
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copy_filename(net_boot_file_name, bp->bp_file,
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sizeof(net_boot_file_name));
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}
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debug("net_boot_file_name: %s\n", net_boot_file_name);
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/* Propagate to environment:
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* don't delete exising entry when BOOTP / DHCP reply does
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* not contain a new value
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*/
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if (*net_boot_file_name)
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env_set("bootfile", net_boot_file_name);
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#endif
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net_copy_ip(&net_ip, &bp->bp_yiaddr);
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}
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static int truncate_sz(const char *name, int maxlen, int curlen)
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{
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if (curlen >= maxlen) {
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printf("*** WARNING: %s is too long (%d - max: %d)"
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" - truncated\n", name, curlen, maxlen);
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curlen = maxlen - 1;
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}
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return curlen;
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}
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#if !defined(CONFIG_CMD_DHCP)
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static void bootp_process_vendor_field(u8 *ext)
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{
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int size = *(ext + 1);
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debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext,
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*(ext + 1));
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net_boot_file_expected_size_in_blocks = 0;
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switch (*ext) {
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/* Fixed length fields */
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case 1: /* Subnet mask */
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if (net_netmask.s_addr == 0)
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net_copy_ip(&net_netmask, (struct in_addr *)(ext + 2));
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break;
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case 2: /* Time offset - Not yet supported */
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break;
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/* Variable length fields */
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case 3: /* Gateways list */
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if (net_gateway.s_addr == 0)
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net_copy_ip(&net_gateway, (struct in_addr *)(ext + 2));
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break;
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case 4: /* Time server - Not yet supported */
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break;
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case 5: /* IEN-116 name server - Not yet supported */
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break;
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case 6:
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if (net_dns_server.s_addr == 0)
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net_copy_ip(&net_dns_server,
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(struct in_addr *)(ext + 2));
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#if defined(CONFIG_BOOTP_DNS2)
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if ((net_dns_server2.s_addr == 0) && (size > 4))
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net_copy_ip(&net_dns_server2,
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(struct in_addr *)(ext + 2 + 4));
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#endif
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break;
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case 7: /* Log server - Not yet supported */
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break;
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case 8: /* Cookie/Quote server - Not yet supported */
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break;
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case 9: /* LPR server - Not yet supported */
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break;
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case 10: /* Impress server - Not yet supported */
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break;
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case 11: /* RPL server - Not yet supported */
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break;
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case 12: /* Host name */
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if (net_hostname[0] == 0) {
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size = truncate_sz("Host Name",
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sizeof(net_hostname), size);
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memcpy(&net_hostname, ext + 2, size);
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net_hostname[size] = 0;
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}
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break;
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case 13: /* Boot file size */
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if (size == 2)
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net_boot_file_expected_size_in_blocks =
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ntohs(*(ushort *)(ext + 2));
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else if (size == 4)
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net_boot_file_expected_size_in_blocks =
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ntohl(*(ulong *)(ext + 2));
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break;
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case 14: /* Merit dump file - Not yet supported */
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break;
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case 15: /* Domain name - Not yet supported */
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break;
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case 16: /* Swap server - Not yet supported */
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break;
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case 17: /* Root path */
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if (net_root_path[0] == 0) {
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size = truncate_sz("Root Path",
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sizeof(net_root_path), size);
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memcpy(&net_root_path, ext + 2, size);
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net_root_path[size] = 0;
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}
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break;
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case 18: /* Extension path - Not yet supported */
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/*
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* This can be used to send the information of the
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* vendor area in another file that the client can
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* access via TFTP.
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*/
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break;
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/* IP host layer fields */
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case 40: /* NIS Domain name */
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if (net_nis_domain[0] == 0) {
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size = truncate_sz("NIS Domain Name",
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sizeof(net_nis_domain), size);
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memcpy(&net_nis_domain, ext + 2, size);
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net_nis_domain[size] = 0;
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}
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break;
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#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
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case 42: /* NTP server IP */
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net_copy_ip(&net_ntp_server, (struct in_addr *)(ext + 2));
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break;
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#endif
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/* Application layer fields */
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case 43: /* Vendor specific info - Not yet supported */
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/*
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* Binary information to exchange specific
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* product information.
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*/
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break;
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/* Reserved (custom) fields (128..254) */
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}
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}
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static void bootp_process_vendor(u8 *ext, int size)
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{
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u8 *end = ext + size;
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debug("[BOOTP] Checking extension (%d bytes)...\n", size);
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while ((ext < end) && (*ext != 0xff)) {
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if (*ext == 0) {
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ext++;
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} else {
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u8 *opt = ext;
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ext += ext[1] + 2;
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if (ext <= end)
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bootp_process_vendor_field(opt);
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}
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}
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debug("[BOOTP] Received fields:\n");
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if (net_netmask.s_addr)
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debug("net_netmask : %pI4\n", &net_netmask);
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if (net_gateway.s_addr)
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debug("net_gateway : %pI4", &net_gateway);
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if (net_boot_file_expected_size_in_blocks)
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debug("net_boot_file_expected_size_in_blocks : %d\n",
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net_boot_file_expected_size_in_blocks);
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if (net_hostname[0])
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debug("net_hostname : %s\n", net_hostname);
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if (net_root_path[0])
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debug("net_root_path : %s\n", net_root_path);
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if (net_nis_domain[0])
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debug("net_nis_domain : %s\n", net_nis_domain);
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#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
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if (net_ntp_server.s_addr)
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debug("net_ntp_server : %pI4\n", &net_ntp_server);
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#endif
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}
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/*
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* Handle a BOOTP received packet.
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*/
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static void bootp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
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unsigned src, unsigned len)
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{
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struct bootp_hdr *bp;
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debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
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src, dest, len, sizeof(struct bootp_hdr));
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bp = (struct bootp_hdr *)pkt;
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/* Filter out pkts we don't want */
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if (check_reply_packet(pkt, dest, src, len))
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return;
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/*
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* Got a good BOOTP reply. Copy the data into our variables.
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*/
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#if defined(CONFIG_LED_STATUS) && defined(CONFIG_LED_STATUS_BOOT_ENABLE)
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status_led_set(CONFIG_LED_STATUS_BOOT, CONFIG_LED_STATUS_OFF);
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#endif
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store_net_params(bp); /* Store net parameters from reply */
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/* Retrieve extended information (we must parse the vendor area) */
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if (net_read_u32((u32 *)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
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bootp_process_vendor((uchar *)&bp->bp_vend[4], len);
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net_set_timeout_handler(0, (thand_f *)0);
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bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, "bootp_stop");
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debug("Got good BOOTP\n");
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net_auto_load();
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}
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#endif
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/*
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* Timeout on BOOTP/DHCP request.
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*/
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static void bootp_timeout_handler(void)
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{
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ulong time_taken = get_timer(bootp_start);
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if (time_taken >= time_taken_max) {
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#ifdef CONFIG_BOOTP_MAY_FAIL
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char *ethrotate;
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ethrotate = env_get("ethrotate");
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if ((ethrotate && strcmp(ethrotate, "no") == 0) ||
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net_restart_wrap) {
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puts("\nRetry time exceeded\n");
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net_set_state(NETLOOP_FAIL);
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} else
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#endif
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{
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puts("\nRetry time exceeded; starting again\n");
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net_start_again();
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}
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} else {
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bootp_timeout *= 2;
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if (bootp_timeout > 2000)
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bootp_timeout = 2000;
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net_set_timeout_handler(bootp_timeout, bootp_timeout_handler);
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bootp_request();
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}
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}
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#define put_vci(e, str) \
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do { \
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size_t vci_strlen = strlen(str); \
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*e++ = 60; /* Vendor Class Identifier */ \
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*e++ = vci_strlen; \
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memcpy(e, str, vci_strlen); \
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e += vci_strlen; \
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} while (0)
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static u8 *add_vci(u8 *e)
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{
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char *vci = NULL;
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char *env_vci = env_get("bootp_vci");
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#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)
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vci = CONFIG_SPL_NET_VCI_STRING;
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#elif defined(CONFIG_BOOTP_VCI_STRING)
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vci = CONFIG_BOOTP_VCI_STRING;
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#endif
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if (env_vci)
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vci = env_vci;
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if (vci)
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put_vci(e, vci);
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return e;
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}
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/*
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* Initialize BOOTP extension fields in the request.
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*/
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#if defined(CONFIG_CMD_DHCP)
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static int dhcp_extended(u8 *e, int message_type, struct in_addr server_ip,
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struct in_addr requested_ip)
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{
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u8 *start = e;
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u8 *cnt;
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#ifdef CONFIG_LIB_UUID
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char *uuid;
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#endif
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int clientarch = -1;
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#if defined(CONFIG_BOOTP_VENDOREX)
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u8 *x;
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#endif
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#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
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char *hostname;
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#endif
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*e++ = 99; /* RFC1048 Magic Cookie */
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*e++ = 130;
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*e++ = 83;
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*e++ = 99;
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*e++ = 53; /* DHCP Message Type */
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*e++ = 1;
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*e++ = message_type;
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*e++ = 57; /* Maximum DHCP Message Size */
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*e++ = 2;
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*e++ = (576 - 312 + OPT_FIELD_SIZE) >> 8;
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*e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
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if (server_ip.s_addr) {
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int tmp = ntohl(server_ip.s_addr);
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*e++ = 54; /* ServerID */
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*e++ = 4;
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*e++ = tmp >> 24;
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*e++ = tmp >> 16;
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*e++ = tmp >> 8;
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*e++ = tmp & 0xff;
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}
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if (requested_ip.s_addr) {
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int tmp = ntohl(requested_ip.s_addr);
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*e++ = 50; /* Requested IP */
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*e++ = 4;
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*e++ = tmp >> 24;
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*e++ = tmp >> 16;
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*e++ = tmp >> 8;
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*e++ = tmp & 0xff;
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}
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#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
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hostname = env_get("hostname");
|
|
if (hostname) {
|
|
int hostnamelen = strlen(hostname);
|
|
|
|
*e++ = 12; /* Hostname */
|
|
*e++ = hostnamelen;
|
|
memcpy(e, hostname, hostnamelen);
|
|
e += hostnamelen;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_BOOTP_PXE_CLIENTARCH
|
|
clientarch = CONFIG_BOOTP_PXE_CLIENTARCH;
|
|
#endif
|
|
|
|
if (env_get("bootp_arch"))
|
|
clientarch = env_get_ulong("bootp_arch", 16, clientarch);
|
|
|
|
if (clientarch > 0) {
|
|
*e++ = 93; /* Client System Architecture */
|
|
*e++ = 2;
|
|
*e++ = (clientarch >> 8) & 0xff;
|
|
*e++ = clientarch & 0xff;
|
|
}
|
|
|
|
*e++ = 94; /* Client Network Interface Identifier */
|
|
*e++ = 3;
|
|
*e++ = 1; /* type field for UNDI */
|
|
*e++ = 0; /* major revision */
|
|
*e++ = 0; /* minor revision */
|
|
|
|
#ifdef CONFIG_LIB_UUID
|
|
uuid = env_get("pxeuuid");
|
|
|
|
if (uuid) {
|
|
if (uuid_str_valid(uuid)) {
|
|
*e++ = 97; /* Client Machine Identifier */
|
|
*e++ = 17;
|
|
*e++ = 0; /* type 0 - UUID */
|
|
|
|
uuid_str_to_bin(uuid, e, UUID_STR_FORMAT_STD);
|
|
e += 16;
|
|
} else {
|
|
printf("Invalid pxeuuid: %s\n", uuid);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
e = add_vci(e);
|
|
|
|
#if defined(CONFIG_BOOTP_VENDOREX)
|
|
x = dhcp_vendorex_prep(e);
|
|
if (x)
|
|
return x - start;
|
|
#endif
|
|
|
|
*e++ = 55; /* Parameter Request List */
|
|
cnt = e++; /* Pointer to count of requested items */
|
|
*cnt = 0;
|
|
#if defined(CONFIG_BOOTP_SUBNETMASK)
|
|
*e++ = 1; /* Subnet Mask */
|
|
*cnt += 1;
|
|
#endif
|
|
#if defined(CONFIG_BOOTP_TIMEOFFSET)
|
|
*e++ = 2;
|
|
*cnt += 1;
|
|
#endif
|
|
#if defined(CONFIG_BOOTP_GATEWAY)
|
|
*e++ = 3; /* Router Option */
|
|
*cnt += 1;
|
|
#endif
|
|
#if defined(CONFIG_BOOTP_DNS)
|
|
*e++ = 6; /* DNS Server(s) */
|
|
*cnt += 1;
|
|
#endif
|
|
#if defined(CONFIG_BOOTP_HOSTNAME)
|
|
*e++ = 12; /* Hostname */
|
|
*cnt += 1;
|
|
#endif
|
|
#if defined(CONFIG_BOOTP_BOOTFILESIZE)
|
|
*e++ = 13; /* Boot File Size */
|
|
*cnt += 1;
|
|
#endif
|
|
#if defined(CONFIG_BOOTP_BOOTPATH)
|
|
*e++ = 17; /* Boot path */
|
|
*cnt += 1;
|
|
#endif
|
|
#if defined(CONFIG_BOOTP_NISDOMAIN)
|
|
*e++ = 40; /* NIS Domain name request */
|
|
*cnt += 1;
|
|
#endif
|
|
#if defined(CONFIG_BOOTP_NTPSERVER)
|
|
*e++ = 42;
|
|
*cnt += 1;
|
|
#endif
|
|
/* no options, so back up to avoid sending an empty request list */
|
|
if (*cnt == 0)
|
|
e -= 2;
|
|
|
|
*e++ = 255; /* End of the list */
|
|
|
|
/* Pad to minimal length */
|
|
#ifdef CONFIG_DHCP_MIN_EXT_LEN
|
|
while ((e - start) < CONFIG_DHCP_MIN_EXT_LEN)
|
|
*e++ = 0;
|
|
#endif
|
|
|
|
return e - start;
|
|
}
|
|
|
|
#else
|
|
/*
|
|
* Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
|
|
*/
|
|
static int bootp_extended(u8 *e)
|
|
{
|
|
u8 *start = e;
|
|
|
|
*e++ = 99; /* RFC1048 Magic Cookie */
|
|
*e++ = 130;
|
|
*e++ = 83;
|
|
*e++ = 99;
|
|
|
|
#if defined(CONFIG_CMD_DHCP)
|
|
*e++ = 53; /* DHCP Message Type */
|
|
*e++ = 1;
|
|
*e++ = DHCP_DISCOVER;
|
|
|
|
*e++ = 57; /* Maximum DHCP Message Size */
|
|
*e++ = 2;
|
|
*e++ = (576 - 312 + OPT_FIELD_SIZE) >> 16;
|
|
*e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
|
|
#endif
|
|
|
|
add_vci(e);
|
|
|
|
#if defined(CONFIG_BOOTP_SUBNETMASK)
|
|
*e++ = 1; /* Subnet mask request */
|
|
*e++ = 4;
|
|
e += 4;
|
|
#endif
|
|
|
|
#if defined(CONFIG_BOOTP_GATEWAY)
|
|
*e++ = 3; /* Default gateway request */
|
|
*e++ = 4;
|
|
e += 4;
|
|
#endif
|
|
|
|
#if defined(CONFIG_BOOTP_DNS)
|
|
*e++ = 6; /* Domain Name Server */
|
|
*e++ = 4;
|
|
e += 4;
|
|
#endif
|
|
|
|
#if defined(CONFIG_BOOTP_HOSTNAME)
|
|
*e++ = 12; /* Host name request */
|
|
*e++ = 32;
|
|
e += 32;
|
|
#endif
|
|
|
|
#if defined(CONFIG_BOOTP_BOOTFILESIZE)
|
|
*e++ = 13; /* Boot file size */
|
|
*e++ = 2;
|
|
e += 2;
|
|
#endif
|
|
|
|
#if defined(CONFIG_BOOTP_BOOTPATH)
|
|
*e++ = 17; /* Boot path */
|
|
*e++ = 32;
|
|
e += 32;
|
|
#endif
|
|
|
|
#if defined(CONFIG_BOOTP_NISDOMAIN)
|
|
*e++ = 40; /* NIS Domain name request */
|
|
*e++ = 32;
|
|
e += 32;
|
|
#endif
|
|
#if defined(CONFIG_BOOTP_NTPSERVER)
|
|
*e++ = 42;
|
|
*e++ = 4;
|
|
e += 4;
|
|
#endif
|
|
|
|
*e++ = 255; /* End of the list */
|
|
|
|
/*
|
|
* If nothing in list, remove it altogether. Some DHCP servers get
|
|
* upset by this minor faux pas and do not respond at all.
|
|
*/
|
|
if (e == start + 3) {
|
|
printf("*** Warning: no DHCP options requested\n");
|
|
e -= 3;
|
|
}
|
|
|
|
return e - start;
|
|
}
|
|
#endif
|
|
|
|
void bootp_reset(void)
|
|
{
|
|
bootp_num_ids = 0;
|
|
bootp_try = 0;
|
|
bootp_start = get_timer(0);
|
|
bootp_timeout = 250;
|
|
}
|
|
|
|
void bootp_request(void)
|
|
{
|
|
uchar *pkt, *iphdr;
|
|
struct bootp_hdr *bp;
|
|
int extlen, pktlen, iplen;
|
|
int eth_hdr_size;
|
|
#ifdef CONFIG_BOOTP_RANDOM_DELAY
|
|
ulong rand_ms;
|
|
#endif
|
|
u32 bootp_id;
|
|
struct in_addr zero_ip;
|
|
struct in_addr bcast_ip;
|
|
char *ep; /* Environment pointer */
|
|
|
|
bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start");
|
|
#if defined(CONFIG_CMD_DHCP)
|
|
dhcp_state = INIT;
|
|
#endif
|
|
|
|
ep = env_get("bootpretryperiod");
|
|
if (ep != NULL)
|
|
time_taken_max = simple_strtoul(ep, NULL, 10);
|
|
else
|
|
time_taken_max = TIMEOUT_MS;
|
|
|
|
#ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
|
|
if (bootp_try == 0)
|
|
srand_mac();
|
|
|
|
if (bootp_try <= 2) /* Start with max 1024 * 1ms */
|
|
rand_ms = rand() >> (22 - bootp_try);
|
|
else /* After 3rd BOOTP request max 8192 * 1ms */
|
|
rand_ms = rand() >> 19;
|
|
|
|
printf("Random delay: %ld ms...\n", rand_ms);
|
|
mdelay(rand_ms);
|
|
|
|
#endif /* CONFIG_BOOTP_RANDOM_DELAY */
|
|
|
|
printf("BOOTP broadcast %d\n", ++bootp_try);
|
|
pkt = net_tx_packet;
|
|
memset((void *)pkt, 0, PKTSIZE);
|
|
|
|
eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
|
|
pkt += eth_hdr_size;
|
|
|
|
/*
|
|
* Next line results in incorrect packet size being transmitted,
|
|
* resulting in errors in some DHCP servers, reporting missing bytes.
|
|
* Size must be set in packet header after extension length has been
|
|
* determined.
|
|
* C. Hallinan, DS4.COM, Inc.
|
|
*/
|
|
/* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
|
|
sizeof (struct bootp_hdr)); */
|
|
iphdr = pkt; /* We need this later for net_set_udp_header() */
|
|
pkt += IP_UDP_HDR_SIZE;
|
|
|
|
bp = (struct bootp_hdr *)pkt;
|
|
bp->bp_op = OP_BOOTREQUEST;
|
|
bp->bp_htype = HWT_ETHER;
|
|
bp->bp_hlen = HWL_ETHER;
|
|
bp->bp_hops = 0;
|
|
/*
|
|
* according to RFC1542, should be 0 on first request, secs since
|
|
* first request otherwise
|
|
*/
|
|
bp->bp_secs = htons(get_timer(bootp_start) / 1000);
|
|
zero_ip.s_addr = 0;
|
|
net_write_ip(&bp->bp_ciaddr, zero_ip);
|
|
net_write_ip(&bp->bp_yiaddr, zero_ip);
|
|
net_write_ip(&bp->bp_siaddr, zero_ip);
|
|
net_write_ip(&bp->bp_giaddr, zero_ip);
|
|
memcpy(bp->bp_chaddr, net_ethaddr, 6);
|
|
copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
|
|
|
|
/* Request additional information from the BOOTP/DHCP server */
|
|
#if defined(CONFIG_CMD_DHCP)
|
|
extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_DISCOVER, zero_ip,
|
|
zero_ip);
|
|
#else
|
|
extlen = bootp_extended((u8 *)bp->bp_vend);
|
|
#endif
|
|
|
|
/*
|
|
* Bootp ID is the lower 4 bytes of our ethernet address
|
|
* plus the current time in ms.
|
|
*/
|
|
bootp_id = ((u32)net_ethaddr[2] << 24)
|
|
| ((u32)net_ethaddr[3] << 16)
|
|
| ((u32)net_ethaddr[4] << 8)
|
|
| (u32)net_ethaddr[5];
|
|
bootp_id += get_timer(0);
|
|
bootp_id = htonl(bootp_id);
|
|
bootp_add_id(bootp_id);
|
|
net_copy_u32(&bp->bp_id, &bootp_id);
|
|
|
|
/*
|
|
* Calculate proper packet lengths taking into account the
|
|
* variable size of the options field
|
|
*/
|
|
iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
|
|
pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
|
|
bcast_ip.s_addr = 0xFFFFFFFFL;
|
|
net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
|
|
net_set_timeout_handler(bootp_timeout, bootp_timeout_handler);
|
|
|
|
#if defined(CONFIG_CMD_DHCP)
|
|
dhcp_state = SELECTING;
|
|
net_set_udp_handler(dhcp_handler);
|
|
#else
|
|
net_set_udp_handler(bootp_handler);
|
|
#endif
|
|
net_send_packet(net_tx_packet, pktlen);
|
|
}
|
|
|
|
#if defined(CONFIG_CMD_DHCP)
|
|
static void dhcp_process_options(uchar *popt, uchar *end)
|
|
{
|
|
int oplen, size;
|
|
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
|
|
int *to_ptr;
|
|
#endif
|
|
|
|
while (popt < end && *popt != 0xff) {
|
|
oplen = *(popt + 1);
|
|
switch (*popt) {
|
|
case 0:
|
|
oplen = -1; /* Pad omits len byte */
|
|
break;
|
|
case 1:
|
|
net_copy_ip(&net_netmask, (popt + 2));
|
|
break;
|
|
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
|
|
case 2: /* Time offset */
|
|
to_ptr = &net_ntp_time_offset;
|
|
net_copy_u32((u32 *)to_ptr, (u32 *)(popt + 2));
|
|
net_ntp_time_offset = ntohl(net_ntp_time_offset);
|
|
break;
|
|
#endif
|
|
case 3:
|
|
net_copy_ip(&net_gateway, (popt + 2));
|
|
break;
|
|
case 6:
|
|
net_copy_ip(&net_dns_server, (popt + 2));
|
|
#if defined(CONFIG_BOOTP_DNS2)
|
|
if (*(popt + 1) > 4)
|
|
net_copy_ip(&net_dns_server2, (popt + 2 + 4));
|
|
#endif
|
|
break;
|
|
case 12:
|
|
size = truncate_sz("Host Name",
|
|
sizeof(net_hostname), oplen);
|
|
memcpy(&net_hostname, popt + 2, size);
|
|
net_hostname[size] = 0;
|
|
break;
|
|
case 15: /* Ignore Domain Name Option */
|
|
break;
|
|
case 17:
|
|
size = truncate_sz("Root Path",
|
|
sizeof(net_root_path), oplen);
|
|
memcpy(&net_root_path, popt + 2, size);
|
|
net_root_path[size] = 0;
|
|
break;
|
|
case 28: /* Ignore Broadcast Address Option */
|
|
break;
|
|
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
|
|
case 42: /* NTP server IP */
|
|
net_copy_ip(&net_ntp_server, (popt + 2));
|
|
break;
|
|
#endif
|
|
case 51:
|
|
net_copy_u32(&dhcp_leasetime, (u32 *)(popt + 2));
|
|
break;
|
|
case 52:
|
|
dhcp_option_overload = popt[2];
|
|
break;
|
|
case 53: /* Ignore Message Type Option */
|
|
break;
|
|
case 54:
|
|
net_copy_ip(&dhcp_server_ip, (popt + 2));
|
|
break;
|
|
case 58: /* Ignore Renewal Time Option */
|
|
break;
|
|
case 59: /* Ignore Rebinding Time Option */
|
|
break;
|
|
case 66: /* Ignore TFTP server name */
|
|
break;
|
|
case 67: /* Bootfile option */
|
|
if (!net_boot_file_name_explicit) {
|
|
size = truncate_sz("Bootfile",
|
|
sizeof(net_boot_file_name),
|
|
oplen);
|
|
memcpy(&net_boot_file_name, popt + 2, size);
|
|
net_boot_file_name[size] = 0;
|
|
}
|
|
break;
|
|
default:
|
|
#if defined(CONFIG_BOOTP_VENDOREX)
|
|
if (dhcp_vendorex_proc(popt))
|
|
break;
|
|
#endif
|
|
printf("*** Unhandled DHCP Option in OFFER/ACK:"
|
|
" %d\n", *popt);
|
|
break;
|
|
}
|
|
popt += oplen + 2; /* Process next option */
|
|
}
|
|
}
|
|
|
|
static void dhcp_packet_process_options(struct bootp_hdr *bp)
|
|
{
|
|
uchar *popt = (uchar *)&bp->bp_vend[4];
|
|
uchar *end = popt + BOOTP_HDR_SIZE;
|
|
|
|
if (net_read_u32((u32 *)&bp->bp_vend[0]) != htonl(BOOTP_VENDOR_MAGIC))
|
|
return;
|
|
|
|
dhcp_option_overload = 0;
|
|
|
|
/*
|
|
* The 'options' field MUST be interpreted first, 'file' next,
|
|
* 'sname' last.
|
|
*/
|
|
dhcp_process_options(popt, end);
|
|
|
|
if (dhcp_option_overload & OVERLOAD_FILE) {
|
|
popt = (uchar *)bp->bp_file;
|
|
end = popt + sizeof(bp->bp_file);
|
|
dhcp_process_options(popt, end);
|
|
}
|
|
|
|
if (dhcp_option_overload & OVERLOAD_SNAME) {
|
|
popt = (uchar *)bp->bp_sname;
|
|
end = popt + sizeof(bp->bp_sname);
|
|
dhcp_process_options(popt, end);
|
|
}
|
|
}
|
|
|
|
static int dhcp_message_type(unsigned char *popt)
|
|
{
|
|
if (net_read_u32((u32 *)popt) != htonl(BOOTP_VENDOR_MAGIC))
|
|
return -1;
|
|
|
|
popt += 4;
|
|
while (*popt != 0xff) {
|
|
if (*popt == 53) /* DHCP Message Type */
|
|
return *(popt + 2);
|
|
if (*popt == 0) {
|
|
/* Pad */
|
|
popt += 1;
|
|
} else {
|
|
/* Scan through all options */
|
|
popt += *(popt + 1) + 2;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void dhcp_send_request_packet(struct bootp_hdr *bp_offer)
|
|
{
|
|
uchar *pkt, *iphdr;
|
|
struct bootp_hdr *bp;
|
|
int pktlen, iplen, extlen;
|
|
int eth_hdr_size;
|
|
struct in_addr offered_ip;
|
|
struct in_addr zero_ip;
|
|
struct in_addr bcast_ip;
|
|
|
|
debug("dhcp_send_request_packet: Sending DHCPREQUEST\n");
|
|
pkt = net_tx_packet;
|
|
memset((void *)pkt, 0, PKTSIZE);
|
|
|
|
eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
|
|
pkt += eth_hdr_size;
|
|
|
|
iphdr = pkt; /* We'll need this later to set proper pkt size */
|
|
pkt += IP_UDP_HDR_SIZE;
|
|
|
|
bp = (struct bootp_hdr *)pkt;
|
|
bp->bp_op = OP_BOOTREQUEST;
|
|
bp->bp_htype = HWT_ETHER;
|
|
bp->bp_hlen = HWL_ETHER;
|
|
bp->bp_hops = 0;
|
|
bp->bp_secs = htons(get_timer(bootp_start) / 1000);
|
|
/* Do not set the client IP, your IP, or server IP yet, since it
|
|
* hasn't been ACK'ed by the server yet */
|
|
|
|
/*
|
|
* RFC3046 requires Relay Agents to discard packets with
|
|
* nonzero and offered giaddr
|
|
*/
|
|
zero_ip.s_addr = 0;
|
|
net_write_ip(&bp->bp_giaddr, zero_ip);
|
|
|
|
memcpy(bp->bp_chaddr, net_ethaddr, 6);
|
|
copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
|
|
|
|
/*
|
|
* ID is the id of the OFFER packet
|
|
*/
|
|
|
|
net_copy_u32(&bp->bp_id, &bp_offer->bp_id);
|
|
|
|
/*
|
|
* Copy options from OFFER packet if present
|
|
*/
|
|
|
|
/* Copy offered IP into the parameters request list */
|
|
net_copy_ip(&offered_ip, &bp_offer->bp_yiaddr);
|
|
extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_REQUEST,
|
|
dhcp_server_ip, offered_ip);
|
|
|
|
iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
|
|
pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
|
|
bcast_ip.s_addr = 0xFFFFFFFFL;
|
|
net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
|
|
|
|
#ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
|
|
udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY);
|
|
#endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
|
|
debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
|
|
net_send_packet(net_tx_packet, pktlen);
|
|
}
|
|
|
|
/*
|
|
* Handle DHCP received packets.
|
|
*/
|
|
static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
|
|
unsigned src, unsigned len)
|
|
{
|
|
struct bootp_hdr *bp = (struct bootp_hdr *)pkt;
|
|
|
|
debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
|
|
src, dest, len, dhcp_state);
|
|
|
|
/* Filter out pkts we don't want */
|
|
if (check_reply_packet(pkt, dest, src, len))
|
|
return;
|
|
|
|
debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: "
|
|
"%d\n", src, dest, len, dhcp_state);
|
|
|
|
if (net_read_ip(&bp->bp_yiaddr).s_addr == 0)
|
|
return;
|
|
|
|
switch (dhcp_state) {
|
|
case SELECTING:
|
|
/*
|
|
* Wait an appropriate time for any potential DHCPOFFER packets
|
|
* to arrive. Then select one, and generate DHCPREQUEST
|
|
* response. If filename is in format we recognize, assume it
|
|
* is a valid OFFER from a server we want.
|
|
*/
|
|
debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
|
|
#ifdef CONFIG_SYS_BOOTFILE_PREFIX
|
|
if (strncmp(bp->bp_file,
|
|
CONFIG_SYS_BOOTFILE_PREFIX,
|
|
strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0) {
|
|
#endif /* CONFIG_SYS_BOOTFILE_PREFIX */
|
|
dhcp_packet_process_options(bp);
|
|
efi_net_set_dhcp_ack(pkt, len);
|
|
|
|
debug("TRANSITIONING TO REQUESTING STATE\n");
|
|
dhcp_state = REQUESTING;
|
|
|
|
net_set_timeout_handler(5000, bootp_timeout_handler);
|
|
dhcp_send_request_packet(bp);
|
|
#ifdef CONFIG_SYS_BOOTFILE_PREFIX
|
|
}
|
|
#endif /* CONFIG_SYS_BOOTFILE_PREFIX */
|
|
|
|
return;
|
|
break;
|
|
case REQUESTING:
|
|
debug("DHCP State: REQUESTING\n");
|
|
|
|
if (dhcp_message_type((u8 *)bp->bp_vend) == DHCP_ACK) {
|
|
dhcp_packet_process_options(bp);
|
|
/* Store net params from reply */
|
|
store_net_params(bp);
|
|
dhcp_state = BOUND;
|
|
printf("DHCP client bound to address %pI4 (%lu ms)\n",
|
|
&net_ip, get_timer(bootp_start));
|
|
net_set_timeout_handler(0, (thand_f *)0);
|
|
bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP,
|
|
"bootp_stop");
|
|
|
|
net_auto_load();
|
|
return;
|
|
}
|
|
break;
|
|
case BOUND:
|
|
/* DHCP client bound to address */
|
|
break;
|
|
default:
|
|
puts("DHCP: INVALID STATE\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
void dhcp_request(void)
|
|
{
|
|
bootp_request();
|
|
}
|
|
#endif /* CONFIG_CMD_DHCP */
|