mirror of
https://github.com/brain-hackers/u-boot-brain
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![Marek Szyprowski](/assets/img/avatar_default.png)
Reset the stored ping IP address before entering a netloop with different protocol to ensure that it won't be interrupted by the received correct ICMP_ECHO_REPLY packet. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
1614 lines
37 KiB
C
1614 lines
37 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copied from Linux Monitor (LiMon) - Networking.
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*
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* Copyright 1994 - 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 2000-2002 Wolfgang Denk, wd@denx.de
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*/
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/*
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* General Desription:
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*
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* The user interface supports commands for BOOTP, RARP, and TFTP.
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* Also, we support ARP internally. Depending on available data,
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* these interact as follows:
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*
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* BOOTP:
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*
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* Prerequisites: - own ethernet address
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* We want: - own IP address
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* - TFTP server IP address
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* - name of bootfile
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* Next step: ARP
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*
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* LINK_LOCAL:
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*
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* Prerequisites: - own ethernet address
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* We want: - own IP address
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* Next step: ARP
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*
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* RARP:
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*
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* Prerequisites: - own ethernet address
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* We want: - own IP address
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* - TFTP server IP address
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* Next step: ARP
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*
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* ARP:
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*
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* Prerequisites: - own ethernet address
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* - own IP address
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* - TFTP server IP address
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* We want: - TFTP server ethernet address
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* Next step: TFTP
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*
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* DHCP:
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*
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* Prerequisites: - own ethernet address
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* We want: - IP, Netmask, ServerIP, Gateway IP
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* - bootfilename, lease time
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* Next step: - TFTP
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*
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* TFTP:
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*
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* Prerequisites: - own ethernet address
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* - own IP address
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* - TFTP server IP address
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* - TFTP server ethernet address
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* - name of bootfile (if unknown, we use a default name
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* derived from our own IP address)
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* We want: - load the boot file
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* Next step: none
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*
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* NFS:
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*
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* Prerequisites: - own ethernet address
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* - own IP address
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* - name of bootfile (if unknown, we use a default name
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* derived from our own IP address)
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* We want: - load the boot file
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* Next step: none
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*
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* SNTP:
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*
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* Prerequisites: - own ethernet address
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* - own IP address
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* We want: - network time
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* Next step: none
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*
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* WOL:
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*
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* Prerequisites: - own ethernet address
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* We want: - magic packet or timeout
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* Next step: none
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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 <console.h>
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#include <env.h>
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#include <env_internal.h>
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#include <errno.h>
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#include <image.h>
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#include <log.h>
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#include <net.h>
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#include <net/fastboot.h>
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#include <net/tftp.h>
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#if defined(CONFIG_CMD_PCAP)
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#include <net/pcap.h>
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#endif
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#if defined(CONFIG_LED_STATUS)
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#include <miiphy.h>
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#include <status_led.h>
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#endif
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#include <watchdog.h>
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#include <linux/compiler.h>
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#include "arp.h"
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#include "bootp.h"
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#include "cdp.h"
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#if defined(CONFIG_CMD_DNS)
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#include "dns.h"
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#endif
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#include "link_local.h"
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#include "nfs.h"
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#include "ping.h"
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#include "rarp.h"
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#if defined(CONFIG_CMD_SNTP)
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#include "sntp.h"
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#endif
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#if defined(CONFIG_CMD_WOL)
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#include "wol.h"
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#endif
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/** BOOTP EXTENTIONS **/
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/* Our subnet mask (0=unknown) */
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struct in_addr net_netmask;
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/* Our gateways IP address */
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struct in_addr net_gateway;
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/* Our DNS IP address */
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struct in_addr net_dns_server;
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#if defined(CONFIG_BOOTP_DNS2)
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/* Our 2nd DNS IP address */
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struct in_addr net_dns_server2;
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#endif
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/** END OF BOOTP EXTENTIONS **/
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/* Our ethernet address */
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u8 net_ethaddr[6];
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/* Boot server enet address */
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u8 net_server_ethaddr[6];
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/* Our IP addr (0 = unknown) */
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struct in_addr net_ip;
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/* Server IP addr (0 = unknown) */
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struct in_addr net_server_ip;
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/* Current receive packet */
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uchar *net_rx_packet;
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/* Current rx packet length */
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int net_rx_packet_len;
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/* IP packet ID */
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static unsigned net_ip_id;
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/* Ethernet bcast address */
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const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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const u8 net_null_ethaddr[6];
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#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
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void (*push_packet)(void *, int len) = 0;
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#endif
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/* Network loop state */
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enum net_loop_state net_state;
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/* Tried all network devices */
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int net_restart_wrap;
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/* Network loop restarted */
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static int net_restarted;
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/* At least one device configured */
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static int net_dev_exists;
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/* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
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/* default is without VLAN */
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ushort net_our_vlan = 0xFFFF;
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/* ditto */
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ushort net_native_vlan = 0xFFFF;
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/* Boot File name */
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char net_boot_file_name[1024];
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/* Indicates whether the file name was specified on the command line */
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bool net_boot_file_name_explicit;
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/* The actual transferred size of the bootfile (in bytes) */
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u32 net_boot_file_size;
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/* Boot file size in blocks as reported by the DHCP server */
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u32 net_boot_file_expected_size_in_blocks;
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#if defined(CONFIG_CMD_SNTP)
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/* NTP server IP address */
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struct in_addr net_ntp_server;
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/* offset time from UTC */
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int net_ntp_time_offset;
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#endif
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static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
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/* Receive packets */
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uchar *net_rx_packets[PKTBUFSRX];
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/* Current UDP RX packet handler */
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static rxhand_f *udp_packet_handler;
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/* Current ARP RX packet handler */
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static rxhand_f *arp_packet_handler;
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#ifdef CONFIG_CMD_TFTPPUT
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/* Current ICMP rx handler */
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static rxhand_icmp_f *packet_icmp_handler;
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#endif
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/* Current timeout handler */
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static thand_f *time_handler;
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/* Time base value */
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static ulong time_start;
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/* Current timeout value */
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static ulong time_delta;
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/* THE transmit packet */
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uchar *net_tx_packet;
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static int net_check_prereq(enum proto_t protocol);
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static int net_try_count;
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int __maybe_unused net_busy_flag;
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/**********************************************************************/
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static int on_ipaddr(const char *name, const char *value, enum env_op op,
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int flags)
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{
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if (flags & H_PROGRAMMATIC)
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return 0;
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net_ip = string_to_ip(value);
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return 0;
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}
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U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr);
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static int on_gatewayip(const char *name, const char *value, enum env_op op,
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int flags)
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{
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if (flags & H_PROGRAMMATIC)
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return 0;
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net_gateway = string_to_ip(value);
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return 0;
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}
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U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip);
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static int on_netmask(const char *name, const char *value, enum env_op op,
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int flags)
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{
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if (flags & H_PROGRAMMATIC)
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return 0;
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net_netmask = string_to_ip(value);
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return 0;
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}
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U_BOOT_ENV_CALLBACK(netmask, on_netmask);
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static int on_serverip(const char *name, const char *value, enum env_op op,
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int flags)
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{
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if (flags & H_PROGRAMMATIC)
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return 0;
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net_server_ip = string_to_ip(value);
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return 0;
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}
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U_BOOT_ENV_CALLBACK(serverip, on_serverip);
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static int on_nvlan(const char *name, const char *value, enum env_op op,
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int flags)
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{
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if (flags & H_PROGRAMMATIC)
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return 0;
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net_native_vlan = string_to_vlan(value);
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return 0;
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}
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U_BOOT_ENV_CALLBACK(nvlan, on_nvlan);
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static int on_vlan(const char *name, const char *value, enum env_op op,
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int flags)
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{
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if (flags & H_PROGRAMMATIC)
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return 0;
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net_our_vlan = string_to_vlan(value);
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return 0;
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}
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U_BOOT_ENV_CALLBACK(vlan, on_vlan);
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#if defined(CONFIG_CMD_DNS)
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static int on_dnsip(const char *name, const char *value, enum env_op op,
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int flags)
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{
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if (flags & H_PROGRAMMATIC)
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return 0;
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net_dns_server = string_to_ip(value);
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return 0;
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}
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U_BOOT_ENV_CALLBACK(dnsip, on_dnsip);
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#endif
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/*
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* Check if autoload is enabled. If so, use either NFS or TFTP to download
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* the boot file.
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*/
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void net_auto_load(void)
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{
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#if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
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const char *s = env_get("autoload");
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if (s != NULL && strcmp(s, "NFS") == 0) {
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if (net_check_prereq(NFS)) {
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/* We aren't expecting to get a serverip, so just accept the assigned IP */
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#ifdef CONFIG_BOOTP_SERVERIP
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net_set_state(NETLOOP_SUCCESS);
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#else
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printf("Cannot autoload with NFS\n");
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net_set_state(NETLOOP_FAIL);
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#endif
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return;
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}
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/*
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* Use NFS to load the bootfile.
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*/
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nfs_start();
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return;
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}
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#endif
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if (env_get_yesno("autoload") == 0) {
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/*
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* Just use BOOTP/RARP to configure system;
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* Do not use TFTP to load the bootfile.
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*/
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net_set_state(NETLOOP_SUCCESS);
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return;
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}
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if (net_check_prereq(TFTPGET)) {
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/* We aren't expecting to get a serverip, so just accept the assigned IP */
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#ifdef CONFIG_BOOTP_SERVERIP
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net_set_state(NETLOOP_SUCCESS);
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#else
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printf("Cannot autoload with TFTPGET\n");
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net_set_state(NETLOOP_FAIL);
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#endif
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return;
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}
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tftp_start(TFTPGET);
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}
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static void net_init_loop(void)
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{
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if (eth_get_dev())
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memcpy(net_ethaddr, eth_get_ethaddr(), 6);
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return;
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}
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static void net_clear_handlers(void)
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{
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net_set_udp_handler(NULL);
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net_set_arp_handler(NULL);
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net_set_timeout_handler(0, NULL);
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}
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static void net_cleanup_loop(void)
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{
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net_clear_handlers();
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}
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void net_init(void)
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{
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static int first_call = 1;
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if (first_call) {
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/*
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* Setup packet buffers, aligned correctly.
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*/
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int i;
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net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
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net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
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for (i = 0; i < PKTBUFSRX; i++) {
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net_rx_packets[i] = net_tx_packet +
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(i + 1) * PKTSIZE_ALIGN;
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}
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arp_init();
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net_clear_handlers();
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/* Only need to setup buffer pointers once. */
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first_call = 0;
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}
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net_init_loop();
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}
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/**********************************************************************/
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/*
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* Main network processing loop.
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*/
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int net_loop(enum proto_t protocol)
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{
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int ret = -EINVAL;
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enum net_loop_state prev_net_state = net_state;
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#if defined(CONFIG_CMD_PING)
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if (protocol != PING)
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net_ping_ip.s_addr = 0;
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#endif
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net_restarted = 0;
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net_dev_exists = 0;
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net_try_count = 1;
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debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
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bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
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net_init();
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if (eth_is_on_demand_init() || protocol != NETCONS) {
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eth_halt();
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eth_set_current();
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ret = eth_init();
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if (ret < 0) {
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eth_halt();
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return ret;
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}
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} else {
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eth_init_state_only();
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}
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restart:
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#ifdef CONFIG_USB_KEYBOARD
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net_busy_flag = 0;
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#endif
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net_set_state(NETLOOP_CONTINUE);
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/*
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* Start the ball rolling with the given start function. From
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* here on, this code is a state machine driven by received
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* packets and timer events.
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*/
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debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
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net_init_loop();
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switch (net_check_prereq(protocol)) {
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case 1:
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/* network not configured */
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eth_halt();
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net_set_state(prev_net_state);
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return -ENODEV;
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case 2:
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/* network device not configured */
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break;
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case 0:
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net_dev_exists = 1;
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net_boot_file_size = 0;
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switch (protocol) {
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#ifdef CONFIG_CMD_TFTPBOOT
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case TFTPGET:
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#ifdef CONFIG_CMD_TFTPPUT
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case TFTPPUT:
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#endif
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/* always use ARP to get server ethernet address */
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tftp_start(protocol);
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break;
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#endif
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#ifdef CONFIG_CMD_TFTPSRV
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case TFTPSRV:
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tftp_start_server();
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break;
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#endif
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#ifdef CONFIG_UDP_FUNCTION_FASTBOOT
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case FASTBOOT:
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fastboot_start_server();
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break;
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#endif
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#if defined(CONFIG_CMD_DHCP)
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case DHCP:
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bootp_reset();
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net_ip.s_addr = 0;
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dhcp_request(); /* Basically same as BOOTP */
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break;
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#endif
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#if defined(CONFIG_CMD_BOOTP)
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case BOOTP:
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bootp_reset();
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net_ip.s_addr = 0;
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bootp_request();
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break;
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#endif
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#if defined(CONFIG_CMD_RARP)
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case RARP:
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rarp_try = 0;
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net_ip.s_addr = 0;
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rarp_request();
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break;
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#endif
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#if defined(CONFIG_CMD_PING)
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case PING:
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ping_start();
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break;
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#endif
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#if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
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case NFS:
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nfs_start();
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break;
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#endif
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#if defined(CONFIG_CMD_CDP)
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case CDP:
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cdp_start();
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break;
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#endif
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#if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
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case NETCONS:
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nc_start();
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break;
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#endif
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#if defined(CONFIG_CMD_SNTP)
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case SNTP:
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sntp_start();
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break;
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#endif
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#if defined(CONFIG_CMD_DNS)
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case DNS:
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dns_start();
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break;
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#endif
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#if defined(CONFIG_CMD_LINK_LOCAL)
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case LINKLOCAL:
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link_local_start();
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break;
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#endif
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#if defined(CONFIG_CMD_WOL)
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case WOL:
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wol_start();
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break;
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#endif
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default:
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break;
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}
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break;
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}
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#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
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#if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
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defined(CONFIG_LED_STATUS) && \
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defined(CONFIG_LED_STATUS_RED)
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/*
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* Echo the inverted link state to the fault LED.
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*/
|
|
if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
|
|
status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF);
|
|
else
|
|
status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON);
|
|
#endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
|
|
#endif /* CONFIG_MII, ... */
|
|
#ifdef CONFIG_USB_KEYBOARD
|
|
net_busy_flag = 1;
|
|
#endif
|
|
|
|
/*
|
|
* Main packet reception loop. Loop receiving packets until
|
|
* someone sets `net_state' to a state that terminates.
|
|
*/
|
|
for (;;) {
|
|
WATCHDOG_RESET();
|
|
if (arp_timeout_check() > 0)
|
|
time_start = get_timer(0);
|
|
|
|
/*
|
|
* Check the ethernet for a new packet. The ethernet
|
|
* receive routine will process it.
|
|
* Most drivers return the most recent packet size, but not
|
|
* errors that may have happened.
|
|
*/
|
|
eth_rx();
|
|
|
|
/*
|
|
* Abort if ctrl-c was pressed.
|
|
*/
|
|
if (ctrlc()) {
|
|
/* cancel any ARP that may not have completed */
|
|
net_arp_wait_packet_ip.s_addr = 0;
|
|
|
|
net_cleanup_loop();
|
|
eth_halt();
|
|
/* Invalidate the last protocol */
|
|
eth_set_last_protocol(BOOTP);
|
|
|
|
puts("\nAbort\n");
|
|
/* include a debug print as well incase the debug
|
|
messages are directed to stderr */
|
|
debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
|
|
ret = -EINTR;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Check for a timeout, and run the timeout handler
|
|
* if we have one.
|
|
*/
|
|
if (time_handler &&
|
|
((get_timer(0) - time_start) > time_delta)) {
|
|
thand_f *x;
|
|
|
|
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
|
|
#if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
|
|
defined(CONFIG_LED_STATUS) && \
|
|
defined(CONFIG_LED_STATUS_RED)
|
|
/*
|
|
* Echo the inverted link state to the fault LED.
|
|
*/
|
|
if (miiphy_link(eth_get_dev()->name,
|
|
CONFIG_SYS_FAULT_MII_ADDR))
|
|
status_led_set(CONFIG_LED_STATUS_RED,
|
|
CONFIG_LED_STATUS_OFF);
|
|
else
|
|
status_led_set(CONFIG_LED_STATUS_RED,
|
|
CONFIG_LED_STATUS_ON);
|
|
#endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
|
|
#endif /* CONFIG_MII, ... */
|
|
debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
|
|
x = time_handler;
|
|
time_handler = (thand_f *)0;
|
|
(*x)();
|
|
}
|
|
|
|
if (net_state == NETLOOP_FAIL)
|
|
ret = net_start_again();
|
|
|
|
switch (net_state) {
|
|
case NETLOOP_RESTART:
|
|
net_restarted = 1;
|
|
goto restart;
|
|
|
|
case NETLOOP_SUCCESS:
|
|
net_cleanup_loop();
|
|
if (net_boot_file_size > 0) {
|
|
printf("Bytes transferred = %d (%x hex)\n",
|
|
net_boot_file_size, net_boot_file_size);
|
|
env_set_hex("filesize", net_boot_file_size);
|
|
env_set_hex("fileaddr", image_load_addr);
|
|
}
|
|
if (protocol != NETCONS)
|
|
eth_halt();
|
|
else
|
|
eth_halt_state_only();
|
|
|
|
eth_set_last_protocol(protocol);
|
|
|
|
ret = net_boot_file_size;
|
|
debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
|
|
goto done;
|
|
|
|
case NETLOOP_FAIL:
|
|
net_cleanup_loop();
|
|
/* Invalidate the last protocol */
|
|
eth_set_last_protocol(BOOTP);
|
|
debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
|
|
ret = -ENONET;
|
|
goto done;
|
|
|
|
case NETLOOP_CONTINUE:
|
|
continue;
|
|
}
|
|
}
|
|
|
|
done:
|
|
#ifdef CONFIG_USB_KEYBOARD
|
|
net_busy_flag = 0;
|
|
#endif
|
|
#ifdef CONFIG_CMD_TFTPPUT
|
|
/* Clear out the handlers */
|
|
net_set_udp_handler(NULL);
|
|
net_set_icmp_handler(NULL);
|
|
#endif
|
|
net_set_state(prev_net_state);
|
|
|
|
#if defined(CONFIG_CMD_PCAP)
|
|
if (pcap_active())
|
|
pcap_print_status();
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
/**********************************************************************/
|
|
|
|
static void start_again_timeout_handler(void)
|
|
{
|
|
net_set_state(NETLOOP_RESTART);
|
|
}
|
|
|
|
int net_start_again(void)
|
|
{
|
|
char *nretry;
|
|
int retry_forever = 0;
|
|
unsigned long retrycnt = 0;
|
|
int ret;
|
|
|
|
nretry = env_get("netretry");
|
|
if (nretry) {
|
|
if (!strcmp(nretry, "yes"))
|
|
retry_forever = 1;
|
|
else if (!strcmp(nretry, "no"))
|
|
retrycnt = 0;
|
|
else if (!strcmp(nretry, "once"))
|
|
retrycnt = 1;
|
|
else
|
|
retrycnt = simple_strtoul(nretry, NULL, 0);
|
|
} else {
|
|
retrycnt = 0;
|
|
retry_forever = 0;
|
|
}
|
|
|
|
if ((!retry_forever) && (net_try_count > retrycnt)) {
|
|
eth_halt();
|
|
net_set_state(NETLOOP_FAIL);
|
|
/*
|
|
* We don't provide a way for the protocol to return an error,
|
|
* but this is almost always the reason.
|
|
*/
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
net_try_count++;
|
|
|
|
eth_halt();
|
|
#if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
|
|
eth_try_another(!net_restarted);
|
|
#endif
|
|
ret = eth_init();
|
|
if (net_restart_wrap) {
|
|
net_restart_wrap = 0;
|
|
if (net_dev_exists) {
|
|
net_set_timeout_handler(10000UL,
|
|
start_again_timeout_handler);
|
|
net_set_udp_handler(NULL);
|
|
} else {
|
|
net_set_state(NETLOOP_FAIL);
|
|
}
|
|
} else {
|
|
net_set_state(NETLOOP_RESTART);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/*
|
|
* Miscelaneous bits.
|
|
*/
|
|
|
|
static void dummy_handler(uchar *pkt, unsigned dport,
|
|
struct in_addr sip, unsigned sport,
|
|
unsigned len)
|
|
{
|
|
}
|
|
|
|
rxhand_f *net_get_udp_handler(void)
|
|
{
|
|
return udp_packet_handler;
|
|
}
|
|
|
|
void net_set_udp_handler(rxhand_f *f)
|
|
{
|
|
debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
|
|
if (f == NULL)
|
|
udp_packet_handler = dummy_handler;
|
|
else
|
|
udp_packet_handler = f;
|
|
}
|
|
|
|
rxhand_f *net_get_arp_handler(void)
|
|
{
|
|
return arp_packet_handler;
|
|
}
|
|
|
|
void net_set_arp_handler(rxhand_f *f)
|
|
{
|
|
debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
|
|
if (f == NULL)
|
|
arp_packet_handler = dummy_handler;
|
|
else
|
|
arp_packet_handler = f;
|
|
}
|
|
|
|
#ifdef CONFIG_CMD_TFTPPUT
|
|
void net_set_icmp_handler(rxhand_icmp_f *f)
|
|
{
|
|
packet_icmp_handler = f;
|
|
}
|
|
#endif
|
|
|
|
void net_set_timeout_handler(ulong iv, thand_f *f)
|
|
{
|
|
if (iv == 0) {
|
|
debug_cond(DEBUG_INT_STATE,
|
|
"--- net_loop timeout handler cancelled\n");
|
|
time_handler = (thand_f *)0;
|
|
} else {
|
|
debug_cond(DEBUG_INT_STATE,
|
|
"--- net_loop timeout handler set (%p)\n", f);
|
|
time_handler = f;
|
|
time_start = get_timer(0);
|
|
time_delta = iv * CONFIG_SYS_HZ / 1000;
|
|
}
|
|
}
|
|
|
|
uchar *net_get_async_tx_pkt_buf(void)
|
|
{
|
|
if (arp_is_waiting())
|
|
return arp_tx_packet; /* If we are waiting, we already sent */
|
|
else
|
|
return net_tx_packet;
|
|
}
|
|
|
|
int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
|
|
int payload_len)
|
|
{
|
|
return net_send_ip_packet(ether, dest, dport, sport, payload_len,
|
|
IPPROTO_UDP, 0, 0, 0);
|
|
}
|
|
|
|
int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
|
|
int payload_len, int proto, u8 action, u32 tcp_seq_num,
|
|
u32 tcp_ack_num)
|
|
{
|
|
uchar *pkt;
|
|
int eth_hdr_size;
|
|
int pkt_hdr_size;
|
|
|
|
/* make sure the net_tx_packet is initialized (net_init() was called) */
|
|
assert(net_tx_packet != NULL);
|
|
if (net_tx_packet == NULL)
|
|
return -1;
|
|
|
|
/* convert to new style broadcast */
|
|
if (dest.s_addr == 0)
|
|
dest.s_addr = 0xFFFFFFFF;
|
|
|
|
/* if broadcast, make the ether address a broadcast and don't do ARP */
|
|
if (dest.s_addr == 0xFFFFFFFF)
|
|
ether = (uchar *)net_bcast_ethaddr;
|
|
|
|
pkt = (uchar *)net_tx_packet;
|
|
|
|
eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
|
|
|
|
switch (proto) {
|
|
case IPPROTO_UDP:
|
|
net_set_udp_header(pkt + eth_hdr_size, dest, dport, sport,
|
|
payload_len);
|
|
pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* if MAC address was not discovered yet, do an ARP request */
|
|
if (memcmp(ether, net_null_ethaddr, 6) == 0) {
|
|
debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
|
|
|
|
/* save the ip and eth addr for the packet to send after arp */
|
|
net_arp_wait_packet_ip = dest;
|
|
arp_wait_packet_ethaddr = ether;
|
|
|
|
/* size of the waiting packet */
|
|
arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
|
|
|
|
/* and do the ARP request */
|
|
arp_wait_try = 1;
|
|
arp_wait_timer_start = get_timer(0);
|
|
arp_request();
|
|
return 1; /* waiting */
|
|
} else {
|
|
debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
|
|
&dest, ether);
|
|
net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
|
|
return 0; /* transmitted */
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_IP_DEFRAG
|
|
/*
|
|
* This function collects fragments in a single packet, according
|
|
* to the algorithm in RFC815. It returns NULL or the pointer to
|
|
* a complete packet, in static storage
|
|
*/
|
|
#define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
|
|
|
|
#define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
|
|
|
|
/*
|
|
* this is the packet being assembled, either data or frag control.
|
|
* Fragments go by 8 bytes, so this union must be 8 bytes long
|
|
*/
|
|
struct hole {
|
|
/* first_byte is address of this structure */
|
|
u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
|
|
u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
|
|
u16 prev_hole; /* index of prev, 0 == none */
|
|
u16 unused;
|
|
};
|
|
|
|
static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
|
|
{
|
|
static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
|
|
static u16 first_hole, total_len;
|
|
struct hole *payload, *thisfrag, *h, *newh;
|
|
struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
|
|
uchar *indata = (uchar *)ip;
|
|
int offset8, start, len, done = 0;
|
|
u16 ip_off = ntohs(ip->ip_off);
|
|
|
|
/* payload starts after IP header, this fragment is in there */
|
|
payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
|
|
offset8 = (ip_off & IP_OFFS);
|
|
thisfrag = payload + offset8;
|
|
start = offset8 * 8;
|
|
len = ntohs(ip->ip_len) - IP_HDR_SIZE;
|
|
|
|
if (start + len > IP_MAXUDP) /* fragment extends too far */
|
|
return NULL;
|
|
|
|
if (!total_len || localip->ip_id != ip->ip_id) {
|
|
/* new (or different) packet, reset structs */
|
|
total_len = 0xffff;
|
|
payload[0].last_byte = ~0;
|
|
payload[0].next_hole = 0;
|
|
payload[0].prev_hole = 0;
|
|
first_hole = 0;
|
|
/* any IP header will work, copy the first we received */
|
|
memcpy(localip, ip, IP_HDR_SIZE);
|
|
}
|
|
|
|
/*
|
|
* What follows is the reassembly algorithm. We use the payload
|
|
* array as a linked list of hole descriptors, as each hole starts
|
|
* at a multiple of 8 bytes. However, last byte can be whatever value,
|
|
* so it is represented as byte count, not as 8-byte blocks.
|
|
*/
|
|
|
|
h = payload + first_hole;
|
|
while (h->last_byte < start) {
|
|
if (!h->next_hole) {
|
|
/* no hole that far away */
|
|
return NULL;
|
|
}
|
|
h = payload + h->next_hole;
|
|
}
|
|
|
|
/* last fragment may be 1..7 bytes, the "+7" forces acceptance */
|
|
if (offset8 + ((len + 7) / 8) <= h - payload) {
|
|
/* no overlap with holes (dup fragment?) */
|
|
return NULL;
|
|
}
|
|
|
|
if (!(ip_off & IP_FLAGS_MFRAG)) {
|
|
/* no more fragmentss: truncate this (last) hole */
|
|
total_len = start + len;
|
|
h->last_byte = start + len;
|
|
}
|
|
|
|
/*
|
|
* There is some overlap: fix the hole list. This code doesn't
|
|
* deal with a fragment that overlaps with two different holes
|
|
* (thus being a superset of a previously-received fragment).
|
|
*/
|
|
|
|
if ((h >= thisfrag) && (h->last_byte <= start + len)) {
|
|
/* complete overlap with hole: remove hole */
|
|
if (!h->prev_hole && !h->next_hole) {
|
|
/* last remaining hole */
|
|
done = 1;
|
|
} else if (!h->prev_hole) {
|
|
/* first hole */
|
|
first_hole = h->next_hole;
|
|
payload[h->next_hole].prev_hole = 0;
|
|
} else if (!h->next_hole) {
|
|
/* last hole */
|
|
payload[h->prev_hole].next_hole = 0;
|
|
} else {
|
|
/* in the middle of the list */
|
|
payload[h->next_hole].prev_hole = h->prev_hole;
|
|
payload[h->prev_hole].next_hole = h->next_hole;
|
|
}
|
|
|
|
} else if (h->last_byte <= start + len) {
|
|
/* overlaps with final part of the hole: shorten this hole */
|
|
h->last_byte = start;
|
|
|
|
} else if (h >= thisfrag) {
|
|
/* overlaps with initial part of the hole: move this hole */
|
|
newh = thisfrag + (len / 8);
|
|
*newh = *h;
|
|
h = newh;
|
|
if (h->next_hole)
|
|
payload[h->next_hole].prev_hole = (h - payload);
|
|
if (h->prev_hole)
|
|
payload[h->prev_hole].next_hole = (h - payload);
|
|
else
|
|
first_hole = (h - payload);
|
|
|
|
} else {
|
|
/* fragment sits in the middle: split the hole */
|
|
newh = thisfrag + (len / 8);
|
|
*newh = *h;
|
|
h->last_byte = start;
|
|
h->next_hole = (newh - payload);
|
|
newh->prev_hole = (h - payload);
|
|
if (newh->next_hole)
|
|
payload[newh->next_hole].prev_hole = (newh - payload);
|
|
}
|
|
|
|
/* finally copy this fragment and possibly return whole packet */
|
|
memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
|
|
if (!done)
|
|
return NULL;
|
|
|
|
localip->ip_len = htons(total_len);
|
|
*lenp = total_len + IP_HDR_SIZE;
|
|
return localip;
|
|
}
|
|
|
|
static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
|
|
int *lenp)
|
|
{
|
|
u16 ip_off = ntohs(ip->ip_off);
|
|
if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
|
|
return ip; /* not a fragment */
|
|
return __net_defragment(ip, lenp);
|
|
}
|
|
|
|
#else /* !CONFIG_IP_DEFRAG */
|
|
|
|
static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
|
|
int *lenp)
|
|
{
|
|
u16 ip_off = ntohs(ip->ip_off);
|
|
if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
|
|
return ip; /* not a fragment */
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
|
|
* drop others.
|
|
*
|
|
* @parma ip IP packet containing the ICMP
|
|
*/
|
|
static void receive_icmp(struct ip_udp_hdr *ip, int len,
|
|
struct in_addr src_ip, struct ethernet_hdr *et)
|
|
{
|
|
struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
|
|
|
|
switch (icmph->type) {
|
|
case ICMP_REDIRECT:
|
|
if (icmph->code != ICMP_REDIR_HOST)
|
|
return;
|
|
printf(" ICMP Host Redirect to %pI4 ",
|
|
&icmph->un.gateway);
|
|
break;
|
|
default:
|
|
#if defined(CONFIG_CMD_PING)
|
|
ping_receive(et, ip, len);
|
|
#endif
|
|
#ifdef CONFIG_CMD_TFTPPUT
|
|
if (packet_icmp_handler)
|
|
packet_icmp_handler(icmph->type, icmph->code,
|
|
ntohs(ip->udp_dst), src_ip,
|
|
ntohs(ip->udp_src), icmph->un.data,
|
|
ntohs(ip->udp_len));
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
|
|
void net_process_received_packet(uchar *in_packet, int len)
|
|
{
|
|
struct ethernet_hdr *et;
|
|
struct ip_udp_hdr *ip;
|
|
struct in_addr dst_ip;
|
|
struct in_addr src_ip;
|
|
int eth_proto;
|
|
#if defined(CONFIG_CMD_CDP)
|
|
int iscdp;
|
|
#endif
|
|
ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
|
|
|
|
debug_cond(DEBUG_NET_PKT, "packet received\n");
|
|
|
|
#if defined(CONFIG_CMD_PCAP)
|
|
pcap_post(in_packet, len, false);
|
|
#endif
|
|
net_rx_packet = in_packet;
|
|
net_rx_packet_len = len;
|
|
et = (struct ethernet_hdr *)in_packet;
|
|
|
|
/* too small packet? */
|
|
if (len < ETHER_HDR_SIZE)
|
|
return;
|
|
|
|
#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
|
|
if (push_packet) {
|
|
(*push_packet)(in_packet, len);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_CMD_CDP)
|
|
/* keep track if packet is CDP */
|
|
iscdp = is_cdp_packet(et->et_dest);
|
|
#endif
|
|
|
|
myvlanid = ntohs(net_our_vlan);
|
|
if (myvlanid == (ushort)-1)
|
|
myvlanid = VLAN_NONE;
|
|
mynvlanid = ntohs(net_native_vlan);
|
|
if (mynvlanid == (ushort)-1)
|
|
mynvlanid = VLAN_NONE;
|
|
|
|
eth_proto = ntohs(et->et_protlen);
|
|
|
|
if (eth_proto < 1514) {
|
|
struct e802_hdr *et802 = (struct e802_hdr *)et;
|
|
/*
|
|
* Got a 802.2 packet. Check the other protocol field.
|
|
* XXX VLAN over 802.2+SNAP not implemented!
|
|
*/
|
|
eth_proto = ntohs(et802->et_prot);
|
|
|
|
ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
|
|
len -= E802_HDR_SIZE;
|
|
|
|
} else if (eth_proto != PROT_VLAN) { /* normal packet */
|
|
ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
|
|
len -= ETHER_HDR_SIZE;
|
|
|
|
} else { /* VLAN packet */
|
|
struct vlan_ethernet_hdr *vet =
|
|
(struct vlan_ethernet_hdr *)et;
|
|
|
|
debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
|
|
|
|
/* too small packet? */
|
|
if (len < VLAN_ETHER_HDR_SIZE)
|
|
return;
|
|
|
|
/* if no VLAN active */
|
|
if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
|
|
#if defined(CONFIG_CMD_CDP)
|
|
&& iscdp == 0
|
|
#endif
|
|
)
|
|
return;
|
|
|
|
cti = ntohs(vet->vet_tag);
|
|
vlanid = cti & VLAN_IDMASK;
|
|
eth_proto = ntohs(vet->vet_type);
|
|
|
|
ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
|
|
len -= VLAN_ETHER_HDR_SIZE;
|
|
}
|
|
|
|
debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
|
|
|
|
#if defined(CONFIG_CMD_CDP)
|
|
if (iscdp) {
|
|
cdp_receive((uchar *)ip, len);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
|
|
if (vlanid == VLAN_NONE)
|
|
vlanid = (mynvlanid & VLAN_IDMASK);
|
|
/* not matched? */
|
|
if (vlanid != (myvlanid & VLAN_IDMASK))
|
|
return;
|
|
}
|
|
|
|
switch (eth_proto) {
|
|
case PROT_ARP:
|
|
arp_receive(et, ip, len);
|
|
break;
|
|
|
|
#ifdef CONFIG_CMD_RARP
|
|
case PROT_RARP:
|
|
rarp_receive(ip, len);
|
|
break;
|
|
#endif
|
|
case PROT_IP:
|
|
debug_cond(DEBUG_NET_PKT, "Got IP\n");
|
|
/* Before we start poking the header, make sure it is there */
|
|
if (len < IP_UDP_HDR_SIZE) {
|
|
debug("len bad %d < %lu\n", len,
|
|
(ulong)IP_UDP_HDR_SIZE);
|
|
return;
|
|
}
|
|
/* Check the packet length */
|
|
if (len < ntohs(ip->ip_len)) {
|
|
debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
|
|
return;
|
|
}
|
|
len = ntohs(ip->ip_len);
|
|
debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
|
|
len, ip->ip_hl_v & 0xff);
|
|
|
|
/* Can't deal with anything except IPv4 */
|
|
if ((ip->ip_hl_v & 0xf0) != 0x40)
|
|
return;
|
|
/* Can't deal with IP options (headers != 20 bytes) */
|
|
if ((ip->ip_hl_v & 0x0f) > 0x05)
|
|
return;
|
|
/* Check the Checksum of the header */
|
|
if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
|
|
debug("checksum bad\n");
|
|
return;
|
|
}
|
|
/* If it is not for us, ignore it */
|
|
dst_ip = net_read_ip(&ip->ip_dst);
|
|
if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
|
|
dst_ip.s_addr != 0xFFFFFFFF) {
|
|
return;
|
|
}
|
|
/* Read source IP address for later use */
|
|
src_ip = net_read_ip(&ip->ip_src);
|
|
/*
|
|
* The function returns the unchanged packet if it's not
|
|
* a fragment, and either the complete packet or NULL if
|
|
* it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
|
|
*/
|
|
ip = net_defragment(ip, &len);
|
|
if (!ip)
|
|
return;
|
|
/*
|
|
* watch for ICMP host redirects
|
|
*
|
|
* There is no real handler code (yet). We just watch
|
|
* for ICMP host redirect messages. In case anybody
|
|
* sees these messages: please contact me
|
|
* (wd@denx.de), or - even better - send me the
|
|
* necessary fixes :-)
|
|
*
|
|
* Note: in all cases where I have seen this so far
|
|
* it was a problem with the router configuration,
|
|
* for instance when a router was configured in the
|
|
* BOOTP reply, but the TFTP server was on the same
|
|
* subnet. So this is probably a warning that your
|
|
* configuration might be wrong. But I'm not really
|
|
* sure if there aren't any other situations.
|
|
*
|
|
* Simon Glass <sjg@chromium.org>: We get an ICMP when
|
|
* we send a tftp packet to a dead connection, or when
|
|
* there is no server at the other end.
|
|
*/
|
|
if (ip->ip_p == IPPROTO_ICMP) {
|
|
receive_icmp(ip, len, src_ip, et);
|
|
return;
|
|
} else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
|
|
return;
|
|
}
|
|
|
|
if (ntohs(ip->udp_len) < UDP_HDR_SIZE || ntohs(ip->udp_len) > ntohs(ip->ip_len))
|
|
return;
|
|
|
|
debug_cond(DEBUG_DEV_PKT,
|
|
"received UDP (to=%pI4, from=%pI4, len=%d)\n",
|
|
&dst_ip, &src_ip, len);
|
|
|
|
#ifdef CONFIG_UDP_CHECKSUM
|
|
if (ip->udp_xsum != 0) {
|
|
ulong xsum;
|
|
u8 *sumptr;
|
|
ushort sumlen;
|
|
|
|
xsum = ip->ip_p;
|
|
xsum += (ntohs(ip->udp_len));
|
|
xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
|
|
xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
|
|
xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
|
|
xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
|
|
|
|
sumlen = ntohs(ip->udp_len);
|
|
sumptr = (u8 *)&ip->udp_src;
|
|
|
|
while (sumlen > 1) {
|
|
/* inlined ntohs() to avoid alignment errors */
|
|
xsum += (sumptr[0] << 8) + sumptr[1];
|
|
sumptr += 2;
|
|
sumlen -= 2;
|
|
}
|
|
if (sumlen > 0)
|
|
xsum += (sumptr[0] << 8) + sumptr[0];
|
|
while ((xsum >> 16) != 0) {
|
|
xsum = (xsum & 0x0000ffff) +
|
|
((xsum >> 16) & 0x0000ffff);
|
|
}
|
|
if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
|
|
printf(" UDP wrong checksum %08lx %08x\n",
|
|
xsum, ntohs(ip->udp_xsum));
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
|
|
nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
|
|
src_ip,
|
|
ntohs(ip->udp_dst),
|
|
ntohs(ip->udp_src),
|
|
ntohs(ip->udp_len) - UDP_HDR_SIZE);
|
|
#endif
|
|
/*
|
|
* IP header OK. Pass the packet to the current handler.
|
|
*/
|
|
(*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
|
|
ntohs(ip->udp_dst),
|
|
src_ip,
|
|
ntohs(ip->udp_src),
|
|
ntohs(ip->udp_len) - UDP_HDR_SIZE);
|
|
break;
|
|
#ifdef CONFIG_CMD_WOL
|
|
case PROT_WOL:
|
|
wol_receive(ip, len);
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/**********************************************************************/
|
|
|
|
static int net_check_prereq(enum proto_t protocol)
|
|
{
|
|
switch (protocol) {
|
|
/* Fall through */
|
|
#if defined(CONFIG_CMD_PING)
|
|
case PING:
|
|
if (net_ping_ip.s_addr == 0) {
|
|
puts("*** ERROR: ping address not given\n");
|
|
return 1;
|
|
}
|
|
goto common;
|
|
#endif
|
|
#if defined(CONFIG_CMD_SNTP)
|
|
case SNTP:
|
|
if (net_ntp_server.s_addr == 0) {
|
|
puts("*** ERROR: NTP server address not given\n");
|
|
return 1;
|
|
}
|
|
goto common;
|
|
#endif
|
|
#if defined(CONFIG_CMD_DNS)
|
|
case DNS:
|
|
if (net_dns_server.s_addr == 0) {
|
|
puts("*** ERROR: DNS server address not given\n");
|
|
return 1;
|
|
}
|
|
goto common;
|
|
#endif
|
|
#if defined(CONFIG_CMD_NFS)
|
|
case NFS:
|
|
#endif
|
|
/* Fall through */
|
|
case TFTPGET:
|
|
case TFTPPUT:
|
|
if (net_server_ip.s_addr == 0 && !is_serverip_in_cmd()) {
|
|
puts("*** ERROR: `serverip' not set\n");
|
|
return 1;
|
|
}
|
|
#if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
|
|
defined(CONFIG_CMD_DNS)
|
|
common:
|
|
#endif
|
|
/* Fall through */
|
|
|
|
case NETCONS:
|
|
case FASTBOOT:
|
|
case TFTPSRV:
|
|
if (net_ip.s_addr == 0) {
|
|
puts("*** ERROR: `ipaddr' not set\n");
|
|
return 1;
|
|
}
|
|
/* Fall through */
|
|
|
|
#ifdef CONFIG_CMD_RARP
|
|
case RARP:
|
|
#endif
|
|
case BOOTP:
|
|
case CDP:
|
|
case DHCP:
|
|
case LINKLOCAL:
|
|
if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
|
|
int num = eth_get_dev_index();
|
|
|
|
switch (num) {
|
|
case -1:
|
|
puts("*** ERROR: No ethernet found.\n");
|
|
return 1;
|
|
case 0:
|
|
puts("*** ERROR: `ethaddr' not set\n");
|
|
break;
|
|
default:
|
|
printf("*** ERROR: `eth%daddr' not set\n",
|
|
num);
|
|
break;
|
|
}
|
|
|
|
net_start_again();
|
|
return 2;
|
|
}
|
|
/* Fall through */
|
|
default:
|
|
return 0;
|
|
}
|
|
return 0; /* OK */
|
|
}
|
|
/**********************************************************************/
|
|
|
|
int
|
|
net_eth_hdr_size(void)
|
|
{
|
|
ushort myvlanid;
|
|
|
|
myvlanid = ntohs(net_our_vlan);
|
|
if (myvlanid == (ushort)-1)
|
|
myvlanid = VLAN_NONE;
|
|
|
|
return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
|
|
VLAN_ETHER_HDR_SIZE;
|
|
}
|
|
|
|
int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
|
|
{
|
|
struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
|
|
ushort myvlanid;
|
|
|
|
myvlanid = ntohs(net_our_vlan);
|
|
if (myvlanid == (ushort)-1)
|
|
myvlanid = VLAN_NONE;
|
|
|
|
memcpy(et->et_dest, dest_ethaddr, 6);
|
|
memcpy(et->et_src, net_ethaddr, 6);
|
|
if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
|
|
et->et_protlen = htons(prot);
|
|
return ETHER_HDR_SIZE;
|
|
} else {
|
|
struct vlan_ethernet_hdr *vet =
|
|
(struct vlan_ethernet_hdr *)xet;
|
|
|
|
vet->vet_vlan_type = htons(PROT_VLAN);
|
|
vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
|
|
vet->vet_type = htons(prot);
|
|
return VLAN_ETHER_HDR_SIZE;
|
|
}
|
|
}
|
|
|
|
int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
|
|
{
|
|
ushort protlen;
|
|
|
|
memcpy(et->et_dest, addr, 6);
|
|
memcpy(et->et_src, net_ethaddr, 6);
|
|
protlen = ntohs(et->et_protlen);
|
|
if (protlen == PROT_VLAN) {
|
|
struct vlan_ethernet_hdr *vet =
|
|
(struct vlan_ethernet_hdr *)et;
|
|
vet->vet_type = htons(prot);
|
|
return VLAN_ETHER_HDR_SIZE;
|
|
} else if (protlen > 1514) {
|
|
et->et_protlen = htons(prot);
|
|
return ETHER_HDR_SIZE;
|
|
} else {
|
|
/* 802.2 + SNAP */
|
|
struct e802_hdr *et802 = (struct e802_hdr *)et;
|
|
et802->et_prot = htons(prot);
|
|
return E802_HDR_SIZE;
|
|
}
|
|
}
|
|
|
|
void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
|
|
u16 pkt_len, u8 proto)
|
|
{
|
|
struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
|
|
|
|
/*
|
|
* Construct an IP header.
|
|
*/
|
|
/* IP_HDR_SIZE / 4 (not including UDP) */
|
|
ip->ip_hl_v = 0x45;
|
|
ip->ip_tos = 0;
|
|
ip->ip_len = htons(pkt_len);
|
|
ip->ip_p = proto;
|
|
ip->ip_id = htons(net_ip_id++);
|
|
ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
|
|
ip->ip_ttl = 255;
|
|
ip->ip_sum = 0;
|
|
/* already in network byte order */
|
|
net_copy_ip((void *)&ip->ip_src, &source);
|
|
/* already in network byte order */
|
|
net_copy_ip((void *)&ip->ip_dst, &dest);
|
|
|
|
ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
|
|
}
|
|
|
|
void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
|
|
int len)
|
|
{
|
|
struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
|
|
|
|
/*
|
|
* If the data is an odd number of bytes, zero the
|
|
* byte after the last byte so that the checksum
|
|
* will work.
|
|
*/
|
|
if (len & 1)
|
|
pkt[IP_UDP_HDR_SIZE + len] = 0;
|
|
|
|
net_set_ip_header(pkt, dest, net_ip, IP_UDP_HDR_SIZE + len,
|
|
IPPROTO_UDP);
|
|
|
|
ip->udp_src = htons(sport);
|
|
ip->udp_dst = htons(dport);
|
|
ip->udp_len = htons(UDP_HDR_SIZE + len);
|
|
ip->udp_xsum = 0;
|
|
}
|
|
|
|
void copy_filename(char *dst, const char *src, int size)
|
|
{
|
|
if (src && *src && (*src == '"')) {
|
|
++src;
|
|
--size;
|
|
}
|
|
|
|
while ((--size > 0) && src && *src && (*src != '"'))
|
|
*dst++ = *src++;
|
|
*dst = '\0';
|
|
}
|
|
|
|
int is_serverip_in_cmd(void)
|
|
{
|
|
return !!strchr(net_boot_file_name, ':');
|
|
}
|
|
|
|
int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len)
|
|
{
|
|
char *colon;
|
|
|
|
if (net_boot_file_name[0] == '\0')
|
|
return 0;
|
|
|
|
colon = strchr(net_boot_file_name, ':');
|
|
if (colon) {
|
|
if (ipaddr)
|
|
*ipaddr = string_to_ip(net_boot_file_name);
|
|
strncpy(filename, colon + 1, max_len);
|
|
} else {
|
|
strncpy(filename, net_boot_file_name, max_len);
|
|
}
|
|
filename[max_len - 1] = '\0';
|
|
|
|
return 1;
|
|
}
|
|
|
|
void ip_to_string(struct in_addr x, char *s)
|
|
{
|
|
x.s_addr = ntohl(x.s_addr);
|
|
sprintf(s, "%d.%d.%d.%d",
|
|
(int) ((x.s_addr >> 24) & 0xff),
|
|
(int) ((x.s_addr >> 16) & 0xff),
|
|
(int) ((x.s_addr >> 8) & 0xff),
|
|
(int) ((x.s_addr >> 0) & 0xff)
|
|
);
|
|
}
|
|
|
|
void vlan_to_string(ushort x, char *s)
|
|
{
|
|
x = ntohs(x);
|
|
|
|
if (x == (ushort)-1)
|
|
x = VLAN_NONE;
|
|
|
|
if (x == VLAN_NONE)
|
|
strcpy(s, "none");
|
|
else
|
|
sprintf(s, "%d", x & VLAN_IDMASK);
|
|
}
|
|
|
|
ushort string_to_vlan(const char *s)
|
|
{
|
|
ushort id;
|
|
|
|
if (s == NULL)
|
|
return htons(VLAN_NONE);
|
|
|
|
if (*s < '0' || *s > '9')
|
|
id = VLAN_NONE;
|
|
else
|
|
id = (ushort)simple_strtoul(s, NULL, 10);
|
|
|
|
return htons(id);
|
|
}
|
|
|
|
ushort env_get_vlan(char *var)
|
|
{
|
|
return string_to_vlan(env_get(var));
|
|
}
|