From d9bec9f42ab34383737c8a94429aa02fe76d7946 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sat, 18 Jul 2009 21:04:08 -0400 Subject: net: rename NetRxPkt to NetRxPacket The net code is mostly consistent in using 'Packet' rather than 'Pkt', so rename the minor detractor to follow suite. Signed-off-by: Mike Frysinger Signed-off-by: Ben Warren --- net/bootp.c | 2 +- net/net.c | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-) (limited to 'net') diff --git a/net/bootp.c b/net/bootp.c index 77057c6c0a7..d5f9c4be6d3 100644 --- a/net/bootp.c +++ b/net/bootp.c @@ -124,7 +124,7 @@ static void BootpCopyNetParams(Bootp_t *bp) NetCopyIP(&tmp_ip, &bp->bp_siaddr); if (tmp_ip != 0) NetCopyIP(&NetServerIP, &bp->bp_siaddr); - memcpy (NetServerEther, ((Ethernet_t *)NetRxPkt)->et_src, 6); + memcpy (NetServerEther, ((Ethernet_t *)NetRxPacket)->et_src, 6); #endif if (strlen(bp->bp_file) > 0) copy_filename (BootFile, bp->bp_file, sizeof(BootFile)); diff --git a/net/net.c b/net/net.c index 5637cf54f6d..e215fd8d9a9 100644 --- a/net/net.c +++ b/net/net.c @@ -139,8 +139,8 @@ uchar NetServerEther[6] = /* Boot server enet address */ { 0, 0, 0, 0, 0, 0 }; IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ -volatile uchar *NetRxPkt; /* Current receive packet */ -int NetRxPktLen; /* Current rx packet length */ +volatile uchar *NetRxPacket; /* Current receive packet */ +int NetRxPacketLen; /* Current rx packet length */ unsigned NetIPID; /* IP packet ID */ uchar NetBcastAddr[6] = /* Ethernet bcast address */ { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; @@ -1122,8 +1122,8 @@ NetReceive(volatile uchar * inpkt, int len) printf("packet received\n"); #endif - NetRxPkt = inpkt; - NetRxPktLen = len; + NetRxPacket = inpkt; + NetRxPacketLen = len; et = (Ethernet_t *)inpkt; /* too small packet? */ -- cgit v1.3.1 From 1a32bf41881b5dbe3119cb77a33572b4d462cabf Mon Sep 17 00:00:00 2001 From: Robin Getz Date: Mon, 20 Jul 2009 14:53:54 -0400 Subject: Add DNS support On 04 Oct 2008 Pieter posted a dns implementation for U-Boot. http://www.mail-archive.com/u-boot-users@lists.sourceforge.net/msg10216.html > > DNS can be enabled by setting CFG_CMD_DNS. After performing a query, > the serverip environment var is updated. > > Probably there are some cosmetic issues with the patch. Unfortunatly I > do not have the time to correct these. So if anybody else likes DNS > support in U-Boot and has the time, feel free to patch it in the main tree. Here it is again - slightly modified & smaller: - update to 2009-06 (Pieter's patch was for U-Boot 1.2.0) - README.dns is added - syntax is changed (now takes a third option, the env var to store the result in) - add a random port() function in net.c - sort Makefile in ./net/Makefile - dns just returns unless a env var is given - run through checkpatch, and clean up style issues - remove packet from stack - cleaned up some comments - failure returns much faster (if server responds, don't wait for timeout) - use built in functions (memcpy) rather than byte copy. Signed-off-by: Robin Getz Signed-off-by: Pieter Voorthuijsen Signed-off-by: Ben Warren --- common/cmd_net.c | 49 +++++++++++++ doc/README.dns | 64 +++++++++++++++++ include/net.h | 5 ++ net/Makefile | 7 +- net/dns.c | 211 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ net/dns.h | 39 ++++++++++ net/net.c | 29 ++++++++ 7 files changed, 401 insertions(+), 3 deletions(-) create mode 100644 doc/README.dns create mode 100644 net/dns.c create mode 100644 net/dns.h (limited to 'net') diff --git a/common/cmd_net.c b/common/cmd_net.c index 68183c49af9..ac706ae8d5e 100644 --- a/common/cmd_net.c +++ b/common/cmd_net.c @@ -353,3 +353,52 @@ U_BOOT_CMD( "[NTP server IP]\n" ); #endif + +#if defined(CONFIG_CMD_DNS) +int do_dns(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + if (argc == 1) { + cmd_usage(cmdtp); + return -1; + } + + /* + * We should check for a valid hostname: + * - Each label must be between 1 and 63 characters long + * - the entire hostname has a maximum of 255 characters + * - only the ASCII letters 'a' through 'z' (case-insensitive), + * the digits '0' through '9', and the hyphen + * - cannot begin or end with a hyphen + * - no other symbols, punctuation characters, or blank spaces are + * permitted + * but hey - this is a minimalist implmentation, so only check length + * and let the name server deal with things. + */ + if (strlen(argv[1]) >= 255) { + printf("dns error: hostname too long\n"); + return 1; + } + + NetDNSResolve = argv[1]; + + if (argc == 3) + NetDNSenvvar = argv[2]; + else + NetDNSenvvar = NULL; + + if (NetLoop(DNS) < 0) { + printf("dns lookup of %s failed, check setup\n", argv[1]); + return 1; + } + + return 0; +} + +U_BOOT_CMD( + dns, 3, 1, do_dns, + "lookup the IP of a hostname", + "hostname [envvar]" +); + +#endif /* CONFIG_CMD_DNS */ + diff --git a/doc/README.dns b/doc/README.dns new file mode 100644 index 00000000000..deeccd77200 --- /dev/null +++ b/doc/README.dns @@ -0,0 +1,64 @@ +Domain Name System +------------------------------------------- + +The Domain Name System (DNS) is a hierarchical naming system for computers, +services, or any resource participating in the Internet. It associates various +information with domain names assigned to each of the participants. Most +importantly, it translates domain names meaningful to humans into the numerical +(binary) identifiers associated with networking equipment for the purpose of +locating and addressing these devices world-wide. An often used analogy to +explain the Domain Name System is that it serves as the "phone book" for the +Internet by translating human-friendly computer hostnames into IP addresses. +For example, www.example.com translates to 208.77.188.166. + +For more information on DNS - http://en.wikipedia.org/wiki/Domain_Name_System + + + +U-Boot and DNS +------------------------------------------ + +CONFIG_CMD_DNS - controls if the 'dns' command is compiled in. If it is, it + will send name lookups to the dns server (env var 'dnsip') + Turning this option on will about abou 1k to U-Boot's size. + + Example: + +bfin> print dnsip +dnsip=192.168.0.1 + +bfin> dns www.google.com +66.102.1.104 + + By default, dns does nothing except print the IP number on + the default console - which by itself, would be pretty + useless. Adding a third argument to the dns command will + use that as the environment variable to be set. + + Example: + +bfin> print googleip +## Error: "googleip" not defined +bfin> dns www.google.com googleip +64.233.161.104 +bfin> print googleip +googleip=64.233.161.104 +bfin> ping ${googleip} +Using Blackfin EMAC device +host 64.233.161.104 is alive + + In this way, you can lookup, and set many more meaningful + things. + +bfin> sntp +ntpserverip not set +bfin> dns pool.ntp.org ntpserverip +72.18.205.156 +bfin> sntp +Date: 2009-07-18 Time: 4:06:57 + + For some helpful things that can be related to DNS in U-Boot, + look at the top level README for these config options: + CONFIG_CMD_DHCP + CONFIG_BOOTP_DNS + CONFIG_BOOTP_DNS2 diff --git a/include/net.h b/include/net.h index 88a95135716..4a03717ae9b 100644 --- a/include/net.h +++ b/include/net.h @@ -361,6 +361,11 @@ typedef enum { BOOTP, RARP, ARP, TFTP, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP /* from net/net.c */ extern char BootFile[128]; /* Boot File name */ +#if defined(CONFIG_CMD_DNS) +extern char *NetDNSResolve; /* The host to resolve */ +extern char *NetDNSenvvar; /* the env var to put the ip into */ +#endif + #if defined(CONFIG_CMD_PING) extern IPaddr_t NetPingIP; /* the ip address to ping */ #endif diff --git a/net/Makefile b/net/Makefile index d3418742502..835a04af455 100644 --- a/net/Makefile +++ b/net/Makefile @@ -27,13 +27,14 @@ include $(TOPDIR)/config.mk LIB = $(obj)libnet.a -COBJS-y += net.o -COBJS-y += tftp.o COBJS-y += bootp.o -COBJS-y += rarp.o +COBJS-$(CONFIG_CMD_DNS) += dns.o COBJS-y += eth.o +COBJS-y += net.o COBJS-y += nfs.o +COBJS-y += rarp.o COBJS-$(CONFIG_CMD_SNTP) += sntp.o +COBJS-y += tftp.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/net/dns.c b/net/dns.c new file mode 100644 index 00000000000..f25c3f8c247 --- /dev/null +++ b/net/dns.c @@ -0,0 +1,211 @@ +/* + * DNS support driver + * + * Copyright (c) 2008 Pieter Voorthuijsen + * Copyright (c) 2009 Robin Getz + * + * This is a simple DNS implementation for U-Boot. It will use the first IP + * in the DNS response as NetServerIP. This can then be used for any other + * network related activities. + * + * The packet handling is partly based on TADNS, original copyrights + * follow below. + * + */ + +/* + * Copyright (c) 2004-2005 Sergey Lyubka + * + * "THE BEER-WARE LICENSE" (Revision 42): + * Sergey Lyubka wrote this file. As long as you retain this notice you + * can do whatever you want with this stuff. If we meet some day, and you think + * this stuff is worth it, you can buy me a beer in return. + */ + +#include +#include +#include + +#include "dns.h" + +char *NetDNSResolve; /* The host to resolve */ +char *NetDNSenvvar; /* The envvar to store the answer in */ + +static int DnsOurPort; + +static void +DnsSend(void) +{ + struct header *header; + int n, name_len; + uchar *p, *pkt; + const char *s; + const char *name; + enum dns_query_type qtype = DNS_A_RECORD; + + name = NetDNSResolve; + pkt = p = (uchar *)(NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE); + + /* Prepare DNS packet header */ + header = (struct header *) pkt; + header->tid = 1; + header->flags = htons(0x100); /* standard query */ + header->nqueries = htons(1); /* Just one query */ + header->nanswers = 0; + header->nauth = 0; + header->nother = 0; + + /* Encode DNS name */ + name_len = strlen(name); + p = (uchar *) &header->data; /* For encoding host name into packet */ + + do { + s = strchr(name, '.'); + if (!s) + s = name + name_len; + + n = s - name; /* Chunk length */ + *p++ = n; /* Copy length */ + memcpy(p, name, n); /* Copy chunk */ + p += n; + + if (*s == '.') + n++; + + name += n; + name_len -= n; + } while (*s != '\0'); + + *p++ = 0; /* Mark end of host name */ + *p++ = 0; /* Some servers require double null */ + *p++ = (unsigned char) qtype; /* Query Type */ + + *p++ = 0; + *p++ = 1; /* Class: inet, 0x0001 */ + + n = p - pkt; /* Total packet length */ + debug("Packet size %d\n", n); + + DnsOurPort = random_port(); + + NetSendUDPPacket(NetServerEther, NetOurDNSIP, DNS_SERVICE_PORT, + DnsOurPort, n); + debug("DNS packet sent\n"); +} + +static void +DnsTimeout(void) +{ + puts("Timeout\n"); + NetState = NETLOOP_FAIL; +} + +static void +DnsHandler(uchar *pkt, unsigned dest, unsigned src, unsigned len) +{ + struct header *header; + const unsigned char *p, *e, *s; + u16 type, i; + int found, stop, dlen; + char IPStr[22]; + IPaddr_t IPAddress; + short tmp; + + + debug("%s\n", __func__); + if (dest != DnsOurPort) + return; + + for (i = 0; i < len; i += 4) + debug("0x%p - 0x%.2x 0x%.2x 0x%.2x 0x%.2x\n", + pkt+i, pkt[i], pkt[i+1], pkt[i+2], pkt[i+3]); + + /* We sent 1 query. We want to see more that 1 answer. */ + header = (struct header *) pkt; + if (ntohs(header->nqueries) != 1) + return; + + /* Received 0 answers */ + if (header->nanswers == 0) { + puts("DNS server returned no answers\n"); + NetState = NETLOOP_SUCCESS; + return; + } + + /* Skip host name */ + s = &header->data[0]; + e = pkt + len; + for (p = s; p < e && *p != '\0'; p++) + continue; + + /* We sent query class 1, query type 1 */ + tmp = p[1] | (p[2] << 8); + if (&p[5] > e || ntohs(tmp) != DNS_A_RECORD) { + puts("DNS response was not A record\n"); + NetState = NETLOOP_SUCCESS; + return; + } + + /* Go to the first answer section */ + p += 5; + + /* Loop through the answers, we want A type answer */ + for (found = stop = 0; !stop && &p[12] < e; ) { + + /* Skip possible name in CNAME answer */ + if (*p != 0xc0) { + while (*p && &p[12] < e) + p++; + p--; + } + debug("Name (Offset in header): %d\n", p[1]); + + tmp = p[2] | (p[3] << 8); + type = ntohs(tmp); + debug("type = %d\n", type); + if (type == DNS_CNAME_RECORD) { + /* CNAME answer. shift to the next section */ + debug("Found canonical name\n"); + tmp = p[10] | (p[11] << 8); + dlen = ntohs(tmp); + debug("dlen = %d\n", dlen); + p += 12 + dlen; + } else if (type == DNS_A_RECORD) { + debug("Found A-record\n"); + found = stop = 1; + } else { + debug("Unknown type\n"); + stop = 1; + } + } + + if (found && &p[12] < e) { + + tmp = p[10] | (p[11] << 8); + dlen = ntohs(tmp); + p += 12; + memcpy(&IPAddress, p, 4); + + if (p + dlen <= e) { + ip_to_string(IPAddress, IPStr); + printf("%s\n", IPStr); + if (NetDNSenvvar) + setenv(NetDNSenvvar, IPStr); + } else + puts("server responded with invalid IP number\n"); + } + + NetState = NETLOOP_SUCCESS; +} + +void +DnsStart(void) +{ + debug("%s\n", __func__); + + NetSetTimeout(DNS_TIMEOUT, DnsTimeout); + NetSetHandler(DnsHandler); + + DnsSend(); +} + diff --git a/net/dns.h b/net/dns.h new file mode 100644 index 00000000000..277c093ed33 --- /dev/null +++ b/net/dns.h @@ -0,0 +1,39 @@ +/* + * (C) Masami Komiya 2005 + * Copyright 2009, Robin Getz + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2, or (at + * your option) any later version. + */ + +#ifndef __DNS_H__ +#define __DNS_H__ + +#define DNS_SERVICE_PORT 53 +#define DNS_TIMEOUT 10000UL + +/* http://en.wikipedia.org/wiki/List_of_DNS_record_types */ +enum dns_query_type { + DNS_A_RECORD = 0x01, + DNS_CNAME_RECORD = 0x05, + DNS_MX_RECORD = 0x0f, +}; + +/* + * DNS network packet + */ +struct header { + uint16_t tid; /* Transaction ID */ + uint16_t flags; /* Flags */ + uint16_t nqueries; /* Questions */ + uint16_t nanswers; /* Answers */ + uint16_t nauth; /* Authority PRs */ + uint16_t nother; /* Other PRs */ + unsigned char data[1]; /* Data, variable length */ +}; + +extern void DnsStart(void); /* Begin DNS */ + +#endif diff --git a/net/net.c b/net/net.c index e215fd8d9a9..4bbe5313c3e 100644 --- a/net/net.c +++ b/net/net.c @@ -92,6 +92,9 @@ #if defined(CONFIG_CDP_VERSION) #include #endif +#if defined(CONFIG_CMD_DNS) +#include "dns.h" +#endif #if defined(CONFIG_CMD_NET) @@ -291,6 +294,9 @@ NetInitLoop(proto_t protocol) NetServerIP = getenv_IPaddr ("serverip"); NetOurNativeVLAN = getenv_VLAN("nvlan"); NetOurVLAN = getenv_VLAN("vlan"); +#if defined(CONFIG_CMD_DNS) + NetOurDNSIP = getenv_IPaddr("dnsip"); +#endif env_changed_id = env_id; } @@ -425,6 +431,11 @@ restart: case SNTP: SntpStart(); break; +#endif +#if defined(CONFIG_CMD_DNS) + case DNS: + DnsStart(); + break; #endif default: break; @@ -1518,6 +1529,14 @@ static int net_check_prereq (proto_t protocol) } goto common; #endif +#if defined(CONFIG_CMD_DNS) + case DNS: + if (NetOurDNSIP == 0) { + puts("*** ERROR: DNS server address not given\n"); + return 1; + } + goto common; +#endif #if defined(CONFIG_CMD_NFS) case NFS: #endif @@ -1681,6 +1700,16 @@ void copy_filename (char *dst, char *src, int size) #endif +#if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS) +/* + * make port a little random, but use something trivial to compute + */ +unsigned int random_port(void) +{ + return 1024 + (get_timer(0) % 0x8000);; +} +#endif + void ip_to_string (IPaddr_t x, char *s) { x = ntohl (x); -- cgit v1.3.1 From 3bd0a877b74b9c005ae7cb892480ccedfa308c20 Mon Sep 17 00:00:00 2001 From: Ben Warren Date: Fri, 17 Jul 2009 00:50:15 -0700 Subject: Add warning about upcoming removal of old Ethernet API Signed-off-by: Ben Warren --- net/eth.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net') diff --git a/net/eth.c b/net/eth.c index 3d93966918e..8e1d6921ca4 100644 --- a/net/eth.c +++ b/net/eth.c @@ -500,6 +500,8 @@ char *eth_get_name (void) } #elif defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_MULTI) +#warning Ethernet driver is deprecated. Please update to use CONFIG_NET_MULTI + extern int at91rm9200_miiphy_initialize(bd_t *bis); extern int mcf52x2_miiphy_initialize(bd_t *bis); extern int ns7520_miiphy_initialize(bd_t *bis); -- cgit v1.3.1 From 09133f8580f0106429ba3600f1855bd3577ae58b Mon Sep 17 00:00:00 2001 From: Michael Zaidman Date: Tue, 14 Jul 2009 23:37:12 +0300 Subject: DHCP regression on 2009-06 Fixed the DHCP/BOOTP/RARP regression introduced in u-boot-2009.06 by initializing our IP addr to 0 in order to accept any IP addr assigned to us by the DHCP/BOOTP/RARP server. Ack-by: Robin Getz Signed-off-by: Michael Zaidman Signed-off-by: Ben Warren --- net/net.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net') diff --git a/net/net.c b/net/net.c index 4bbe5313c3e..7ce947db300 100644 --- a/net/net.c +++ b/net/net.c @@ -394,17 +394,20 @@ restart: #if defined(CONFIG_CMD_DHCP) case DHCP: BootpTry = 0; + NetOurIP = 0; DhcpRequest(); /* Basically same as BOOTP */ break; #endif case BOOTP: BootpTry = 0; + NetOurIP = 0; BootpRequest (); break; case RARP: RarpTry = 0; + NetOurIP = 0; RarpRequest (); break; #if defined(CONFIG_CMD_PING) -- cgit v1.3.1 From 97cfe86163505ea18e7ff7b71e78df5bb03dad57 Mon Sep 17 00:00:00 2001 From: Robin Getz Date: Tue, 21 Jul 2009 12:15:28 -0400 Subject: Save server's MAC address in environment Linux's netconsole works much better when you can pass it the MAC address of the server. (otherwise it just uses broadcast, which everyone else on my network complains about :) This sets the env var "serveraddr" (to match ethaddr), so that you can pass it to linux with whatever bootargs you want to.... addnetconsole=set bootargs $(bootargs) netconsole=@$(ipaddr)/eth0,@$(serverip)/$(serveraddr) Signed-of-by: Robin Getz Signed-off-by: Ben Warren --- README | 5 +++++ net/net.c | 9 +++++++++ 2 files changed, 14 insertions(+) (limited to 'net') diff --git a/README b/README index 4c74cb79347..90714727cde 100644 --- a/README +++ b/README @@ -1184,6 +1184,11 @@ The following options need to be configured: Defines a default value for the IP address of a TFTP server to contact when using the "tftboot" command. + CONFIG_KEEP_SERVERADDR + + Keeps the server's MAC address, in the env 'serveraddr' + for passing to bootargs (like Linux's netconsole option) + - Multicast TFTP Mode: CONFIG_MCAST_TFTP diff --git a/net/net.c b/net/net.c index 7ce947db300..641c37cb8f3 100644 --- a/net/net.c +++ b/net/net.c @@ -1287,6 +1287,15 @@ NetReceive(volatile uchar * inpkt, int len) /* are we waiting for a reply */ if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) break; + +#ifdef CONFIG_KEEP_SERVERADDR + if (NetServerIP == NetArpWaitPacketIP) { + char buf[20]; + sprintf(buf, "%pM", arp->ar_data); + setenv("serveraddr", buf); + } +#endif + #ifdef ET_DEBUG printf("Got ARP REPLY, set server/gtwy eth addr (%pM)\n", arp->ar_data); -- cgit v1.3.1