/*
- * $Id: ipconfig.c,v 1.46 2002/02/01 22:01:04 davem Exp $
- *
* Automatic Configuration of IP -- use DHCP, BOOTP, RARP, or
* user-supplied information to configure own IP address and routes.
*
#include <linux/root_dev.h>
#include <linux/delay.h>
#include <linux/nfs_fs.h>
+#include <net/net_namespace.h>
#include <net/arp.h>
#include <net/ip.h>
#include <net/ipconfig.h>
#define CONF_NAMESERVERS_MAX 3 /* Maximum number of nameservers
- '3' from resolv.h */
-#define NONE __constant_htonl(INADDR_NONE)
+#define NONE cpu_to_be32(INADDR_NONE)
+#define ANY cpu_to_be32(INADDR_ANY)
/*
* Public IP configuration
__be32 root_server_addr = NONE; /* Address of NFS server */
u8 root_server_path[256] = { 0, }; /* Path to mount as root */
+u32 ic_dev_xid; /* Device under configuration */
+
+/* vendor class identifier */
+static char vendor_class_identifier[253] __initdata;
+
/* Persistent data: */
static int ic_proto_used; /* Protocol used, if any */
/* Protocols supported by available interfaces */
static int ic_proto_have_if __initdata = 0;
+/* MTU for boot device */
+static int ic_dev_mtu __initdata = 0;
+
#ifdef IPCONFIG_DYNAMIC
static DEFINE_SPINLOCK(ic_recv_lock);
static volatile int ic_got_reply __initdata = 0; /* Proto(s) that replied */
rtnl_lock();
/* bring loopback device up first */
- if (dev_change_flags(&loopback_dev, loopback_dev.flags | IFF_UP) < 0)
- printk(KERN_ERR "IP-Config: Failed to open %s\n", loopback_dev.name);
+ for_each_netdev(&init_net, dev) {
+ if (!(dev->flags & IFF_LOOPBACK))
+ continue;
+ if (dev_change_flags(dev, dev->flags | IFF_UP) < 0)
+ printk(KERN_ERR "IP-Config: Failed to open %s\n", dev->name);
+ }
- for (dev = dev_base; dev; dev = dev->next) {
- if (dev == &loopback_dev)
+ for_each_netdev(&init_net, dev) {
+ if (dev->flags & IFF_LOOPBACK)
continue;
if (user_dev_name[0] ? !strcmp(dev->name, user_dev_name) :
(!(dev->flags & IFF_LOOPBACK) &&
sin->sin_port = port;
}
+static int __init ic_devinet_ioctl(unsigned int cmd, struct ifreq *arg)
+{
+ int res;
+
+ mm_segment_t oldfs = get_fs();
+ set_fs(get_ds());
+ res = devinet_ioctl(&init_net, cmd, (struct ifreq __user *) arg);
+ set_fs(oldfs);
+ return res;
+}
+
static int __init ic_dev_ioctl(unsigned int cmd, struct ifreq *arg)
{
int res;
mm_segment_t oldfs = get_fs();
set_fs(get_ds());
- res = devinet_ioctl(cmd, (struct ifreq __user *) arg);
+ res = dev_ioctl(&init_net, cmd, (struct ifreq __user *) arg);
set_fs(oldfs);
return res;
}
mm_segment_t oldfs = get_fs();
set_fs(get_ds());
- res = ip_rt_ioctl(cmd, (void __user *) arg);
+ res = ip_rt_ioctl(&init_net, cmd, (void __user *) arg);
set_fs(oldfs);
return res;
}
memset(&ir, 0, sizeof(ir));
strcpy(ir.ifr_ifrn.ifrn_name, ic_dev->name);
set_sockaddr(sin, ic_myaddr, 0);
- if ((err = ic_dev_ioctl(SIOCSIFADDR, &ir)) < 0) {
+ if ((err = ic_devinet_ioctl(SIOCSIFADDR, &ir)) < 0) {
printk(KERN_ERR "IP-Config: Unable to set interface address (%d).\n", err);
return -1;
}
set_sockaddr(sin, ic_netmask, 0);
- if ((err = ic_dev_ioctl(SIOCSIFNETMASK, &ir)) < 0) {
+ if ((err = ic_devinet_ioctl(SIOCSIFNETMASK, &ir)) < 0) {
printk(KERN_ERR "IP-Config: Unable to set interface netmask (%d).\n", err);
return -1;
}
set_sockaddr(sin, ic_myaddr | ~ic_netmask, 0);
- if ((err = ic_dev_ioctl(SIOCSIFBRDADDR, &ir)) < 0) {
+ if ((err = ic_devinet_ioctl(SIOCSIFBRDADDR, &ir)) < 0) {
printk(KERN_ERR "IP-Config: Unable to set interface broadcast address (%d).\n", err);
return -1;
}
+ /* Handle the case where we need non-standard MTU on the boot link (a network
+ * using jumbo frames, for instance). If we can't set the mtu, don't error
+ * out, we'll try to muddle along.
+ */
+ if (ic_dev_mtu != 0) {
+ strcpy(ir.ifr_name, ic_dev->name);
+ ir.ifr_mtu = ic_dev_mtu;
+ if ((err = ic_dev_ioctl(SIOCSIFMTU, &ir)) < 0)
+ printk(KERN_ERR "IP-Config: Unable to set interface mtu to %d (%d).\n",
+ ic_dev_mtu, err);
+ }
return 0;
}
*/
if (!ic_host_name_set)
- sprintf(init_utsname()->nodename, "%u.%u.%u.%u", NIPQUAD(ic_myaddr));
+ sprintf(init_utsname()->nodename, "%pI4", &ic_myaddr);
if (root_server_addr == NONE)
root_server_addr = ic_servaddr;
else if (IN_CLASSC(ntohl(ic_myaddr)))
ic_netmask = htonl(IN_CLASSC_NET);
else {
- printk(KERN_ERR "IP-Config: Unable to guess netmask for address %u.%u.%u.%u\n",
- NIPQUAD(ic_myaddr));
+ printk(KERN_ERR "IP-Config: Unable to guess netmask for address %pI4\n",
+ &ic_myaddr);
return -1;
}
- printk("IP-Config: Guessing netmask %u.%u.%u.%u\n", NIPQUAD(ic_netmask));
+ printk("IP-Config: Guessing netmask %pI4\n", &ic_netmask);
}
return 0;
static int ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev);
static struct packet_type rarp_packet_type __initdata = {
- .type = __constant_htons(ETH_P_RARP),
+ .type = cpu_to_be16(ETH_P_RARP),
.func = ic_rarp_recv,
};
-static inline void ic_rarp_init(void)
+static inline void __init ic_rarp_init(void)
{
dev_add_pack(&rarp_packet_type);
}
-static inline void ic_rarp_cleanup(void)
+static inline void __init ic_rarp_cleanup(void)
{
dev_remove_pack(&rarp_packet_type);
}
unsigned char *sha, *tha; /* s for "source", t for "target" */
struct ic_device *d;
+ if (!net_eq(dev_net(dev), &init_net))
+ goto drop;
+
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
return NET_RX_DROP;
if (rarp->ar_pro != htons(ETH_P_IP))
goto drop;
- if (!pskb_may_pull(skb,
- sizeof(struct arphdr) +
- (2 * dev->addr_len) +
- (2 * 4)))
+ if (!pskb_may_pull(skb, arp_hdr_len(dev)))
goto drop;
/* OK, it is all there and looks valid, process... */
static int ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev);
static struct packet_type bootp_packet_type __initdata = {
- .type = __constant_htons(ETH_P_IP),
+ .type = cpu_to_be16(ETH_P_IP),
.func = ic_bootp_recv,
};
u8 mt = ((ic_servaddr == NONE)
? DHCPDISCOVER : DHCPREQUEST);
u8 *e = options;
+ int len;
#ifdef IPCONFIG_DEBUG
printk("DHCP: Sending message type %d\n", mt);
12, /* Host name */
15, /* Domain name */
17, /* Boot path */
+ 26, /* MTU */
40, /* NIS domain name */
};
*e++ = sizeof(ic_req_params);
memcpy(e, ic_req_params, sizeof(ic_req_params));
e += sizeof(ic_req_params);
+
+ if (*vendor_class_identifier) {
+ printk(KERN_INFO "DHCP: sending class identifier \"%s\"\n",
+ vendor_class_identifier);
+ *e++ = 60; /* Class-identifier */
+ len = strlen(vendor_class_identifier);
+ *e++ = len;
+ memcpy(e, vendor_class_identifier, len);
+ e += len;
+ }
}
*e++ = 255; /* End of the list */
/*
* Initialize the DHCP/BOOTP mechanism.
*/
-static inline void ic_bootp_init(void)
+static inline void __init ic_bootp_init(void)
{
int i;
/*
* DHCP/BOOTP cleanup.
*/
-static inline void ic_bootp_cleanup(void)
+static inline void __init ic_bootp_cleanup(void)
{
dev_remove_pack(&bootp_packet_type);
}
struct net_device *dev = d->dev;
struct sk_buff *skb;
struct bootp_pkt *b;
- int hh_len = LL_RESERVED_SPACE(dev);
struct iphdr *h;
/* Allocate packet */
- skb = alloc_skb(sizeof(struct bootp_pkt) + hh_len + 15, GFP_KERNEL);
+ skb = alloc_skb(sizeof(struct bootp_pkt) + LL_ALLOCATED_SPACE(dev) + 15,
+ GFP_KERNEL);
if (!skb)
return;
- skb_reserve(skb, hh_len);
+ skb_reserve(skb, LL_RESERVED_SPACE(dev));
b = (struct bootp_pkt *) skb_put(skb, sizeof(struct bootp_pkt));
memset(b, 0, sizeof(struct bootp_pkt));
printk("Unknown ARP type 0x%04x for device %s\n", dev->type, dev->name);
b->htype = dev->type; /* can cause undefined behavior */
}
+
+ /* server_ip and your_ip address are both already zero per RFC2131 */
b->hlen = dev->addr_len;
- b->your_ip = NONE;
- b->server_ip = NONE;
memcpy(b->hw_addr, dev->dev_addr, dev->addr_len);
b->secs = htons(jiffies_diff / HZ);
b->xid = d->xid;
/* Chain packet down the line... */
skb->dev = dev;
skb->protocol = htons(ETH_P_IP);
- if ((dev->hard_header &&
- dev->hard_header(skb, dev, ntohs(skb->protocol), dev->broadcast, dev->dev_addr, skb->len) < 0) ||
+ if (dev_hard_header(skb, dev, ntohs(skb->protocol),
+ dev->broadcast, dev->dev_addr, skb->len) < 0 ||
dev_queue_xmit(skb) < 0)
printk("E");
}
{
u8 servers;
int i;
+ u16 mtu;
#ifdef IPCONFIG_DEBUG
u8 *c;
if (!root_server_path[0])
ic_bootp_string(root_server_path, ext+1, *ext, sizeof(root_server_path));
break;
+ case 26: /* Interface MTU */
+ memcpy(&mtu, ext+1, sizeof(mtu));
+ ic_dev_mtu = ntohs(mtu);
+ break;
case 40: /* NIS Domain name (_not_ DNS) */
ic_bootp_string(utsname()->domainname, ext+1, *ext, __NEW_UTS_LEN);
break;
struct ic_device *d;
int len, ext_len;
+ if (!net_eq(dev_net(dev), &init_net))
+ goto drop;
+
/* Perform verifications before taking the lock. */
if (skb->pkt_type == PACKET_OTHERHOST)
goto drop;
goto drop_unlock;
}
+ /* Is it a reply for the device we are configuring? */
+ if (b->xid != ic_dev_xid) {
+ if (net_ratelimit())
+ printk(KERN_ERR "DHCP/BOOTP: Ignoring delayed packet \n");
+ goto drop_unlock;
+ }
+
/* Parse extensions */
if (ext_len >= 4 &&
!memcmp(b->exten, ic_bootp_cookie, 4)) { /* Check magic cookie */
ic_myaddr = b->your_ip;
ic_servaddr = server_id;
#ifdef IPCONFIG_DEBUG
- printk("DHCP: Offered address %u.%u.%u.%u",
- NIPQUAD(ic_myaddr));
- printk(" by server %u.%u.%u.%u\n",
- NIPQUAD(ic_servaddr));
+ printk("DHCP: Offered address %pI4 by server %pI4\n",
+ &ic_myaddr, &ic_servaddr);
#endif
/* The DHCP indicated server address takes
* precedence over the bootp header one if
get_random_bytes(&timeout, sizeof(timeout));
timeout = CONF_BASE_TIMEOUT + (timeout % (unsigned) CONF_TIMEOUT_RANDOM);
for (;;) {
+ /* Track the device we are configuring */
+ ic_dev_xid = d->xid;
+
#ifdef IPCONFIG_BOOTP
if (do_bootp && (d->able & IC_BOOTP))
ic_bootp_send_if(d, jiffies - start_jiffies);
return -1;
}
- printk("IP-Config: Got %s answer from %u.%u.%u.%u, ",
+ printk("IP-Config: Got %s answer from %pI4, ",
((ic_got_reply & IC_RARP) ? "RARP"
: (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"),
- NIPQUAD(ic_servaddr));
- printk("my address is %u.%u.%u.%u\n", NIPQUAD(ic_myaddr));
+ &ic_servaddr);
+ printk("my address is %pI4\n", &ic_myaddr);
return 0;
}
"domain %s\n", ic_domain);
for (i = 0; i < CONF_NAMESERVERS_MAX; i++) {
if (ic_nameservers[i] != NONE)
- seq_printf(seq,
- "nameserver %u.%u.%u.%u\n",
- NIPQUAD(ic_nameservers[i]));
+ seq_printf(seq, "nameserver %pI4\n",
+ &ic_nameservers[i]);
}
if (ic_servaddr != NONE)
- seq_printf(seq,
- "bootserver %u.%u.%u.%u\n",
- NIPQUAD(ic_servaddr));
+ seq_printf(seq, "bootserver %pI4\n",
+ &ic_servaddr);
return 0;
}
static int __init ip_auto_config(void)
{
__be32 addr;
+#ifdef IPCONFIG_DYNAMIC
+ int retries = CONF_OPEN_RETRIES;
+#endif
#ifdef CONFIG_PROC_FS
- proc_net_fops_create("pnp", S_IRUGO, &pnp_seq_fops);
+ proc_net_fops_create(&init_net, "pnp", S_IRUGO, &pnp_seq_fops);
#endif /* CONFIG_PROC_FS */
if (!ic_enable)
*/
if (ic_myaddr == NONE ||
#ifdef CONFIG_ROOT_NFS
- (MAJOR(ROOT_DEV) == UNNAMED_MAJOR
- && root_server_addr == NONE
- && ic_servaddr == NONE) ||
+ (root_server_addr == NONE
+ && ic_servaddr == NONE
+ && ROOT_DEV == Root_NFS) ||
#endif
ic_first_dev->next) {
#ifdef IPCONFIG_DYNAMIC
-
- int retries = CONF_OPEN_RETRIES;
-
if (ic_dynamic() < 0) {
ic_close_devs();
* Clue in the operator.
*/
printk("IP-Config: Complete:");
- printk("\n device=%s", ic_dev->name);
- printk(", addr=%u.%u.%u.%u", NIPQUAD(ic_myaddr));
- printk(", mask=%u.%u.%u.%u", NIPQUAD(ic_netmask));
- printk(", gw=%u.%u.%u.%u", NIPQUAD(ic_gateway));
+ printk("\n device=%s", ic_dev->name);
+ printk(", addr=%pI4", &ic_myaddr);
+ printk(", mask=%pI4", &ic_netmask);
+ printk(", gw=%pI4", &ic_gateway);
printk(",\n host=%s, domain=%s, nis-domain=%s",
utsname()->nodename, ic_domain, utsname()->domainname);
- printk(",\n bootserver=%u.%u.%u.%u", NIPQUAD(ic_servaddr));
- printk(", rootserver=%u.%u.%u.%u", NIPQUAD(root_server_addr));
+ printk(",\n bootserver=%pI4", &ic_servaddr);
+ printk(", rootserver=%pI4", &root_server_addr);
printk(", rootpath=%s", root_server_path);
+ if (ic_dev_mtu)
+ printk(", mtu=%d", ic_dev_mtu);
printk("\n");
#endif /* !SILENT */
/*
* Decode any IP configuration options in the "ip=" or "nfsaddrs=" kernel
- * command line parameter. It consists of option fields separated by colons in
- * the following order:
- *
- * <client-ip>:<server-ip>:<gw-ip>:<netmask>:<host name>:<device>:<PROTO>
- *
- * Any of the fields can be empty which means to use a default value:
- * <client-ip> - address given by BOOTP or RARP
- * <server-ip> - address of host returning BOOTP or RARP packet
- * <gw-ip> - none, or the address returned by BOOTP
- * <netmask> - automatically determined from <client-ip>, or the
- * one returned by BOOTP
- * <host name> - <client-ip> in ASCII notation, or the name returned
- * by BOOTP
- * <device> - use all available devices
- * <PROTO>:
- * off|none - don't do autoconfig at all (DEFAULT)
- * on|any - use any configured protocol
- * dhcp|bootp|rarp - use only the specified protocol
- * both - use both BOOTP and RARP (not DHCP)
+ * command line parameter. See Documentation/filesystems/nfs/nfsroot.txt.
*/
static int __init ic_proto_name(char *name)
{
if (!strcmp(name, "on") || !strcmp(name, "any")) {
return 1;
}
+ if (!strcmp(name, "off") || !strcmp(name, "none")) {
+ return 0;
+ }
#ifdef CONFIG_IP_PNP_DHCP
else if (!strcmp(name, "dhcp")) {
ic_proto_enabled &= ~IC_RARP;
int num = 0;
ic_set_manually = 1;
+ ic_enable = 1;
- ic_enable = (*addrs &&
- (strcmp(addrs, "off") != 0) &&
- (strcmp(addrs, "none") != 0));
- if (!ic_enable)
+ /*
+ * If any dhcp, bootp etc options are set, leave autoconfig on
+ * and skip the below static IP processing.
+ */
+ if (ic_proto_name(addrs))
return 1;
- if (ic_proto_name(addrs))
+ /* If no static IP is given, turn off autoconfig and bail. */
+ if (*addrs == 0 ||
+ strcmp(addrs, "off") == 0 ||
+ strcmp(addrs, "none") == 0) {
+ ic_enable = 0;
return 1;
+ }
- /* Parse the whole string */
+ /* Parse string for static IP assignment. */
ip = addrs;
while (ip && *ip) {
if ((cp = strchr(ip, ':')))
DBG(("IP-Config: Parameter #%d: `%s'\n", num, ip));
switch (num) {
case 0:
- if ((ic_myaddr = in_aton(ip)) == INADDR_ANY)
+ if ((ic_myaddr = in_aton(ip)) == ANY)
ic_myaddr = NONE;
break;
case 1:
- if ((ic_servaddr = in_aton(ip)) == INADDR_ANY)
+ if ((ic_servaddr = in_aton(ip)) == ANY)
ic_servaddr = NONE;
break;
case 2:
- if ((ic_gateway = in_aton(ip)) == INADDR_ANY)
+ if ((ic_gateway = in_aton(ip)) == ANY)
ic_gateway = NONE;
break;
case 3:
- if ((ic_netmask = in_aton(ip)) == INADDR_ANY)
+ if ((ic_netmask = in_aton(ip)) == ANY)
ic_netmask = NONE;
break;
case 4:
strlcpy(user_dev_name, ip, sizeof(user_dev_name));
break;
case 6:
- ic_proto_name(ip);
+ if (ic_proto_name(ip) == 0 &&
+ ic_myaddr == NONE) {
+ ic_enable = 0;
+ }
break;
}
}
return ip_auto_config_setup(addrs);
}
+static int __init vendor_class_identifier_setup(char *addrs)
+{
+ if (strlcpy(vendor_class_identifier, addrs,
+ sizeof(vendor_class_identifier))
+ >= sizeof(vendor_class_identifier))
+ printk(KERN_WARNING "DHCP: vendorclass too long, truncated to \"%s\"",
+ vendor_class_identifier);
+ return 1;
+}
+
__setup("ip=", ip_auto_config_setup);
__setup("nfsaddrs=", nfsaddrs_config_setup);
+__setup("dhcpclass=", vendor_class_identifier_setup);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff