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- #include <linux/types.h>
- #include <linux/string.h>
- #include <linux/kernel.h>
- #include <linux/jiffies.h>
- #include <linux/random.h>
- #include <linux/init.h>
- #include <linux/utsname.h>
- #include <linux/in.h>
- #include <linux/if.h>
- #include <linux/inet.h>
- #include <linux/inetdevice.h>
- #include <linux/netdevice.h>
- #include <linux/if_arp.h>
- #include <linux/skbuff.h>
- #include <linux/ip.h>
- #include <linux/socket.h>
- #include <linux/route.h>
- #include <linux/udp.h>
- #include <linux/proc_fs.h>
- #include <linux/seq_file.h>
- #include <linux/major.h>
- #include <linux/root_dev.h>
- #include <linux/delay.h>
- #include <linux/nfs_fs.h>
- #include <linux/slab.h>
- #include <linux/export.h>
- #include <net/net_namespace.h>
- #include <net/arp.h>
- #include <net/ip.h>
- #include <net/ipconfig.h>
- #include <net/route.h>
- #include <linux/uaccess.h>
- #include <net/checksum.h>
- #include <asm/processor.h>
- #if defined(CONFIG_IP_PNP_DHCP)
- #define IPCONFIG_DHCP
- #endif
- #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_DHCP)
- #define IPCONFIG_BOOTP
- #endif
- #if defined(CONFIG_IP_PNP_RARP)
- #define IPCONFIG_RARP
- #endif
- #if defined(IPCONFIG_BOOTP) || defined(IPCONFIG_RARP)
- #define IPCONFIG_DYNAMIC
- #endif
- #define CONF_POST_OPEN 10
- #define CONF_OPEN_RETRIES 2
- #define CONF_SEND_RETRIES 6
- #define CONF_BASE_TIMEOUT (HZ*2)
- #define CONF_TIMEOUT_RANDOM (HZ)
- #define CONF_TIMEOUT_MULT *7/4
- #define CONF_TIMEOUT_MAX (HZ*30)
- #define CONF_NAMESERVERS_MAX 3
- #define CONF_NTP_SERVERS_MAX 3
- #define NONE cpu_to_be32(INADDR_NONE)
- #define ANY cpu_to_be32(INADDR_ANY)
- static unsigned int carrier_timeout = 120;
- int ic_set_manually __initdata = 0;
- static int ic_enable __initdata;
- int ic_proto_enabled __initdata = 0
- #ifdef IPCONFIG_BOOTP
- | IC_BOOTP
- #endif
- #ifdef CONFIG_IP_PNP_DHCP
- | IC_USE_DHCP
- #endif
- #ifdef IPCONFIG_RARP
- | IC_RARP
- #endif
- ;
- static int ic_host_name_set __initdata;
- __be32 ic_myaddr = NONE;
- static __be32 ic_netmask = NONE;
- __be32 ic_gateway = NONE;
- #ifdef IPCONFIG_DYNAMIC
- static __be32 ic_addrservaddr = NONE;
- #endif
- __be32 ic_servaddr = NONE;
- __be32 root_server_addr = NONE;
- u8 root_server_path[256] = { 0, };
- static char vendor_class_identifier[253] __initdata;
- #if defined(CONFIG_IP_PNP_DHCP)
- static char dhcp_client_identifier[253] __initdata;
- #endif
- #ifdef IPCONFIG_DYNAMIC
- static int ic_proto_used;
- #else
- #define ic_proto_used 0
- #endif
- static __be32 ic_nameservers[CONF_NAMESERVERS_MAX];
- static __be32 ic_ntp_servers[CONF_NTP_SERVERS_MAX];
- static u8 ic_domain[64];
- static char user_dev_name[IFNAMSIZ] __initdata = { 0, };
- static int ic_proto_have_if __initdata;
- static int ic_dev_mtu __initdata;
- #ifdef IPCONFIG_DYNAMIC
- static DEFINE_SPINLOCK(ic_recv_lock);
- static volatile int ic_got_reply __initdata;
- #endif
- #ifdef IPCONFIG_DHCP
- static int ic_dhcp_msgtype __initdata;
- #endif
- struct ic_device {
- struct ic_device *next;
- struct net_device *dev;
- unsigned short flags;
- short able;
- __be32 xid;
- };
- static struct ic_device *ic_first_dev __initdata;
- static struct ic_device *ic_dev __initdata;
- static bool __init ic_is_init_dev(struct net_device *dev)
- {
- if (dev->flags & IFF_LOOPBACK)
- return false;
- return user_dev_name[0] ? !strcmp(dev->name, user_dev_name) :
- (!(dev->flags & IFF_LOOPBACK) &&
- (dev->flags & (IFF_POINTOPOINT|IFF_BROADCAST)) &&
- strncmp(dev->name, "dummy", 5));
- }
- static int __init ic_open_devs(void)
- {
- struct ic_device *d, **last;
- struct net_device *dev;
- unsigned short oflags;
- unsigned long start, next_msg;
- last = &ic_first_dev;
- rtnl_lock();
-
- for_each_netdev(&init_net, dev) {
- if (!(dev->flags & IFF_LOOPBACK))
- continue;
- if (dev_change_flags(dev, dev->flags | IFF_UP, NULL) < 0)
- pr_err("IP-Config: Failed to open %s\n", dev->name);
- }
- for_each_netdev(&init_net, dev) {
- if (ic_is_init_dev(dev)) {
- int able = 0;
- if (dev->mtu >= 364)
- able |= IC_BOOTP;
- else
- pr_warn("DHCP/BOOTP: Ignoring device %s, MTU %d too small\n",
- dev->name, dev->mtu);
- if (!(dev->flags & IFF_NOARP))
- able |= IC_RARP;
- able &= ic_proto_enabled;
- if (ic_proto_enabled && !able)
- continue;
- oflags = dev->flags;
- if (dev_change_flags(dev, oflags | IFF_UP, NULL) < 0) {
- pr_err("IP-Config: Failed to open %s\n",
- dev->name);
- continue;
- }
- if (!(d = kmalloc(sizeof(struct ic_device), GFP_KERNEL))) {
- rtnl_unlock();
- return -ENOMEM;
- }
- d->dev = dev;
- *last = d;
- last = &d->next;
- d->flags = oflags;
- d->able = able;
- if (able & IC_BOOTP)
- get_random_bytes(&d->xid, sizeof(__be32));
- else
- d->xid = 0;
- ic_proto_have_if |= able;
- pr_debug("IP-Config: %s UP (able=%d, xid=%08x)\n",
- dev->name, able, d->xid);
- }
- }
-
- rtnl_unlock();
-
- if (!ic_first_dev)
- goto have_carrier;
-
- start = jiffies;
- next_msg = start + msecs_to_jiffies(20000);
- while (time_before(jiffies, start +
- msecs_to_jiffies(carrier_timeout * 1000))) {
- int wait, elapsed;
- rtnl_lock();
- for_each_netdev(&init_net, dev)
- if (ic_is_init_dev(dev) && netif_carrier_ok(dev)) {
- rtnl_unlock();
- goto have_carrier;
- }
- rtnl_unlock();
- msleep(1);
- if (time_before(jiffies, next_msg))
- continue;
- elapsed = jiffies_to_msecs(jiffies - start);
- wait = (carrier_timeout * 1000 - elapsed + 500) / 1000;
- pr_info("Waiting up to %d more seconds for network.\n", wait);
- next_msg = jiffies + msecs_to_jiffies(20000);
- }
- have_carrier:
- *last = NULL;
- if (!ic_first_dev) {
- if (user_dev_name[0])
- pr_err("IP-Config: Device `%s' not found\n",
- user_dev_name);
- else
- pr_err("IP-Config: No network devices available\n");
- return -ENODEV;
- }
- return 0;
- }
- static void __init ic_close_devs(void)
- {
- struct net_device *selected_dev = ic_dev ? ic_dev->dev : NULL;
- struct ic_device *d, *next;
- struct net_device *dev;
- rtnl_lock();
- next = ic_first_dev;
- while ((d = next)) {
- bool bring_down = (d != ic_dev);
- struct net_device *lower;
- struct list_head *iter;
- next = d->next;
- dev = d->dev;
- if (selected_dev) {
- netdev_for_each_lower_dev(selected_dev, lower, iter) {
- if (dev == lower) {
- bring_down = false;
- break;
- }
- }
- }
- if (bring_down) {
- pr_debug("IP-Config: Downing %s\n", dev->name);
- dev_change_flags(dev, d->flags, NULL);
- }
- kfree(d);
- }
- rtnl_unlock();
- }
- static inline void
- set_sockaddr(struct sockaddr_in *sin, __be32 addr, __be16 port)
- {
- sin->sin_family = AF_INET;
- sin->sin_addr.s_addr = addr;
- sin->sin_port = port;
- }
- static int __init ic_setup_if(void)
- {
- struct ifreq ir;
- struct sockaddr_in *sin = (void *) &ir.ifr_ifru.ifru_addr;
- int err;
- memset(&ir, 0, sizeof(ir));
- strcpy(ir.ifr_ifrn.ifrn_name, ic_dev->dev->name);
- set_sockaddr(sin, ic_myaddr, 0);
- if ((err = devinet_ioctl(&init_net, SIOCSIFADDR, &ir)) < 0) {
- pr_err("IP-Config: Unable to set interface address (%d)\n",
- err);
- return -1;
- }
- set_sockaddr(sin, ic_netmask, 0);
- if ((err = devinet_ioctl(&init_net, SIOCSIFNETMASK, &ir)) < 0) {
- pr_err("IP-Config: Unable to set interface netmask (%d)\n",
- err);
- return -1;
- }
- set_sockaddr(sin, ic_myaddr | ~ic_netmask, 0);
- if ((err = devinet_ioctl(&init_net, SIOCSIFBRDADDR, &ir)) < 0) {
- pr_err("IP-Config: Unable to set interface broadcast address (%d)\n",
- err);
- return -1;
- }
-
- if (ic_dev_mtu != 0) {
- rtnl_lock();
- if ((err = dev_set_mtu(ic_dev->dev, ic_dev_mtu)) < 0)
- pr_err("IP-Config: Unable to set interface mtu to %d (%d)\n",
- ic_dev_mtu, err);
- rtnl_unlock();
- }
- return 0;
- }
- static int __init ic_setup_routes(void)
- {
-
- if (ic_gateway != NONE) {
- struct rtentry rm;
- int err;
- memset(&rm, 0, sizeof(rm));
- if ((ic_gateway ^ ic_myaddr) & ic_netmask) {
- pr_err("IP-Config: Gateway not on directly connected network\n");
- return -1;
- }
- set_sockaddr((struct sockaddr_in *) &rm.rt_dst, 0, 0);
- set_sockaddr((struct sockaddr_in *) &rm.rt_genmask, 0, 0);
- set_sockaddr((struct sockaddr_in *) &rm.rt_gateway, ic_gateway, 0);
- rm.rt_flags = RTF_UP | RTF_GATEWAY;
- if ((err = ip_rt_ioctl(&init_net, SIOCADDRT, &rm)) < 0) {
- pr_err("IP-Config: Cannot add default route (%d)\n",
- err);
- return -1;
- }
- }
- return 0;
- }
- static int __init ic_defaults(void)
- {
-
- if (!ic_host_name_set)
- sprintf(init_utsname()->nodename, "%pI4", &ic_myaddr);
- if (root_server_addr == NONE)
- root_server_addr = ic_servaddr;
- if (ic_netmask == NONE) {
- if (IN_CLASSA(ntohl(ic_myaddr)))
- ic_netmask = htonl(IN_CLASSA_NET);
- else if (IN_CLASSB(ntohl(ic_myaddr)))
- ic_netmask = htonl(IN_CLASSB_NET);
- else if (IN_CLASSC(ntohl(ic_myaddr)))
- ic_netmask = htonl(IN_CLASSC_NET);
- else if (IN_CLASSE(ntohl(ic_myaddr)))
- ic_netmask = htonl(IN_CLASSE_NET);
- else {
- pr_err("IP-Config: Unable to guess netmask for address %pI4\n",
- &ic_myaddr);
- return -1;
- }
- pr_notice("IP-Config: Guessing netmask %pI4\n",
- &ic_netmask);
- }
- return 0;
- }
- #ifdef IPCONFIG_RARP
- 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 = cpu_to_be16(ETH_P_RARP),
- .func = ic_rarp_recv,
- };
- static inline void __init ic_rarp_init(void)
- {
- dev_add_pack(&rarp_packet_type);
- }
- static inline void __init ic_rarp_cleanup(void)
- {
- dev_remove_pack(&rarp_packet_type);
- }
- static int __init
- ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
- {
- struct arphdr *rarp;
- unsigned char *rarp_ptr;
- __be32 sip, tip;
- unsigned char *tha;
- struct ic_device *d;
- if (!net_eq(dev_net(dev), &init_net))
- goto drop;
- skb = skb_share_check(skb, GFP_ATOMIC);
- if (!skb)
- return NET_RX_DROP;
- if (!pskb_may_pull(skb, sizeof(struct arphdr)))
- goto drop;
-
- rarp = (struct arphdr *)skb_transport_header(skb);
-
- if (rarp->ar_hln != dev->addr_len || dev->type != ntohs(rarp->ar_hrd))
- goto drop;
-
- if (rarp->ar_op != htons(ARPOP_RREPLY))
- goto drop;
-
- if (rarp->ar_pro != htons(ETH_P_IP))
- goto drop;
- if (!pskb_may_pull(skb, arp_hdr_len(dev)))
- goto drop;
-
- rarp = (struct arphdr *)skb_transport_header(skb);
- rarp_ptr = (unsigned char *) (rarp + 1);
-
- spin_lock(&ic_recv_lock);
-
- if (ic_got_reply)
- goto drop_unlock;
-
- d = ic_first_dev;
- while (d && d->dev != dev)
- d = d->next;
- if (!d)
- goto drop_unlock;
-
- rarp_ptr += dev->addr_len;
- memcpy(&sip, rarp_ptr, 4);
- rarp_ptr += 4;
- tha = rarp_ptr;
- rarp_ptr += dev->addr_len;
- memcpy(&tip, rarp_ptr, 4);
-
- if (memcmp(tha, dev->dev_addr, dev->addr_len))
- goto drop_unlock;
-
- if (ic_servaddr != NONE && ic_servaddr != sip)
- goto drop_unlock;
-
- ic_dev = d;
- if (ic_myaddr == NONE)
- ic_myaddr = tip;
- ic_servaddr = sip;
- ic_addrservaddr = sip;
- ic_got_reply = IC_RARP;
- drop_unlock:
-
- spin_unlock(&ic_recv_lock);
- drop:
-
- kfree_skb(skb);
- return 0;
- }
- static void __init ic_rarp_send_if(struct ic_device *d)
- {
- struct net_device *dev = d->dev;
- arp_send(ARPOP_RREQUEST, ETH_P_RARP, 0, dev, 0, NULL,
- dev->dev_addr, dev->dev_addr);
- }
- #endif
- static inline void __init ic_nameservers_predef(void)
- {
- int i;
- for (i = 0; i < CONF_NAMESERVERS_MAX; i++)
- ic_nameservers[i] = NONE;
- }
- static inline void __init ic_ntp_servers_predef(void)
- {
- int i;
- for (i = 0; i < CONF_NTP_SERVERS_MAX; i++)
- ic_ntp_servers[i] = NONE;
- }
- #ifdef IPCONFIG_BOOTP
- struct bootp_pkt {
- struct iphdr iph;
- struct udphdr udph;
- u8 op;
- u8 htype;
- u8 hlen;
- u8 hops;
- __be32 xid;
- __be16 secs;
- __be16 flags;
- __be32 client_ip;
- __be32 your_ip;
- __be32 server_ip;
- __be32 relay_ip;
- u8 hw_addr[16];
- u8 serv_name[64];
- u8 boot_file[128];
- u8 exten[312];
- };
- #define BOOTP_REQUEST 1
- #define BOOTP_REPLY 2
- #define DHCPDISCOVER 1
- #define DHCPOFFER 2
- #define DHCPREQUEST 3
- #define DHCPDECLINE 4
- #define DHCPACK 5
- #define DHCPNAK 6
- #define DHCPRELEASE 7
- #define DHCPINFORM 8
- 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 = cpu_to_be16(ETH_P_IP),
- .func = ic_bootp_recv,
- };
- static const u8 ic_bootp_cookie[4] = { 99, 130, 83, 99 };
- #ifdef IPCONFIG_DHCP
- static void __init
- ic_dhcp_init_options(u8 *options, struct ic_device *d)
- {
- u8 mt = ((ic_servaddr == NONE)
- ? DHCPDISCOVER : DHCPREQUEST);
- u8 *e = options;
- int len;
- pr_debug("DHCP: Sending message type %d (%s)\n", mt, d->dev->name);
- memcpy(e, ic_bootp_cookie, 4);
- e += 4;
- *e++ = 53;
- *e++ = 1;
- *e++ = mt;
- if (mt == DHCPREQUEST) {
- *e++ = 54;
- *e++ = 4;
- memcpy(e, &ic_servaddr, 4);
- e += 4;
- *e++ = 50;
- *e++ = 4;
- memcpy(e, &ic_myaddr, 4);
- e += 4;
- }
-
- {
- static const u8 ic_req_params[] = {
- 1,
- 3,
- 6,
- 12,
- 15,
- 17,
- 26,
- 40,
- 42,
- };
- *e++ = 55;
- *e++ = sizeof(ic_req_params);
- memcpy(e, ic_req_params, sizeof(ic_req_params));
- e += sizeof(ic_req_params);
- if (ic_host_name_set) {
- *e++ = 12;
- len = strlen(utsname()->nodename);
- *e++ = len;
- memcpy(e, utsname()->nodename, len);
- e += len;
- }
- if (*vendor_class_identifier) {
- pr_info("DHCP: sending class identifier \"%s\"\n",
- vendor_class_identifier);
- *e++ = 60;
- len = strlen(vendor_class_identifier);
- *e++ = len;
- memcpy(e, vendor_class_identifier, len);
- e += len;
- }
- len = strlen(dhcp_client_identifier + 1);
-
- if (len >= 1 && len < 312 - (e - options) - 1) {
- *e++ = 61;
- *e++ = len + 1;
- memcpy(e, dhcp_client_identifier, len + 1);
- e += len + 1;
- }
- }
- *e++ = 255;
- }
- #endif
- static void __init ic_bootp_init_ext(u8 *e)
- {
- memcpy(e, ic_bootp_cookie, 4);
- e += 4;
- *e++ = 1;
- *e++ = 4;
- e += 4;
- *e++ = 3;
- *e++ = 4;
- e += 4;
- #if CONF_NAMESERVERS_MAX > 0
- *e++ = 6;
- *e++ = 4 * CONF_NAMESERVERS_MAX;
- e += 4 * CONF_NAMESERVERS_MAX;
- #endif
- *e++ = 12;
- *e++ = 32;
- e += 32;
- *e++ = 40;
- *e++ = 32;
- e += 32;
- *e++ = 17;
- *e++ = 40;
- e += 40;
- *e++ = 57;
- *e++ = 2;
- *e++ = 1;
- *e++ = 150;
- *e++ = 255;
- }
- static inline void __init ic_bootp_init(void)
- {
-
- ic_nameservers_predef();
- ic_ntp_servers_predef();
- dev_add_pack(&bootp_packet_type);
- }
- static inline void __init ic_bootp_cleanup(void)
- {
- dev_remove_pack(&bootp_packet_type);
- }
- static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_diff)
- {
- struct net_device *dev = d->dev;
- struct sk_buff *skb;
- struct bootp_pkt *b;
- struct iphdr *h;
- int hlen = LL_RESERVED_SPACE(dev);
- int tlen = dev->needed_tailroom;
-
- skb = alloc_skb(sizeof(struct bootp_pkt) + hlen + tlen + 15,
- GFP_KERNEL);
- if (!skb)
- return;
- skb_reserve(skb, hlen);
- b = skb_put_zero(skb, sizeof(struct bootp_pkt));
-
- skb_reset_network_header(skb);
- h = ip_hdr(skb);
- h->version = 4;
- h->ihl = 5;
- h->tot_len = htons(sizeof(struct bootp_pkt));
- h->frag_off = htons(IP_DF);
- h->ttl = 64;
- h->protocol = IPPROTO_UDP;
- h->daddr = htonl(INADDR_BROADCAST);
- h->check = ip_fast_csum((unsigned char *) h, h->ihl);
-
- b->udph.source = htons(68);
- b->udph.dest = htons(67);
- b->udph.len = htons(sizeof(struct bootp_pkt) - sizeof(struct iphdr));
-
-
- b->op = BOOTP_REQUEST;
- if (dev->type < 256)
- b->htype = dev->type;
- else if (dev->type == ARPHRD_FDDI)
- b->htype = ARPHRD_ETHER;
- else {
- pr_warn("Unknown ARP type 0x%04x for device %s\n", dev->type,
- dev->name);
- b->htype = dev->type;
- }
-
- b->hlen = dev->addr_len;
- memcpy(b->hw_addr, dev->dev_addr, dev->addr_len);
- b->secs = htons(jiffies_diff / HZ);
- b->xid = d->xid;
-
- #ifdef IPCONFIG_DHCP
- if (ic_proto_enabled & IC_USE_DHCP)
- ic_dhcp_init_options(b->exten, d);
- else
- #endif
- ic_bootp_init_ext(b->exten);
-
- skb->dev = dev;
- skb->protocol = htons(ETH_P_IP);
- if (dev_hard_header(skb, dev, ntohs(skb->protocol),
- dev->broadcast, dev->dev_addr, skb->len) < 0) {
- kfree_skb(skb);
- printk("E");
- return;
- }
- if (dev_queue_xmit(skb) < 0)
- printk("E");
- }
- static int __init ic_bootp_string(char *dest, char *src, int len, int max)
- {
- if (!len)
- return 0;
- if (len > max-1)
- len = max-1;
- memcpy(dest, src, len);
- dest[len] = '\0';
- return 1;
- }
- static void __init ic_do_bootp_ext(u8 *ext)
- {
- u8 servers;
- int i;
- __be16 mtu;
- u8 *c;
- pr_debug("DHCP/BOOTP: Got extension %d:", *ext);
- for (c=ext+2; c<ext+2+ext[1]; c++)
- pr_debug(" %02x", *c);
- pr_debug("\n");
- switch (*ext++) {
- case 1:
- if (ic_netmask == NONE)
- memcpy(&ic_netmask, ext+1, 4);
- break;
- case 3:
- if (ic_gateway == NONE)
- memcpy(&ic_gateway, ext+1, 4);
- break;
- case 6:
- servers= *ext/4;
- if (servers > CONF_NAMESERVERS_MAX)
- servers = CONF_NAMESERVERS_MAX;
- for (i = 0; i < servers; i++) {
- if (ic_nameservers[i] == NONE)
- memcpy(&ic_nameservers[i], ext+1+4*i, 4);
- }
- break;
- case 12:
- if (!ic_host_name_set) {
- ic_bootp_string(utsname()->nodename, ext+1, *ext,
- __NEW_UTS_LEN);
- ic_host_name_set = 1;
- }
- break;
- case 15:
- if (!ic_domain[0])
- ic_bootp_string(ic_domain, ext+1, *ext, sizeof(ic_domain));
- break;
- case 17:
- if (!root_server_path[0])
- ic_bootp_string(root_server_path, ext+1, *ext,
- sizeof(root_server_path));
- break;
- case 26:
- memcpy(&mtu, ext+1, sizeof(mtu));
- ic_dev_mtu = ntohs(mtu);
- break;
- case 40:
- ic_bootp_string(utsname()->domainname, ext+1, *ext,
- __NEW_UTS_LEN);
- break;
- case 42:
- servers = *ext / 4;
- if (servers > CONF_NTP_SERVERS_MAX)
- servers = CONF_NTP_SERVERS_MAX;
- for (i = 0; i < servers; i++) {
- if (ic_ntp_servers[i] == NONE)
- memcpy(&ic_ntp_servers[i], ext+1+4*i, 4);
- }
- break;
- }
- }
- static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
- {
- struct bootp_pkt *b;
- struct iphdr *h;
- struct ic_device *d;
- int len, ext_len;
- if (!net_eq(dev_net(dev), &init_net))
- goto drop;
-
- if (skb->pkt_type == PACKET_OTHERHOST)
- goto drop;
- skb = skb_share_check(skb, GFP_ATOMIC);
- if (!skb)
- return NET_RX_DROP;
- if (!pskb_may_pull(skb,
- sizeof(struct iphdr) +
- sizeof(struct udphdr)))
- goto drop;
- b = (struct bootp_pkt *)skb_network_header(skb);
- h = &b->iph;
- if (h->ihl != 5 || h->version != 4 || h->protocol != IPPROTO_UDP)
- goto drop;
-
- if (ip_is_fragment(h)) {
- net_err_ratelimited("DHCP/BOOTP: Ignoring fragmented reply\n");
- goto drop;
- }
- if (skb->len < ntohs(h->tot_len))
- goto drop;
- if (ip_fast_csum((char *) h, h->ihl))
- goto drop;
- if (b->udph.source != htons(67) || b->udph.dest != htons(68))
- goto drop;
- if (ntohs(h->tot_len) < ntohs(b->udph.len) + sizeof(struct iphdr))
- goto drop;
- len = ntohs(b->udph.len) - sizeof(struct udphdr);
- ext_len = len - (sizeof(*b) -
- sizeof(struct iphdr) -
- sizeof(struct udphdr) -
- sizeof(b->exten));
- if (ext_len < 0)
- goto drop;
-
- if (!pskb_may_pull(skb, skb->len))
- goto drop;
- b = (struct bootp_pkt *)skb_network_header(skb);
- h = &b->iph;
-
- spin_lock(&ic_recv_lock);
-
- if (ic_got_reply)
- goto drop_unlock;
-
- d = ic_first_dev;
- while (d && d->dev != dev)
- d = d->next;
- if (!d)
- goto drop_unlock;
-
- if (b->op != BOOTP_REPLY ||
- b->xid != d->xid) {
- net_err_ratelimited("DHCP/BOOTP: Reply not for us on %s, op[%x] xid[%x]\n",
- d->dev->name, b->op, b->xid);
- goto drop_unlock;
- }
-
- if (ext_len >= 4 &&
- !memcmp(b->exten, ic_bootp_cookie, 4)) {
- u8 *end = (u8 *) b + ntohs(b->iph.tot_len);
- u8 *ext;
- #ifdef IPCONFIG_DHCP
- if (ic_proto_enabled & IC_USE_DHCP) {
- __be32 server_id = NONE;
- int mt = 0;
- ext = &b->exten[4];
- while (ext < end && *ext != 0xff) {
- u8 *opt = ext++;
- if (*opt == 0)
- continue;
- ext += *ext + 1;
- if (ext >= end)
- break;
- switch (*opt) {
- case 53:
- if (opt[1])
- mt = opt[2];
- break;
- case 54:
- if (opt[1] >= 4)
- memcpy(&server_id, opt + 2, 4);
- break;
- }
- }
- pr_debug("DHCP: Got message type %d (%s)\n", mt, d->dev->name);
- switch (mt) {
- case DHCPOFFER:
-
- if (ic_myaddr != NONE)
- goto drop_unlock;
-
- ic_myaddr = b->your_ip;
- ic_servaddr = server_id;
- pr_debug("DHCP: Offered address %pI4 by server %pI4\n",
- &ic_myaddr, &b->iph.saddr);
-
- if ((server_id != NONE) &&
- (b->server_ip != server_id))
- b->server_ip = ic_servaddr;
- break;
- case DHCPACK:
- if (memcmp(dev->dev_addr, b->hw_addr, dev->addr_len) != 0)
- goto drop_unlock;
-
- break;
- default:
-
- ic_myaddr = NONE;
- ic_servaddr = NONE;
- goto drop_unlock;
- }
- ic_dhcp_msgtype = mt;
- }
- #endif
- ext = &b->exten[4];
- while (ext < end && *ext != 0xff) {
- u8 *opt = ext++;
- if (*opt == 0)
- continue;
- ext += *ext + 1;
- if (ext < end)
- ic_do_bootp_ext(opt);
- }
- }
-
- ic_dev = d;
- ic_myaddr = b->your_ip;
- ic_servaddr = b->server_ip;
- ic_addrservaddr = b->iph.saddr;
- if (ic_gateway == NONE && b->relay_ip)
- ic_gateway = b->relay_ip;
- if (ic_nameservers[0] == NONE)
- ic_nameservers[0] = ic_servaddr;
- ic_got_reply = IC_BOOTP;
- drop_unlock:
-
- spin_unlock(&ic_recv_lock);
- drop:
-
- kfree_skb(skb);
- return 0;
- }
- #endif
- #ifdef IPCONFIG_DYNAMIC
- static int __init ic_dynamic(void)
- {
- int retries;
- struct ic_device *d;
- unsigned long start_jiffies, timeout, jiff;
- int do_bootp = ic_proto_have_if & IC_BOOTP;
- int do_rarp = ic_proto_have_if & IC_RARP;
-
- if (!ic_proto_enabled) {
- pr_err("IP-Config: Incomplete network configuration information\n");
- return -1;
- }
- #ifdef IPCONFIG_BOOTP
- if ((ic_proto_enabled ^ ic_proto_have_if) & IC_BOOTP)
- pr_err("DHCP/BOOTP: No suitable device found\n");
- #endif
- #ifdef IPCONFIG_RARP
- if ((ic_proto_enabled ^ ic_proto_have_if) & IC_RARP)
- pr_err("RARP: No suitable device found\n");
- #endif
- if (!ic_proto_have_if)
-
- return -1;
-
- #ifdef IPCONFIG_BOOTP
- if (do_bootp)
- ic_bootp_init();
- #endif
- #ifdef IPCONFIG_RARP
- if (do_rarp)
- ic_rarp_init();
- #endif
-
- pr_notice("Sending %s%s%s requests .",
- do_bootp
- ? ((ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP") : "",
- (do_bootp && do_rarp) ? " and " : "",
- do_rarp ? "RARP" : "");
- start_jiffies = jiffies;
- d = ic_first_dev;
- retries = CONF_SEND_RETRIES;
- get_random_bytes(&timeout, sizeof(timeout));
- timeout = CONF_BASE_TIMEOUT + (timeout % (unsigned int) CONF_TIMEOUT_RANDOM);
- for (;;) {
- #ifdef IPCONFIG_BOOTP
- if (do_bootp && (d->able & IC_BOOTP))
- ic_bootp_send_if(d, jiffies - start_jiffies);
- #endif
- #ifdef IPCONFIG_RARP
- if (do_rarp && (d->able & IC_RARP))
- ic_rarp_send_if(d);
- #endif
- if (!d->next) {
- jiff = jiffies + timeout;
- while (time_before(jiffies, jiff) && !ic_got_reply)
- schedule_timeout_uninterruptible(1);
- }
- #ifdef IPCONFIG_DHCP
-
- if ((ic_got_reply & IC_BOOTP) &&
- (ic_proto_enabled & IC_USE_DHCP) &&
- ic_dhcp_msgtype != DHCPACK) {
- ic_got_reply = 0;
-
- d = ic_dev;
- pr_cont(",");
- continue;
- }
- #endif
- if (ic_got_reply) {
- pr_cont(" OK\n");
- break;
- }
- if ((d = d->next))
- continue;
- if (! --retries) {
- pr_cont(" timed out!\n");
- break;
- }
- d = ic_first_dev;
- timeout = timeout CONF_TIMEOUT_MULT;
- if (timeout > CONF_TIMEOUT_MAX)
- timeout = CONF_TIMEOUT_MAX;
- pr_cont(".");
- }
- #ifdef IPCONFIG_BOOTP
- if (do_bootp)
- ic_bootp_cleanup();
- #endif
- #ifdef IPCONFIG_RARP
- if (do_rarp)
- ic_rarp_cleanup();
- #endif
- if (!ic_got_reply) {
- ic_myaddr = NONE;
- return -1;
- }
- pr_info("IP-Config: Got %s answer from %pI4, my address is %pI4\n",
- ((ic_got_reply & IC_RARP) ? "RARP"
- : (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"),
- &ic_addrservaddr, &ic_myaddr);
- return 0;
- }
- #endif
- #ifdef CONFIG_PROC_FS
- static struct proc_dir_entry *ipconfig_dir;
- static int pnp_seq_show(struct seq_file *seq, void *v)
- {
- int i;
- if (ic_proto_used & IC_PROTO)
- seq_printf(seq, "#PROTO: %s\n",
- (ic_proto_used & IC_RARP) ? "RARP"
- : (ic_proto_used & IC_USE_DHCP) ? "DHCP" : "BOOTP");
- else
- seq_puts(seq, "#MANUAL\n");
- if (ic_domain[0])
- seq_printf(seq,
- "domain %s\n", ic_domain);
- for (i = 0; i < CONF_NAMESERVERS_MAX; i++) {
- if (ic_nameservers[i] != NONE)
- seq_printf(seq, "nameserver %pI4\n",
- &ic_nameservers[i]);
- }
- if (ic_servaddr != NONE)
- seq_printf(seq, "bootserver %pI4\n",
- &ic_servaddr);
- return 0;
- }
- static int __init ipconfig_proc_net_init(void)
- {
- ipconfig_dir = proc_net_mkdir(&init_net, "ipconfig", init_net.proc_net);
- if (!ipconfig_dir)
- return -ENOMEM;
- return 0;
- }
- static int ipconfig_proc_net_create(const char *name,
- const struct proc_ops *proc_ops)
- {
- char *pname;
- struct proc_dir_entry *p;
- if (!ipconfig_dir)
- return -ENOMEM;
- pname = kasprintf(GFP_KERNEL, "%s%s", "ipconfig/", name);
- if (!pname)
- return -ENOMEM;
- p = proc_create(pname, 0444, init_net.proc_net, proc_ops);
- kfree(pname);
- if (!p)
- return -ENOMEM;
- return 0;
- }
- static int ntp_servers_show(struct seq_file *seq, void *v)
- {
- int i;
- for (i = 0; i < CONF_NTP_SERVERS_MAX; i++) {
- if (ic_ntp_servers[i] != NONE)
- seq_printf(seq, "%pI4\n", &ic_ntp_servers[i]);
- }
- return 0;
- }
- DEFINE_PROC_SHOW_ATTRIBUTE(ntp_servers);
- #endif
- __be32 __init root_nfs_parse_addr(char *name)
- {
- __be32 addr;
- int octets = 0;
- char *cp, *cq;
- cp = cq = name;
- while (octets < 4) {
- while (*cp >= '0' && *cp <= '9')
- cp++;
- if (cp == cq || cp - cq > 3)
- break;
- if (*cp == '.' || octets == 3)
- octets++;
- if (octets < 4)
- cp++;
- cq = cp;
- }
- if (octets == 4 && (*cp == ':' || *cp == '\0')) {
- if (*cp == ':')
- *cp++ = '\0';
- addr = in_aton(name);
- memmove(name, cp, strlen(cp) + 1);
- } else
- addr = NONE;
- return addr;
- }
- #define DEVICE_WAIT_MAX 12
- static int __init wait_for_devices(void)
- {
- int i;
- bool try_init_devs = true;
- for (i = 0; i < DEVICE_WAIT_MAX; i++) {
- struct net_device *dev;
- int found = 0;
-
- wait_for_device_probe();
- rtnl_lock();
- for_each_netdev(&init_net, dev) {
- if (ic_is_init_dev(dev)) {
- found = 1;
- break;
- }
- }
- rtnl_unlock();
- if (found)
- return 0;
- if (try_init_devs &&
- (ROOT_DEV == Root_NFS || ROOT_DEV == Root_CIFS)) {
- try_init_devs = false;
- wait_for_init_devices_probe();
- }
- ssleep(1);
- }
- return -ENODEV;
- }
- static int __init ip_auto_config(void)
- {
- __be32 addr;
- #ifdef IPCONFIG_DYNAMIC
- int retries = CONF_OPEN_RETRIES;
- #endif
- int err;
- unsigned int i, count;
-
- if (ic_set_manually == 0) {
- ic_nameservers_predef();
- ic_ntp_servers_predef();
- }
- #ifdef CONFIG_PROC_FS
- proc_create_single("pnp", 0444, init_net.proc_net, pnp_seq_show);
- if (ipconfig_proc_net_init() == 0)
- ipconfig_proc_net_create("ntp_servers", &ntp_servers_proc_ops);
- #endif
- if (!ic_enable)
- return 0;
- pr_debug("IP-Config: Entered.\n");
- #ifdef IPCONFIG_DYNAMIC
- try_try_again:
- #endif
-
- err = wait_for_devices();
- if (err)
- return err;
-
- err = ic_open_devs();
- if (err)
- return err;
-
- msleep(CONF_POST_OPEN);
-
- if (ic_myaddr == NONE ||
- #if defined(CONFIG_ROOT_NFS) || defined(CONFIG_CIFS_ROOT)
- (root_server_addr == NONE &&
- ic_servaddr == NONE &&
- (ROOT_DEV == Root_NFS || ROOT_DEV == Root_CIFS)) ||
- #endif
- ic_first_dev->next) {
- #ifdef IPCONFIG_DYNAMIC
- if (ic_dynamic() < 0) {
- ic_close_devs();
-
- #ifdef CONFIG_ROOT_NFS
- if (ROOT_DEV == Root_NFS) {
- pr_err("IP-Config: Retrying forever (NFS root)...\n");
- goto try_try_again;
- }
- #endif
- #ifdef CONFIG_CIFS_ROOT
- if (ROOT_DEV == Root_CIFS) {
- pr_err("IP-Config: Retrying forever (CIFS root)...\n");
- goto try_try_again;
- }
- #endif
- if (--retries) {
- pr_err("IP-Config: Reopening network devices...\n");
- goto try_try_again;
- }
-
- pr_err("IP-Config: Auto-configuration of network failed\n");
- return -1;
- }
- #else
- pr_err("IP-Config: Incomplete network configuration information\n");
- ic_close_devs();
- return -1;
- #endif
- } else {
-
- ic_dev = ic_first_dev;
- }
- addr = root_nfs_parse_addr(root_server_path);
- if (root_server_addr == NONE)
- root_server_addr = addr;
-
- if (ic_defaults() < 0)
- return -1;
-
- #ifdef IPCONFIG_DYNAMIC
- ic_proto_used = ic_got_reply | (ic_proto_enabled & IC_USE_DHCP);
- #endif
- #ifndef IPCONFIG_SILENT
-
- pr_info("IP-Config: Complete:\n");
- pr_info(" device=%s, hwaddr=%*phC, ipaddr=%pI4, mask=%pI4, gw=%pI4\n",
- ic_dev->dev->name, ic_dev->dev->addr_len, ic_dev->dev->dev_addr,
- &ic_myaddr, &ic_netmask, &ic_gateway);
- pr_info(" host=%s, domain=%s, nis-domain=%s\n",
- utsname()->nodename, ic_domain, utsname()->domainname);
- pr_info(" bootserver=%pI4, rootserver=%pI4, rootpath=%s",
- &ic_servaddr, &root_server_addr, root_server_path);
- if (ic_dev_mtu)
- pr_cont(", mtu=%d", ic_dev_mtu);
-
- for (i = 0, count = 0; i < CONF_NAMESERVERS_MAX; i++) {
- if (ic_nameservers[i] != NONE) {
- if (i == 0)
- pr_info(" nameserver%u=%pI4",
- i, &ic_nameservers[i]);
- else
- pr_cont(", nameserver%u=%pI4",
- i, &ic_nameservers[i]);
- count++;
- }
- if ((i + 1 == CONF_NAMESERVERS_MAX) && count > 0)
- pr_cont("\n");
- }
-
- for (i = 0, count = 0; i < CONF_NTP_SERVERS_MAX; i++) {
- if (ic_ntp_servers[i] != NONE) {
- if (i == 0)
- pr_info(" ntpserver%u=%pI4",
- i, &ic_ntp_servers[i]);
- else
- pr_cont(", ntpserver%u=%pI4",
- i, &ic_ntp_servers[i]);
- count++;
- }
- if ((i + 1 == CONF_NTP_SERVERS_MAX) && count > 0)
- pr_cont("\n");
- }
- #endif
-
- if (ic_setup_if() < 0 || ic_setup_routes() < 0)
- err = -1;
- else
- err = 0;
- ic_close_devs();
- return err;
- }
- late_initcall(ip_auto_config);
- 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 (!strncmp(name, "dhcp", 4)) {
- char *client_id;
- ic_proto_enabled &= ~IC_RARP;
- client_id = strstr(name, "dhcp,");
- if (client_id) {
- char *v;
- client_id = client_id + 5;
- v = strchr(client_id, ',');
- if (!v)
- return 1;
- *v = 0;
- if (kstrtou8(client_id, 0, dhcp_client_identifier))
- pr_debug("DHCP: Invalid client identifier type\n");
- strncpy(dhcp_client_identifier + 1, v + 1, 251);
- *v = ',';
- }
- return 1;
- }
- #endif
- #ifdef CONFIG_IP_PNP_BOOTP
- else if (!strcmp(name, "bootp")) {
- ic_proto_enabled &= ~(IC_RARP | IC_USE_DHCP);
- return 1;
- }
- #endif
- #ifdef CONFIG_IP_PNP_RARP
- else if (!strcmp(name, "rarp")) {
- ic_proto_enabled &= ~(IC_BOOTP | IC_USE_DHCP);
- return 1;
- }
- #endif
- #ifdef IPCONFIG_DYNAMIC
- else if (!strcmp(name, "both")) {
- ic_proto_enabled &= ~IC_USE_DHCP;
- return 1;
- }
- #endif
- return 0;
- }
- static int __init ip_auto_config_setup(char *addrs)
- {
- char *cp, *ip, *dp;
- int num = 0;
- ic_set_manually = 1;
- ic_enable = 1;
-
- if (ic_proto_name(addrs))
- return 1;
-
- if (*addrs == 0 ||
- strcmp(addrs, "off") == 0 ||
- strcmp(addrs, "none") == 0) {
- ic_enable = 0;
- return 1;
- }
-
- ic_nameservers_predef();
- ic_ntp_servers_predef();
-
- ip = addrs;
- while (ip && *ip) {
- if ((cp = strchr(ip, ':')))
- *cp++ = '\0';
- if (strlen(ip) > 0) {
- pr_debug("IP-Config: Parameter #%d: `%s'\n", num, ip);
- switch (num) {
- case 0:
- if ((ic_myaddr = in_aton(ip)) == ANY)
- ic_myaddr = NONE;
- break;
- case 1:
- if ((ic_servaddr = in_aton(ip)) == ANY)
- ic_servaddr = NONE;
- break;
- case 2:
- if ((ic_gateway = in_aton(ip)) == ANY)
- ic_gateway = NONE;
- break;
- case 3:
- if ((ic_netmask = in_aton(ip)) == ANY)
- ic_netmask = NONE;
- break;
- case 4:
- if ((dp = strchr(ip, '.'))) {
- *dp++ = '\0';
- strscpy(utsname()->domainname, dp,
- sizeof(utsname()->domainname));
- }
- strscpy(utsname()->nodename, ip,
- sizeof(utsname()->nodename));
- ic_host_name_set = 1;
- break;
- case 5:
- strscpy(user_dev_name, ip, sizeof(user_dev_name));
- break;
- case 6:
- if (ic_proto_name(ip) == 0 &&
- ic_myaddr == NONE) {
- ic_enable = 0;
- }
- break;
- case 7:
- if (CONF_NAMESERVERS_MAX >= 1) {
- ic_nameservers[0] = in_aton(ip);
- if (ic_nameservers[0] == ANY)
- ic_nameservers[0] = NONE;
- }
- break;
- case 8:
- if (CONF_NAMESERVERS_MAX >= 2) {
- ic_nameservers[1] = in_aton(ip);
- if (ic_nameservers[1] == ANY)
- ic_nameservers[1] = NONE;
- }
- break;
- case 9:
- if (CONF_NTP_SERVERS_MAX >= 1) {
- ic_ntp_servers[0] = in_aton(ip);
- if (ic_ntp_servers[0] == ANY)
- ic_ntp_servers[0] = NONE;
- }
- break;
- }
- }
- ip = cp;
- num++;
- }
- return 1;
- }
- __setup("ip=", ip_auto_config_setup);
- static int __init nfsaddrs_config_setup(char *addrs)
- {
- return ip_auto_config_setup(addrs);
- }
- __setup("nfsaddrs=", nfsaddrs_config_setup);
- static int __init vendor_class_identifier_setup(char *addrs)
- {
- if (strscpy(vendor_class_identifier, addrs,
- sizeof(vendor_class_identifier))
- >= sizeof(vendor_class_identifier))
- pr_warn("DHCP: vendorclass too long, truncated to \"%s\"\n",
- vendor_class_identifier);
- return 1;
- }
- __setup("dhcpclass=", vendor_class_identifier_setup);
- static int __init set_carrier_timeout(char *str)
- {
- ssize_t ret;
- if (!str)
- return 0;
- ret = kstrtouint(str, 0, &carrier_timeout);
- if (ret)
- return 0;
- return 1;
- }
- __setup("carrier_timeout=", set_carrier_timeout);
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