/* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * AF_INET protocol family socket handler. * * Version: @(#)af_inet.c (from sock.c) 1.0.17 06/02/93 * * Authors: Ross Biro, * Fred N. van Kempen, * Florian La Roche, * Alan Cox, * * Changes (see also sock.c) * * A.N.Kuznetsov : Socket death error in accept(). * John Richardson : Fix non blocking error in connect() * so sockets that fail to connect * don't return -EINPROGRESS. * Alan Cox : Asynchronous I/O support * Alan Cox : Keep correct socket pointer on sock structures * when accept() ed * Alan Cox : Semantics of SO_LINGER aren't state moved * to close when you look carefully. With * this fixed and the accept bug fixed * some RPC stuff seems happier. * Niibe Yutaka : 4.4BSD style write async I/O * Alan Cox, * Tony Gale : Fixed reuse semantics. * Alan Cox : bind() shouldn't abort existing but dead * sockets. Stops FTP netin:.. I hope. * Alan Cox : bind() works correctly for RAW sockets. Note * that FreeBSD at least was broken in this respect * so be careful with compatibility tests... * Alan Cox : routing cache support * Alan Cox : memzero the socket structure for compactness. * Matt Day : nonblock connect error handler * Alan Cox : Allow large numbers of pending sockets * (eg for big web sites), but only if * specifically application requested. * Alan Cox : New buffering throughout IP. Used dumbly. * Alan Cox : New buffering now used smartly. * Alan Cox : BSD rather than common sense interpretation of * listen. * Germano Caronni : Assorted small races. * Alan Cox : sendmsg/recvmsg basic support. * Alan Cox : Only sendmsg/recvmsg now supported. * Alan Cox : Locked down bind (see security list). * Alan Cox : Loosened bind a little. * Mike McLagan : ADD/DEL DLCI Ioctls * Willy Konynenberg : Transparent proxying support. * David S. Miller : New socket lookup architecture. * Some other random speedups. * * 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 of the License, or (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_IP_MASQUERADE #include #endif #ifdef CONFIG_IP_ALIAS #include #endif #ifdef CONFIG_BRIDGE #include #endif #ifdef CONFIG_KERNELD #include #endif #ifdef CONFIG_NET_RADIO #include #endif /* CONFIG_NET_RADIO */ #define min(a,b) ((a)<(b)?(a):(b)) extern int sysctl_core_destroy_delay; extern struct proto packet_prot; extern int raw_get_info(char *, char **, off_t, int, int); extern int snmp_get_info(char *, char **, off_t, int, int); extern int afinet_get_info(char *, char **, off_t, int, int); extern int tcp_get_info(char *, char **, off_t, int, int); extern int udp_get_info(char *, char **, off_t, int, int); #ifdef CONFIG_DLCI extern int dlci_ioctl(unsigned int, void*); #endif #ifdef CONFIG_DLCI_MODULE int (*dlci_ioctl_hook)(unsigned int, void *) = NULL; #endif int (*rarp_ioctl_hook)(unsigned int,void*) = NULL; /* * Destroy an AF_INET socket */ static __inline__ void kill_sk_queues(struct sock *sk) { struct sk_buff *skb; /* First the read buffer. */ while((skb = skb_dequeue(&sk->receive_queue)) != NULL) { /* This will take care of closing sockets that were * listening and didn't accept everything. */ if (skb->sk != NULL && skb->sk != sk) skb->sk->prot->close(skb->sk, 0); kfree_skb(skb, FREE_READ); } /* Next, the error queue. */ while((skb = skb_dequeue(&sk->error_queue)) != NULL) kfree_skb(skb, FREE_READ); /* Now the backlog. */ while((skb=skb_dequeue(&sk->back_log)) != NULL) kfree_skb(skb, FREE_READ); } static __inline__ void kill_sk_now(struct sock *sk) { /* No longer exists. */ del_from_prot_sklist(sk); /* This is gross, but needed for SOCK_PACKET -DaveM */ if(sk->prot->unhash) sk->prot->unhash(sk); if(sk->opt) kfree(sk->opt); dst_release(sk->dst_cache); sk_free(sk); } static __inline__ void kill_sk_later(struct sock *sk) { /* this should never happen. */ /* actually it can if an ack has just been sent. */ /* * It's more normal than that... * It can happen because a skb is still in the device queues * [PR] */ printk(KERN_DEBUG "Socket destroy delayed (r=%d w=%d)\n", atomic_read(&sk->rmem_alloc), atomic_read(&sk->wmem_alloc)); sk->destroy = 1; sk->ack_backlog = 0; release_sock(sk); net_reset_timer(sk, TIME_DESTROY, sysctl_core_destroy_delay); } void destroy_sock(struct sock *sk) { lock_sock(sk); /* just to be safe. */ /* Now we can no longer get new packets or once the * timers are killed, send them. */ net_delete_timer(sk); if (sk->prot->destroy) sk->prot->destroy(sk); kill_sk_queues(sk); /* Now if it has a half accepted/ closed socket. */ if (sk->pair) { sk->pair->prot->close(sk->pair, 0); sk->pair = NULL; } /* Now if everything is gone we can free the socket * structure, otherwise we need to keep it around until * everything is gone. */ if (atomic_read(&sk->rmem_alloc) == 0 && atomic_read(&sk->wmem_alloc) == 0) kill_sk_now(sk); else kill_sk_later(sk); } /* * The routines beyond this point handle the behaviour of an AF_INET * socket object. Mostly it punts to the subprotocols of IP to do * the work. */ /* * Set socket options on an inet socket. */ int inet_setsockopt(struct socket *sock, int level, int optname, char *optval, int optlen) { struct sock *sk=sock->sk; if (sk->prot->setsockopt==NULL) return(-EOPNOTSUPP); return sk->prot->setsockopt(sk,level,optname,optval,optlen); } /* * Get a socket option on an AF_INET socket. * * FIX: POSIX 1003.1g is very ambiguous here. It states that * asynchronous errors should be reported by getsockopt. We assume * this means if you specify SO_ERROR (otherwise whats the point of it). */ int inet_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen) { struct sock *sk=sock->sk; if (sk->prot->getsockopt==NULL) return(-EOPNOTSUPP); return sk->prot->getsockopt(sk,level,optname,optval,optlen); } /* * Automatically bind an unbound socket. */ static int inet_autobind(struct sock *sk) { /* We may need to bind the socket. */ if (sk->num == 0) { sk->num = sk->prot->good_socknum(); if (sk->num == 0) return(-EAGAIN); sk->dummy_th.source = htons(sk->num); sk->prot->hash(sk); add_to_prot_sklist(sk); } return 0; } /* * Move a socket into listening state. */ int inet_listen(struct socket *sock, int backlog) { struct sock *sk = sock->sk; if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) return(-EINVAL); if (inet_autobind(sk) != 0) return -EAGAIN; /* We might as well re use these. */ /* * note that the backlog is "unsigned char", so truncate it * somewhere. We might as well truncate it to what everybody * else does.. * Now truncate to 128 not 5. */ if ((unsigned) backlog == 0) /* BSDism */ backlog = 1; if ((unsigned) backlog > SOMAXCONN) backlog = SOMAXCONN; sk->max_ack_backlog = backlog; if (sk->state != TCP_LISTEN) { sk->ack_backlog = 0; sk->state = TCP_LISTEN; sk->prot->rehash(sk); add_to_prot_sklist(sk); } sk->socket->flags |= SO_ACCEPTCON; return(0); } /* * Create an inet socket. * * FIXME: Gcc would generate much better code if we set the parameters * up in in-memory structure order. Gcc68K even more so */ static int inet_create(struct socket *sock, int protocol) { struct sock *sk; struct proto *prot; sock->state = SS_UNCONNECTED; sk = sk_alloc(GFP_KERNEL); if (sk == NULL) goto do_oom; /* Note for tcp that also wiped the dummy_th block for us. */ if(sock->type == SOCK_STREAM || sock->type == SOCK_SEQPACKET) { if (protocol && protocol != IPPROTO_TCP) goto free_and_noproto; protocol = IPPROTO_TCP; sk->no_check = TCP_NO_CHECK; if (ipv4_config.no_pmtu_disc) sk->ip_pmtudisc = IP_PMTUDISC_DONT; else sk->ip_pmtudisc = IP_PMTUDISC_WANT; prot = &tcp_prot; sock->ops = &inet_stream_ops; } else if(sock->type == SOCK_DGRAM) { if (protocol && protocol != IPPROTO_UDP) goto free_and_noproto; protocol = IPPROTO_UDP; sk->no_check = UDP_NO_CHECK; sk->ip_pmtudisc = IP_PMTUDISC_DONT; prot=&udp_prot; sock->ops = &inet_dgram_ops; } else if(sock->type == SOCK_RAW || sock->type == SOCK_PACKET) { if (!suser()) goto free_and_badperm; if (!protocol) goto free_and_noproto; prot = (sock->type == SOCK_RAW) ? &raw_prot : &packet_prot; sk->reuse = 1; sk->ip_pmtudisc = IP_PMTUDISC_DONT; sk->num = protocol; sock->ops = &inet_dgram_ops; } else { goto free_and_badtype; } sock_init_data(sock,sk); sk->destruct = NULL; sk->zapped=0; #ifdef CONFIG_TCP_NAGLE_OFF sk->nonagle = 1; #endif sk->family = AF_INET; sk->protocol = protocol; sk->prot = prot; sk->backlog_rcv = prot->backlog_rcv; sk->timer.data = (unsigned long)sk; sk->timer.function = &net_timer; sk->ip_ttl=ip_statistics.IpDefaultTTL; if(sk->type==SOCK_RAW && protocol==IPPROTO_RAW) sk->ip_hdrincl=1; else sk->ip_hdrincl=0; sk->ip_mc_loop=1; sk->ip_mc_ttl=1; sk->ip_mc_index=0; sk->ip_mc_list=NULL; /* Speed up by setting some standard state for the dummy_th * if TCP uses it (maybe move to tcp_init later) */ if (sk->num) { /* It assumes that any protocol which allows * the user to assign a number at socket * creation time automatically * shares. */ sk->dummy_th.source = ntohs(sk->num); /* This is gross, but needed for SOCK_PACKET -DaveM */ if(sk->prot->hash) sk->prot->hash(sk); add_to_prot_sklist(sk); } if (sk->prot->init) { int err = sk->prot->init(sk); if (err != 0) { destroy_sock(sk); return(err); } } return(0); free_and_badtype: sk_free(sk); return -ESOCKTNOSUPPORT; free_and_badperm: sk_free(sk); return -EPERM; free_and_noproto: sk_free(sk); return -EPROTONOSUPPORT; do_oom: return -ENOBUFS; } /* * Duplicate a socket. */ static int inet_dup(struct socket *newsock, struct socket *oldsock) { return inet_create(newsock, oldsock->sk->protocol); } /* * The peer socket should always be NULL (or else). When we call this * function we are destroying the object and from then on nobody * should refer to it. */ int inet_release(struct socket *sock, struct socket *peersock) { struct sock *sk = sock->sk; if (sk) { unsigned long timeout; /* Begin closedown and wake up sleepers. */ if (sock->state != SS_UNCONNECTED) sock->state = SS_DISCONNECTING; sk->state_change(sk); /* Applications forget to leave groups before exiting */ ip_mc_drop_socket(sk); /* If linger is set, we don't return until the close * is complete. Otherwise we return immediately. The * actually closing is done the same either way. * * If the close is due to the process exiting, we never * linger.. */ timeout = 0; if (sk->linger && !(current->flags & PF_EXITING)) { timeout = ~0UL; /* XXX This makes no sense whatsoever... -DaveM */ if (!sk->lingertime) timeout = jiffies + HZ*sk->lingertime; } sock->sk = NULL; sk->socket = NULL; sk->prot->close(sk, timeout); } return(0); } static int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) { struct sockaddr_in *addr=(struct sockaddr_in *)uaddr; struct sock *sk=sock->sk; unsigned short snum; int chk_addr_ret; /* If the socket has its own bind function then use it. (RAW and PACKET) */ if(sk->prot->bind) return sk->prot->bind(sk, uaddr, addr_len); /* Check these errors (active socket, bad address length, double bind). */ if ((sk->state != TCP_CLOSE) || (addr_len < sizeof(struct sockaddr_in)) || (sk->num != 0)) return -EINVAL; snum = ntohs(addr->sin_port); #ifdef CONFIG_IP_MASQUERADE /* The kernel masquerader needs some ports. */ if((snum >= PORT_MASQ_BEGIN) && (snum <= PORT_MASQ_END)) return -EADDRINUSE; #endif if (snum == 0) snum = sk->prot->good_socknum(); if (snum < PROT_SOCK && !suser()) return(-EACCES); chk_addr_ret = __ip_chk_addr(addr->sin_addr.s_addr); if (addr->sin_addr.s_addr != 0 && chk_addr_ret != IS_MYADDR && chk_addr_ret != IS_MULTICAST && chk_addr_ret != IS_BROADCAST) { #ifdef CONFIG_IP_TRANSPARENT_PROXY /* Superuser may bind to any address to allow transparent proxying. */ if(!suser()) #endif return -EADDRNOTAVAIL; /* Source address MUST be ours! */ } /* We keep a pair of addresses. rcv_saddr is the one * used by hash lookups, and saddr is used for transmit. * * In the BSD API these are the same except where it * would be illegal to use them (multicast/broadcast) in * which case the sending device address is used. */ sk->rcv_saddr = sk->saddr = addr->sin_addr.s_addr; if(chk_addr_ret == IS_MULTICAST || chk_addr_ret == IS_BROADCAST) sk->saddr = 0; /* Use device */ /* Make sure we are allowed to bind here. */ if(sk->prot->verify_bind(sk, snum)) return -EADDRINUSE; sk->num = snum; sk->dummy_th.source = ntohs(snum); sk->daddr = 0; sk->dummy_th.dest = 0; sk->prot->rehash(sk); add_to_prot_sklist(sk); dst_release(sk->dst_cache); sk->dst_cache=NULL; return(0); } int inet_dgram_connect(struct socket *sock, struct sockaddr * uaddr, int addr_len, int flags) { struct sock *sk=sock->sk; int err; if (inet_autobind(sk) != 0) return(-EAGAIN); if (sk->prot->connect == NULL) return(-EOPNOTSUPP); err = sk->prot->connect(sk, (struct sockaddr *)uaddr, addr_len); if (err < 0) return(err); return(0); } /* * Connect to a remote host. There is regrettably still a little * TCP 'magic' in here. */ int inet_stream_connect(struct socket *sock, struct sockaddr * uaddr, int addr_len, int flags) { struct sock *sk=sock->sk; int err; if(sock->state != SS_UNCONNECTED && sock->state != SS_CONNECTING) { if(sock->state == SS_CONNECTED) return -EISCONN; return -EINVAL; } if(sock->state == SS_CONNECTING) { if(tcp_connected(sk->state)) { sock->state = SS_CONNECTED; return 0; } if(sk->protocol == IPPROTO_TCP && (flags & O_NONBLOCK)) { if(sk->err) return sock_error(sk); return -EALREADY; } } else { /* We may need to bind the socket. */ if (inet_autobind(sk) != 0) return(-EAGAIN); if (sk->prot->connect == NULL) return(-EOPNOTSUPP); err = sk->prot->connect(sk, uaddr, addr_len); if (err < 0) return(err); sock->state = SS_CONNECTING; } if (sk->state > TCP_FIN_WAIT2 && sock->state == SS_CONNECTING) { sock->state = SS_UNCONNECTED; return sock_error(sk); } if (sk->state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) return (-EINPROGRESS); cli(); while(sk->state == TCP_SYN_SENT || sk->state == TCP_SYN_RECV) { interruptible_sleep_on(sk->sleep); if (current->signal & ~current->blocked) { sti(); return(-ERESTARTSYS); } /* This fixes a nasty in the tcp/ip code. There is a hideous hassle with icmp error packets wanting to close a tcp or udp socket. */ if (sk->err && sk->protocol == IPPROTO_TCP) { sock->state = SS_UNCONNECTED; sti(); return sock_error(sk); /* set by tcp_err() */ } } sti(); sock->state = SS_CONNECTED; if ((sk->state != TCP_ESTABLISHED) && sk->err) { sock->state = SS_UNCONNECTED; return sock_error(sk); } return(0); } /* * Accept a pending connection. The TCP layer now gives BSD semantics. */ int inet_accept(struct socket *sock, struct socket *newsock, int flags) { struct sock *sk1 = sock->sk, *sk2; struct sock *newsk = newsock->sk; int err = -EINVAL; if (sock->state != SS_UNCONNECTED || !(sock->flags & SO_ACCEPTCON)) goto do_err; err = -EOPNOTSUPP; if (sk1->prot->accept == NULL) goto do_err; /* Restore the state if we have been interrupted, and then returned. */ if (sk1->pair != NULL) { sk2 = sk1->pair; sk1->pair = NULL; } else { if((sk2 = sk1->prot->accept(sk1,flags)) == NULL) goto do_sk1_err; } /* * We've been passed an extra socket. * We need to free it up because the tcp module creates * its own when it accepts one. */ sk2->sleep = newsk->sleep; newsock->sk = sk2; sk2->socket = newsock; newsk->socket = NULL; if (flags & O_NONBLOCK) goto do_half_success; cli(); while (sk2->state == TCP_SYN_RECV) { interruptible_sleep_on(sk2->sleep); if (current->signal & ~current->blocked) goto do_interrupted; } sti(); if(sk2->state == TCP_ESTABLISHED) goto do_full_success; if(sk2->err > 0) goto do_connect_err; err = -ECONNABORTED; if (sk2->state == TCP_CLOSE) goto do_bad_connection; do_full_success: destroy_sock(newsk); newsock->state = SS_CONNECTED; return 0; do_half_success: destroy_sock(newsk); return(0); do_connect_err: err = sock_error(sk2); do_bad_connection: sk2->sleep = NULL; sk2->socket = NULL; destroy_sock(sk2); newsock->sk = newsk; newsk->socket = newsock; return err; do_interrupted: sti(); sk1->pair = sk2; sk2->sleep = NULL; sk2->socket = NULL; newsock->sk = newsk; newsk->socket = newsock; err = -ERESTARTSYS; do_err: return err; do_sk1_err: err = sock_error(sk1); return err; } /* * This does both peername and sockname. */ static int inet_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len, int peer) { struct sock *sk = sock->sk; struct sockaddr_in *sin = (struct sockaddr_in *)uaddr; sin->sin_family = AF_INET; if (peer) { if (!tcp_connected(sk->state)) return(-ENOTCONN); sin->sin_port = sk->dummy_th.dest; sin->sin_addr.s_addr = sk->daddr; } else { __u32 addr = sk->rcv_saddr; if (!addr) addr = sk->saddr; sin->sin_port = sk->dummy_th.source; sin->sin_addr.s_addr = addr; } *uaddr_len = sizeof(*sin); return(0); } int inet_recvmsg(struct socket *sock, struct msghdr *msg, int size, int flags, struct scm_cookie *scm) { struct sock *sk = sock->sk; int addr_len = 0; int err; if (sock->flags & SO_ACCEPTCON) return(-EINVAL); if (sk->prot->recvmsg == NULL) return(-EOPNOTSUPP); if (sk->err) return sock_error(sk); /* We may need to bind the socket. */ if (inet_autobind(sk) != 0) return(-EAGAIN); err = sk->prot->recvmsg(sk, msg, size, flags&MSG_DONTWAIT, flags&~MSG_DONTWAIT, &addr_len); if (err >= 0) msg->msg_namelen = addr_len; return err; } int inet_sendmsg(struct socket *sock, struct msghdr *msg, int size, struct scm_cookie *scm) { struct sock *sk = sock->sk; if (sk->shutdown & SEND_SHUTDOWN) { send_sig(SIGPIPE, current, 1); return(-EPIPE); } if (sk->prot->sendmsg == NULL) return(-EOPNOTSUPP); if(sk->err) return sock_error(sk); /* We may need to bind the socket. */ if(inet_autobind(sk) != 0) return -EAGAIN; return sk->prot->sendmsg(sk, msg, size); } int inet_shutdown(struct socket *sock, int how) { struct sock *sk = sock->sk; /* This should really check to make sure * the socket is a TCP socket. (WHY AC...) */ how++; /* maps 0->1 has the advantage of making bit 1 rcvs and 1->2 bit 2 snds. 2->3 */ if ((how & ~SHUTDOWN_MASK) || how==0) /* MAXINT->0 */ return(-EINVAL); if (sock->state == SS_CONNECTING && sk->state == TCP_ESTABLISHED) sock->state = SS_CONNECTED; if (!sk || !tcp_connected(sk->state)) return(-ENOTCONN); sk->shutdown |= how; if (sk->prot->shutdown) sk->prot->shutdown(sk, how); return(0); } unsigned int inet_poll(struct socket *sock, poll_table *wait) { struct sock *sk = sock->sk; if (sk->prot->poll == NULL) return(0); return sk->prot->poll(sock, wait); } /* * ioctl() calls you can issue on an INET socket. Most of these are * device configuration and stuff and very rarely used. Some ioctls * pass on to the socket itself. * * NOTE: I like the idea of a module for the config stuff. ie ifconfig * loads the devconfigure module does its configuring and unloads it. * There's a good 20K of config code hanging around the kernel. */ static int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { struct sock *sk = sock->sk; int err; int pid; switch(cmd) { case FIOSETOWN: case SIOCSPGRP: err = get_user(pid, (int *) arg); if (err) return err; if (current->pid != pid && current->pgrp != -pid && !suser()) return -EPERM; sk->proc = pid; return(0); case FIOGETOWN: case SIOCGPGRP: return put_user(sk->proc, (int *)arg); return(0); case SIOCGSTAMP: if(sk->stamp.tv_sec==0) return -ENOENT; err = copy_to_user((void *)arg,&sk->stamp,sizeof(struct timeval)); if (err) err = -EFAULT; return err; case SIOCADDRT: case SIOCDELRT: case SIOCRTMSG: return(ip_rt_ioctl(cmd,(void *) arg)); case SIOCDARP: case SIOCGARP: case SIOCSARP: case OLD_SIOCDARP: case OLD_SIOCGARP: case OLD_SIOCSARP: return(arp_ioctl(cmd,(void *) arg)); case SIOCDRARP: case SIOCGRARP: case SIOCSRARP: #ifdef CONFIG_KERNELD if (rarp_ioctl_hook == NULL) request_module("rarp"); #endif if (rarp_ioctl_hook != NULL) return(rarp_ioctl_hook(cmd,(void *) arg)); case SIOCGIFADDR: case SIOCSIFADDR: case SIOCGIFBRDADDR: case SIOCSIFBRDADDR: case SIOCGIFNETMASK: case SIOCSIFNETMASK: case SIOCGIFDSTADDR: case SIOCSIFDSTADDR: return(devinet_ioctl(cmd,(void *) arg)); case SIOCGIFCONF: case SIOCGIFFLAGS: case SIOCSIFFLAGS: case SIOCADDMULTI: case SIOCDELMULTI: case SIOCGIFMETRIC: case SIOCSIFMETRIC: case SIOCGIFMEM: case SIOCSIFMEM: case SIOCGIFMTU: case SIOCSIFMTU: case SIOCSIFLINK: case SIOCGIFHWADDR: case SIOCSIFHWADDR: case SIOCSIFMAP: case SIOCGIFMAP: case SIOCSIFSLAVE: case SIOCGIFSLAVE: case SIOGIFINDEX: return(dev_ioctl(cmd,(void *) arg)); case SIOCGIFBR: case SIOCSIFBR: #ifdef CONFIG_BRIDGE return(br_ioctl(cmd,(void *) arg)); #else return -ENOPKG; #endif case SIOCADDDLCI: case SIOCDELDLCI: #ifdef CONFIG_DLCI return(dlci_ioctl(cmd, (void *) arg)); #endif #ifdef CONFIG_DLCI_MODULE #ifdef CONFIG_KERNELD if (dlci_ioctl_hook == NULL) request_module("dlci"); #endif if (dlci_ioctl_hook) return((*dlci_ioctl_hook)(cmd, (void *) arg)); #endif return -ENOPKG; default: if ((cmd >= SIOCDEVPRIVATE) && (cmd <= (SIOCDEVPRIVATE + 15))) return(dev_ioctl(cmd,(void *) arg)); #ifdef CONFIG_NET_RADIO if((cmd >= SIOCIWFIRST) && (cmd <= SIOCIWLAST)) return(dev_ioctl(cmd,(void *) arg)); #endif if (sk->prot->ioctl==NULL) return(-EINVAL); return(sk->prot->ioctl(sk, cmd, arg)); } /*NOTREACHED*/ return(0); } struct proto_ops inet_stream_ops = { AF_INET, inet_dup, inet_release, inet_bind, inet_stream_connect, NULL, inet_accept, inet_getname, inet_poll, inet_ioctl, inet_listen, inet_shutdown, inet_setsockopt, inet_getsockopt, sock_no_fcntl, inet_sendmsg, inet_recvmsg }; struct proto_ops inet_dgram_ops = { AF_INET, inet_dup, inet_release, inet_bind, inet_dgram_connect, NULL, NULL, inet_getname, datagram_poll, inet_ioctl, sock_no_listen, inet_shutdown, inet_setsockopt, inet_getsockopt, sock_no_fcntl, inet_sendmsg, inet_recvmsg }; struct net_proto_family inet_family_ops = { AF_INET, inet_create }; extern unsigned long seq_offset; #ifdef CONFIG_PROC_FS #ifdef CONFIG_INET_RARP static struct proc_dir_entry proc_net_rarp = { PROC_NET_RARP, 4, "rarp", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_net_inode_operations, rarp_get_info }; #endif /* RARP */ static struct proc_dir_entry proc_net_raw = { PROC_NET_RAW, 3, "raw", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_net_inode_operations, raw_get_info }; static struct proc_dir_entry proc_net_snmp = { PROC_NET_SNMP, 4, "snmp", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_net_inode_operations, snmp_get_info }; static struct proc_dir_entry proc_net_sockstat = { PROC_NET_SOCKSTAT, 8, "sockstat", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_net_inode_operations, afinet_get_info }; static struct proc_dir_entry proc_net_tcp = { PROC_NET_TCP, 3, "tcp", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_net_inode_operations, tcp_get_info }; static struct proc_dir_entry proc_net_udp = { PROC_NET_UDP, 3, "udp", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_net_inode_operations, udp_get_info }; #endif /* CONFIG_PROC_FS */ extern void tcp_init(void); /* * Called by socket.c on kernel startup. */ __initfunc(void inet_proto_init(struct net_proto *pro)) { struct sk_buff *dummy_skb; struct inet_protocol *p; printk(KERN_INFO "Swansea University Computer Society TCP/IP for NET3.037\n"); if (sizeof(struct inet_skb_parm) > sizeof(dummy_skb->cb)) { printk(KERN_CRIT "inet_proto_init: panic\n"); return; } /* * Tell SOCKET that we are alive... */ (void) sock_register(&inet_family_ops); seq_offset = CURRENT_TIME*250; /* * Add all the protocols. */ printk(KERN_INFO "IP Protocols: "); for(p = inet_protocol_base; p != NULL;) { struct inet_protocol *tmp = (struct inet_protocol *) p->next; inet_add_protocol(p); printk("%s%s",p->name,tmp?", ":"\n"); p = tmp; } /* * Set the ARP module up */ arp_init(); /* * Set the IP module up */ ip_init(); /* Setup TCP slab cache for open requests. */ tcp_init(); /* * Set the ICMP layer up */ icmp_init(&inet_family_ops); /* * Set the firewalling up */ #if defined(CONFIG_IP_ACCT)||defined(CONFIG_IP_FIREWALL) ip_fw_init(); #endif #ifdef CONFIG_IP_MASQUERADE ip_masq_init(); #endif /* * Initialise the multicast router */ #if defined(CONFIG_IP_MROUTE) ip_mr_init(); #endif /* * Initialise AF_INET alias type (register net_alias_type) */ #if defined(CONFIG_IP_ALIAS) ip_alias_init(); #endif #ifdef CONFIG_INET_RARP rarp_ioctl_hook = rarp_ioctl; #endif /* * Create all the /proc entries. */ #ifdef CONFIG_PROC_FS #ifdef CONFIG_INET_RARP proc_net_register(&proc_net_rarp); #endif /* RARP */ proc_net_register(&proc_net_raw); proc_net_register(&proc_net_snmp); proc_net_register(&proc_net_sockstat); proc_net_register(&proc_net_tcp); proc_net_register(&proc_net_udp); #endif /* CONFIG_PROC_FS */ }