diff options
Diffstat (limited to 'pfinet/linux-inet/raw.c')
| -rw-r--r-- | pfinet/linux-inet/raw.c | 319 |
1 files changed, 0 insertions, 319 deletions
diff --git a/pfinet/linux-inet/raw.c b/pfinet/linux-inet/raw.c deleted file mode 100644 index b7d34a37..00000000 --- a/pfinet/linux-inet/raw.c +++ /dev/null @@ -1,319 +0,0 @@ -/* - * 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. - * - * RAW - implementation of IP "raw" sockets. - * - * Version: @(#)raw.c 1.0.4 05/25/93 - * - * Authors: Ross Biro, <bir7@leland.Stanford.Edu> - * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> - * - * Fixes: - * Alan Cox : verify_area() fixed up - * Alan Cox : ICMP error handling - * Alan Cox : EMSGSIZE if you send too big a packet - * Alan Cox : Now uses generic datagrams and shared skbuff - * library. No more peek crashes, no more backlogs - * Alan Cox : Checks sk->broadcast. - * Alan Cox : Uses skb_free_datagram/skb_copy_datagram - * Alan Cox : Raw passes ip options too - * Alan Cox : Setsocketopt added - * Alan Cox : Fixed error return for broadcasts - * Alan Cox : Removed wake_up calls - * Alan Cox : Use ttl/tos - * Alan Cox : Cleaned up old debugging - * Alan Cox : Use new kernel side addresses - * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets. - * Alan Cox : BSD style RAW socket demultiplexing. - * - * 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 <asm/system.h> -#include <asm/segment.h> -#include <linux/types.h> -#include <linux/sched.h> -#include <linux/errno.h> -#include <linux/timer.h> -#include <linux/mm.h> -#include <linux/kernel.h> -#include <linux/fcntl.h> -#include <linux/socket.h> -#include <linux/in.h> -#include <linux/inet.h> -#include <linux/netdevice.h> -#include "ip.h" -#include "protocol.h" -#include <linux/skbuff.h> -#include "sock.h" -#include "icmp.h" -#include "udp.h" - - -static inline unsigned long min(unsigned long a, unsigned long b) -{ - if (a < b) - return(a); - return(b); -} - - -/* raw_err gets called by the icmp module. */ -void raw_err (int err, unsigned char *header, unsigned long daddr, - unsigned long saddr, struct inet_protocol *protocol) -{ - struct sock *sk; - - if (protocol == NULL) - return; - sk = (struct sock *) protocol->data; - if (sk == NULL) - return; - - /* This is meaningless in raw sockets. */ - if (err & 0xff00 == (ICMP_SOURCE_QUENCH << 8)) - { - if (sk->cong_window > 1) sk->cong_window = sk->cong_window/2; - return; - } - - sk->err = icmp_err_convert[err & 0xff].error; - sk->error_report(sk); - - return; -} - - -/* - * This should be the easiest of all, all we do is - * copy it into a buffer. All demultiplexing is done - * in ip.c - */ - -int raw_rcv(struct sock *sk, struct sk_buff *skb, struct device *dev, long saddr, long daddr) -{ - /* Now we need to copy this into memory. */ - skb->sk = sk; - skb->len = ntohs(skb->ip_hdr->tot_len); - skb->h.raw = (unsigned char *) skb->ip_hdr; - skb->dev = dev; - skb->saddr = daddr; - skb->daddr = saddr; - - /* Charge it to the socket. */ - - if(sock_queue_rcv_skb(sk,skb)<0) - { - ip_statistics.IpInDiscards++; - skb->sk=NULL; - kfree_skb(skb, FREE_READ); - return(0); - } - - ip_statistics.IpInDelivers++; - release_sock(sk); - return(0); -} - -/* - * Send a RAW IP packet. - */ - -static int raw_sendto(struct sock *sk, unsigned char *from, - int len, int noblock, unsigned flags, struct sockaddr_in *usin, int addr_len) -{ - struct sk_buff *skb; - struct device *dev=NULL; - struct sockaddr_in sin; - int tmp; - int err; - - /* - * Check the flags. Only MSG_DONTROUTE is permitted. - */ - - if (flags & MSG_OOB) /* Mirror BSD error message compatibility */ - return -EOPNOTSUPP; - - if (flags & ~MSG_DONTROUTE) - return(-EINVAL); - /* - * Get and verify the address. - */ - - if (usin) - { - if (addr_len < sizeof(sin)) - return(-EINVAL); - memcpy(&sin, usin, sizeof(sin)); - if (sin.sin_family && sin.sin_family != AF_INET) - return(-EINVAL); - } - else - { - if (sk->state != TCP_ESTABLISHED) - return(-EINVAL); - sin.sin_family = AF_INET; - sin.sin_port = sk->protocol; - sin.sin_addr.s_addr = sk->daddr; - } - if (sin.sin_port == 0) - sin.sin_port = sk->protocol; - - if (sin.sin_addr.s_addr == INADDR_ANY) - sin.sin_addr.s_addr = ip_my_addr(); - - if (sk->broadcast == 0 && ip_chk_addr(sin.sin_addr.s_addr)==IS_BROADCAST) - return -EACCES; - - skb=sock_alloc_send_skb(sk, len+sk->prot->max_header, noblock, &err); - if(skb==NULL) - return err; - - skb->sk = sk; - skb->free = 1; - skb->localroute = sk->localroute | (flags&MSG_DONTROUTE); - - tmp = sk->prot->build_header(skb, sk->saddr, - sin.sin_addr.s_addr, &dev, - sk->protocol, sk->opt, skb->mem_len, sk->ip_tos,sk->ip_ttl); - if (tmp < 0) - { - kfree_skb(skb,FREE_WRITE); - release_sock(sk); - return(tmp); - } - - memcpy_fromfs(skb->data + tmp, from, len); - - /* - * If we are using IPPROTO_RAW, we need to fill in the source address in - * the IP header - */ - - if(sk->protocol==IPPROTO_RAW) - { - unsigned char *buff; - struct iphdr *iph; - - buff = skb->data; - buff += tmp; - - iph = (struct iphdr *)buff; - iph->saddr = sk->saddr; - } - - skb->len = tmp + len; - - sk->prot->queue_xmit(sk, dev, skb, 1); - release_sock(sk); - return(len); -} - - -static int raw_write(struct sock *sk, unsigned char *buff, int len, int noblock, - unsigned flags) -{ - return(raw_sendto(sk, buff, len, noblock, flags, NULL, 0)); -} - - -static void raw_close(struct sock *sk, int timeout) -{ - sk->state = TCP_CLOSE; -} - - -static int raw_init(struct sock *sk) -{ - return(0); -} - - -/* - * This should be easy, if there is something there - * we return it, otherwise we block. - */ - -int raw_recvfrom(struct sock *sk, unsigned char *to, int len, - int noblock, unsigned flags, struct sockaddr_in *sin, - int *addr_len) -{ - int copied=0; - struct sk_buff *skb; - int err; - int truesize; - - if (flags & MSG_OOB) - return -EOPNOTSUPP; - - if (sk->shutdown & RCV_SHUTDOWN) - return(0); - - if (addr_len) - *addr_len=sizeof(*sin); - - skb=skb_recv_datagram(sk,flags,noblock,&err); - if(skb==NULL) - return err; - - truesize=skb->len; - copied = min(len, truesize); - - skb_copy_datagram(skb, 0, to, copied); - sk->stamp=skb->stamp; - - /* Copy the address. */ - if (sin) - { - sin->sin_family = AF_INET; - sin->sin_addr.s_addr = skb->daddr; - } - skb_free_datagram(skb); - release_sock(sk); - return (truesize); /* len not copied. BSD returns the true size of the message so you know a bit fell off! */ -} - - -int raw_read (struct sock *sk, unsigned char *buff, int len, int noblock,unsigned flags) -{ - return(raw_recvfrom(sk, buff, len, noblock, flags, NULL, NULL)); -} - - -struct proto raw_prot = { - sock_wmalloc, - sock_rmalloc, - sock_wfree, - sock_rfree, - sock_rspace, - sock_wspace, - raw_close, - raw_read, - raw_write, - raw_sendto, - raw_recvfrom, - ip_build_header, - udp_connect, - NULL, - ip_queue_xmit, - NULL, - NULL, - NULL, - NULL, - datagram_select, - NULL, - raw_init, - NULL, - ip_setsockopt, - ip_getsockopt, - 128, - 0, - {NULL,}, - "RAW", - 0, 0 -}; |