diff options
Diffstat (limited to 'pfinet/linux-inet/devinet.c')
| -rw-r--r-- | pfinet/linux-inet/devinet.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/pfinet/linux-inet/devinet.c b/pfinet/linux-inet/devinet.c deleted file mode 100644 index 946536be..00000000 --- a/pfinet/linux-inet/devinet.c +++ /dev/null @@ -1,213 +0,0 @@ -/* - * NET3 IP device support routines. - * - * 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. - * - * Derived from the IP parts of dev.c 1.0.19 - * Authors: Ross Biro, <bir7@leland.Stanford.Edu> - * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> - * Mark Evans, <evansmp@uhura.aston.ac.uk> - * - * Additional Authors: - * Alan Cox, <gw4pts@gw4pts.ampr.org> - */ - -#include <asm/segment.h> -#include <asm/system.h> -#include <asm/bitops.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/socket.h> -#include <linux/sockios.h> -#include <linux/in.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/if_ether.h> -#include <linux/inet.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include "ip.h" -#include "route.h" -#include "protocol.h" -#include "tcp.h" -#include <linux/skbuff.h> -#include "sock.h" -#include "arp.h" - -/* - * Determine a default network mask, based on the IP address. - */ - -unsigned long ip_get_mask(unsigned long addr) -{ - unsigned long dst; - - if (addr == 0L) - return(0L); /* special case */ - - dst = ntohl(addr); - if (IN_CLASSA(dst)) - return(htonl(IN_CLASSA_NET)); - if (IN_CLASSB(dst)) - return(htonl(IN_CLASSB_NET)); - if (IN_CLASSC(dst)) - return(htonl(IN_CLASSC_NET)); - - /* - * Something else, probably a multicast. - */ - - return(0); -} - -/* - * Check the address for our address, broadcasts, etc. - * - * I intend to fix this to at the very least cache the last - * resolved entry. - */ - -int ip_chk_addr(unsigned long addr) -{ - struct device *dev; - unsigned long mask; - - /* - * Accept both `all ones' and `all zeros' as BROADCAST. - * (Support old BSD in other words). This old BSD - * support will go very soon as it messes other things - * up. - * Also accept `loopback broadcast' as BROADCAST. - */ - - if (addr == INADDR_ANY || addr == INADDR_BROADCAST || - addr == htonl(0x7FFFFFFFL)) - return IS_BROADCAST; - - mask = ip_get_mask(addr); - - /* - * Accept all of the `loopback' class A net. - */ - - if ((addr & mask) == htonl(0x7F000000L)) - return IS_MYADDR; - - /* - * OK, now check the interface addresses. - */ - - for (dev = dev_base; dev != NULL; dev = dev->next) - { - if (!(dev->flags & IFF_UP)) - continue; - /* - * If the protocol address of the device is 0 this is special - * and means we are address hunting (eg bootp). - */ - - if ((dev->pa_addr == 0)/* || (dev->flags&IFF_PROMISC)*/) - return IS_MYADDR; - /* - * Is it the exact IP address? - */ - - if (addr == dev->pa_addr) - return IS_MYADDR; - /* - * Is it our broadcast address? - */ - - if ((dev->flags & IFF_BROADCAST) && addr == dev->pa_brdaddr) - return IS_BROADCAST; - /* - * Nope. Check for a subnetwork broadcast. - */ - - if (((addr ^ dev->pa_addr) & dev->pa_mask) == 0) - { - if ((addr & ~dev->pa_mask) == 0) - return IS_BROADCAST; - if ((addr & ~dev->pa_mask) == ~dev->pa_mask) - return IS_BROADCAST; - } - - /* - * Nope. Check for Network broadcast. - */ - - if (((addr ^ dev->pa_addr) & mask) == 0) - { - if ((addr & ~mask) == 0) - return IS_BROADCAST; - if ((addr & ~mask) == ~mask) - return IS_BROADCAST; - } - } - if(IN_MULTICAST(ntohl(addr))) - return IS_MULTICAST; - return 0; /* no match at all */ -} - - -/* - * Retrieve our own address. - * - * Because the loopback address (127.0.0.1) is already recognized - * automatically, we can use the loopback interface's address as - * our "primary" interface. This is the address used by IP et - * al when it doesn't know which address to use (i.e. it does not - * yet know from or to which interface to go...). - */ - -unsigned long ip_my_addr(void) -{ - struct device *dev; - - for (dev = dev_base; dev != NULL; dev = dev->next) - { - if (dev->flags & IFF_LOOPBACK) - return(dev->pa_addr); - } - return(0); -} - -/* - * Find an interface that can handle addresses for a certain address. - * - * This needs optimising, since it's relatively trivial to collapse - * the two loops into one. - */ - -struct device * ip_dev_check(unsigned long addr) -{ - struct device *dev; - - for (dev = dev_base; dev; dev = dev->next) - { - if (!(dev->flags & IFF_UP)) - continue; - if (!(dev->flags & IFF_POINTOPOINT)) - continue; - if (addr != dev->pa_dstaddr) - continue; - return dev; - } - for (dev = dev_base; dev; dev = dev->next) - { - if (!(dev->flags & IFF_UP)) - continue; - if (dev->flags & IFF_POINTOPOINT) - continue; - if (dev->pa_mask & (addr ^ dev->pa_addr)) - continue; - return dev; - } - return NULL; -} |