diff options
Diffstat (limited to 'sys/netinet/in_hostcache.c')
| -rw-r--r-- | sys/netinet/in_hostcache.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/sys/netinet/in_hostcache.c b/sys/netinet/in_hostcache.c deleted file mode 100644 index 36a92fd..0000000 --- a/sys/netinet/in_hostcache.c +++ /dev/null @@ -1,157 +0,0 @@ -/* - * Copyright 1997 Massachusetts Institute of Technology - * - * Permission to use, copy, modify, and distribute this software and - * its documentation for any purpose and without fee is hereby - * granted, provided that both the above copyright notice and this - * permission notice appear in all copies, that both the above - * copyright notice and this permission notice appear in all - * supporting documentation, and that the name of M.I.T. not be used - * in advertising or publicity pertaining to distribution of the - * software without specific, written prior permission. M.I.T. makes - * no representations about the suitability of this software for any - * purpose. It is provided "as is" without express or implied - * warranty. - * - * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS - * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, - * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT - * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD$ - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/malloc.h> -#include <sys/socket.h> -#include <sys/socketvar.h> - -#include <net/hostcache.h> -#include <net/if.h> -#include <net/if_var.h> -#include <net/route.h> - -#include <netinet/in.h> -#include <netinet/in_hostcache.h> -#include <netinet/tcp.h> -#include <netinet/tcp_timer.h> -#include <netinet/tcp_var.h> - -/* - * Manage the IP per-host cache (really a thin veneer over the generic - * per-host cache code). - */ - -/* Look up an entry -- can be called from interrupt context. */ -struct in_hcentry * -inhc_lookup(struct sockaddr_in *sin) -{ - struct hcentry *hc; - - hc = hc_get((struct sockaddr *)sin); - return ((struct in_hcentry *)hc); -} - -/* Look up and possibly create an entry -- must be called from user mode. */ -struct in_hcentry * -inhc_alloc(struct sockaddr_in *sin) -{ - struct in_hcentry *inhc; - struct rtentry *rt; - int error; - /* xxx mutual exclusion for smp */ - - inhc = inhc_lookup(sin); - if (inhc != 0) - return inhc; - - rt = rtalloc1(inhc->inhc_hc.hc_host, 1, 0); - if (rt == 0) - return 0; - - MALLOC(inhc, struct in_hcentry *, sizeof *inhc, M_HOSTCACHE, - M_WAITOK | M_ZERO); - inhc->inhc_hc.hc_host = dup_sockaddr((struct sockaddr *)sin, 1); - if (in_broadcast(sin->sin_addr, rt->rt_ifp)) - inhc->inhc_flags |= INHC_BROADCAST; - else if (((struct sockaddr_in *)rt->rt_ifa->ifa_addr)->sin_addr.s_addr - == sin->sin_addr.s_addr) - inhc->inhc_flags |= INHC_LOCAL; - else if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) - inhc->inhc_flags |= INHC_MULTICAST; - inhc->inhc_pmtu = rt->rt_rmx.rmx_mtu; - inhc->inhc_recvpipe = rt->rt_rmx.rmx_recvpipe; - inhc->inhc_sendpipe = rt->rt_rmx.rmx_sendpipe; - inhc->inhc_ssthresh = rt->rt_rmx.rmx_ssthresh; - if (rt->rt_rmx.rmx_locks & RTV_RTT) - inhc->inhc_rttmin = rt->rt_rmx.rmx_rtt - / (RTM_RTTUNIT / TCP_RTT_SCALE); - inhc->inhc_hc.hc_rt = rt; - error = hc_insert(&inhc->inhc_hc); - if (error != 0) { - RTFREE(rt); - FREE(inhc, M_HOSTCACHE); - return 0; - } - /* - * We don't return the structure directly because hc_get() needs - * to be allowed to do its own processing. - */ - return (inhc_lookup(sin)); -} - -/* - * This is Van Jacobson's hash function for IPv4 addresses. - * It is designed to work with a power-of-two-sized hash table. - */ -static u_long -inhc_hash(struct sockaddr *sa, u_long nbuckets) -{ - u_long ip; - - ip = ((struct sockaddr_in *)sa)->sin_addr.s_addr; - return ((ip ^ (ip >> 23) ^ (ip >> 17)) & ~(nbuckets - 1)); -} - -/* - * We don't need to do any special work... if there are no references, - * as the caller has already ensured, then it's OK to kill. - */ -static int -inhc_delete(struct hcentry *hc) -{ - return 0; -} - -/* - * Return the next increment for the number of buckets in the hash table. - * Zero means ``do not bump''. - */ -static u_long -inhc_bump(u_long oldsize) -{ - if (oldsize < 512) - return (oldsize << 1); - return 0; -} - -static struct hccallback inhc_cb = { - inhc_hash, inhc_delete, inhc_bump -}; - -int -inhc_init(void) -{ - - return (hc_init(AF_INET, &inhc_cb, 128, 0)); -} - |
