raw_cb.c revision 180390
1139823Simp/*- 21541Srgrimes * Copyright (c) 1980, 1986, 1993 3180305Srwatson * The Regents of the University of California. 4180305Srwatson * All rights reserved. 51541Srgrimes * 61541Srgrimes * Redistribution and use in source and binary forms, with or without 71541Srgrimes * modification, are permitted provided that the following conditions 81541Srgrimes * are met: 91541Srgrimes * 1. Redistributions of source code must retain the above copyright 101541Srgrimes * notice, this list of conditions and the following disclaimer. 111541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 121541Srgrimes * notice, this list of conditions and the following disclaimer in the 131541Srgrimes * documentation and/or other materials provided with the distribution. 141541Srgrimes * 4. Neither the name of the University nor the names of its contributors 151541Srgrimes * may be used to endorse or promote products derived from this software 161541Srgrimes * without specific prior written permission. 171541Srgrimes * 181541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 191541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 201541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 211541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 221541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 231541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 241541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 251541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 261541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 271541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 281541Srgrimes * SUCH DAMAGE. 291541Srgrimes * 301541Srgrimes * @(#)raw_cb.c 8.1 (Berkeley) 6/10/93 3150477Speter * $FreeBSD: head/sys/net/raw_cb.c 180390 2008-07-09 18:39:55Z rwatson $ 321541Srgrimes */ 331541Srgrimes 341541Srgrimes#include <sys/param.h> 3596972Stanimura#include <sys/domain.h> 36130387Srwatson#include <sys/lock.h> 37180390Srwatson#include <sys/kernel.h> 3829024Sbde#include <sys/malloc.h> 39130387Srwatson#include <sys/mutex.h> 4096972Stanimura#include <sys/protosw.h> 411541Srgrimes#include <sys/socket.h> 421541Srgrimes#include <sys/socketvar.h> 43180390Srwatson#include <sys/sysctl.h> 4497093Sbde#include <sys/systm.h> 451541Srgrimes 461541Srgrimes#include <net/raw_cb.h> 471541Srgrimes 481541Srgrimes/* 498876Srgrimes * Routines to manage the raw protocol control blocks. 501541Srgrimes * 511541Srgrimes * TODO: 521541Srgrimes * hash lookups by protocol family/protocol + address family 531541Srgrimes * take care of unique address problems per AF? 541541Srgrimes * redo address binding to allow wildcards 551541Srgrimes */ 561541Srgrimes 57130514Srwatsonstruct mtx rawcb_mtx; 5824936Sphkstruct rawcb_list_head rawcb_list; 5924936Sphk 60180390SrwatsonSYSCTL_NODE(_net, OID_AUTO, raw, CTLFLAG_RW, 0, "Raw socket infrastructure"); 611541Srgrimes 62180390Srwatsonstatic u_long raw_sendspace = RAWSNDQ; 63180390SrwatsonSYSCTL_ULONG(_net_raw, OID_AUTO, sendspace, CTLFLAG_RW, &raw_sendspace, 0, 64180390Srwatson "Default raw socket send space"); 65180390Srwatson 66180390Srwatsonstatic u_long raw_recvspace = RAWRCVQ; 67180390SrwatsonSYSCTL_ULONG(_net_raw, OID_AUTO, recvspace, CTLFLAG_RW, &raw_recvspace, 0, 68180390Srwatson "Default raw socket receive space"); 69180390Srwatson 701541Srgrimes/* 71180305Srwatson * Allocate a control block and a nominal amount of buffer space for the 72180305Srwatson * socket. 731541Srgrimes */ 741541Srgrimesint 75180305Srwatsonraw_attach(struct socket *so, int proto) 761541Srgrimes{ 77180305Srwatson struct rawcb *rp = sotorawcb(so); 781541Srgrimes int error; 791541Srgrimes 801541Srgrimes /* 811541Srgrimes * It is assumed that raw_attach is called 821541Srgrimes * after space has been allocated for the 831541Srgrimes * rawcb. 841541Srgrimes */ 851541Srgrimes if (rp == 0) 861541Srgrimes return (ENOBUFS); 873443Sphk error = soreserve(so, raw_sendspace, raw_recvspace); 883443Sphk if (error) 891541Srgrimes return (error); 901541Srgrimes rp->rcb_socket = so; 911541Srgrimes rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family; 921541Srgrimes rp->rcb_proto.sp_protocol = proto; 93130514Srwatson mtx_lock(&rawcb_mtx); 9424936Sphk LIST_INSERT_HEAD(&rawcb_list, rp, list); 95130514Srwatson mtx_unlock(&rawcb_mtx); 961541Srgrimes return (0); 971541Srgrimes} 981541Srgrimes 991541Srgrimes/* 100180305Srwatson * Detach the raw connection block and discard socket resources. 1011541Srgrimes */ 1021541Srgrimesvoid 103180305Srwatsonraw_detach(struct rawcb *rp) 1041541Srgrimes{ 1051541Srgrimes struct socket *so = rp->rcb_socket; 1061541Srgrimes 107157370Srwatson KASSERT(so->so_pcb == rp, ("raw_detach: so_pcb != rp")); 108157370Srwatson 109157370Srwatson so->so_pcb = NULL; 110140775Srwatson mtx_lock(&rawcb_mtx); 11124936Sphk LIST_REMOVE(rp, list); 112140775Srwatson mtx_unlock(&rawcb_mtx); 1131541Srgrimes free((caddr_t)(rp), M_PCB); 1141541Srgrimes} 115