1323124Sdes/*- 276259Sgreen * Copyright (c) 1980, 1986, 1993 376259Sgreen * The Regents of the University of California. 476259Sgreen * All rights reserved. 576259Sgreen * 676259Sgreen * Redistribution and use in source and binary forms, with or without 776259Sgreen * modification, are permitted provided that the following conditions 876259Sgreen * are met: 976259Sgreen * 1. Redistributions of source code must retain the above copyright 1076259Sgreen * notice, this list of conditions and the following disclaimer. 1176259Sgreen * 2. Redistributions in binary form must reproduce the above copyright 1276259Sgreen * notice, this list of conditions and the following disclaimer in the 1376259Sgreen * documentation and/or other materials provided with the distribution. 1476259Sgreen * 4. Neither the name of the University nor the names of its contributors 1576259Sgreen * may be used to endorse or promote products derived from this software 1676259Sgreen * without specific prior written permission. 1776259Sgreen * 1876259Sgreen * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1976259Sgreen * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2076259Sgreen * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2176259Sgreen * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2276259Sgreen * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2376259Sgreen * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2476259Sgreen * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25323124Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2676259Sgreen * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2776259Sgreen * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2876259Sgreen * SUCH DAMAGE. 2976259Sgreen * 30124208Sdes * @(#)raw_cb.c 8.1 (Berkeley) 6/10/93 3176259Sgreen * $FreeBSD$ 3276259Sgreen */ 33113908Sdes 34262566Sdes#include <sys/param.h> 35126274Sdes#include <sys/domain.h> 3676259Sgreen#include <sys/lock.h> 37204917Sdes#include <sys/kernel.h> 38204917Sdes#include <sys/malloc.h> 39126274Sdes#include <sys/mutex.h> 40204917Sdes#include <sys/protosw.h> 41221420Sdes#include <sys/socket.h> 4276259Sgreen#include <sys/socketvar.h> 43204917Sdes#include <sys/sysctl.h> 4492555Sdes#include <sys/systm.h> 4592555Sdes 46126274Sdes#include <net/if.h> 4792555Sdes#include <net/raw_cb.h> 48113908Sdes#include <net/vnet.h> 4976259Sgreen 50192595Sdes/* 51192595Sdes * Routines to manage the raw protocol control blocks. 5276259Sgreen * 53221420Sdes * TODO: 54221420Sdes * hash lookups by protocol family/protocol + address family 55113908Sdes * take care of unique address problems per AF? 56221420Sdes * redo address binding to allow wildcards 57221420Sdes */ 58124208Sdes 59124208Sdesstruct mtx rawcb_mtx; 60124208SdesVNET_DEFINE(struct rawcb_list_head, rawcb_list); 6176259Sgreen 6276259Sgreenstatic SYSCTL_NODE(_net, OID_AUTO, raw, CTLFLAG_RW, 0, 6376259Sgreen "Raw socket infrastructure"); 6476259Sgreen 6576259Sgreenstatic u_long raw_sendspace = RAWSNDQ; 6676259SgreenSYSCTL_ULONG(_net_raw, OID_AUTO, sendspace, CTLFLAG_RW, &raw_sendspace, 0, 6776259Sgreen "Default raw socket send space"); 6876259Sgreen 6976259Sgreenstatic u_long raw_recvspace = RAWRCVQ; 7076259SgreenSYSCTL_ULONG(_net_raw, OID_AUTO, recvspace, CTLFLAG_RW, &raw_recvspace, 0, 7176259Sgreen "Default raw socket receive space"); 7292555Sdes 7376259Sgreen/* 7476259Sgreen * Allocate a control block and a nominal amount of buffer space for the 7592555Sdes * socket. 7692555Sdes */ 7792555Sdesint 7876259Sgreenraw_attach(struct socket *so, int proto) 79146998Sdes{ 80146998Sdes struct rawcb *rp = sotorawcb(so); 81146998Sdes int error; 8276259Sgreen 83124208Sdes /* 84124208Sdes * It is assumed that raw_attach is called after space has been 85124208Sdes * allocated for the rawcb; consumer protocols may simply allocate 86157016Sdes * type struct rawcb, or a wrapper data structure that begins with a 87124208Sdes * struct rawcb. 88124208Sdes */ 89124208Sdes KASSERT(rp != NULL, ("raw_attach: rp == NULL")); 90124208Sdes 91124208Sdes error = soreserve(so, raw_sendspace, raw_recvspace); 92226046Sdes if (error) 93226046Sdes return (error); 94226046Sdes rp->rcb_socket = so; 95226046Sdes rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family; 9676259Sgreen rp->rcb_proto.sp_protocol = proto; 9776259Sgreen mtx_lock(&rawcb_mtx); 98126274Sdes LIST_INSERT_HEAD(&V_rawcb_list, rp, list); 99126274Sdes mtx_unlock(&rawcb_mtx); 100204917Sdes return (0); 101204917Sdes} 102204917Sdes 103204917Sdes/* 104204917Sdes * Detach the raw connection block and discard socket resources. 105204917Sdes */ 106204917Sdesvoid 107204917Sdesraw_detach(struct rawcb *rp) 108204917Sdes{ 109204917Sdes struct socket *so = rp->rcb_socket; 110262566Sdes 111295367Sdes KASSERT(so->so_pcb == rp, ("raw_detach: so_pcb != rp")); 112295367Sdes 113295367Sdes so->so_pcb = NULL; 114295367Sdes mtx_lock(&rawcb_mtx); 115126274Sdes LIST_REMOVE(rp, list); 116126274Sdes mtx_unlock(&rawcb_mtx); 117126274Sdes free((caddr_t)(rp), M_PCB); 118126274Sdes} 119126274Sdes