diff options
Diffstat (limited to 'sys/netns/ns_error.c')
| -rw-r--r-- | sys/netns/ns_error.c | 324 |
1 files changed, 0 insertions, 324 deletions
diff --git a/sys/netns/ns_error.c b/sys/netns/ns_error.c deleted file mode 100644 index fc4db94..0000000 --- a/sys/netns/ns_error.c +++ /dev/null @@ -1,324 +0,0 @@ -/* - * Copyright (c) 1984, 1988, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS 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. - * - * @(#)ns_error.c 8.1 (Berkeley) 6/10/93 - * $FreeBSD$ - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/malloc.h> -#include <sys/mbuf.h> -#include <sys/protosw.h> -#include <sys/socket.h> -#include <sys/time.h> -#include <sys/kernel.h> - -#include <net/route.h> - -#include <netns/ns.h> -#include <netns/ns_pcb.h> -#include <netns/idp.h> -#include <netns/ns_error.h> - -#ifdef lint -#define NS_ERRPRINTFS 1 -#endif - -#ifdef NS_ERRPRINTFS -/* - * NS_ERR routines: error generation, receive packet processing, and - * routines to turnaround packets back to the originator. - */ -int ns_errprintfs = 0; -#endif - -ns_err_x(c) -{ - register u_short *w, *lim, *base = ns_errstat.ns_es_codes; - u_short x = c; - - /* - * zero is a legit error code, handle specially - */ - if (x == 0) - return (0); - lim = base + NS_ERR_MAX - 1; - for (w = base + 1; w < lim; w++) { - if (*w == 0) - *w = x; - if (*w == x) - break; - } - return (w - base); -} - -/* - * Generate an error packet of type error - * in response to bad packet. - */ - -ns_error(om, type, param) - struct mbuf *om; - int type; -{ - register struct ns_epidp *ep; - struct mbuf *m; - struct idp *nip; - register struct idp *oip = mtod(om, struct idp *); - extern int idpcksum; - - /* - * If this packet was sent to the echo port, - * and nobody was there, just echo it. - * (Yes, this is a wart!) - */ - if (type == NS_ERR_NOSOCK && - oip->idp_dna.x_port == htons(2) && - (type = ns_echo(om))==0) - return; - -#ifdef NS_ERRPRINTFS - if (ns_errprintfs) - printf("ns_err_error(%x, %d, %d)\n", oip, type, param); -#endif - /* - * Don't Generate error packets in response to multicasts. - */ - if (oip->idp_dna.x_host.c_host[0] & 1) - goto freeit; - - ns_errstat.ns_es_error++; - /* - * Make sure that the old IDP packet had 30 bytes of data to return; - * if not, don't bother. Also don't EVER error if the old - * packet protocol was NS_ERR. - */ - if (oip->idp_len < sizeof(struct idp)) { - ns_errstat.ns_es_oldshort++; - goto freeit; - } - if (oip->idp_pt == NSPROTO_ERROR) { - ns_errstat.ns_es_oldns_err++; - goto freeit; - } - - /* - * First, formulate ns_err message - */ - m = m_gethdr(M_DONTWAIT, MT_HEADER); - if (m == NULL) - goto freeit; - m->m_len = sizeof(*ep); - MH_ALIGN(m, m->m_len); - ep = mtod(m, struct ns_epidp *); - if ((u_int)type > NS_ERR_TOO_BIG) - panic("ns_err_error"); - ns_errstat.ns_es_outhist[ns_err_x(type)]++; - ep->ns_ep_errp.ns_err_num = htons((u_short)type); - ep->ns_ep_errp.ns_err_param = htons((u_short)param); - bcopy((caddr_t)oip, (caddr_t)&ep->ns_ep_errp.ns_err_idp, 42); - nip = &ep->ns_ep_idp; - nip->idp_len = sizeof(*ep); - nip->idp_len = htons((u_short)nip->idp_len); - nip->idp_pt = NSPROTO_ERROR; - nip->idp_tc = 0; - nip->idp_dna = oip->idp_sna; - nip->idp_sna = oip->idp_dna; - if (idpcksum) { - nip->idp_sum = 0; - nip->idp_sum = ns_cksum(m, sizeof(*ep)); - } else - nip->idp_sum = 0xffff; - (void) ns_output(m, (struct route *)0, 0); - -freeit: - m_freem(om); -} - -ns_printhost(p) -register struct ns_addr *p; -{ - - printf("<net:%x%x,host:%x%x%x,port:%x>", - p->x_net.s_net[0], - p->x_net.s_net[1], - p->x_host.s_host[0], - p->x_host.s_host[1], - p->x_host.s_host[2], - p->x_port); - -} - -/* - * Process a received NS_ERR message. - */ -ns_err_input(m) - struct mbuf *m; -{ - register struct ns_errp *ep; - register struct ns_epidp *epidp = mtod(m, struct ns_epidp *); - register int i; - int type, code, param; - - /* - * Locate ns_err structure in mbuf, and check - * that not corrupted and of at least minimum length. - */ -#ifdef NS_ERRPRINTFS - if (ns_errprintfs) { - printf("ns_err_input from "); - ns_printhost(&epidp->ns_ep_idp.idp_sna); - printf("len %d\n", ntohs(epidp->ns_ep_idp.idp_len)); - } -#endif - i = sizeof (struct ns_epidp); - if (((m->m_flags & M_EXT) || m->m_len < i) && - (m = m_pullup(m, i)) == 0) { - ns_errstat.ns_es_tooshort++; - return; - } - ep = &(mtod(m, struct ns_epidp *)->ns_ep_errp); - type = ntohs(ep->ns_err_num); - param = ntohs(ep->ns_err_param); - ns_errstat.ns_es_inhist[ns_err_x(type)]++; - -#ifdef NS_ERRPRINTFS - /* - * Message type specific processing. - */ - if (ns_errprintfs) - printf("ns_err_input, type %d param %d\n", type, param); -#endif - if (type >= NS_ERR_TOO_BIG) { - goto badcode; - } - ns_errstat.ns_es_outhist[ns_err_x(type)]++; - switch (type) { - - case NS_ERR_UNREACH_HOST: - code = PRC_UNREACH_NET; - goto deliver; - - case NS_ERR_TOO_OLD: - code = PRC_TIMXCEED_INTRANS; - goto deliver; - - case NS_ERR_TOO_BIG: - code = PRC_MSGSIZE; - goto deliver; - - case NS_ERR_FULLUP: - code = PRC_QUENCH; - goto deliver; - - case NS_ERR_NOSOCK: - code = PRC_UNREACH_PORT; - goto deliver; - - case NS_ERR_UNSPEC_T: - case NS_ERR_BADSUM_T: - case NS_ERR_BADSUM: - case NS_ERR_UNSPEC: - code = PRC_PARAMPROB; - goto deliver; - - deliver: - /* - * Problem with datagram; advise higher level routines. - */ -#ifdef NS_ERRPRINTFS - if (ns_errprintfs) - printf("deliver to protocol %d\n", - ep->ns_err_idp.idp_pt); -#endif - switch(ep->ns_err_idp.idp_pt) { - case NSPROTO_SPP: - spp_ctlinput(code, (caddr_t)ep); - break; - - default: - idp_ctlinput(code, (caddr_t)ep); - } - - goto freeit; - - default: - badcode: - ns_errstat.ns_es_badcode++; - goto freeit; - - } -freeit: - m_freem(m); -} - -#ifdef notdef -u_long -nstime() -{ - int s = splclock(); - u_long t; - - t = (time.tv_sec % (24*60*60)) * 1000 + time.tv_usec / 1000; - splx(s); - return (htonl(t)); -} -#endif - -ns_echo(m) -struct mbuf *m; -{ - register struct idp *idp = mtod(m, struct idp *); - register struct echo { - struct idp ec_idp; - u_short ec_op; /* Operation, 1 = request, 2 = reply */ - } *ec = (struct echo *)idp; - struct ns_addr temp; - - if (idp->idp_pt!=NSPROTO_ECHO) return(NS_ERR_NOSOCK); - if (ec->ec_op!=htons(1)) return(NS_ERR_UNSPEC); - - ec->ec_op = htons(2); - - temp = idp->idp_dna; - idp->idp_dna = idp->idp_sna; - idp->idp_sna = temp; - - if (idp->idp_sum != 0xffff) { - idp->idp_sum = 0; - idp->idp_sum = ns_cksum(m, - (int)(((ntohs(idp->idp_len) - 1)|1)+1)); - } - (void) ns_output(m, (struct route *)0, NS_FORWARDING); - return(0); -} |
