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1866 lines
44 KiB
C
1866 lines
44 KiB
C
/*-
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* Copyright (c) 1995 Gordon Ross, Adam Glass
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* Copyright (c) 1992 Regents of the University of California.
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* All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* based on:
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* nfs/krpc_subr.c
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* $NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_bootp.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/sockio.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/mbuf.h>
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#include <sys/proc.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/uio.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <net/if_types.h>
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#include <net/if_dl.h>
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#include <rpc/rpcclnt.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfsclient/nfs.h>
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#include <nfsclient/nfsdiskless.h>
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#include <nfsclient/krpc.h>
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#include <nfs/xdr_subs.h>
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#define BOOTP_MIN_LEN 300 /* Minimum size of bootp udp packet */
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#ifndef BOOTP_SETTLE_DELAY
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#define BOOTP_SETTLE_DELAY 3
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#endif
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/*
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* What is the longest we will wait before re-sending a request?
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* Note this is also the frequency of "RPC timeout" messages.
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* The re-send loop count sup linearly to this maximum, so the
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* first complaint will happen after (1+2+3+4+5)=15 seconds.
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*/
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#define MAX_RESEND_DELAY 5 /* seconds */
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/* Definitions from RFC951 */
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struct bootp_packet {
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u_int8_t op;
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u_int8_t htype;
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u_int8_t hlen;
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u_int8_t hops;
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u_int32_t xid;
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u_int16_t secs;
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u_int16_t flags;
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struct in_addr ciaddr;
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struct in_addr yiaddr;
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struct in_addr siaddr;
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struct in_addr giaddr;
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unsigned char chaddr[16];
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char sname[64];
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char file[128];
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unsigned char vend[1222];
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};
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struct bootpc_ifcontext {
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struct bootpc_ifcontext *next;
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struct bootp_packet call;
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struct bootp_packet reply;
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int replylen;
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int overload;
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struct socket *so;
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struct ifreq ireq;
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struct ifnet *ifp;
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struct sockaddr_dl *sdl;
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struct sockaddr_in myaddr;
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struct sockaddr_in netmask;
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struct sockaddr_in gw;
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struct sockaddr_in broadcast; /* Different for each interface */
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int gotgw;
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int gotnetmask;
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int gotrootpath;
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int outstanding;
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int sentmsg;
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u_int32_t xid;
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enum {
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IF_BOOTP_UNRESOLVED,
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IF_BOOTP_RESOLVED,
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IF_BOOTP_FAILED,
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IF_DHCP_UNRESOLVED,
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IF_DHCP_OFFERED,
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IF_DHCP_RESOLVED,
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IF_DHCP_FAILED,
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} state;
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int dhcpquerytype; /* dhcp type sent */
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struct in_addr dhcpserver;
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int gotdhcpserver;
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};
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#define TAG_MAXLEN 1024
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struct bootpc_tagcontext {
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char buf[TAG_MAXLEN + 1];
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int overload;
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int badopt;
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int badtag;
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int foundopt;
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int taglen;
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};
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struct bootpc_globalcontext {
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struct bootpc_ifcontext *interfaces;
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struct bootpc_ifcontext *lastinterface;
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u_int32_t xid;
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int gotrootpath;
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int gotgw;
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int ifnum;
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int secs;
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int starttime;
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struct bootp_packet reply;
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int replylen;
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struct bootpc_ifcontext *setrootfs;
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struct bootpc_ifcontext *sethostname;
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struct bootpc_tagcontext tmptag;
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struct bootpc_tagcontext tag;
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};
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#define IPPORT_BOOTPC 68
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#define IPPORT_BOOTPS 67
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#define BOOTP_REQUEST 1
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#define BOOTP_REPLY 2
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/* Common tags */
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#define TAG_PAD 0 /* Pad option, implicit length 1 */
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#define TAG_SUBNETMASK 1 /* RFC 950 subnet mask */
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#define TAG_ROUTERS 3 /* Routers (in order of preference) */
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#define TAG_HOSTNAME 12 /* Client host name */
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#define TAG_ROOT 17 /* Root path */
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/* DHCP specific tags */
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#define TAG_OVERLOAD 52 /* Option Overload */
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#define TAG_MAXMSGSIZE 57 /* Maximum DHCP Message Size */
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#define TAG_END 255 /* End Option (i.e. no more options) */
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/* Overload values */
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#define OVERLOAD_FILE 1
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#define OVERLOAD_SNAME 2
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/* Site specific tags: */
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#define TAG_ROOTOPTS 130
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#define TAG_COOKIE 134 /* ascii info for userland, via sysctl */
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#define TAG_DHCP_MSGTYPE 53
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#define TAG_DHCP_REQ_ADDR 50
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#define TAG_DHCP_SERVERID 54
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#define TAG_DHCP_LEASETIME 51
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#define TAG_VENDOR_INDENTIFIER 60
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#define DHCP_NOMSG 0
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#define DHCP_DISCOVER 1
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#define DHCP_OFFER 2
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#define DHCP_REQUEST 3
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#define DHCP_ACK 5
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static char bootp_cookie[128];
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SYSCTL_STRING(_kern, OID_AUTO, bootp_cookie, CTLFLAG_RD,
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bootp_cookie, 0, "Cookie (T134) supplied by bootp server");
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/* mountd RPC */
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static int md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp,
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int *fhsizep, struct nfs_args *args, struct thread *td);
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static int setfs(struct sockaddr_in *addr, char *path, char *p,
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const struct in_addr *siaddr);
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static int getdec(char **ptr);
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static int getip(char **ptr, struct in_addr *ip);
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static void mountopts(struct nfs_args *args, char *p);
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static int xdr_opaque_decode(struct mbuf **ptr, u_char *buf, int len);
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static int xdr_int_decode(struct mbuf **ptr, int *iptr);
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static void print_in_addr(struct in_addr addr);
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static void print_sin_addr(struct sockaddr_in *addr);
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static void clear_sinaddr(struct sockaddr_in *sin);
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static void allocifctx(struct bootpc_globalcontext *gctx);
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static void bootpc_compose_query(struct bootpc_ifcontext *ifctx,
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struct bootpc_globalcontext *gctx, struct thread *td);
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static unsigned char *bootpc_tag(struct bootpc_tagcontext *tctx,
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struct bootp_packet *bp, int len, int tag);
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static void bootpc_tag_helper(struct bootpc_tagcontext *tctx,
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unsigned char *start, int len, int tag);
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#ifdef BOOTP_DEBUG
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void bootpboot_p_sa(struct sockaddr *sa, struct sockaddr *ma);
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void bootpboot_p_ma(struct sockaddr *ma);
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void bootpboot_p_rtentry(struct rtentry *rt);
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void bootpboot_p_tree(struct radix_node *rn);
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void bootpboot_p_rtlist(void);
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void bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa);
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void bootpboot_p_iflist(void);
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#endif
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static int bootpc_call(struct bootpc_globalcontext *gctx,
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struct thread *td);
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static int bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
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struct bootpc_globalcontext *gctx, struct thread *td);
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static int bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
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struct bootpc_globalcontext *gctx, struct thread *td);
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static void bootpc_decode_reply(struct nfsv3_diskless *nd,
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struct bootpc_ifcontext *ifctx,
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struct bootpc_globalcontext *gctx);
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static int bootpc_received(struct bootpc_globalcontext *gctx,
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struct bootpc_ifcontext *ifctx);
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static __inline int bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx);
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static __inline int bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx);
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static __inline int bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx);
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/*
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* In order to have multiple active interfaces with address 0.0.0.0
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* and be able to send data to a selected interface, we perform
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* some tricks:
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*
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* - The 'broadcast' address is different for each interface.
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*
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* - We temporarily add routing pointing 255.255.255.255 to the
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* selected interface broadcast address, thus the packet sent
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* goes to that interface.
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*/
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#ifdef BOOTP_DEBUG
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void
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bootpboot_p_sa(struct sockaddr *sa, struct sockaddr *ma)
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{
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if (sa == NULL) {
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printf("(sockaddr *) <null>");
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return;
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}
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switch (sa->sa_family) {
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case AF_INET:
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{
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struct sockaddr_in *sin;
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sin = (struct sockaddr_in *) sa;
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printf("inet ");
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print_sin_addr(sin);
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if (ma != NULL) {
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sin = (struct sockaddr_in *) ma;
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printf(" mask ");
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print_sin_addr(sin);
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}
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}
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break;
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case AF_LINK:
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{
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struct sockaddr_dl *sli;
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int i;
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sli = (struct sockaddr_dl *) sa;
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printf("link %.*s ", sli->sdl_nlen, sli->sdl_data);
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for (i = 0; i < sli->sdl_alen; i++) {
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if (i > 0)
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printf(":");
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printf("%x", ((unsigned char *) LLADDR(sli))[i]);
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}
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}
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break;
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default:
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printf("af%d", sa->sa_family);
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}
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}
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void
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bootpboot_p_ma(struct sockaddr *ma)
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{
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if (ma == NULL) {
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printf("<null>");
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return;
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}
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printf("%x", *(int *)ma);
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}
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void
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bootpboot_p_rtentry(struct rtentry *rt)
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{
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bootpboot_p_sa(rt_key(rt), rt_mask(rt));
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printf(" ");
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bootpboot_p_ma(rt->rt_genmask);
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printf(" ");
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bootpboot_p_sa(rt->rt_gateway, NULL);
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printf(" ");
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printf("flags %x", (unsigned short) rt->rt_flags);
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printf(" %d", (int) rt->rt_rmx.rmx_expire);
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printf(" %s\n", rt->rt_ifp->if_xname);
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}
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void
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bootpboot_p_tree(struct radix_node *rn)
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{
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while (rn != NULL) {
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if (rn->rn_bit < 0) {
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if ((rn->rn_flags & RNF_ROOT) != 0) {
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} else {
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bootpboot_p_rtentry((struct rtentry *) rn);
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}
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rn = rn->rn_dupedkey;
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} else {
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bootpboot_p_tree(rn->rn_left);
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bootpboot_p_tree(rn->rn_right);
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return;
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}
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}
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}
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void
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bootpboot_p_rtlist(void)
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{
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printf("Routing table:\n");
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RADIX_NODE_LOCK(rt_tables[AF_INET]); /* could sleep XXX */
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bootpboot_p_tree(rt_tables[AF_INET]->rnh_treetop);
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RADIX_NODE_UNLOCK(rt_tables[AF_INET]);
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}
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void
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bootpboot_p_if(struct ifnet *ifp, struct ifaddr *ifa)
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{
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printf("%s flags %x, addr ",
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ifp->if_xname, ifp->if_flags);
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print_sin_addr((struct sockaddr_in *) ifa->ifa_addr);
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printf(", broadcast ");
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print_sin_addr((struct sockaddr_in *) ifa->ifa_dstaddr);
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printf(", netmask ");
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print_sin_addr((struct sockaddr_in *) ifa->ifa_netmask);
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printf("\n");
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}
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void
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bootpboot_p_iflist(void)
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{
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struct ifnet *ifp;
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struct ifaddr *ifa;
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printf("Interface list:\n");
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IFNET_RLOCK(); /* could sleep, but okay for debugging XXX */
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for (ifp = TAILQ_FIRST(&ifnet);
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ifp != NULL;
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ifp = TAILQ_NEXT(ifp, if_link)) {
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for (ifa = TAILQ_FIRST(&ifp->if_addrhead);
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ifa != NULL;
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ifa = TAILQ_NEXT(ifa, ifa_link))
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if (ifa->ifa_addr->sa_family == AF_INET)
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bootpboot_p_if(ifp, ifa);
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}
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IFNET_RUNLOCK();
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}
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#endif /* defined(BOOTP_DEBUG) */
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static void
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clear_sinaddr(struct sockaddr_in *sin)
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{
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bzero(sin, sizeof(*sin));
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sin->sin_len = sizeof(*sin);
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sin->sin_family = AF_INET;
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sin->sin_addr.s_addr = INADDR_ANY; /* XXX: htonl(INAADDR_ANY) ? */
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sin->sin_port = 0;
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}
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static void
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allocifctx(struct bootpc_globalcontext *gctx)
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{
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struct bootpc_ifcontext *ifctx;
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ifctx = (struct bootpc_ifcontext *) malloc(sizeof(*ifctx),
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M_TEMP, M_WAITOK | M_ZERO);
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if (ifctx == NULL)
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panic("Failed to allocate bootp interface context structure");
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ifctx->xid = gctx->xid;
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#ifdef BOOTP_NO_DHCP
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ifctx->state = IF_BOOTP_UNRESOLVED;
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#else
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ifctx->state = IF_DHCP_UNRESOLVED;
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#endif
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gctx->xid += 0x100;
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if (gctx->interfaces != NULL)
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gctx->lastinterface->next = ifctx;
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else
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gctx->interfaces = ifctx;
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gctx->lastinterface = ifctx;
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}
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static __inline int
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bootpc_ifctx_isresolved(struct bootpc_ifcontext *ifctx)
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{
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if (ifctx->state == IF_BOOTP_RESOLVED ||
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ifctx->state == IF_DHCP_RESOLVED)
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return 1;
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return 0;
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}
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static __inline int
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bootpc_ifctx_isunresolved(struct bootpc_ifcontext *ifctx)
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{
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if (ifctx->state == IF_BOOTP_UNRESOLVED ||
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ifctx->state == IF_DHCP_UNRESOLVED)
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return 1;
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return 0;
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}
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static __inline int
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bootpc_ifctx_isfailed(struct bootpc_ifcontext *ifctx)
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{
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if (ifctx->state == IF_BOOTP_FAILED ||
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ifctx->state == IF_DHCP_FAILED)
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return 1;
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return 0;
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}
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static int
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bootpc_received(struct bootpc_globalcontext *gctx,
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struct bootpc_ifcontext *ifctx)
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{
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unsigned char dhcpreplytype;
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char *p;
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/*
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* Need timeout for fallback to less
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* desirable alternative.
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*/
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/* This call used for the side effect (badopt flag) */
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(void) bootpc_tag(&gctx->tmptag, &gctx->reply,
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gctx->replylen,
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TAG_END);
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/* If packet is invalid, ignore it */
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if (gctx->tmptag.badopt != 0)
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return 0;
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p = bootpc_tag(&gctx->tmptag, &gctx->reply,
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gctx->replylen, TAG_DHCP_MSGTYPE);
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if (p != NULL)
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dhcpreplytype = *p;
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else
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dhcpreplytype = DHCP_NOMSG;
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switch (ifctx->dhcpquerytype) {
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case DHCP_DISCOVER:
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if (dhcpreplytype != DHCP_OFFER /* Normal DHCP offer */
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|
#ifndef BOOTP_FORCE_DHCP
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|
&& dhcpreplytype != DHCP_NOMSG /* Fallback to BOOTP */
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|
#endif
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)
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return 0;
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break;
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|
case DHCP_REQUEST:
|
|
if (dhcpreplytype != DHCP_ACK)
|
|
return 0;
|
|
case DHCP_NOMSG:
|
|
break;
|
|
}
|
|
|
|
/* Ignore packet unless it gives us a root tag we didn't have */
|
|
|
|
if ((ifctx->state == IF_BOOTP_RESOLVED ||
|
|
(ifctx->dhcpquerytype == DHCP_DISCOVER &&
|
|
(ifctx->state == IF_DHCP_OFFERED ||
|
|
ifctx->state == IF_DHCP_RESOLVED))) &&
|
|
(bootpc_tag(&gctx->tmptag, &ifctx->reply,
|
|
ifctx->replylen,
|
|
TAG_ROOT) != NULL ||
|
|
bootpc_tag(&gctx->tmptag, &gctx->reply,
|
|
gctx->replylen,
|
|
TAG_ROOT) == NULL))
|
|
return 0;
|
|
|
|
bcopy(&gctx->reply, &ifctx->reply, gctx->replylen);
|
|
ifctx->replylen = gctx->replylen;
|
|
|
|
/* XXX: Only reset if 'perfect' response */
|
|
if (ifctx->state == IF_BOOTP_UNRESOLVED)
|
|
ifctx->state = IF_BOOTP_RESOLVED;
|
|
else if (ifctx->state == IF_DHCP_UNRESOLVED &&
|
|
ifctx->dhcpquerytype == DHCP_DISCOVER) {
|
|
if (dhcpreplytype == DHCP_OFFER)
|
|
ifctx->state = IF_DHCP_OFFERED;
|
|
else
|
|
ifctx->state = IF_BOOTP_RESOLVED; /* Fallback */
|
|
} else if (ifctx->state == IF_DHCP_OFFERED &&
|
|
ifctx->dhcpquerytype == DHCP_REQUEST)
|
|
ifctx->state = IF_DHCP_RESOLVED;
|
|
|
|
|
|
if (ifctx->dhcpquerytype == DHCP_DISCOVER &&
|
|
ifctx->state != IF_BOOTP_RESOLVED) {
|
|
p = bootpc_tag(&gctx->tmptag, &ifctx->reply,
|
|
ifctx->replylen, TAG_DHCP_SERVERID);
|
|
if (p != NULL && gctx->tmptag.taglen == 4) {
|
|
memcpy(&ifctx->dhcpserver, p, 4);
|
|
ifctx->gotdhcpserver = 1;
|
|
} else
|
|
ifctx->gotdhcpserver = 0;
|
|
return 1;
|
|
}
|
|
|
|
ifctx->gotrootpath = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
|
|
ifctx->replylen,
|
|
TAG_ROOT) != NULL);
|
|
ifctx->gotgw = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
|
|
ifctx->replylen,
|
|
TAG_ROUTERS) != NULL);
|
|
ifctx->gotnetmask = (bootpc_tag(&gctx->tmptag, &ifctx->reply,
|
|
ifctx->replylen,
|
|
TAG_SUBNETMASK) != NULL);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
bootpc_call(struct bootpc_globalcontext *gctx, struct thread *td)
|
|
{
|
|
struct socket *so;
|
|
struct sockaddr_in *sin, dst;
|
|
struct uio auio;
|
|
struct sockopt sopt;
|
|
struct iovec aio;
|
|
int error, on, rcvflg, timo, len;
|
|
time_t atimo;
|
|
time_t rtimo;
|
|
struct timeval tv;
|
|
struct bootpc_ifcontext *ifctx;
|
|
int outstanding;
|
|
int gotrootpath;
|
|
int retry;
|
|
const char *s;
|
|
|
|
NET_ASSERT_GIANT();
|
|
|
|
/*
|
|
* Create socket and set its recieve timeout.
|
|
*/
|
|
error = socreate(AF_INET, &so, SOCK_DGRAM, 0, td->td_ucred, td);
|
|
if (error != 0)
|
|
goto out0;
|
|
|
|
tv.tv_sec = 1;
|
|
tv.tv_usec = 0;
|
|
bzero(&sopt, sizeof(sopt));
|
|
sopt.sopt_dir = SOPT_SET;
|
|
sopt.sopt_level = SOL_SOCKET;
|
|
sopt.sopt_name = SO_RCVTIMEO;
|
|
sopt.sopt_val = &tv;
|
|
sopt.sopt_valsize = sizeof tv;
|
|
|
|
error = sosetopt(so, &sopt);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
/*
|
|
* Enable broadcast.
|
|
*/
|
|
on = 1;
|
|
sopt.sopt_name = SO_BROADCAST;
|
|
sopt.sopt_val = &on;
|
|
sopt.sopt_valsize = sizeof on;
|
|
|
|
error = sosetopt(so, &sopt);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
/*
|
|
* Disable routing.
|
|
*/
|
|
|
|
on = 1;
|
|
sopt.sopt_name = SO_DONTROUTE;
|
|
sopt.sopt_val = &on;
|
|
sopt.sopt_valsize = sizeof on;
|
|
|
|
error = sosetopt(so, &sopt);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
/*
|
|
* Bind the local endpoint to a bootp client port.
|
|
*/
|
|
sin = &dst;
|
|
clear_sinaddr(sin);
|
|
sin->sin_port = htons(IPPORT_BOOTPC);
|
|
error = sobind(so, (struct sockaddr *)sin, td);
|
|
if (error != 0) {
|
|
printf("bind failed\n");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Setup socket address for the server.
|
|
*/
|
|
sin = &dst;
|
|
clear_sinaddr(sin);
|
|
sin->sin_addr.s_addr = INADDR_BROADCAST;
|
|
sin->sin_port = htons(IPPORT_BOOTPS);
|
|
|
|
/*
|
|
* Send it, repeatedly, until a reply is received,
|
|
* but delay each re-send by an increasing amount.
|
|
* If the delay hits the maximum, start complaining.
|
|
*/
|
|
timo = 0;
|
|
rtimo = 0;
|
|
for (;;) {
|
|
|
|
outstanding = 0;
|
|
gotrootpath = 0;
|
|
|
|
for (ifctx = gctx->interfaces;
|
|
ifctx != NULL;
|
|
ifctx = ifctx->next) {
|
|
if (bootpc_ifctx_isresolved(ifctx) != 0 &&
|
|
bootpc_tag(&gctx->tmptag, &ifctx->reply,
|
|
ifctx->replylen,
|
|
TAG_ROOT) != NULL)
|
|
gotrootpath = 1;
|
|
}
|
|
|
|
for (ifctx = gctx->interfaces;
|
|
ifctx != NULL;
|
|
ifctx = ifctx->next) {
|
|
ifctx->outstanding = 0;
|
|
if (bootpc_ifctx_isresolved(ifctx) != 0 &&
|
|
gotrootpath != 0) {
|
|
continue;
|
|
}
|
|
if (bootpc_ifctx_isfailed(ifctx) != 0)
|
|
continue;
|
|
|
|
outstanding++;
|
|
ifctx->outstanding = 1;
|
|
|
|
/* Proceed to next step in DHCP negotiation */
|
|
if ((ifctx->state == IF_DHCP_OFFERED &&
|
|
ifctx->dhcpquerytype != DHCP_REQUEST) ||
|
|
(ifctx->state == IF_DHCP_UNRESOLVED &&
|
|
ifctx->dhcpquerytype != DHCP_DISCOVER) ||
|
|
(ifctx->state == IF_BOOTP_UNRESOLVED &&
|
|
ifctx->dhcpquerytype != DHCP_NOMSG)) {
|
|
ifctx->sentmsg = 0;
|
|
bootpc_compose_query(ifctx, gctx, td);
|
|
}
|
|
|
|
/* Send BOOTP request (or re-send). */
|
|
|
|
if (ifctx->sentmsg == 0) {
|
|
switch(ifctx->dhcpquerytype) {
|
|
case DHCP_DISCOVER:
|
|
s = "DHCP Discover";
|
|
break;
|
|
case DHCP_REQUEST:
|
|
s = "DHCP Request";
|
|
break;
|
|
case DHCP_NOMSG:
|
|
default:
|
|
s = "BOOTP Query";
|
|
break;
|
|
}
|
|
printf("Sending %s packet from "
|
|
"interface %s (%*D)\n",
|
|
s,
|
|
ifctx->ireq.ifr_name,
|
|
ifctx->sdl->sdl_alen,
|
|
(unsigned char *) LLADDR(ifctx->sdl),
|
|
":");
|
|
ifctx->sentmsg = 1;
|
|
}
|
|
|
|
aio.iov_base = (caddr_t) &ifctx->call;
|
|
aio.iov_len = sizeof(ifctx->call);
|
|
|
|
auio.uio_iov = &aio;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_segflg = UIO_SYSSPACE;
|
|
auio.uio_rw = UIO_WRITE;
|
|
auio.uio_offset = 0;
|
|
auio.uio_resid = sizeof(ifctx->call);
|
|
auio.uio_td = td;
|
|
|
|
/* Set netmask to 0.0.0.0 */
|
|
|
|
sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr;
|
|
clear_sinaddr(sin);
|
|
error = ifioctl(ifctx->so, SIOCSIFNETMASK,
|
|
(caddr_t) &ifctx->ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_call:"
|
|
"set if netmask, error=%d",
|
|
error);
|
|
|
|
error = sosend(so, (struct sockaddr *) &dst,
|
|
&auio, NULL, NULL, 0, td);
|
|
if (error != 0) {
|
|
printf("bootpc_call: sosend: %d state %08x\n",
|
|
error, (int) so->so_state);
|
|
}
|
|
|
|
/* XXX: Is this needed ? */
|
|
pause("bootpw", hz/10);
|
|
|
|
/* Set netmask to 255.0.0.0 */
|
|
|
|
sin = (struct sockaddr_in *) &ifctx->ireq.ifr_addr;
|
|
clear_sinaddr(sin);
|
|
sin->sin_addr.s_addr = htonl(0xff000000u);
|
|
error = ifioctl(ifctx->so, SIOCSIFNETMASK,
|
|
(caddr_t) &ifctx->ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_call:"
|
|
"set if netmask, error=%d",
|
|
error);
|
|
|
|
}
|
|
|
|
if (outstanding == 0 &&
|
|
(rtimo == 0 || time_second >= rtimo)) {
|
|
error = 0;
|
|
goto gotreply;
|
|
}
|
|
|
|
/* Determine new timeout. */
|
|
if (timo < MAX_RESEND_DELAY)
|
|
timo++;
|
|
else {
|
|
printf("DHCP/BOOTP timeout for server ");
|
|
print_sin_addr(&dst);
|
|
printf("\n");
|
|
}
|
|
|
|
/*
|
|
* Wait for up to timo seconds for a reply.
|
|
* The socket receive timeout was set to 1 second.
|
|
*/
|
|
atimo = timo + time_second;
|
|
while (time_second < atimo) {
|
|
aio.iov_base = (caddr_t) &gctx->reply;
|
|
aio.iov_len = sizeof(gctx->reply);
|
|
|
|
auio.uio_iov = &aio;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_segflg = UIO_SYSSPACE;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_offset = 0;
|
|
auio.uio_resid = sizeof(gctx->reply);
|
|
auio.uio_td = td;
|
|
|
|
rcvflg = 0;
|
|
error = soreceive(so, NULL, &auio,
|
|
NULL, NULL, &rcvflg);
|
|
gctx->secs = time_second - gctx->starttime;
|
|
for (ifctx = gctx->interfaces;
|
|
ifctx != NULL;
|
|
ifctx = ifctx->next) {
|
|
if (bootpc_ifctx_isresolved(ifctx) != 0 ||
|
|
bootpc_ifctx_isfailed(ifctx) != 0)
|
|
continue;
|
|
|
|
ifctx->call.secs = htons(gctx->secs);
|
|
}
|
|
if (error == EWOULDBLOCK)
|
|
continue;
|
|
if (error != 0)
|
|
goto out;
|
|
len = sizeof(gctx->reply) - auio.uio_resid;
|
|
|
|
/* Do we have the required number of bytes ? */
|
|
if (len < BOOTP_MIN_LEN)
|
|
continue;
|
|
gctx->replylen = len;
|
|
|
|
/* Is it a reply? */
|
|
if (gctx->reply.op != BOOTP_REPLY)
|
|
continue;
|
|
|
|
/* Is this an answer to our query */
|
|
for (ifctx = gctx->interfaces;
|
|
ifctx != NULL;
|
|
ifctx = ifctx->next) {
|
|
if (gctx->reply.xid != ifctx->call.xid)
|
|
continue;
|
|
|
|
/* Same HW address size ? */
|
|
if (gctx->reply.hlen != ifctx->call.hlen)
|
|
continue;
|
|
|
|
/* Correct HW address ? */
|
|
if (bcmp(gctx->reply.chaddr,
|
|
ifctx->call.chaddr,
|
|
ifctx->call.hlen) != 0)
|
|
continue;
|
|
|
|
break;
|
|
}
|
|
|
|
if (ifctx != NULL) {
|
|
s = bootpc_tag(&gctx->tmptag,
|
|
&gctx->reply,
|
|
gctx->replylen,
|
|
TAG_DHCP_MSGTYPE);
|
|
if (s != NULL) {
|
|
switch (*s) {
|
|
case DHCP_OFFER:
|
|
s = "DHCP Offer";
|
|
break;
|
|
case DHCP_ACK:
|
|
s = "DHCP Ack";
|
|
break;
|
|
default:
|
|
s = "DHCP (unexpected)";
|
|
break;
|
|
}
|
|
} else
|
|
s = "BOOTP Reply";
|
|
|
|
printf("Received %s packet"
|
|
" on %s from ",
|
|
s,
|
|
ifctx->ireq.ifr_name);
|
|
print_in_addr(gctx->reply.siaddr);
|
|
if (gctx->reply.giaddr.s_addr !=
|
|
htonl(INADDR_ANY)) {
|
|
printf(" via ");
|
|
print_in_addr(gctx->reply.giaddr);
|
|
}
|
|
if (bootpc_received(gctx, ifctx) != 0) {
|
|
printf(" (accepted)");
|
|
if (ifctx->outstanding) {
|
|
ifctx->outstanding = 0;
|
|
outstanding--;
|
|
}
|
|
/* Network settle delay */
|
|
if (outstanding == 0)
|
|
atimo = time_second +
|
|
BOOTP_SETTLE_DELAY;
|
|
} else
|
|
printf(" (ignored)");
|
|
if (ifctx->gotrootpath) {
|
|
gotrootpath = 1;
|
|
rtimo = time_second +
|
|
BOOTP_SETTLE_DELAY;
|
|
printf(" (got root path)");
|
|
} else
|
|
printf(" (no root path)");
|
|
printf("\n");
|
|
}
|
|
} /* while secs */
|
|
#ifdef BOOTP_TIMEOUT
|
|
if (gctx->secs > BOOTP_TIMEOUT && BOOTP_TIMEOUT > 0)
|
|
break;
|
|
#endif
|
|
/* Force a retry if halfway in DHCP negotiation */
|
|
retry = 0;
|
|
for (ifctx = gctx->interfaces; ifctx != NULL;
|
|
ifctx = ifctx->next) {
|
|
if (ifctx->state == IF_DHCP_OFFERED) {
|
|
if (ifctx->dhcpquerytype == DHCP_DISCOVER)
|
|
retry = 1;
|
|
else
|
|
ifctx->state = IF_DHCP_UNRESOLVED;
|
|
}
|
|
}
|
|
|
|
if (retry != 0)
|
|
continue;
|
|
|
|
if (gotrootpath != 0) {
|
|
gctx->gotrootpath = gotrootpath;
|
|
if (rtimo != 0 && time_second >= rtimo)
|
|
break;
|
|
}
|
|
} /* forever send/receive */
|
|
|
|
/*
|
|
* XXX: These are errors of varying seriousness being silently
|
|
* ignored
|
|
*/
|
|
|
|
for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
|
|
if (bootpc_ifctx_isresolved(ifctx) == 0) {
|
|
printf("%s timeout for interface %s\n",
|
|
ifctx->dhcpquerytype != DHCP_NOMSG ?
|
|
"DHCP" : "BOOTP",
|
|
ifctx->ireq.ifr_name);
|
|
}
|
|
}
|
|
if (gctx->gotrootpath != 0) {
|
|
#if 0
|
|
printf("Got a root path, ignoring remaining timeout\n");
|
|
#endif
|
|
error = 0;
|
|
goto out;
|
|
}
|
|
#ifndef BOOTP_NFSROOT
|
|
for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
|
|
if (bootpc_ifctx_isresolved(ifctx) != 0) {
|
|
error = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
#endif
|
|
error = ETIMEDOUT;
|
|
goto out;
|
|
|
|
gotreply:
|
|
out:
|
|
soclose(so);
|
|
out0:
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
bootpc_fakeup_interface(struct bootpc_ifcontext *ifctx,
|
|
struct bootpc_globalcontext *gctx, struct thread *td)
|
|
{
|
|
struct sockaddr_in *sin;
|
|
int error;
|
|
struct ifreq *ireq;
|
|
struct socket *so;
|
|
struct ifaddr *ifa;
|
|
struct sockaddr_dl *sdl;
|
|
|
|
NET_ASSERT_GIANT();
|
|
|
|
error = socreate(AF_INET, &ifctx->so, SOCK_DGRAM, 0, td->td_ucred, td);
|
|
if (error != 0)
|
|
panic("nfs_boot: socreate, error=%d", error);
|
|
|
|
ireq = &ifctx->ireq;
|
|
so = ifctx->so;
|
|
|
|
/*
|
|
* Bring up the interface.
|
|
*
|
|
* Get the old interface flags and or IFF_UP into them; if
|
|
* IFF_UP set blindly, interface selection can be clobbered.
|
|
*/
|
|
error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_fakeup_interface: GIFFLAGS, error=%d", error);
|
|
ireq->ifr_flags |= IFF_UP;
|
|
error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_fakeup_interface: SIFFLAGS, error=%d", error);
|
|
|
|
/*
|
|
* Do enough of ifconfig(8) so that the chosen interface
|
|
* can talk to the servers. (just set the address)
|
|
*/
|
|
|
|
/* addr is 0.0.0.0 */
|
|
|
|
sin = (struct sockaddr_in *) &ireq->ifr_addr;
|
|
clear_sinaddr(sin);
|
|
error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, td);
|
|
if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces))
|
|
panic("bootpc_fakeup_interface: "
|
|
"set if addr, error=%d", error);
|
|
|
|
/* netmask is 255.0.0.0 */
|
|
|
|
sin = (struct sockaddr_in *) &ireq->ifr_addr;
|
|
clear_sinaddr(sin);
|
|
sin->sin_addr.s_addr = htonl(0xff000000u);
|
|
error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_fakeup_interface: set if netmask, error=%d",
|
|
error);
|
|
|
|
/* Broadcast is 255.255.255.255 */
|
|
|
|
sin = (struct sockaddr_in *)&ireq->ifr_addr;
|
|
clear_sinaddr(sin);
|
|
clear_sinaddr(&ifctx->broadcast);
|
|
sin->sin_addr.s_addr = htonl(INADDR_BROADCAST);
|
|
ifctx->broadcast.sin_addr.s_addr = sin->sin_addr.s_addr;
|
|
|
|
error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_fakeup_interface: "
|
|
"set if broadcast addr, error=%d",
|
|
error);
|
|
|
|
/* Get HW address */
|
|
|
|
sdl = NULL;
|
|
TAILQ_FOREACH(ifa, &ifctx->ifp->if_addrhead, ifa_link)
|
|
if (ifa->ifa_addr->sa_family == AF_LINK) {
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
|
if (sdl->sdl_type == IFT_ETHER)
|
|
break;
|
|
}
|
|
|
|
if (sdl == NULL)
|
|
panic("bootpc: Unable to find HW address for %s",
|
|
ifctx->ireq.ifr_name);
|
|
ifctx->sdl = sdl;
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
static int
|
|
bootpc_adjust_interface(struct bootpc_ifcontext *ifctx,
|
|
struct bootpc_globalcontext *gctx, struct thread *td)
|
|
{
|
|
int error;
|
|
struct sockaddr_in defdst;
|
|
struct sockaddr_in defmask;
|
|
struct sockaddr_in *sin;
|
|
struct ifreq *ireq;
|
|
struct socket *so;
|
|
struct sockaddr_in *myaddr;
|
|
struct sockaddr_in *netmask;
|
|
struct sockaddr_in *gw;
|
|
|
|
ireq = &ifctx->ireq;
|
|
so = ifctx->so;
|
|
myaddr = &ifctx->myaddr;
|
|
netmask = &ifctx->netmask;
|
|
gw = &ifctx->gw;
|
|
|
|
if (bootpc_ifctx_isresolved(ifctx) == 0) {
|
|
|
|
/* Shutdown interfaces where BOOTP failed */
|
|
|
|
printf("Shutdown interface %s\n", ifctx->ireq.ifr_name);
|
|
error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_adjust_interface: "
|
|
"SIOCGIFFLAGS, error=%d", error);
|
|
ireq->ifr_flags &= ~IFF_UP;
|
|
error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_adjust_interface: "
|
|
"SIOCSIFFLAGS, error=%d", error);
|
|
|
|
sin = (struct sockaddr_in *) &ireq->ifr_addr;
|
|
clear_sinaddr(sin);
|
|
error = ifioctl(so, SIOCDIFADDR, (caddr_t) ireq, td);
|
|
if (error != 0 && (error != EEXIST ||
|
|
ifctx == gctx->interfaces))
|
|
panic("bootpc_adjust_interface: "
|
|
"SIOCDIFADDR, error=%d", error);
|
|
|
|
return 0;
|
|
}
|
|
|
|
printf("Adjusted interface %s\n", ifctx->ireq.ifr_name);
|
|
/*
|
|
* Do enough of ifconfig(8) so that the chosen interface
|
|
* can talk to the servers. (just set the address)
|
|
*/
|
|
bcopy(netmask, &ireq->ifr_addr, sizeof(*netmask));
|
|
error = ifioctl(so, SIOCSIFNETMASK, (caddr_t) ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_adjust_interface: "
|
|
"set if netmask, error=%d", error);
|
|
|
|
/* Broadcast is with host part of IP address all 1's */
|
|
|
|
sin = (struct sockaddr_in *) &ireq->ifr_addr;
|
|
clear_sinaddr(sin);
|
|
sin->sin_addr.s_addr = myaddr->sin_addr.s_addr |
|
|
~ netmask->sin_addr.s_addr;
|
|
error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t) ireq, td);
|
|
if (error != 0)
|
|
panic("bootpc_adjust_interface: "
|
|
"set if broadcast addr, error=%d", error);
|
|
|
|
bcopy(myaddr, &ireq->ifr_addr, sizeof(*myaddr));
|
|
error = ifioctl(so, SIOCSIFADDR, (caddr_t) ireq, td);
|
|
if (error != 0 && (error != EEXIST || ifctx == gctx->interfaces))
|
|
panic("bootpc_adjust_interface: "
|
|
"set if addr, error=%d", error);
|
|
|
|
/* Add new default route */
|
|
|
|
if (ifctx->gotgw != 0 || gctx->gotgw == 0) {
|
|
clear_sinaddr(&defdst);
|
|
clear_sinaddr(&defmask);
|
|
error = rtrequest(RTM_ADD,
|
|
(struct sockaddr *) &defdst,
|
|
(struct sockaddr *) gw,
|
|
(struct sockaddr *) &defmask,
|
|
(RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL);
|
|
if (error != 0) {
|
|
printf("bootpc_adjust_interface: "
|
|
"add net route, error=%d\n", error);
|
|
return error;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
setfs(struct sockaddr_in *addr, char *path, char *p,
|
|
const struct in_addr *siaddr)
|
|
{
|
|
|
|
if (getip(&p, &addr->sin_addr) == 0) {
|
|
if (siaddr != NULL && *p == '/')
|
|
bcopy(siaddr, &addr->sin_addr, sizeof(struct in_addr));
|
|
else
|
|
return 0;
|
|
} else {
|
|
if (*p != ':')
|
|
return 0;
|
|
p++;
|
|
}
|
|
|
|
addr->sin_len = sizeof(struct sockaddr_in);
|
|
addr->sin_family = AF_INET;
|
|
|
|
strlcpy(path, p, MNAMELEN);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
getip(char **ptr, struct in_addr *addr)
|
|
{
|
|
char *p;
|
|
unsigned int ip;
|
|
int val;
|
|
|
|
p = *ptr;
|
|
ip = 0;
|
|
if (((val = getdec(&p)) < 0) || (val > 255))
|
|
return 0;
|
|
ip = val << 24;
|
|
if (*p != '.')
|
|
return 0;
|
|
p++;
|
|
if (((val = getdec(&p)) < 0) || (val > 255))
|
|
return 0;
|
|
ip |= (val << 16);
|
|
if (*p != '.')
|
|
return 0;
|
|
p++;
|
|
if (((val = getdec(&p)) < 0) || (val > 255))
|
|
return 0;
|
|
ip |= (val << 8);
|
|
if (*p != '.')
|
|
return 0;
|
|
p++;
|
|
if (((val = getdec(&p)) < 0) || (val > 255))
|
|
return 0;
|
|
ip |= val;
|
|
|
|
addr->s_addr = htonl(ip);
|
|
*ptr = p;
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
getdec(char **ptr)
|
|
{
|
|
char *p;
|
|
int ret;
|
|
|
|
p = *ptr;
|
|
ret = 0;
|
|
if ((*p < '0') || (*p > '9'))
|
|
return -1;
|
|
while ((*p >= '0') && (*p <= '9')) {
|
|
ret = ret * 10 + (*p - '0');
|
|
p++;
|
|
}
|
|
*ptr = p;
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
mountopts(struct nfs_args *args, char *p)
|
|
{
|
|
args->version = NFS_ARGSVERSION;
|
|
args->rsize = 8192;
|
|
args->wsize = 8192;
|
|
args->flags = NFSMNT_RSIZE | NFSMNT_WSIZE | NFSMNT_RESVPORT;
|
|
args->sotype = SOCK_DGRAM;
|
|
if (p != NULL)
|
|
nfs_parse_options(p, args);
|
|
}
|
|
|
|
static int
|
|
xdr_opaque_decode(struct mbuf **mptr, u_char *buf, int len)
|
|
{
|
|
struct mbuf *m;
|
|
int alignedlen;
|
|
|
|
m = *mptr;
|
|
alignedlen = ( len + 3 ) & ~3;
|
|
|
|
if (m->m_len < alignedlen) {
|
|
m = m_pullup(m, alignedlen);
|
|
if (m == NULL) {
|
|
*mptr = NULL;
|
|
return EBADRPC;
|
|
}
|
|
}
|
|
bcopy(mtod(m, u_char *), buf, len);
|
|
m_adj(m, alignedlen);
|
|
*mptr = m;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xdr_int_decode(struct mbuf **mptr, int *iptr)
|
|
{
|
|
u_int32_t i;
|
|
|
|
if (xdr_opaque_decode(mptr, (u_char *) &i, sizeof(u_int32_t)) != 0)
|
|
return EBADRPC;
|
|
*iptr = fxdr_unsigned(u_int32_t, i);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
print_sin_addr(struct sockaddr_in *sin)
|
|
{
|
|
|
|
print_in_addr(sin->sin_addr);
|
|
}
|
|
|
|
static void
|
|
print_in_addr(struct in_addr addr)
|
|
{
|
|
unsigned int ip;
|
|
|
|
ip = ntohl(addr.s_addr);
|
|
printf("%d.%d.%d.%d",
|
|
ip >> 24, (ip >> 16) & 255, (ip >> 8) & 255, ip & 255);
|
|
}
|
|
|
|
static void
|
|
bootpc_compose_query(struct bootpc_ifcontext *ifctx,
|
|
struct bootpc_globalcontext *gctx, struct thread *td)
|
|
{
|
|
unsigned char *vendp;
|
|
unsigned char vendor_client[64];
|
|
uint32_t leasetime;
|
|
uint8_t vendor_client_len;
|
|
|
|
ifctx->gotrootpath = 0;
|
|
|
|
bzero((caddr_t) &ifctx->call, sizeof(ifctx->call));
|
|
|
|
/* bootpc part */
|
|
ifctx->call.op = BOOTP_REQUEST; /* BOOTREQUEST */
|
|
ifctx->call.htype = 1; /* 10mb ethernet */
|
|
ifctx->call.hlen = ifctx->sdl->sdl_alen;/* Hardware address length */
|
|
ifctx->call.hops = 0;
|
|
if (bootpc_ifctx_isunresolved(ifctx) != 0)
|
|
ifctx->xid++;
|
|
ifctx->call.xid = txdr_unsigned(ifctx->xid);
|
|
bcopy(LLADDR(ifctx->sdl), &ifctx->call.chaddr, ifctx->sdl->sdl_alen);
|
|
|
|
vendp = ifctx->call.vend;
|
|
*vendp++ = 99; /* RFC1048 cookie */
|
|
*vendp++ = 130;
|
|
*vendp++ = 83;
|
|
*vendp++ = 99;
|
|
*vendp++ = TAG_MAXMSGSIZE;
|
|
*vendp++ = 2;
|
|
*vendp++ = (sizeof(struct bootp_packet) >> 8) & 255;
|
|
*vendp++ = sizeof(struct bootp_packet) & 255;
|
|
|
|
snprintf(vendor_client, sizeof(vendor_client), "%s:%s:%s",
|
|
ostype, MACHINE, osrelease);
|
|
vendor_client_len = strlen(vendor_client);
|
|
*vendp++ = TAG_VENDOR_INDENTIFIER;
|
|
*vendp++ = vendor_client_len;
|
|
memcpy(vendp, vendor_client, vendor_client_len);
|
|
vendp += vendor_client_len;;
|
|
ifctx->dhcpquerytype = DHCP_NOMSG;
|
|
switch (ifctx->state) {
|
|
case IF_DHCP_UNRESOLVED:
|
|
*vendp++ = TAG_DHCP_MSGTYPE;
|
|
*vendp++ = 1;
|
|
*vendp++ = DHCP_DISCOVER;
|
|
ifctx->dhcpquerytype = DHCP_DISCOVER;
|
|
ifctx->gotdhcpserver = 0;
|
|
break;
|
|
case IF_DHCP_OFFERED:
|
|
*vendp++ = TAG_DHCP_MSGTYPE;
|
|
*vendp++ = 1;
|
|
*vendp++ = DHCP_REQUEST;
|
|
ifctx->dhcpquerytype = DHCP_REQUEST;
|
|
*vendp++ = TAG_DHCP_REQ_ADDR;
|
|
*vendp++ = 4;
|
|
memcpy(vendp, &ifctx->reply.yiaddr, 4);
|
|
vendp += 4;
|
|
if (ifctx->gotdhcpserver != 0) {
|
|
*vendp++ = TAG_DHCP_SERVERID;
|
|
*vendp++ = 4;
|
|
memcpy(vendp, &ifctx->dhcpserver, 4);
|
|
vendp += 4;
|
|
}
|
|
*vendp++ = TAG_DHCP_LEASETIME;
|
|
*vendp++ = 4;
|
|
leasetime = htonl(300);
|
|
memcpy(vendp, &leasetime, 4);
|
|
vendp += 4;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
*vendp = TAG_END;
|
|
|
|
ifctx->call.secs = 0;
|
|
ifctx->call.flags = htons(0x8000); /* We need a broadcast answer */
|
|
}
|
|
|
|
static int
|
|
bootpc_hascookie(struct bootp_packet *bp)
|
|
{
|
|
|
|
return (bp->vend[0] == 99 && bp->vend[1] == 130 &&
|
|
bp->vend[2] == 83 && bp->vend[3] == 99);
|
|
}
|
|
|
|
static void
|
|
bootpc_tag_helper(struct bootpc_tagcontext *tctx,
|
|
unsigned char *start, int len, int tag)
|
|
{
|
|
unsigned char *j;
|
|
unsigned char *ej;
|
|
unsigned char code;
|
|
|
|
if (tctx->badtag != 0 || tctx->badopt != 0)
|
|
return;
|
|
|
|
j = start;
|
|
ej = j + len;
|
|
|
|
while (j < ej) {
|
|
code = *j++;
|
|
if (code == TAG_PAD)
|
|
continue;
|
|
if (code == TAG_END)
|
|
return;
|
|
if (j >= ej || j + *j + 1 > ej) {
|
|
tctx->badopt = 1;
|
|
return;
|
|
}
|
|
len = *j++;
|
|
if (code == tag) {
|
|
if (tctx->taglen + len > TAG_MAXLEN) {
|
|
tctx->badtag = 1;
|
|
return;
|
|
}
|
|
tctx->foundopt = 1;
|
|
if (len > 0)
|
|
memcpy(tctx->buf + tctx->taglen,
|
|
j, len);
|
|
tctx->taglen += len;
|
|
}
|
|
if (code == TAG_OVERLOAD)
|
|
tctx->overload = *j;
|
|
|
|
j += len;
|
|
}
|
|
}
|
|
|
|
static unsigned char *
|
|
bootpc_tag(struct bootpc_tagcontext *tctx,
|
|
struct bootp_packet *bp, int len, int tag)
|
|
{
|
|
tctx->overload = 0;
|
|
tctx->badopt = 0;
|
|
tctx->badtag = 0;
|
|
tctx->foundopt = 0;
|
|
tctx->taglen = 0;
|
|
|
|
if (bootpc_hascookie(bp) == 0)
|
|
return NULL;
|
|
|
|
bootpc_tag_helper(tctx, &bp->vend[4],
|
|
(unsigned char *) bp + len - &bp->vend[4], tag);
|
|
|
|
if ((tctx->overload & OVERLOAD_FILE) != 0)
|
|
bootpc_tag_helper(tctx,
|
|
(unsigned char *) bp->file,
|
|
sizeof(bp->file),
|
|
tag);
|
|
if ((tctx->overload & OVERLOAD_SNAME) != 0)
|
|
bootpc_tag_helper(tctx,
|
|
(unsigned char *) bp->sname,
|
|
sizeof(bp->sname),
|
|
tag);
|
|
|
|
if (tctx->badopt != 0 || tctx->badtag != 0 || tctx->foundopt == 0)
|
|
return NULL;
|
|
tctx->buf[tctx->taglen] = '\0';
|
|
return tctx->buf;
|
|
}
|
|
|
|
static void
|
|
bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx,
|
|
struct bootpc_globalcontext *gctx)
|
|
{
|
|
char *p;
|
|
unsigned int ip;
|
|
|
|
ifctx->gotgw = 0;
|
|
ifctx->gotnetmask = 0;
|
|
|
|
clear_sinaddr(&ifctx->myaddr);
|
|
clear_sinaddr(&ifctx->netmask);
|
|
clear_sinaddr(&ifctx->gw);
|
|
|
|
ifctx->myaddr.sin_addr = ifctx->reply.yiaddr;
|
|
|
|
ip = ntohl(ifctx->myaddr.sin_addr.s_addr);
|
|
|
|
printf("%s at ", ifctx->ireq.ifr_name);
|
|
print_sin_addr(&ifctx->myaddr);
|
|
printf(" server ");
|
|
print_in_addr(ifctx->reply.siaddr);
|
|
|
|
ifctx->gw.sin_addr = ifctx->reply.giaddr;
|
|
if (ifctx->reply.giaddr.s_addr != htonl(INADDR_ANY)) {
|
|
printf(" via gateway ");
|
|
print_in_addr(ifctx->reply.giaddr);
|
|
}
|
|
|
|
/* This call used for the side effect (overload flag) */
|
|
(void) bootpc_tag(&gctx->tmptag,
|
|
&ifctx->reply, ifctx->replylen, TAG_END);
|
|
|
|
if ((gctx->tmptag.overload & OVERLOAD_SNAME) == 0)
|
|
if (ifctx->reply.sname[0] != '\0')
|
|
printf(" server name %s", ifctx->reply.sname);
|
|
if ((gctx->tmptag.overload & OVERLOAD_FILE) == 0)
|
|
if (ifctx->reply.file[0] != '\0')
|
|
printf(" boot file %s", ifctx->reply.file);
|
|
|
|
printf("\n");
|
|
|
|
p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
|
|
TAG_SUBNETMASK);
|
|
if (p != NULL) {
|
|
if (gctx->tag.taglen != 4)
|
|
panic("bootpc: subnet mask len is %d",
|
|
gctx->tag.taglen);
|
|
bcopy(p, &ifctx->netmask.sin_addr, 4);
|
|
ifctx->gotnetmask = 1;
|
|
printf("subnet mask ");
|
|
print_sin_addr(&ifctx->netmask);
|
|
printf(" ");
|
|
}
|
|
|
|
p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
|
|
TAG_ROUTERS);
|
|
if (p != NULL) {
|
|
/* Routers */
|
|
if (gctx->tag.taglen % 4)
|
|
panic("bootpc: Router Len is %d", gctx->tag.taglen);
|
|
if (gctx->tag.taglen > 0) {
|
|
bcopy(p, &ifctx->gw.sin_addr, 4);
|
|
printf("router ");
|
|
print_sin_addr(&ifctx->gw);
|
|
printf(" ");
|
|
ifctx->gotgw = 1;
|
|
gctx->gotgw = 1;
|
|
}
|
|
}
|
|
|
|
p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
|
|
TAG_ROOT);
|
|
if (p != NULL) {
|
|
if (gctx->setrootfs != NULL) {
|
|
printf("rootfs %s (ignored) ", p);
|
|
} else if (setfs(&nd->root_saddr,
|
|
nd->root_hostnam, p, &ifctx->reply.siaddr)) {
|
|
if (*p == '/') {
|
|
printf("root_server ");
|
|
print_sin_addr(&nd->root_saddr);
|
|
printf(" ");
|
|
}
|
|
printf("rootfs %s ", p);
|
|
gctx->gotrootpath = 1;
|
|
ifctx->gotrootpath = 1;
|
|
gctx->setrootfs = ifctx;
|
|
|
|
p = bootpc_tag(&gctx->tag, &ifctx->reply,
|
|
ifctx->replylen,
|
|
TAG_ROOTOPTS);
|
|
if (p != NULL) {
|
|
mountopts(&nd->root_args, p);
|
|
printf("rootopts %s ", p);
|
|
}
|
|
} else
|
|
panic("Failed to set rootfs to %s", p);
|
|
}
|
|
|
|
p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
|
|
TAG_HOSTNAME);
|
|
if (p != NULL) {
|
|
if (gctx->tag.taglen >= MAXHOSTNAMELEN)
|
|
panic("bootpc: hostname >= %d bytes",
|
|
MAXHOSTNAMELEN);
|
|
if (gctx->sethostname != NULL) {
|
|
printf("hostname %s (ignored) ", p);
|
|
} else {
|
|
strcpy(nd->my_hostnam, p);
|
|
strcpy(hostname, p);
|
|
printf("hostname %s ", hostname);
|
|
gctx->sethostname = ifctx;
|
|
}
|
|
}
|
|
p = bootpc_tag(&gctx->tag, &ifctx->reply, ifctx->replylen,
|
|
TAG_COOKIE);
|
|
if (p != NULL) { /* store in a sysctl variable */
|
|
int i, l = sizeof(bootp_cookie) - 1;
|
|
for (i = 0; i < l && p[i] != '\0'; i++)
|
|
bootp_cookie[i] = p[i];
|
|
p[i] = '\0';
|
|
}
|
|
|
|
|
|
printf("\n");
|
|
|
|
if (ifctx->gotnetmask == 0) {
|
|
if (IN_CLASSA(ntohl(ifctx->myaddr.sin_addr.s_addr)))
|
|
ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
|
|
else if (IN_CLASSB(ntohl(ifctx->myaddr.sin_addr.s_addr)))
|
|
ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
|
|
else
|
|
ifctx->netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
|
|
}
|
|
if (ifctx->gotgw == 0) {
|
|
/* Use proxyarp */
|
|
ifctx->gw.sin_addr.s_addr = ifctx->myaddr.sin_addr.s_addr;
|
|
}
|
|
}
|
|
|
|
void
|
|
bootpc_init(void)
|
|
{
|
|
struct bootpc_ifcontext *ifctx, *nctx; /* Interface BOOTP contexts */
|
|
struct bootpc_globalcontext *gctx; /* Global BOOTP context */
|
|
struct ifnet *ifp;
|
|
int error;
|
|
#ifndef BOOTP_WIRED_TO
|
|
int ifcnt;
|
|
#endif
|
|
struct nfsv3_diskless *nd;
|
|
struct thread *td;
|
|
|
|
nd = &nfsv3_diskless;
|
|
td = curthread;
|
|
|
|
/*
|
|
* If already filled in, don't touch it here
|
|
*/
|
|
if (nfs_diskless_valid != 0)
|
|
return;
|
|
|
|
gctx = malloc(sizeof(*gctx), M_TEMP, M_WAITOK | M_ZERO);
|
|
if (gctx == NULL)
|
|
panic("Failed to allocate bootp global context structure");
|
|
|
|
gctx->xid = ~0xFFFF;
|
|
gctx->starttime = time_second;
|
|
|
|
/*
|
|
* Find a network interface.
|
|
*/
|
|
#ifdef BOOTP_WIRED_TO
|
|
printf("bootpc_init: wired to interface '%s'\n",
|
|
__XSTRING(BOOTP_WIRED_TO));
|
|
allocifctx(gctx);
|
|
#else
|
|
/*
|
|
* Preallocate interface context storage, if another interface
|
|
* attaches and wins the race, it won't be eligible for bootp.
|
|
*/
|
|
IFNET_RLOCK();
|
|
for (ifp = TAILQ_FIRST(&ifnet), ifcnt = 0;
|
|
ifp != NULL;
|
|
ifp = TAILQ_NEXT(ifp, if_link)) {
|
|
if ((ifp->if_flags &
|
|
(IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
|
|
IFF_BROADCAST)
|
|
continue;
|
|
ifcnt++;
|
|
}
|
|
IFNET_RUNLOCK();
|
|
if (ifcnt == 0)
|
|
panic("bootpc_init: no eligible interfaces");
|
|
for (; ifcnt > 0; ifcnt--)
|
|
allocifctx(gctx);
|
|
#endif
|
|
|
|
IFNET_RLOCK();
|
|
for (ifp = TAILQ_FIRST(&ifnet), ifctx = gctx->interfaces;
|
|
ifp != NULL && ifctx != NULL;
|
|
ifp = TAILQ_NEXT(ifp, if_link)) {
|
|
strlcpy(ifctx->ireq.ifr_name, ifp->if_xname,
|
|
sizeof(ifctx->ireq.ifr_name));
|
|
#ifdef BOOTP_WIRED_TO
|
|
if (strcmp(ifctx->ireq.ifr_name,
|
|
__XSTRING(BOOTP_WIRED_TO)) != 0)
|
|
continue;
|
|
#else
|
|
if ((ifp->if_flags &
|
|
(IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST)) !=
|
|
IFF_BROADCAST)
|
|
continue;
|
|
#endif
|
|
ifctx->ifp = ifp;
|
|
ifctx = ifctx->next;
|
|
}
|
|
IFNET_RUNLOCK();
|
|
|
|
if (gctx->interfaces == NULL || gctx->interfaces->ifp == NULL) {
|
|
#ifdef BOOTP_WIRED_TO
|
|
panic("bootpc_init: Could not find interface specified "
|
|
"by BOOTP_WIRED_TO: "
|
|
__XSTRING(BOOTP_WIRED_TO));
|
|
#else
|
|
panic("bootpc_init: no suitable interface");
|
|
#endif
|
|
}
|
|
|
|
for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
|
|
bootpc_fakeup_interface(ifctx, gctx, td);
|
|
|
|
for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
|
|
bootpc_compose_query(ifctx, gctx, td);
|
|
|
|
error = bootpc_call(gctx, td);
|
|
|
|
if (error != 0) {
|
|
#ifdef BOOTP_NFSROOT
|
|
panic("BOOTP call failed");
|
|
#else
|
|
printf("BOOTP call failed\n");
|
|
#endif
|
|
}
|
|
|
|
rootdevnames[0] = "nfs:";
|
|
mountopts(&nd->root_args, NULL);
|
|
|
|
for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
|
|
if (bootpc_ifctx_isresolved(ifctx) != 0)
|
|
bootpc_decode_reply(nd, ifctx, gctx);
|
|
|
|
#ifdef BOOTP_NFSROOT
|
|
if (gctx->gotrootpath == 0)
|
|
panic("bootpc: No root path offered");
|
|
#endif
|
|
|
|
for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next) {
|
|
bootpc_adjust_interface(ifctx, gctx, td);
|
|
|
|
soclose(ifctx->so);
|
|
}
|
|
|
|
for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = ifctx->next)
|
|
if (ifctx->gotrootpath != 0)
|
|
break;
|
|
if (ifctx == NULL) {
|
|
for (ifctx = gctx->interfaces;
|
|
ifctx != NULL;
|
|
ifctx = ifctx->next)
|
|
if (bootpc_ifctx_isresolved(ifctx) != 0)
|
|
break;
|
|
}
|
|
if (ifctx == NULL)
|
|
goto out;
|
|
|
|
if (gctx->gotrootpath != 0) {
|
|
|
|
setenv("boot.netif.name", ifctx->ifp->if_xname);
|
|
|
|
error = md_mount(&nd->root_saddr, nd->root_hostnam,
|
|
nd->root_fh, &nd->root_fhsize,
|
|
&nd->root_args, td);
|
|
if (error != 0)
|
|
panic("nfs_boot: mountd root, error=%d", error);
|
|
|
|
nfs_diskless_valid = 3;
|
|
}
|
|
|
|
strcpy(nd->myif.ifra_name, ifctx->ireq.ifr_name);
|
|
bcopy(&ifctx->myaddr, &nd->myif.ifra_addr, sizeof(ifctx->myaddr));
|
|
bcopy(&ifctx->myaddr, &nd->myif.ifra_broadaddr, sizeof(ifctx->myaddr));
|
|
((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
|
|
ifctx->myaddr.sin_addr.s_addr |
|
|
~ ifctx->netmask.sin_addr.s_addr;
|
|
bcopy(&ifctx->netmask, &nd->myif.ifra_mask, sizeof(ifctx->netmask));
|
|
|
|
out:
|
|
for (ifctx = gctx->interfaces; ifctx != NULL; ifctx = nctx) {
|
|
nctx = ifctx->next;
|
|
free(ifctx, M_TEMP);
|
|
}
|
|
free(gctx, M_TEMP);
|
|
}
|
|
|
|
/*
|
|
* RPC: mountd/mount
|
|
* Given a server pathname, get an NFS file handle.
|
|
* Also, sets sin->sin_port to the NFS service port.
|
|
*/
|
|
static int
|
|
md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp, int *fhsizep,
|
|
struct nfs_args *args, struct thread *td)
|
|
{
|
|
struct mbuf *m;
|
|
int error;
|
|
int authunixok;
|
|
int authcount;
|
|
int authver;
|
|
|
|
/* XXX honor v2/v3 flags in args->flags? */
|
|
#ifdef BOOTP_NFSV3
|
|
/* First try NFS v3 */
|
|
/* Get port number for MOUNTD. */
|
|
error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER3,
|
|
&mdsin->sin_port, td);
|
|
if (error == 0) {
|
|
m = xdr_string_encode(path, strlen(path));
|
|
|
|
/* Do RPC to mountd. */
|
|
error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER3,
|
|
RPCMNT_MOUNT, &m, NULL, td);
|
|
}
|
|
if (error == 0) {
|
|
args->flags |= NFSMNT_NFSV3;
|
|
} else {
|
|
#endif
|
|
/* Fallback to NFS v2 */
|
|
|
|
/* Get port number for MOUNTD. */
|
|
error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER1,
|
|
&mdsin->sin_port, td);
|
|
if (error != 0)
|
|
return error;
|
|
|
|
m = xdr_string_encode(path, strlen(path));
|
|
|
|
/* Do RPC to mountd. */
|
|
error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER1,
|
|
RPCMNT_MOUNT, &m, NULL, td);
|
|
if (error != 0)
|
|
return error; /* message already freed */
|
|
|
|
#ifdef BOOTP_NFSV3
|
|
}
|
|
#endif
|
|
|
|
if (xdr_int_decode(&m, &error) != 0 || error != 0)
|
|
goto bad;
|
|
|
|
if ((args->flags & NFSMNT_NFSV3) != 0) {
|
|
if (xdr_int_decode(&m, fhsizep) != 0 ||
|
|
*fhsizep > NFSX_V3FHMAX ||
|
|
*fhsizep <= 0)
|
|
goto bad;
|
|
} else
|
|
*fhsizep = NFSX_V2FH;
|
|
|
|
if (xdr_opaque_decode(&m, fhp, *fhsizep) != 0)
|
|
goto bad;
|
|
|
|
if (args->flags & NFSMNT_NFSV3) {
|
|
if (xdr_int_decode(&m, &authcount) != 0)
|
|
goto bad;
|
|
authunixok = 0;
|
|
if (authcount < 0 || authcount > 100)
|
|
goto bad;
|
|
while (authcount > 0) {
|
|
if (xdr_int_decode(&m, &authver) != 0)
|
|
goto bad;
|
|
if (authver == RPCAUTH_UNIX)
|
|
authunixok = 1;
|
|
authcount--;
|
|
}
|
|
if (authunixok == 0)
|
|
goto bad;
|
|
}
|
|
|
|
/* Set port number for NFS use. */
|
|
error = krpc_portmap(mdsin, NFS_PROG,
|
|
(args->flags &
|
|
NFSMNT_NFSV3) ? NFS_VER3 : NFS_VER2,
|
|
&mdsin->sin_port, td);
|
|
|
|
goto out;
|
|
|
|
bad:
|
|
error = EBADRPC;
|
|
|
|
out:
|
|
m_freem(m);
|
|
return error;
|
|
}
|
|
|
|
SYSINIT(bootp_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, bootpc_init, NULL);
|