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eddfbb763d
(DPCPU), as suggested by Peter Wemm, and implement a new per-virtual network stack memory allocator. Modify vnet to use the allocator instead of monolithic global container structures (vinet, ...). This change solves many binary compatibility problems associated with VIMAGE, and restores ELF symbols for virtualized global variables. Each virtualized global variable exists as a "reference copy", and also once per virtual network stack. Virtualized global variables are tagged at compile-time, placing the in a special linker set, which is loaded into a contiguous region of kernel memory. Virtualized global variables in the base kernel are linked as normal, but those in modules are copied and relocated to a reserved portion of the kernel's vnet region with the help of a the kernel linker. Virtualized global variables exist in per-vnet memory set up when the network stack instance is created, and are initialized statically from the reference copy. Run-time access occurs via an accessor macro, which converts from the current vnet and requested symbol to a per-vnet address. When "options VIMAGE" is not compiled into the kernel, normal global ELF symbols will be used instead and indirection is avoided. This change restores static initialization for network stack global variables, restores support for non-global symbols and types, eliminates the need for many subsystem constructors, eliminates large per-subsystem structures that caused many binary compatibility issues both for monitoring applications (netstat) and kernel modules, removes the per-function INIT_VNET_*() macros throughout the stack, eliminates the need for vnet_symmap ksym(2) munging, and eliminates duplicate definitions of virtualized globals under VIMAGE_GLOBALS. Bump __FreeBSD_version and update UPDATING. Portions submitted by: bz Reviewed by: bz, zec Discussed with: gnn, jamie, jeff, jhb, julian, sam Suggested by: peter Approved by: re (kensmith)
1867 lines
45 KiB
C
1867 lines
45 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/jail.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 <sys/vimage.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 <net/vnet.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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/* NFS read/write block size */
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#ifndef BOOTP_BLOCKSIZE
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#define BOOTP_BLOCKSIZE 8192
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#endif
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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_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_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_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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struct radix_node_head *rnh;
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printf("Routing table:\n");
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rnh = rt_tables_get_rnh(0, AF_INET);
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if (rnh == NULL)
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return;
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RADIX_NODE_HEAD_RLOCK(rnh); /* could sleep XXX */
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bootpboot_p_tree(rnh->rnh_treetop);
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RADIX_NODE_HEAD_RUNLOCK(rnh);
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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(&V_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) */
|
|
(void) bootpc_tag(&gctx->tmptag, &gctx->reply,
|
|
gctx->replylen,
|
|
TAG_END);
|
|
|
|
/* If packet is invalid, ignore it */
|
|
if (gctx->tmptag.badopt != 0)
|
|
return 0;
|
|
|
|
p = bootpc_tag(&gctx->tmptag, &gctx->reply,
|
|
gctx->replylen, TAG_DHCP_MSGTYPE);
|
|
if (p != NULL)
|
|
dhcpreplytype = *p;
|
|
else
|
|
dhcpreplytype = DHCP_NOMSG;
|
|
|
|
switch (ifctx->dhcpquerytype) {
|
|
case DHCP_DISCOVER:
|
|
if (dhcpreplytype != DHCP_OFFER /* Normal DHCP offer */
|
|
#ifndef BOOTP_FORCE_DHCP
|
|
&& dhcpreplytype != DHCP_NOMSG /* Fallback to BOOTP */
|
|
#endif
|
|
)
|
|
return 0;
|
|
break;
|
|
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;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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);
|
|
/* XXX MRT just table 0 */
|
|
error = rtrequest_fib(RTM_ADD,
|
|
(struct sockaddr *) &defdst,
|
|
(struct sockaddr *) gw,
|
|
(struct sockaddr *) &defmask,
|
|
(RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL, 0);
|
|
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 = BOOTP_BLOCKSIZE;
|
|
args->wsize = BOOTP_BLOCKSIZE;
|
|
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);
|
|
mtx_lock(&prison0.pr_mtx);
|
|
strcpy(prison0.pr_hostname, p);
|
|
mtx_unlock(&prison0.pr_mtx);
|
|
printf("hostname %s ", p);
|
|
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(&V_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(&V_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;
|
|
|
|
#define RPCPROG_MNT 100005
|
|
#define RPCMNT_VER1 1
|
|
#define RPCMNT_VER3 3
|
|
#define RPCMNT_MOUNT 1
|
|
#define AUTH_SYS 1 /* unix style (uid, gids) */
|
|
#define AUTH_UNIX AUTH_SYS
|
|
|
|
/* 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 == AUTH_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);
|