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freebsd/sys/nfsclient/bootp_subr.c
Poul-Henning Kamp 831e32f863 Include a RFC 1533 "Maximum DHCP Message Size" option in our request. 
ISC DHCP will limit the reply length to 64 bytes for bootp replies
unless we explicitly tell it we can do more.  We tell it that we can do
1200 bytes.
2000-05-07 14:29:19 +00:00

1270 lines
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/* $FreeBSD$ */
/*
* Copyright (c) 1995 Gordon Ross, Adam Glass
* Copyright (c) 1992 Regents of the University of California.
* All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* based on:
* nfs/krpc_subr.c
* $NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp $
*/
#include "opt_bootp.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/sockio.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/uio.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfsdiskless.h>
#include <nfs/krpc.h>
#include <nfs/xdr_subs.h>
#define BOOTP_MIN_LEN 300 /* Minimum size of bootp udp packet */
/*
* What is the longest we will wait before re-sending a request?
* Note this is also the frequency of "RPC timeout" messages.
* The re-send loop count sup linearly to this maximum, so the
* first complaint will happen after (1+2+3+4+5)=15 seconds.
*/
#define MAX_RESEND_DELAY 5 /* seconds */
/* Definitions from RFC951 */
struct bootp_packet {
u_int8_t op;
u_int8_t htype;
u_int8_t hlen;
u_int8_t hops;
u_int32_t xid;
u_int16_t secs;
u_int16_t flags;
struct in_addr ciaddr;
struct in_addr yiaddr;
struct in_addr siaddr;
struct in_addr giaddr;
unsigned char chaddr[16];
char sname[64];
char file[128];
unsigned char vend[256];
};
#define IPPORT_BOOTPC 68
#define IPPORT_BOOTPS 67
extern int nfs_diskless_valid;
extern struct nfsv3_diskless nfsv3_diskless;
/* mountd RPC */
static int md_mount __P((struct sockaddr_in *mdsin, char *path,
u_char *fhp, int *fhsizep, struct nfs_args *args,struct proc *procp));
static int md_lookup_swap __P((struct sockaddr_in *mdsin,char *path,
u_char *fhp, int *fhsizep,
struct nfs_args *args,
struct proc *procp));
static int setfs __P((struct sockaddr_in *addr, char *path, char *p));
static int getdec __P((char **ptr));
static char *substr __P((char *a,char *b));
static void mountopts __P((struct nfs_args *args, char *p));
static int xdr_opaque_decode __P((struct mbuf **ptr,u_char *buf,
int len));
static int xdr_int_decode __P((struct mbuf **ptr,int *iptr));
static void printip __P((char *prefix,struct in_addr addr));
#ifdef BOOTP_DEBUG
void bootpboot_p_sa(struct sockaddr *sa,struct sockaddr *ma);
void bootpboot_p_ma(struct sockaddr *ma);
void bootpboot_p_rtentry(struct rtentry *rt);
void bootpboot_p_tree(struct radix_node *rn);
void bootpboot_p_rtlist(void);
void bootpboot_p_iflist(void);
#endif
static int bootpc_call(struct bootp_packet *call,
struct bootp_packet *reply,
struct proc *procp);
static int bootpc_fakeup_interface(struct ifreq *ireq,
struct socket *so,
struct proc *procp);
static int
bootpc_adjust_interface(struct ifreq *ireq,struct socket *so,
struct sockaddr_in *myaddr,
struct sockaddr_in *netmask,
struct sockaddr_in *gw,
struct proc *procp);
void bootpc_init(void);
#ifdef BOOTP_DEBUG
void bootpboot_p_sa(sa,ma)
struct sockaddr *sa;
struct sockaddr *ma;
{
if (!sa) {
printf("(sockaddr *) <null>");
return;
}
switch (sa->sa_family) {
case AF_INET:
{
struct sockaddr_in *sin = (struct sockaddr_in *) sa;
printf("inet %x",ntohl(sin->sin_addr.s_addr));
if (ma) {
struct sockaddr_in *sin = (struct sockaddr_in *) ma;
printf(" mask %x",ntohl(sin->sin_addr.s_addr));
}
}
break;
case AF_LINK:
{
struct sockaddr_dl *sli = (struct sockaddr_dl *) sa;
int i;
printf("link %.*s ",sli->sdl_nlen,sli->sdl_data);
for (i=0;i<sli->sdl_alen;i++) {
if (i>0)
printf(":");
printf("%x",(unsigned char) sli->sdl_data[i+sli->sdl_nlen]);
}
}
break;
default:
printf("af%d",sa->sa_family);
}
}
void bootpboot_p_ma(ma)
struct sockaddr *ma;
{
if (!ma) {
printf("<null>");
return;
}
printf("%x",*(int*)ma);
}
void bootpboot_p_rtentry(rt)
struct rtentry *rt;
{
bootpboot_p_sa(rt_key(rt),rt_mask(rt));
printf(" ");
bootpboot_p_ma(rt->rt_genmask);
printf(" ");
bootpboot_p_sa(rt->rt_gateway,NULL);
printf(" ");
printf("flags %x",(unsigned short) rt->rt_flags);
printf(" %d",rt->rt_rmx.rmx_expire);
printf(" %s%d\n",rt->rt_ifp->if_name,rt->rt_ifp->if_unit);
}
void bootpboot_p_tree(rn)
struct radix_node *rn;
{
while (rn) {
if (rn->rn_b < 0) {
if (rn->rn_flags & RNF_ROOT) {
} else {
bootpboot_p_rtentry((struct rtentry *) rn);
}
rn = rn->rn_dupedkey;
} else {
bootpboot_p_tree(rn->rn_l);
bootpboot_p_tree(rn->rn_r);
return;
}
}
}
void bootpboot_p_rtlist(void)
{
printf("Routing table:\n");
bootpboot_p_tree(rt_tables[AF_INET]->rnh_treetop);
}
void bootpboot_p_iflist(void)
{
struct ifnet *ifp;
struct ifaddr *ifa;
printf("Interface list:\n");
for (ifp = TAILQ_FIRST(&ifnet); ifp != 0; ifp = TAILQ_NEXT(ifp,if_link))
{
for (ifa = TAILQ_FIRST(&ifp->if_addrhead) ;ifa;
ifa=TAILQ_NEXT(ifa,ifa_link))
if (ifa->ifa_addr->sa_family == AF_INET ) {
printf("%s%d flags %x, addr %x, bcast %x, net %x\n",
ifp->if_name,ifp->if_unit,
(unsigned short) ifp->if_flags,
ntohl(((struct sockaddr_in *) ifa->ifa_addr)->sin_addr.s_addr),
ntohl(((struct sockaddr_in *) ifa->ifa_dstaddr)->sin_addr.s_addr),
ntohl(((struct sockaddr_in *) ifa->ifa_netmask)->sin_addr.s_addr)
);
}
}
}
#endif
static int
bootpc_call(call,reply,procp)
struct bootp_packet *call;
struct bootp_packet *reply; /* output */
struct proc *procp;
{
struct socket *so;
struct sockaddr_in *sin, sa;
struct uio auio;
struct sockopt sopt;
struct iovec aio;
struct timeval tv;
int error, on, len, rcvflg, secs, timo;
/*
* Create socket and set its recieve timeout.
*/
if ((error = socreate(AF_INET, &so, SOCK_DGRAM, 0,procp)))
goto out;
tv.tv_sec = 1;
tv.tv_usec = 0;
bzero(&sopt, sizeof sopt);
sopt.sopt_level = SOL_SOCKET;
sopt.sopt_name = SO_RCVTIMEO;
sopt.sopt_val = &tv;
sopt.sopt_valsize = sizeof tv;
if ((error = sosetopt(so, &sopt)) != 0)
goto out;
/*
* Enable broadcast.
*/
on = 1;
sopt.sopt_val = &on;
sopt.sopt_valsize = sizeof on;
sopt.sopt_name = SO_BROADCAST;
if ((error = sosetopt(so, &sopt)) != 0)
goto out;
/*
* Bind the local endpoint to a bootp client port.
*/
sin = &sa;
bzero(sin, sizeof *sin);
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = INADDR_ANY;
sin->sin_port = htons(IPPORT_BOOTPC);
error = sobind(so, (struct sockaddr *)sin, procp);
if (error) {
printf("bind failed\n");
goto out;
}
/*
* Setup socket address for the server.
*/
sin = &sa;
bzero(sin, sizeof *sin);
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
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;
for (;;) {
/* Send BOOTP request (or re-send). */
aio.iov_base = (caddr_t) call;
aio.iov_len = sizeof(*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(*call);
auio.uio_procp = procp;
error = sosend(so, (struct sockaddr *)sin, &auio, NULL,
NULL, 0, procp);
if (error) {
printf("bootpc_call: sosend: %d state %08x\n", error, (int)so->so_state);
goto out;
}
/* Determine new timeout. */
if (timo < MAX_RESEND_DELAY)
timo++;
else
printf("BOOTP timeout for server 0x%lx\n",
(u_long)ntohl(sin->sin_addr.s_addr));
/*
* Wait for up to timo seconds for a reply.
* The socket receive timeout was set to 1 second.
*/
secs = timo;
while (secs > 0) {
aio.iov_base = (caddr_t) reply;
aio.iov_len = sizeof(*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(*reply);
auio.uio_procp = procp;
rcvflg = 0;
error = soreceive(so, NULL, &auio, NULL, NULL, &rcvflg);
if (error == EWOULDBLOCK) {
secs--;
call->secs=htons(ntohs(call->secs)+1);
continue;
}
if (error)
goto out;
len = sizeof(*reply) - auio.uio_resid;
/* Do we have the required number of bytes ? */
if (len < BOOTP_MIN_LEN)
continue;
/* Is it the right reply? */
if (reply->op != 2)
continue;
if (reply->xid != call->xid)
continue;
if (reply->hlen != call->hlen)
continue;
if (bcmp(reply->chaddr,call->chaddr,call->hlen))
continue;
goto gotreply; /* break two levels */
} /* while secs */
} /* forever send/receive */
error = ETIMEDOUT;
goto out;
gotreply:
out:
soclose(so);
return error;
}
static int
bootpc_fakeup_interface(struct ifreq *ireq,struct socket *so,
struct proc *procp)
{
struct sockaddr_in *sin;
int error;
struct sockaddr_in dst;
struct sockaddr_in gw;
struct sockaddr_in mask;
/*
* 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, procp);
if (error)
panic("bootpc_fakeup_interface: GIFFLAGS, error=%d", error);
ireq->ifr_flags |= IFF_UP;
error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, procp);
if (error)
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;
bzero((caddr_t)sin, sizeof(*sin));
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = INADDR_ANY;
error = ifioctl(so, SIOCSIFADDR, (caddr_t)ireq, procp);
if (error)
panic("bootpc_fakeup_interface: set if addr, error=%d", error);
/* netmask is 0.0.0.0 */
sin = (struct sockaddr_in *)&ireq->ifr_addr;
bzero((caddr_t)sin, sizeof(*sin));
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = INADDR_ANY;
error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)ireq, procp);
if (error)
panic("bootpc_fakeup_interface: set if net addr, error=%d", error);
/* Broadcast is 255.255.255.255 */
sin = (struct sockaddr_in *)&ireq->ifr_addr;
bzero((caddr_t)sin, sizeof(*sin));
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = INADDR_BROADCAST;
error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, procp);
if (error)
panic("bootpc_fakeup_interface: set if broadcast addr, error=%d", error);
/* Add default route to 0.0.0.0 so we can send data */
bzero((caddr_t) &dst, sizeof(dst));
dst.sin_len=sizeof(dst);
dst.sin_family=AF_INET;
dst.sin_addr.s_addr = htonl(0);
bzero((caddr_t) &gw, sizeof(gw));
gw.sin_len=sizeof(gw);
gw.sin_family=AF_INET;
gw.sin_addr.s_addr = htonl(0x0);
bzero((caddr_t) &mask, sizeof(mask));
mask.sin_len=sizeof(mask);
mask.sin_family=AF_INET;
mask.sin_addr.s_addr = htonl(0);
error = rtrequest(RTM_ADD,
(struct sockaddr *) &dst,
(struct sockaddr *) &gw,
(struct sockaddr *) &mask,
RTF_UP | RTF_STATIC
, NULL);
if (error)
printf("bootpc_fakeup_interface: add default route, error=%d\n", error);
return error;
}
static int
bootpc_adjust_interface(struct ifreq *ireq,struct socket *so,
struct sockaddr_in *myaddr,
struct sockaddr_in *netmask,
struct sockaddr_in *gw,
struct proc *procp)
{
int error;
struct sockaddr_in oldgw;
struct sockaddr_in olddst;
struct sockaddr_in oldmask;
struct sockaddr_in *sin;
/* Remove old default route to 0.0.0.0 */
bzero((caddr_t) &olddst, sizeof(olddst));
olddst.sin_len=sizeof(olddst);
olddst.sin_family=AF_INET;
olddst.sin_addr.s_addr = INADDR_ANY;
bzero((caddr_t) &oldgw, sizeof(oldgw));
oldgw.sin_len=sizeof(oldgw);
oldgw.sin_family=AF_INET;
oldgw.sin_addr.s_addr = INADDR_ANY;
bzero((caddr_t) &oldmask, sizeof(oldmask));
oldmask.sin_len=sizeof(oldmask);
oldmask.sin_family=AF_INET;
oldmask.sin_addr.s_addr = INADDR_ANY;
error = rtrequest(RTM_DELETE,
(struct sockaddr *) &olddst,
(struct sockaddr *) &oldgw,
(struct sockaddr *) &oldmask,
(RTF_UP | RTF_STATIC), NULL);
if (error) {
printf("nfs_boot: del default route, error=%d\n", error);
return error;
}
/*
* 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, procp);
if (error)
panic("nfs_boot: set if netmask, error=%d", error);
/* Broadcast is with host part of IP address all 1's */
sin = (struct sockaddr_in *)&ireq->ifr_addr;
bzero((caddr_t)sin, sizeof(*sin));
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = myaddr->sin_addr.s_addr | ~ netmask->sin_addr.s_addr;
error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, procp);
if (error)
panic("bootpc_call: set if broadcast addr, error=%d", error);
bcopy(myaddr,&ireq->ifr_addr,sizeof(*myaddr));
error = ifioctl(so, SIOCSIFADDR, (caddr_t)ireq, procp);
if (error)
panic("nfs_boot: set if addr, error=%d", error);
/* Add new default route */
error = rtrequest(RTM_ADD,
(struct sockaddr *) &olddst,
(struct sockaddr *) gw,
(struct sockaddr *) &oldmask,
(RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL);
if (error) {
printf("nfs_boot: add net route, error=%d\n", error);
return error;
}
return 0;
}
static int setfs(addr, path, p)
struct sockaddr_in *addr;
char *path;
char *p;
{
unsigned ip = 0;
int val;
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;
if (*p != ':') return(0);
p++;
addr->sin_addr.s_addr = htonl(ip);
addr->sin_len = sizeof(struct sockaddr_in);
addr->sin_family = AF_INET;
strncpy(path,p,MNAMELEN-1);
return(1);
}
static int getdec(ptr)
char **ptr;
{
char *p = *ptr;
int 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 char *substr(a,b)
char *a,*b;
{
char *loc1;
char *loc2;
while (*a != '\0') {
loc1 = a;
loc2 = b;
while (*loc1 == *loc2++) {
if (*loc1 == '\0') return (0);
loc1++;
if (*loc2 == '\0') return (loc1);
}
a++;
}
return (0);
}
static void mountopts(args,p)
struct nfs_args *args;
char *p;
{
char *tmp;
args->flags = NFSMNT_RSIZE | NFSMNT_WSIZE | NFSMNT_RESVPORT;
args->sotype = SOCK_DGRAM;
if ((tmp = (char *)substr(p,"rsize=")))
args->rsize=getdec(&tmp);
if ((tmp = (char *)substr(p,"wsize=")))
args->wsize=getdec(&tmp);
if ((tmp = (char *)substr(p,"intr")))
args->flags |= NFSMNT_INT;
if ((tmp = (char *)substr(p,"soft")))
args->flags |= NFSMNT_SOFT;
if ((tmp = (char *)substr(p,"noconn")))
args->flags |= NFSMNT_NOCONN;
if ((tmp = (char *)substr(p, "tcp")))
args->sotype = SOCK_STREAM;
}
static int xdr_opaque_decode(mptr,buf,len)
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(mptr,iptr)
struct mbuf **mptr;
int *iptr;
{
u_int32_t i;
if (xdr_opaque_decode(mptr,(u_char *) &i,sizeof(u_int32_t)))
return EBADRPC;
*iptr = fxdr_unsigned(u_int32_t,i);
return 0;
}
static void printip(char *prefix,struct in_addr addr)
{
unsigned int ip;
ip = ntohl(addr.s_addr);
printf("%s is %d.%d.%d.%d\n",prefix,
ip >> 24, (ip >> 16) & 255 ,(ip >> 8) & 255 ,ip & 255 );
}
void
bootpc_init(void)
{
struct bootp_packet call;
struct bootp_packet reply;
static u_int32_t xid = ~0xFF;
struct ifreq ireq;
struct ifnet *ifp;
struct socket *so;
int error;
int code,ncode,len;
int j;
char *p;
unsigned int ip;
struct sockaddr_in myaddr;
struct sockaddr_in netmask;
struct sockaddr_in gw;
int gotgw=0;
int gotnetmask=0;
int gotrootpath=0;
int gotswappath=0;
char lookup_path[24];
#define EALEN 6
struct ifaddr *ifa;
struct sockaddr_dl *sdl = NULL;
char *delim;
struct nfsv3_diskless *nd = &nfsv3_diskless;
struct proc *procp = curproc;
/*
* If already filled in, don't touch it here
*/
if (nfs_diskless_valid)
return;
/*
* Wait until arp entries can be handled.
*/
while (time_second == 0)
tsleep(&time_second, PZERO+8, "arpkludge", 10);
/*
* Find a network interface.
*/
#ifdef BOOTP_WIRED_TO
printf("bootpc_init: wired to interface '%s'\n",
__XSTRING(BOOTP_WIRED_TO));
#endif
bzero(&ireq, sizeof(ireq));
for (ifp = TAILQ_FIRST(&ifnet); ifp != 0; ifp = TAILQ_NEXT(ifp,if_link))
{
snprintf(ireq.ifr_name, sizeof(ireq.ifr_name),
"%s%d", ifp->if_name, ifp->if_unit);
#ifdef BOOTP_WIRED_TO
if (strcmp(ireq.ifr_name, __XSTRING(BOOTP_WIRED_TO)) == 0)
break;
#else
if ((ifp->if_flags &
(IFF_LOOPBACK|IFF_POINTOPOINT)) == 0)
break;
#endif
}
if (ifp == NULL)
panic("bootpc_init: no suitable interface");
strcpy(nd->myif.ifra_name,ireq.ifr_name);
printf("bootpc_init: using network interface '%s'\n",
ireq.ifr_name);
if ((error = socreate(AF_INET, &so, SOCK_DGRAM, 0,procp)) != 0)
panic("nfs_boot: socreate, error=%d", error);
bootpc_fakeup_interface(&ireq,so,procp);
printf("Bootpc testing starting\n");
/* Get HW address */
for (ifa = TAILQ_FIRST(&ifp->if_addrhead) ;ifa;
ifa=TAILQ_NEXT(ifa,ifa_link))
if (ifa->ifa_addr->sa_family == AF_LINK &&
(sdl = ((struct sockaddr_dl *) ifa->ifa_addr)) &&
sdl->sdl_type == IFT_ETHER)
break;
if (!sdl)
panic("bootpc: Unable to find HW address");
if (sdl->sdl_alen != EALEN )
panic("bootpc: HW address len is %d, expected value is %d",
sdl->sdl_alen,EALEN);
printf("bootpc hw address is ");
delim="";
for (j=0;j<sdl->sdl_alen;j++) {
printf("%s%x",delim,((unsigned char *)LLADDR(sdl))[j]);
delim=":";
}
printf("\n");
#if 0
bootpboot_p_iflist();
bootpboot_p_rtlist();
#endif
bzero((caddr_t) &call, sizeof(call));
/* bootpc part */
call.op = 1; /* BOOTREQUEST */
call.htype= 1; /* 10mb ethernet */
call.hlen=sdl->sdl_alen; /* Hardware address length */
call.hops=0;
xid++;
call.xid = txdr_unsigned(xid);
bcopy(LLADDR(sdl),&call.chaddr,sdl->sdl_alen);
j = 0;
call.vend[j++]=99;
call.vend[j++]=130;
call.vend[j++]=83;
call.vend[j++]=99;
/*
* We send an RFC 1533 "Maximum DHCP Message Size" option, saying we
* can do 1200 bytes. If we don't ISC DHCPD will limit the answer to
* 64 bytes and root/swap and similar will be dropped.
*/
call.vend[j++]=57;
call.vend[j++]=2;
call.vend[j++]=(1200) % 256;
call.vend[j++]=(1200) / 256;
call.vend[j++]=255;
call.secs = 0;
call.flags = htons(0x8000); /* We need an broadcast answer */
error = bootpc_call(&call,&reply,procp);
if (error) {
#ifdef BOOTP_NFSROOT
panic("BOOTP call failed");
#endif
return;
}
bzero(&myaddr,sizeof(myaddr));
bzero(&netmask,sizeof(netmask));
bzero(&gw,sizeof(gw));
myaddr.sin_len = sizeof(myaddr);
myaddr.sin_family = AF_INET;
netmask.sin_len = sizeof(netmask);
netmask.sin_family = AF_INET;
gw.sin_len = sizeof(gw);
gw.sin_family= AF_INET;
nd->root_args.version = NFS_ARGSVERSION;
nd->root_args.rsize = 8192;
nd->root_args.wsize = 8192;
nd->root_args.sotype = SOCK_DGRAM;
nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
nd->swap_saddr.sin_len = sizeof(gw);
nd->swap_saddr.sin_family = AF_INET;
nd->swap_args.version = NFS_ARGSVERSION;
nd->swap_args.rsize = 8192;
nd->swap_args.wsize = 8192;
nd->swap_args.sotype = SOCK_DGRAM;
nd->swap_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
myaddr.sin_addr = reply.yiaddr;
ip = ntohl(myaddr.sin_addr.s_addr);
snprintf(lookup_path, sizeof(lookup_path), "swap.%d.%d.%d.%d",
ip >> 24, (ip >> 16) & 255 ,(ip >> 8) & 255 ,ip & 255 );
printip("My ip address",myaddr.sin_addr);
printip("Server ip address",reply.siaddr);
gw.sin_addr = reply.giaddr;
printip("Gateway ip address",reply.giaddr);
if (reply.sname[0])
printf("Server name is %s\n",reply.sname);
if (reply.file[0])
printf("boot file is %s\n",reply.file);
if (reply.vend[0]==99 && reply.vend[1]==130 &&
reply.vend[2]==83 && reply.vend[3]==99) {
j=4;
ncode = reply.vend[j];
while (j<sizeof(reply.vend)) {
code = reply.vend[j] = ncode;
if (code==255)
break;
if (code==0) {
j++;
continue;
}
len = reply.vend[j+1];
j+=2;
if (len+j>=sizeof(reply.vend)) {
printf("Truncated field");
break;
}
ncode = reply.vend[j+len];
reply.vend[j+len]='\0';
p = &reply.vend[j];
switch (code) {
case 1:
if (len!=4)
panic("bootpc: subnet mask len is %d",len);
bcopy(&reply.vend[j],&netmask.sin_addr,4);
gotnetmask=1;
printip("Subnet mask",netmask.sin_addr);
break;
case 6: /* Domain Name servers. Unused */
case 16: /* Swap server IP address. unused */
case 2:
/* Time offset */
break;
case 3:
/* Routers */
if (len % 4)
panic("bootpc: Router Len is %d",len);
if (len > 0) {
bcopy(&reply.vend[j],&gw.sin_addr,4);
printip("Router",gw.sin_addr);
gotgw=1;
}
break;
case 17:
if (setfs(&nd->root_saddr, nd->root_hostnam, p)) {
printf("rootfs is %s\n",p);
gotrootpath=1;
} else
panic("Failed to set rootfs to %s",p);
break;
case 12:
if (len>=MAXHOSTNAMELEN)
panic("bootpc: hostname >=%d bytes",MAXHOSTNAMELEN);
strncpy(nd->my_hostnam,&reply.vend[j],len);
nd->my_hostnam[len]=0;
strncpy(hostname,&reply.vend[j],len);
hostname[len]=0;
printf("Hostname is %s\n",hostname);
break;
case 128:
if (setfs(&nd->swap_saddr, nd->swap_hostnam, p)) {
gotswappath=1;
printf("swapfs is %s\n",p);
} else
panic("Failed to set swapfs to %s",p);
break;
case 129:
{
int swaplen;
if (len!=4)
panic("bootpc: Expected 4 bytes for swaplen, not %d bytes",len);
bcopy(&reply.vend[j],&swaplen,4);
nd->swap_nblks = ntohl(swaplen);
printf("bootpc: Swap size is %d KB\n",nd->swap_nblks);
}
break;
case 130: /* root mount options */
mountopts(&nd->root_args,p);
break;
case 131: /* swap mount options */
mountopts(&nd->swap_args,p);
break;
default:
printf("Ignoring field type %d\n",code);
}
j+=len;
}
}
if (!gotswappath)
nd->swap_nblks = 0;
#ifdef BOOTP_NFSROOT
if (!gotrootpath)
panic("bootpc: No root path offered");
#endif
if (!gotnetmask) {
if (IN_CLASSA(ntohl(myaddr.sin_addr.s_addr)))
netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
else if (IN_CLASSB(ntohl(myaddr.sin_addr.s_addr)))
netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
else
netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
}
if (!gotgw) {
/* Use proxyarp */
gw.sin_addr.s_addr = myaddr.sin_addr.s_addr;
}
#if 0
bootpboot_p_iflist();
bootpboot_p_rtlist();
#endif
error = bootpc_adjust_interface(&ireq,so,
&myaddr,&netmask,&gw,procp);
soclose(so);
#if 0
bootpboot_p_iflist();
bootpboot_p_rtlist();
#endif
if (gotrootpath) {
error = md_mount(&nd->root_saddr, nd->root_hostnam,
nd->root_fh, &nd->root_fhsize,
&nd->root_args,procp);
if (error)
panic("nfs_boot: mountd root, error=%d", error);
if (gotswappath) {
error = md_mount(&nd->swap_saddr,
nd->swap_hostnam,
nd->swap_fh, &nd->swap_fhsize,&nd->swap_args,procp);
if (error)
panic("nfs_boot: mountd swap, error=%d", error);
error = md_lookup_swap(&nd->swap_saddr,lookup_path,nd->swap_fh,
&nd->swap_fhsize, &nd->swap_args,procp);
if (error)
panic("nfs_boot: lookup swap, error=%d", error);
}
nfs_diskless_valid = 3;
}
bcopy(&myaddr,&nd->myif.ifra_addr,sizeof(myaddr));
bcopy(&myaddr,&nd->myif.ifra_broadaddr,sizeof(myaddr));
((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
bcopy(&netmask,&nd->myif.ifra_mask,sizeof(netmask));
#if 0
bootpboot_p_iflist();
bootpboot_p_rtlist();
#endif
return;
}
/*
* 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(mdsin, path, fhp, fhsizep, args, procp)
struct sockaddr_in *mdsin; /* mountd server address */
char *path;
u_char *fhp;
int *fhsizep;
struct nfs_args *args;
struct proc *procp;
{
struct mbuf *m;
int error;
int authunixok;
int authcount;
int authver;
#ifdef BOOTP_NFSV3
/* First try NFS v3 */
/* Get port number for MOUNTD. */
error = krpc_portmap(mdsin, RPCPROG_MNT, RPCMNT_VER3,
&mdsin->sin_port, procp);
if (!error) {
m = xdr_string_encode(path, strlen(path));
/* Do RPC to mountd. */
error = krpc_call(mdsin, RPCPROG_MNT, RPCMNT_VER3,
RPCMNT_MOUNT, &m, NULL, curproc);
}
if (!error) {
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, procp);
if (error) 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, curproc);
if (error)
return error; /* message already freed */
#ifdef BOOTP_NFSV3
}
#endif
if (xdr_int_decode(&m,&error) || error)
goto bad;
if (args->flags & NFSMNT_NFSV3) {
if (xdr_int_decode(&m,fhsizep) ||
*fhsizep > NFSX_V3FHMAX || *fhsizep <= 0 )
goto bad;
} else
*fhsizep = NFSX_V2FH;
if (xdr_opaque_decode(&m,fhp,*fhsizep))
goto bad;
if (args->flags & NFSMNT_NFSV3) {
if (xdr_int_decode(&m,&authcount))
goto bad;
authunixok = 0;
if (authcount<0 || authcount>100)
goto bad;
while (authcount>0) {
if (xdr_int_decode(&m,&authver))
goto bad;
if (authver == RPCAUTH_UNIX)
authunixok = 1;
authcount--;
}
if (!authunixok)
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, procp);
goto out;
bad:
error = EBADRPC;
out:
m_freem(m);
return error;
}
static int md_lookup_swap(mdsin, path, fhp, fhsizep, args, procp)
struct sockaddr_in *mdsin; /* mountd server address */
char *path;
u_char *fhp;
int *fhsizep;
struct nfs_args *args;
struct proc *procp;
{
struct mbuf *m;
int error;
int size = -1;
int attribs_present;
int status;
union {
u_int32_t v2[17];
u_int32_t v3[21];
} fattribs;
m = m_get(M_WAIT,MT_DATA);
if (!m)
return ENOBUFS;
if (args->flags & NFSMNT_NFSV3) {
*mtod(m,u_int32_t *) = txdr_unsigned(*fhsizep);
bcopy(fhp,mtod(m,u_char *)+sizeof(u_int32_t),*fhsizep);
m->m_len = *fhsizep + sizeof(u_int32_t);
} else {
bcopy(fhp,mtod(m,u_char *),NFSX_V2FH);
m->m_len = NFSX_V2FH;
}
m->m_next = xdr_string_encode(path, strlen(path));
if (!m->m_next) {
error = ENOBUFS;
goto out;
}
/* Do RPC to nfsd. */
if (args->flags & NFSMNT_NFSV3)
error = krpc_call(mdsin, NFS_PROG, NFS_VER3,
NFSPROC_LOOKUP, &m, NULL, procp);
else
error = krpc_call(mdsin, NFS_PROG, NFS_VER2,
NFSV2PROC_LOOKUP, &m, NULL, procp);
if (error)
return error; /* message already freed */
if (xdr_int_decode(&m,&status))
goto bad;
if (status) {
error = ENOENT;
goto out;
}
if (args->flags & NFSMNT_NFSV3) {
if (xdr_int_decode(&m,fhsizep) ||
*fhsizep > NFSX_V3FHMAX || *fhsizep <= 0 )
goto bad;
} else
*fhsizep = NFSX_V2FH;
if (xdr_opaque_decode(&m, fhp, *fhsizep))
goto bad;
if (args->flags & NFSMNT_NFSV3) {
if (xdr_int_decode(&m,&attribs_present))
goto bad;
if (attribs_present) {
if (xdr_opaque_decode(&m,(u_char *) &fattribs.v3,
sizeof(u_int32_t)*21))
goto bad;
size = fxdr_unsigned(u_int32_t, fattribs.v3[6]);
}
} else {
if (xdr_opaque_decode(&m,(u_char *) &fattribs.v2,
sizeof(u_int32_t)*17))
goto bad;
size = fxdr_unsigned(u_int32_t, fattribs.v2[5]);
}
if (!nfsv3_diskless.swap_nblks && size!= -1) {
nfsv3_diskless.swap_nblks = size/1024;
printf("md_lookup_swap: Swap size is %d KB\n",
nfsv3_diskless.swap_nblks);
}
goto out;
bad:
error = EBADRPC;
out:
m_freem(m);
return error;
}
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