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432aad0e98
freebsd-dev/sys/nfs/bootp_subr.c
Tor Egge 432aad0e98 Bring in some kernel bootp support. This removes the need for netboot 
to fill in the nfs_diskless structure, at the cost of some kernel
bloat. The advantage is that this code works on a wider range of
network adapters than netboot. Several new kernel options are
documented in LINT.
Obtained from: parts of the code comes from NetBSD.
1997-05-11 18:05:39 +00:00

1320 lines
32 KiB
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Raw Blame History

/* $Id:$ */
/*
* 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/sockio.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/mbuf.h>
#include <sys/reboot.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <netinet/if_ether.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 MIN_REPLY_HDR 16 /* xid, dir, astat, errno */
/*
* 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));
#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
int bootpc_call(struct bootp_packet *call,
struct bootp_packet *reply,
struct proc *procp);
int bootpc_fakeup_interface(struct ifreq *ireq,struct socket *so,
struct proc *procp);
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
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 mbuf *m, *nam;
struct uio auio;
struct iovec aio;
int error, rcvflg, timo, secs, len;
u_int tport;
/* Free at end if not null. */
nam = NULL;
/*
* Create socket and set its recieve timeout.
*/
if ((error = socreate(AF_INET, &so, SOCK_DGRAM, 0,procp)))
goto out;
m = m_get(M_WAIT, MT_SOOPTS);
if (m == NULL) {
error = ENOBUFS;
goto out;
} else {
struct timeval *tv;
tv = mtod(m, struct timeval *);
m->m_len = sizeof(*tv);
tv->tv_sec = 1;
tv->tv_usec = 0;
if ((error = sosetopt(so, SOL_SOCKET, SO_RCVTIMEO, m, procp)))
goto out;
}
/*
* Enable broadcast.
*/
{
int *on;
m = m_get(M_WAIT, MT_SOOPTS);
if (m == NULL) {
error = ENOBUFS;
goto out;
}
on = mtod(m, int *);
m->m_len = sizeof(*on);
*on = 1;
if ((error = sosetopt(so, SOL_SOCKET, SO_BROADCAST, m, procp)))
goto out;
}
/*
* Bind the local endpoint to a bootp client port.
*/
m = m_getclr(M_WAIT, MT_SONAME);
sin = mtod(m, struct sockaddr_in *);
sin->sin_len = m->m_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = INADDR_ANY;
sin->sin_port = htons(IPPORT_BOOTPC);
error = sobind(so, m, procp);
m_freem(m);
if (error) {
printf("bind failed\n");
goto out;
}
/*
* Setup socket address for the server.
*/
nam = m_get(M_WAIT, MT_SONAME);
if (nam == NULL) {
error = ENOBUFS;
goto out;
}
sin = mtod(nam, struct sockaddr_in *);
sin-> sin_len = sizeof(*sin);
sin-> sin_family = AF_INET;
sin->sin_addr.s_addr = INADDR_BROADCAST;
sin->sin_port = htons(IPPORT_BOOTPS);
nam->m_len = sizeof(*sin);
/*
* 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, nam, &auio, NULL, NULL, 0);
if (error) {
printf("bootpc_call: sosend: %d\n", error);
goto out;
}
/* Determine new timeout. */
if (timo < MAX_RESEND_DELAY)
timo++;
else
printf("BOOTP timeout for server 0x%x\n",
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;
/* Does the reply contain at least a header? */
if (len < MIN_REPLY_HDR)
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:
if (nam) m_freem(nam);
soclose(so);
return error;
}
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;
}
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;
}
#if 0
olddst.sin_addr.s_addr = INADDR_BROADCAST;
error = rtrequest(RTM_DELETE,
(struct sockaddr *) &olddst,
(struct sockaddr *) &oldgw,
(struct sockaddr *) NULL,
(RTF_UP | RTF_HOST | RTF_STATIC), NULL);
if (error) {
printf("nfs_boot: del broadcast route, error=%d\n", error);
}
#endif
/*
* 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;
}
#if 0
/* Remove default gateway arp entry. This is a kludge, but
somehow the arp entry is added without an arp request
being sent, causing outgoing packets to be dropped onto the floor */
error = rtrequest(RTM_DELETE,
(struct sockaddr *) gw,
(struct sockaddr *) NULL,
(struct sockaddr *) NULL,
(RTF_UP | RTF_HOST | RTF_STATIC), NULL);
if (error) {
printf("nfs_boot: del default gateway linklevel route, error=%d\n", error);
}
#endif
return 0;
}
void bootp_expand_path(char *str,size_t len,char *hostname,
struct in_addr addr);
void bootp_expand_path(char *str,size_t len,char *hostname,
struct in_addr addr)
{
char tmpbuf[128];
char tmpaddr[20];
char *p,*q,*savep;
q = tmpbuf;
savep = NULL;
sprintf(tmpaddr,"%d.%d.%d.%d",
((unsigned char *) &addr)[0],
((unsigned char *) &addr)[1],
((unsigned char *) &addr)[2],
((unsigned char *) &addr)[3]);
for (p=str;*p;) {
switch(*p) {
case '%':
if (!savep) {
switch(*++p) {
case 'H':
savep = ++p;
p= hostname;
break;
case 'I':
savep = ++p;
p = tmpaddr;
break;
default:
goto arnej;
}
break;
}
default:
arnej:
if (q+1>=tmpbuf+sizeof(tmpbuf))
panic("bootp_expand_path: Cannot expand %s\n",str);
else
*q++ = *p++;
if (!*p && savep) {
p = savep;
savep = NULL;
}
}
}
*q++ = 0;
if (q-tmpbuf>len) {
panic("bootp_expand_path: Too long expansion: %s\n",tmpbuf);
}
strcpy(str,tmpbuf);
}
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,len;
int i,j;
char rootpath[65];
char swappath[65];
struct sockaddr_in myaddr;
struct sockaddr_in netmask;
struct sockaddr_in gw;
struct sockaddr_in server;
int gotgw=0;
int gotnetmask=0;
int gotserver=0;
int gotrootpath=0;
int gotswappath=0;
#define EALEN 6
unsigned char ea[EALEN];
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;
/*
* Bump time if 0.
*/
if (!time.tv_sec)
time.tv_sec++;
/*
* Find a network interface.
*/
for (ifp = TAILQ_FIRST(&ifnet); ifp != 0; ifp = TAILQ_NEXT(ifp,if_link))
if ((ifp->if_flags &
(IFF_LOOPBACK|IFF_POINTOPOINT)) == 0)
break;
if (ifp == NULL)
panic("bootpc_init: no suitable interface");
bzero(&ireq,sizeof(ireq));
sprintf(ireq.ifr_name, "%s%d", ifp->if_name,ifp->if_unit);
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);
#if 1
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");
#endif
#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);
call.vend[0]=99;
call.vend[1]=130;
call.vend[2]=83;
call.vend[3]=99;
call.vend[4]=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));
bzero(&server,sizeof(server));
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;
server.sin_len = sizeof(gw);
server.sin_family= AF_INET;
printf("My new ip address is %x\n",htonl(reply.yiaddr.s_addr));
myaddr.sin_addr = reply.yiaddr;
printf("Server ip address is %x\n",htonl(reply.siaddr.s_addr));
printf("Gateway ip address is %x\n",htonl(reply.giaddr.s_addr));
gw.sin_addr = 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;
while (j<sizeof(reply.vend)) {
code = reply.vend[j];
if (reply.vend[j]==255)
break;
if (reply.vend[j]==0) {
j++;
continue;
}
len = reply.vend[j+1];
j+=2;
if (len+j>=sizeof(reply.vend)) {
printf("Truncated field");
break;
}
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;
printf("Subnet mask is %d.%d.%d.%d\n",
reply.vend[j],
reply.vend[j+1],
reply.vend[j+2],
reply.vend[j+3]);
break;
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);
gotgw=1;
}
for (i=0;i<len;i+=4) {
printf("Router is %d.%d.%d.%d\n",
reply.vend[j+i],
reply.vend[j+i+1],
reply.vend[j+i+2],
reply.vend[j+i+3]);
}
break;
case 6:
/* Domain Name servers */
if (len % 4)
panic("bootpc: DNS Len is %d",len);
for (i=0;i<len;i+=4) {
printf("DNS server is %d.%d.%d.%d\n",
reply.vend[j+i],
reply.vend[j+i+1],
reply.vend[j+i+2],
reply.vend[j+i+3]);
}
break;
case 16:
if (len!=4)
panic("bootpc: swap server len is %d",len);
bcopy(&reply.vend[j],&server.sin_addr,4);
gotserver=1;
printf("Swap server (also used as root path server) is %d.%d.%d.%d\n",
reply.vend[j],
reply.vend[j+1],
reply.vend[j+2],
reply.vend[j+3]);
break;
case 17:
if (len>=sizeof(rootpath))
panic("bootpc: rootpath >=%d bytes",sizeof(rootpath));
strncpy(rootpath,&reply.vend[j],len);
rootpath[len]=0;
gotrootpath=1;
printf("Rootpath is %s\n",rootpath);
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 (len>=sizeof(swappath))
panic("bootpc: swappath >=%d bytes",sizeof(swappath));
strncpy(swappath,&reply.vend[j],len);
swappath[len]=0;
gotswappath=1;
printf("Swappath is %s\n",swappath);
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;
default:
printf("Ignoring field type %d\n",code);
}
j+=len;
}
}
if (gotrootpath) {
bootp_expand_path(rootpath,sizeof(rootpath),
hostname,
myaddr.sin_addr);
printf("Rootpath is expanded to %s\n",rootpath);
if (gotswappath) {
bootp_expand_path(swappath,sizeof(swappath),
hostname,
myaddr.sin_addr);
printf("Swappath is expanded to %s\n",swappath);
}
else
nd->swap_nblks = 0;
} else {
#ifdef BOOTP_NFSROOT
panic("bootpc: No root path offered");
#endif
}
if (!gotserver) {
server.sin_addr = reply.siaddr ;
}
if (!gotnetmask) {
if (IN_CLASSA(myaddr.sin_addr.s_addr))
netmask.sin_addr.s_addr = IN_CLASSA_NET;
else if (IN_CLASSB(myaddr.sin_addr.s_addr))
netmask.sin_addr.s_addr = IN_CLASSB_NET;
else
netmask.sin_addr.s_addr = 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
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 | NFSMNT_NOCONN);
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 | NFSMNT_NOCONN);
if (gotrootpath) {
if (server.sin_addr.s_addr != reply.siaddr.s_addr ) {
sprintf(nd->root_hostnam,"%d.%d.%d.%d",
((unsigned char *) &server.sin_addr)[0],
((unsigned char *) &server.sin_addr)[1],
((unsigned char *) &server.sin_addr)[2],
((unsigned char *) &server.sin_addr)[3]);
} else
strcpy(nd->root_hostnam,reply.sname);
bcopy(&server, &nd->root_saddr,sizeof(server));
error = md_mount(&nd->root_saddr, rootpath, nd->root_fh, &nd->root_fhsize,
&nd->root_args,procp);
if (error)
panic("nfs_boot: mountd root, error=%d", error);
if (gotswappath) {
char *p = swappath;
while (*p)
p++;
while (p>=swappath && *p != '/')
p--;
strcpy(nd->swap_hostnam, nd->root_hostnam);
bcopy(&server, &nd->swap_saddr,sizeof(server));
if (p>swappath)
*p = '\0';
error = md_mount(&nd->swap_saddr,
(p>swappath) ? swappath:"/",
nd->swap_fh, &nd->swap_fhsize,&nd->swap_args,procp);
if (error)
panic("nfs_boot: mountd swap, error=%d", error);
if (p>swappath)
*p = '/';
if (p>=swappath)
error = md_lookup_swap(&nd->swap_saddr,p+1,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 (m->m_len < sizeof(u_int32_t)) {
m = m_pullup(m, sizeof(u_int32_t));
if (m == NULL)
goto bad;
}
error = fxdr_unsigned(u_int32_t, *mtod(m,u_int32_t *));
if (error)
goto bad;
m_adj(m,sizeof(u_int32_t));
if (args->flags & NFSMNT_NFSV3) {
if (m->m_len < sizeof(u_int32_t)) {
m = m_pullup(m, sizeof(u_int32_t));
if (m == NULL)
goto bad;
}
*fhsizep = fxdr_unsigned(u_int32_t, *mtod(m,u_int32_t *));
if (*fhsizep > NFSX_V3FHMAX || *fhsizep <= 0 )
goto bad;
m_adj(m,sizeof(u_int32_t));
} else
*fhsizep = NFSX_V2FH;
if (m->m_len < (((*fhsizep)+3)&~3)) {
m = m_pullup(m,(((*fhsizep)+3)&~3));
if (m == NULL)
goto bad;
}
bcopy(mtod(m,u_char *), fhp, *fhsizep);
m_adj(m,(((*fhsizep)+3)&~3));
if (args->flags & NFSMNT_NFSV3) {
if (m->m_len < sizeof(u_int32_t)) {
m = m_pullup(m, sizeof(u_int32_t));
if (m == NULL)
goto bad;
}
authcount = fxdr_unsigned(u_int32_t, *mtod(m,u_int32_t *));
authunixok = 0;
m_adj(m,sizeof(u_int32_t));
if (authcount<0 || authcount>100)
goto bad;
while (authcount>0) {
if (m->m_len < sizeof(u_int32_t)) {
m = m_pullup(m, sizeof(u_int32_t));
if (m == NULL)
goto bad;
}
authver = fxdr_unsigned(u_int32_t, *mtod(m,u_int32_t *));
if (authver == RPCAUTH_UNIX)
authunixok = 1;
authcount--;
m_adj(m,sizeof(u_int32_t));
}
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;
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 (m->m_len < sizeof(u_int32_t)) {
m = m_pullup(m, sizeof(u_int32_t));
if (m == NULL)
goto bad;
}
status = fxdr_unsigned(u_int32_t, *mtod(m,u_int32_t *));
m_adj(m,sizeof(u_int32_t));
if (status) {
error = ENOENT;
goto out;
}
if (args->flags & NFSMNT_NFSV3) {
if (m->m_len < sizeof(u_int32_t)) {
m = m_pullup(m, sizeof(u_int32_t));
if (m == NULL)
goto bad;
}
*fhsizep = fxdr_unsigned(u_int32_t, *mtod(m,u_int32_t *));
if (*fhsizep > NFSX_V3FHMAX || *fhsizep <= 0 )
goto bad;
m_adj(m,sizeof(u_int32_t));
} else
*fhsizep = NFSX_V2FH;
if (m->m_len < (((*fhsizep)+3)&~3)) {
m = m_pullup(m,(((*fhsizep)+3)&~3));
if (m == NULL)
goto bad;
}
bcopy(mtod(m,u_char *), fhp, *fhsizep);
m_adj(m,(((*fhsizep)+3)&~3));
if (args->flags & NFSMNT_NFSV3) {
if (m->m_len < sizeof(u_int32_t)) {
m = m_pullup(m, sizeof(u_int32_t));
if (m == NULL)
goto bad;
}
attribs_present = fxdr_unsigned(u_int32_t, *mtod(m,u_int32_t *));
m_adj(m,sizeof(u_int32_t));
if (attribs_present) {
if (m->m_len < sizeof(u_int32_t)*21) {
m = m_pullup(m, sizeof(u_int32_t)*21);
if (m == NULL)
goto bad;
}
size = fxdr_unsigned(u_int32_t, mtod(m,u_int32_t *)[6]);
}
} else {
if (m->m_len < sizeof(u_int32_t)*17) {
m = m_pullup(m, sizeof(u_int32_t)*17);
if (m == NULL)
goto bad;
}
size = fxdr_unsigned(u_int32_t, mtod(m,u_int32_t *)[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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