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Circumvent the lack of a reliable gateway/netmask value in the 

Sun RPC bootparam/whoami return by requesting a "pseudo file"
named "gateway" and using its contents as the gateway:netmask
Example /etc/bootparams line: client gateway=router:0xfffffff0
This commit is contained in:
gwr 1997-09-09 21:36:35 +00:00
parent a6aa4731bc
commit d0a27c5bdd
1 changed files with 79 additions and 7 deletions
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86
sys/nfs/nfs_bootparam.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: nfs_bootparam.c,v 1.1 1997/08/29 16:07:46 gwr Exp $ */
/* $NetBSD: nfs_bootparam.c,v 1.2 1997/09/09 21:36:35 gwr Exp $ */
/*-
* Copyright (c) 1995, 1997 The NetBSD Foundation, Inc.
@ -106,12 +106,16 @@ nfs_bootparam(ifp, nd, procp)
struct proc *procp;
{
struct ifreq ireq;
struct in_addr my_ip, gw_ip;
struct sockaddr_in bp_sin;
struct sockaddr_in *sin;
struct socket *so;
struct in_addr my_ip;
struct nfs_dlmount *gw_ndm;
char *p;
u_int32_t mask, x;
int error;
gw_ndm = 0;
bzero(&ireq, sizeof(ireq));
bcopy(ifp->if_xname, ireq.ifr_name, IFNAMSIZ);
@ -161,7 +165,7 @@ nfs_bootparam(ifp, nd, procp)
sin = (struct sockaddr_in *)&ireq.ifr_addr;
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = my_ip.s_addr;
sin->sin_addr = my_ip;
error = ifioctl(so, SIOCSIFADDR, (caddr_t)&ireq, procp);
if (error) {
printf("nfs_boot: set ifaddr, error=%d\n", error);
@ -183,7 +187,7 @@ nfs_bootparam(ifp, nd, procp)
sin->sin_addr.s_addr = INADDR_BROADCAST;
/* Do the RPC/bootparam/whoami. */
error = bp_whoami(sin, &my_ip, &nd->nd_gwip);
error = bp_whoami(sin, &my_ip, &gw_ip);
if (error) {
printf("nfs_boot: bootparam whoami, error=%d\n", error);
goto out;
@ -209,13 +213,81 @@ nfs_bootparam(ifp, nd, procp)
}
#endif
#ifdef NFS_BOOT_GATEWAY
/*
* XXX - Use bp_getfile(sin, "gate", &gw_ip)
* to get the [router:mask] information, maybe?
* Better still, just use BOOTP/DHCP instead.
* Note: we normally ignore the gateway address returned
* by the "bootparam/whoami" RPC above, because many old
* bootparam servers supply a bogus gateway value.
*
* These deficiencies in the bootparam RPC interface are
* circumvented by using the bootparam/getfile RPC. The
* parameter "gateway" is requested, and if its returned,
* we use the "server" part of the reply as the gateway,
* and use the "pathname" part of the reply as the mask.
* (The mask comes to us as a string: "0x%x")
*/
if (gw_ip.s_addr) {
/* Our caller will add the route. */
nd->nd_gwip = gw_ip;
}
#endif
gw_ndm = malloc(sizeof(*gw_ndm), M_NFSMNT, M_WAITOK);
bzero((caddr_t)gw_ndm, sizeof(*gw_ndm));
error = bp_getfile(sin, "gateway", gw_ndm);
if (error) {
/* Ignore the error. No gateway supplied. */
error = 0;
goto out;
}
printf("nfs_boot: gateway=%s\n", gw_ndm->ndm_host);
sin = (struct sockaddr_in *) &gw_ndm->ndm_saddr;
nd->nd_gwip = sin->sin_addr;
/* Find the pathname part of the "mounted-on" string. */
p = strchr(gw_ndm->ndm_host, ':');
if (p == 0)
goto out;
/* have pathname */
/* XXX - Inline: sscanf(p, ":0x%x", &mask) */
mask = 0;
while (*p) {
switch (*p) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
x = (*p - '0');
break;
case 'A': case 'B': case 'C':
case 'D': case 'E': case 'F':
x = (*p - ('A' - 10));
break;
case 'a': case 'b': case 'c':
case 'd': case 'e': case 'f':
x = (*p - ('a' - 10));
break;
default:
mask = x = 0;
break;
}
mask = (mask << 4) + x;
p++;
}
if (mask == 0)
goto out;
/* Save our netmask and update the network interface. */
nd->nd_mask.s_addr = htonl(mask);
sin = (struct sockaddr_in *)&ireq.ifr_addr;
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_addr = nd->nd_mask;
error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)&ireq, procp);
if (error) {
printf("nfs_boot: set ifmask, error=%d\n", error);
error = 0; /* ignore it */
}
out:
if (gw_ndm)
free(gw_ndm, M_NFSMNT);
soclose(so);
return (error);
}