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author | luigi <luigi@FreeBSD.org> | 2002-03-13 09:23:11 +0000 |
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committer | luigi <luigi@FreeBSD.org> | 2002-03-13 09:23:11 +0000 |
commit | d4a3339ee0407cbcb5011092efa77422dfa52be7 (patch) | |
tree | 638cbf2eb69d4c10fc4f6c494720bd7e4c153041 /sys | |
parent | e11d2515d54dca98d8c75dba28e6922034531af9 (diff) | |
download | FreeBSD-src-d4a3339ee0407cbcb5011092efa77422dfa52be7.zip FreeBSD-src-d4a3339ee0407cbcb5011092efa77422dfa52be7.tar.gz |
Add a readonly sysctl variable of type string, kern.bootp_cookie,
which is initialized with whatever string a dhcp/bootp server passes
as vendor tag 134.
There is no standard tag that I know with this information, and
no vendor-defined tag that applies to FreeBSD that I could find
doing the same thing.
The intended use is to pass information to userland for run-time
configuration of a diskless client without having to run a bootp/dhcp
client for the third time (after the one in pxeboot/etherboot, and
the one in the kernel bootp), also because these clients generally
screwup the interface configuration, which is not exactly what you
want when you have your disks nfs-mounted.
Manpage update to follow soon.
MFC-after: 3 days
Diffstat (limited to 'sys')
-rw-r--r-- | sys/nfsclient/bootp_subr.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sys/nfsclient/bootp_subr.c b/sys/nfsclient/bootp_subr.c index 27a5877..5de53ef 100644 --- a/sys/nfsclient/bootp_subr.c +++ b/sys/nfsclient/bootp_subr.c @@ -55,6 +55,7 @@ __FBSDID("$FreeBSD$"); #include <sys/proc.h> #include <sys/socket.h> #include <sys/socketvar.h> +#include <sys/sysctl.h> #include <sys/uio.h> #include <net/if.h> @@ -197,6 +198,7 @@ struct bootpc_globalcontext { #define TAG_SWAPSIZE 129 #define TAG_ROOTOPTS 130 #define TAG_SWAPOPTS 131 +#define TAG_COOKIE 134 /* ascii info for userland, via sysctl */ #define TAG_DHCP_MSGTYPE 53 #define TAG_DHCP_REQ_ADDR 50 @@ -209,6 +211,10 @@ struct bootpc_globalcontext { #define DHCP_REQUEST 3 #define DHCP_ACK 5 +static char bootp_cookie[128]; +SYSCTL_STRING(_kern, OID_AUTO, bootp_cookie, CTLFLAG_RD, + bootp_cookie, 0, "Cookie (T134) supplied by bootp server"); + /* mountd RPC */ static int md_mount(struct sockaddr_in *mdsin, char *path, u_char *fhp, int *fhsizep, struct nfs_args *args, struct thread *td); @@ -1607,6 +1613,15 @@ bootpc_decode_reply(struct nfsv3_diskless *nd, struct bootpc_ifcontext *ifctx, 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"); |