/*
* Create a credential that we can send to the X server.
*/
static int
auth_ezencode(
char *servername,
int window,
char *cred_out,
int *len)
{
AUTH *a;
XDR xdr;
#if defined(SVR4) && defined(sun)
a = authdes_seccreate(servername, window, NULL, NULL);
#else
a = (AUTH *)authdes_create(servername, window, NULL, NULL);
#endif
if (a == (AUTH *)NULL) {
perror("auth_create");
return 0;
}
xdrmem_create(&xdr, cred_out, *len, XDR_ENCODE);
if (AUTH_MARSHALL(a, &xdr) == FALSE) {
perror("auth_marshall");
AUTH_DESTROY(a);
return 0;
}
*len = xdr_getpos(&xdr);
AUTH_DESTROY(a);
return 1;
}
/* Dispose a channel. */
void nfs_rpc_destroy_chan(rpc_call_channel_t *chan)
{
assert(chan);
/* XXX lock, wait for outstanding calls, etc */
switch (chan->type) {
case RPC_CHAN_V40:
/* channel has a dedicated RPC client */
if (chan->clnt) {
/* clean up auth, if any */
if (chan->auth) {
AUTH_DESTROY(chan->auth);
chan->auth = NULL;
}
/* destroy it */
clnt_destroy(chan->clnt);
chan->clnt = NULL;
}
break;
case RPC_CHAN_V41:
/* XXX channel is shared */
break;
}
chan->clnt = NULL;
chan->last_called = 0;
}
/*
* Call the NFSv4 client's CB_NULL procedure.
*/
enum clnt_stat
rpc_cb_null(rpc_call_channel_t *chan, struct timeval timeout)
{
enum clnt_stat stat = RPC_SUCCESS;
/* XXX TI-RPC does the signal masking */
pthread_mutex_lock(&chan->mtx);
if (! chan->clnt) {
stat = RPC_INTR;
goto unlock;
}
stat = clnt_call(chan->clnt, chan->auth, CB_NULL,
(xdrproc_t) xdr_void, NULL,
(xdrproc_t) xdr_void, NULL, timeout);
/* If a call fails, we have to assume path down, or equally fatal
* error. We may need back-off. */
if (stat != RPC_SUCCESS) {
if (chan->clnt) {
if (chan->auth) {
AUTH_DESTROY(chan->auth);
chan->auth = NULL;
}
clnt_destroy(chan->clnt);
chan->clnt = NULL;
}
}
unlock:
pthread_mutex_unlock(&chan->mtx);
return (stat);
}
kadm5_ret_t
kadm5_destroy(void *server_handle)
{
krb5_ccache ccache = NULL;
int code = KADM5_OK;
kadm5_server_handle_t handle =
(kadm5_server_handle_t) server_handle;
CHECK_HANDLE(server_handle);
if (handle->destroy_cache && handle->cache_name) {
if ((code = krb5_cc_resolve(handle->context,
handle->cache_name, &ccache)) == 0)
code = krb5_cc_destroy (handle->context, ccache);
}
if (handle->cache_name)
free(handle->cache_name);
if (handle->clnt && handle->clnt->cl_auth)
AUTH_DESTROY(handle->clnt->cl_auth);
if (handle->clnt)
clnt_destroy(handle->clnt);
if (handle->client_socket != -1)
close(handle->client_socket);
if (handle->lhandle)
free (handle->lhandle);
kadm5_free_config_params(handle->context, &handle->params);
handle->magic_number = 0;
free(handle);
return code;
}
void nsm_disconnect()
{
if (nsm_count == 0 && nsm_clnt != NULL) {
gsh_clnt_destroy(nsm_clnt);
nsm_clnt = NULL;
AUTH_DESTROY(nsm_auth);
nsm_auth = NULL;
gsh_free(nodename);
nodename = NULL;
}
}
enum clnt_stat
clnt_broadcast(u_long prog, /* program number */
u_long vers, /* version number */
u_long proc, /* procedure number */
xdrproc_t xargs, /* xdr routine for args */
caddr_t argsp, /* pointer to args */
xdrproc_t xresults, /* xdr routine for results */
caddr_t resultsp, /* pointer to results */
resultproc_t eachresult) /* call with each result obtained */
{
enum clnt_stat stat;
AUTH *unix_auth;
XDR xdr_stream;
XDR *xdrs = &xdr_stream;
int outlen, inlen, nets;
socklen_t fromlen;
int sock = -1;
int on = 1;
struct pollfd pfd[1];
int i;
int timo;
bool_t done = FALSE;
u_long xid;
u_long port;
struct in_addr *addrs = NULL;
struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
struct rmtcallargs a;
struct rmtcallres r;
struct rpc_msg msg;
char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
if ((unix_auth = authunix_create_default()) == NULL) {
stat = RPC_AUTHERROR;
goto done_broad;
}
/*
* initialization: create a socket, a broadcast address, and
* preserialize the arguments into a send buffer.
*/
if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
stat = RPC_CANTSEND;
goto done_broad;
}
#ifdef SO_BROADCAST
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) {
stat = RPC_CANTSEND;
goto done_broad;
}
#endif /* def SO_BROADCAST */
pfd[0].fd = sock;
pfd[0].events = POLLIN;
nets = newgetbroadcastnets(&addrs);
if (nets == 0) {
stat = RPC_CANTSEND;
goto done_broad;
}
memset(&baddr, 0, sizeof (baddr));
baddr.sin_len = sizeof(struct sockaddr_in);
baddr.sin_family = AF_INET;
baddr.sin_port = htons(PMAPPORT);
baddr.sin_addr.s_addr = htonl(INADDR_ANY);
msg.rm_xid = xid = arc4random();
msg.rm_direction = CALL;
msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
msg.rm_call.cb_prog = PMAPPROG;
msg.rm_call.cb_vers = PMAPVERS;
msg.rm_call.cb_proc = PMAPPROC_CALLIT;
msg.rm_call.cb_cred = unix_auth->ah_cred;
msg.rm_call.cb_verf = unix_auth->ah_verf;
a.prog = prog;
a.vers = vers;
a.proc = proc;
a.xdr_args = xargs;
a.args_ptr = argsp;
r.port_ptr = &port;
r.xdr_results = xresults;
r.results_ptr = resultsp;
xdrmem_create(xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
if (!xdr_callmsg(xdrs, &msg) || !xdr_rmtcall_args(xdrs, &a)) {
stat = RPC_CANTENCODEARGS;
goto done_broad;
}
outlen = (int)xdr_getpos(xdrs);
xdr_destroy(xdrs);
/*
* Basic loop: broadcast a packet and wait a while for response(s).
* The response timeout grows larger per iteration.
*
* XXX This will loop about 5 times the stop. If there are
* lots of signals being received by the process it will quit
* send them all in one quick burst, not paying attention to
* the intended function of sending them slowly over half a
* minute or so
*/
for (timo = 4000; timo <= 14000; timo += 2000) {
for (i = 0; i < nets; i++) {
baddr.sin_addr = addrs[i];
if (sendto(sock, outbuf, outlen, 0,
(struct sockaddr *)&baddr,
sizeof (struct sockaddr)) != outlen) {
stat = RPC_CANTSEND;
goto done_broad;
}
}
if (eachresult == NULL) {
stat = RPC_SUCCESS;
goto done_broad;
}
recv_again:
msg.acpted_rply.ar_verf = _null_auth;
msg.acpted_rply.ar_results.where = (caddr_t)&r;
msg.acpted_rply.ar_results.proc = xdr_rmtcallres;
switch (poll(pfd, 1, timo)) {
case 0: /* timed out */
stat = RPC_TIMEDOUT;
continue;
case 1:
if (pfd[0].revents & POLLNVAL)
errno = EBADF;
else if (pfd[0].revents & POLLERR)
errno = EIO;
else
break;
/* FALLTHROUGH */
case -1: /* some kind of error */
if (errno == EINTR)
goto recv_again;
stat = RPC_CANTRECV;
goto done_broad;
}
try_again:
fromlen = sizeof(struct sockaddr);
inlen = recvfrom(sock, inbuf, UDPMSGSIZE, 0,
(struct sockaddr *)&raddr, &fromlen);
if (inlen < 0) {
if (errno == EINTR)
goto try_again;
stat = RPC_CANTRECV;
goto done_broad;
}
if (inlen < sizeof(u_int32_t))
goto recv_again;
/*
* see if reply transaction id matches sent id.
* If so, decode the results.
*/
xdrmem_create(xdrs, inbuf, (u_int)inlen, XDR_DECODE);
if (xdr_replymsg(xdrs, &msg)) {
if ((msg.rm_xid == xid) &&
(msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
(msg.acpted_rply.ar_stat == SUCCESS)) {
raddr.sin_port = htons((u_short)port);
done = (*eachresult)(resultsp, &raddr);
}
/* otherwise, we just ignore the errors ... */
}
xdrs->x_op = XDR_FREE;
msg.acpted_rply.ar_results.proc = xdr_void;
(void)xdr_replymsg(xdrs, &msg);
(void)(*xresults)(xdrs, resultsp);
xdr_destroy(xdrs);
if (done) {
stat = RPC_SUCCESS;
goto done_broad;
} else {
goto recv_again;
}
}
done_broad:
if (addrs)
free(addrs);
if (sock >= 0)
(void)close(sock);
if (unix_auth != NULL)
AUTH_DESTROY(unix_auth);
return (stat);
}
enum clnt_stat
clnt_broadcast(
unsigned long prog, /* program number */
unsigned long vers, /* version number */
unsigned long proc, /* procedure number */
xdrproc_t xargs, /* xdr routine for args */
char* argsp, /* pointer to args */
xdrproc_t xresults, /* xdr routine for results */
char* resultsp, /* pointer to results */
resultproc_t eachresult) /* call with each result obtained */
{
enum clnt_stat stat;
AUTH *unix_auth = authunix_create_default();
XDR xdr_stream;
register XDR *xdrs = &xdr_stream;
int outlen, nets;
ssize_t inlen;
socklen_t fromlen;
register int sock;
int on = 1;
#ifdef FD_SETSIZE
fd_set mask;
fd_set readfds;
#else
int readfds;
register int mask;
#endif /* def FD_SETSIZE */
register int i;
bool_t done = FALSE;
register unsigned long xid;
unsigned long port;
struct in_addr addrs[20];
struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
struct rmtcallargs a;
struct rmtcallres r;
struct rpc_msg msg;
struct timeval t;
char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
/*
* initialization: create a socket, a broadcast address, and
* preserialize the arguments into a send buffer.
*/
if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
perror("Cannot create socket for broadcast rpc");
stat = RPC_CANTSEND;
goto done_broad;
}
#ifdef SO_BROADCAST
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) {
perror("Cannot set socket option SO_BROADCAST");
stat = RPC_CANTSEND;
goto done_broad;
}
#endif /* def SO_BROADCAST */
#ifdef FD_SETSIZE
FD_ZERO(&mask);
FD_SET(sock, &mask);
#else
mask = (1 << sock);
#endif /* def FD_SETSIZE */
nets = getbroadcastnets(addrs, sock, inbuf);
bzero((char *)&baddr, sizeof (baddr));
baddr.sin_family = AF_INET;
baddr.sin_port = htons(PMAPPORT);
baddr.sin_addr.s_addr = htonl(INADDR_ANY);
/* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
(void)gettimeofday(&t, NULL);
msg.rm_xid = xid = getpid() ^ t.tv_sec ^ t.tv_usec;
t.tv_usec = 0;
msg.rm_direction = CALL;
msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
msg.rm_call.cb_prog = PMAPPROG;
msg.rm_call.cb_vers = PMAPVERS;
msg.rm_call.cb_proc = PMAPPROC_CALLIT;
msg.rm_call.cb_cred = unix_auth->ah_cred;
msg.rm_call.cb_verf = unix_auth->ah_verf;
a.prog = prog;
a.vers = vers;
a.proc = proc;
a.xdr_args = xargs;
a.args_ptr = argsp;
r.port_ptr = &port;
r.xdr_results = xresults;
r.results_ptr = resultsp;
xdrmem_create(xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
if ((! xdr_callmsg(xdrs, &msg)) || (! xdr_rmtcall_args(xdrs, &a))) {
stat = RPC_CANTENCODEARGS;
goto done_broad;
}
outlen = (int)xdr_getpos(xdrs);
xdr_destroy(xdrs);
/*
* Basic loop: broadcast a packet and wait a while for response(s).
* The response timeout grows larger per iteration.
*/
for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2) {
for (i = 0; i < nets; i++) {
baddr.sin_addr = addrs[i];
if (sendto(sock, outbuf, outlen, 0,
(struct sockaddr *)&baddr,
sizeof (struct sockaddr)) != (ssize_t)outlen) {
perror("Cannot send broadcast packet");
stat = RPC_CANTSEND;
goto done_broad;
}
}
if (eachresult == NULL) {
stat = RPC_SUCCESS;
goto done_broad;
}
recv_again:
msg.acpted_rply.ar_verf = _null_auth;
msg.acpted_rply.ar_results.where = (char*)&r;
msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_rmtcallres;
readfds = mask;
{
struct timeval tmp = t;
switch (select(sock+1, &readfds, NULL,
NULL, &tmp)) {
case 0: /* timed out */
stat = RPC_TIMEDOUT;
continue;
case -1: /* some kind of error */
if (errno == EINTR)
goto recv_again;
perror("Broadcast select problem");
stat = RPC_CANTRECV;
goto done_broad;
} /* end of select results switch */
} /* end of temporary timeout variable */
try_again:
fromlen = (socklen_t)sizeof(struct sockaddr);
inlen = recvfrom(sock, inbuf, UDPMSGSIZE, 0,
(struct sockaddr *)&raddr, &fromlen);
if (inlen < 0) {
if (errno == EINTR)
goto try_again;
perror("Cannot receive reply to broadcast");
stat = RPC_CANTRECV;
goto done_broad;
}
if (inlen < sizeof(uint32_t))
goto recv_again;
/*
* see if reply transaction id matches sent id.
* If so, decode the results.
*/
xdrmem_create(xdrs, inbuf, (unsigned)inlen, XDR_DECODE);
if (xdr_replymsg(xdrs, &msg)) {
if ((msg.rm_xid == xid) &&
(msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
(msg.acpted_rply.ar_stat == SUCCESS)) {
raddr.sin_port = htons((unsigned short)port);
done = (*eachresult)(resultsp, &raddr);
}
/* otherwise, we just ignore the errors ... */
} else {
#ifdef notdef
/* some kind of deserialization problem ... */
if (msg.rm_xid == xid)
(void)fprintf(stderr, "Broadcast deserialization problem");
/* otherwise, just random garbage */
#endif
}
xdrs->x_op = XDR_FREE;
msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
(void)xdr_replymsg(xdrs, &msg);
(void)(*xresults)(xdrs, resultsp);
xdr_destroy(xdrs);
if (done) {
stat = RPC_SUCCESS;
goto done_broad;
} else {
goto recv_again;
}
}
done_broad:
(void)close(sock);
AUTH_DESTROY(unix_auth);
return (stat);
}
/*
* This routine will open a device as it is known by the V2 OBP. It
* then goes thru the stuff necessary to initialize the network device,
* get our network parameters, (using DHCP or rarp/bootparams), and
* finally actually go and get the root filehandle. Sound like fun?
* Suuurrrree. Take a look.
*
* Returns 0 if things worked. -1 if we crashed and burned.
*/
int
boot_nfs_mountroot(char *str)
{
int status;
enum clnt_stat rpc_stat;
char *root_path = &root_pathbuf[0]; /* to make XDR happy */
struct timeval wait;
int fd;
int bufsize;
char *opts, *val;
int nfs_version = 0;
int istcp = 1;
int nfs_port = 0; /* Cause pmap to get port */
struct sockaddr_in tmp_addr; /* throw away */
if (root_CLIENT != NULL) {
AUTH_DESTROY(root_CLIENT->cl_auth);
CLNT_DESTROY(root_CLIENT);
root_CLIENT = NULL;
}
root_to.sin_family = AF_INET;
root_to.sin_addr.s_addr = htonl(INADDR_ANY);
root_to.sin_port = htons(0);
mac_init(str);
(void) ipv4_setpromiscuous(TRUE);
if (get_netconfig_strategy() == NCT_BOOTP_DHCP) {
if (boothowto & RB_VERBOSE)
printf("Using BOOTP/DHCP...\n");
if (dhcp() != 0 || setup_root_vars() != 0) {
(void) ipv4_setpromiscuous(FALSE);
if (boothowto & RB_VERBOSE)
printf("BOOTP/DHCP configuration failed!\n");
return (-1);
}
/* now that we have an IP address, turn off promiscuous mode */
(void) ipv4_setpromiscuous(FALSE);
} else {
/* Use RARP/BOOTPARAMS. RARP will try forever... */
if (boothowto & RB_VERBOSE)
printf("Using RARP/BOOTPARAMS...\n");
mac_call_rarp();
/*
* Since there is no way to determine our netmask, and therefore
* figure out if the router we got is useful, we assume all
* services are local. Use DHCP if this bothers you.
*/
dontroute = TRUE;
/*
* We are trying to keep the ARP response
* timeout on the lower side with BOOTP/RARP.
* We are doing this for BOOTP/RARP where policy
* doesn't allow to route the packets outside
* the subnet as it has no idea about the
* netmask. By doing so, we are reducing
* ARP response timeout for any packet destined
* for outside booting clients subnet. Client can
* not expect such ARP replies and will finally
* timeout after a long delay. This would cause
* booting client to get stalled for a longer
* time. We can not avoid accepting any outside
* subnet packets accidentally destined for the
* booting client.
*/
mac_set_arp_timeout(ARP_INETBOOT_TIMEOUT);
/* now that we have an IP address, turn off promiscuous mode */
(void) ipv4_setpromiscuous(FALSE);
/* get our hostname */
if (whoami() == FALSE)
return (-1);
/* get our bootparams. */
if (getfile("root", root_hostname, &root_to.sin_addr,
root_pathbuf) == FALSE)
return (-1);
/* get our rootopts. */
(void) getfile("rootopts", root_hostname, &tmp_addr.sin_addr,
rootopts);
}
/* mount root */
if (boothowto & RB_VERBOSE) {
printf("root server: %s (%s)\n", root_hostname,
inet_ntoa(root_to.sin_addr));
printf("root directory: %s\n", root_pathbuf);
}
/*
* Assumes we've configured the stack and thus know our
* IP address/hostname, either by using DHCP or rarp/bootparams.
*/
gethostname(my_hostname, sizeof (my_hostname));
wait.tv_sec = RPC_RCVWAIT_MSEC / 1000;
wait.tv_usec = 0;
/*
* Parse out the interesting root options, if an invalid
* or unknown option is provided, silently ignore it and
* use the defaults.
*/
opts = rootopts;
while (*opts) {
int ival;
switch (getsubopt(&opts, optlist, &val)) {
case OPT_RSIZE:
if (val == NULL || !isdigit(*val))
break;
nfs_readsize = atoi(val);
break;
case OPT_TIMEO:
if (val == NULL || !isdigit(*val))
break;
ival = atoi(val);
wait.tv_sec = ival / 10;
wait.tv_usec = (ival % 10) * 100000;
break;
case OPT_VERS:
if (val == NULL || !isdigit(*val))
break;
nfs_version = atoi(val);
break;
case OPT_PROTO:
if (val == NULL || isdigit(*val))
break;
if ((strncmp(val, "udp", 3) == 0))
istcp = 0;
else
istcp = 1; /* must be tcp */
break;
case OPT_PORT:
if (val == NULL || !isdigit(*val))
break;
nfs_port = atoi(val);
/*
* Currently nfs_dlinet.c doesn't support setting
* the root NFS port. Delete this when it does.
*/
nfs_port = 0;
break;
default:
/*
* Unknown options are silently ignored
*/
break;
}
}
/*
* If version is set, then try that version first.
*/
switch (nfs_version) {
case NFS_VERSION:
if (nfsmountroot(root_path, &roothandle) == 0)
goto domount;
break;
case NFS_V3:
if (nfs3mountroot(root_path, &roothandle) == 0)
goto domount;
break;
case NFS_V4:
/*
* With v4 we skip the mount and go straight to
* setting the root filehandle. Because of this we
* do things slightly differently and obtain our
* client handle first.
*/
if (istcp && nfs4init(root_path, nfs_port) == 0) {
/*
* If v4 init succeeded then we are done. Just return.
*/
return (0);
}
}
/*
* If there was no chosen version or the chosen version failed
* try all versions in order, this may still fail to boot
* at the kernel level if the options are not right, but be
* generous at this early stage.
*/
if (istcp && nfs4init(root_path, nfs_port) == 0) {
/*
* If v4 init succeeded then we are done. Just return.
*/
return (0);
}
if (nfs3mountroot(root_path, &roothandle) == 0)
goto domount;
if ((status = nfsmountroot(root_path, &roothandle)) != 0)
return (status);
domount:
/*
* Only v2 and v3 go on from here.
*/
roothandle.offset = (uint_t)0; /* it's a directory! */
root_to.sin_port = htons(nfs_port); /* NFS is next after mount */
/*
* Create the CLIENT handle for NFS operations
*/
if (roothandle.version == NFS_VERSION)
bufsize = NFSBUF_SIZE;
else
bufsize = NFS3BUF_SIZE;
/*
* First try TCP then UDP (unless UDP asked for explicitly), if mountd
* alows this version but neither transport is available we are stuck.
*/
if (istcp) {
fd = -1;
root_CLIENT = clntbtcp_create(&root_to, NFS_PROGRAM,
roothandle.version, wait, &fd, bufsize, bufsize);
if (root_CLIENT != NULL) {
root_CLIENT->cl_auth =
authunix_create(my_hostname, 0, 1, 1, &fake_gids);
/*
* Send NULL proc, check if the server really exists
*/
rpc_stat = CLNT_CALL(root_CLIENT, 0,
xdr_void, NULL, xdr_void, NULL, wait);
if (rpc_stat == RPC_SUCCESS)
return (0);
AUTH_DESTROY(root_CLIENT->cl_auth);
CLNT_DESTROY(root_CLIENT);
root_CLIENT = NULL;
}
/* Fall through to UDP case */
}
fd = -1;
root_CLIENT = clntbudp_bufcreate(&root_to, NFS_PROGRAM,
roothandle.version, wait, &fd, bufsize, bufsize);
if (root_CLIENT == NULL)
return (-1);
root_CLIENT->cl_auth =
authunix_create(my_hostname, 0, 1, 1, &fake_gids);
/*
* Send NULL proc, check if the server really exists
*/
rpc_stat = CLNT_CALL(root_CLIENT, 0,
xdr_void, NULL, xdr_void, NULL, wait);
if (rpc_stat == RPC_SUCCESS)
return (0);
AUTH_DESTROY(root_CLIENT->cl_auth);
CLNT_DESTROY(root_CLIENT);
root_CLIENT = NULL;
return (-1);
}
/*
* Setup v4 client for inetboot
*/
static int
nfs4init(char *path, uint16_t nfs_port)
{
struct timeval wait;
int fd = -1;
int error = 0;
enum clnt_stat rpc_stat;
struct nfs_file rootpath;
wait.tv_sec = RPC_RCVWAIT_MSEC / 1000;
wait.tv_usec = 0;
/*
* If we haven't explicitly set the port number, set to the standard
* 2049 and don't cause a rpcbind request.
*/
if (nfs_port == 0)
nfs_port = 2049;
root_to.sin_port = htons(nfs_port);
/*
* Support TCP only
*/
root_CLIENT = clntbtcp_create(&root_to, NFS_PROGRAM,
NFS_V4, wait, &fd,
NFS4BUF_SIZE, NFS4BUF_SIZE);
if (root_CLIENT == NULL) {
root_to.sin_port = 0;
return (-1);
}
root_CLIENT->cl_auth =
authunix_create(my_hostname, 0, 1, 1, &fake_gids);
/*
* Send NULL proc the server first to see if V4 exists
*/
rpc_stat = CLNT_CALL(root_CLIENT, NFSPROC4_NULL, xdr_void, NULL,
xdr_void, NULL, wait);
if (rpc_stat != RPC_SUCCESS) {
dprintf("boot: NULL proc failed NFSv4 service not available\n");
AUTH_DESTROY(root_CLIENT->cl_auth);
CLNT_DESTROY(root_CLIENT);
root_to.sin_port = 0;
return (-1);
}
/*
* Do a lookup to get to the root_path. This is nice since it can
* handle multicomponent lookups.
*/
roothandle.version = NFS_V4;
roothandle.ftype.type4 = NF4DIR;
roothandle.fh.fh4.len = 0; /* Force a PUTROOTFH */
roothandle.offset = (uint_t)0; /* it's a directory! */
error = lookup(path, &rootpath, TRUE);
if (error) {
printf("boot: lookup %s failed\n", path);
return (-1);
}
roothandle = rootpath; /* structure copy */
/*
* Hardwire in a known reasonable upper limit of 32K
*/
nfs_readsize = nfs_readsize < 32 * 1024 ? nfs_readsize : 32 * 1024;
/*
* Set a reasonable lower limit on readsize
*/
nfs_readsize = (nfs_readsize != 0 && nfs_readsize < 512) ?
512 : nfs_readsize;
return (0);
}
/*
* This routine is designed to be able to "ping"
* a list of hosts and create a list of responding
* hosts sorted by response time.
* This must be done without any prior
* contact with the host - therefore the "ping"
* must be to a "well-known" address. The outstanding
* candidate here is the address of "rpcbind".
*
* A response to a ping is no guarantee that the host
* is running NFS, has a mount daemon, or exports
* the required filesystem. If the subsequent
* mount attempt fails then the host will be marked
* "ignore" and the host list will be re-pinged
* (sans the bad host). This process continues
* until a successful mount is achieved or until
* there are no hosts left to try.
*/
enum clnt_stat
nfs_cast(struct mapfs *mfs_in, struct mapfs **mfs_out, int timeout)
{
enum clnt_stat stat;
AUTH *sys_auth = authsys_create_default();
XDR xdr_stream;
register XDR *xdrs = &xdr_stream;
int outlen;
int if_inx;
int tsec;
int flag;
int sent, addr_cnt, rcvd, if_cnt;
fd_set readfds, mask;
register ulong_t xid; /* xid - unique per addr */
register int i;
struct rpc_msg msg;
struct timeval t, rcv_timeout;
char outbuf[UDPMSGSIZE], inbuf[UDPMSGSIZE];
struct t_unitdata t_udata, t_rdata;
struct nd_hostserv hs;
struct nd_addrlist *retaddrs;
struct transp *tr_head;
struct transp *trans, *prev_trans;
struct addrs *a, *prev_addr;
struct tstamps *ts, *prev_ts;
NCONF_HANDLE *nc = NULL;
struct netconfig *nconf;
struct rlimit rl;
int dtbsize;
struct mapfs *mfs;
/*
* For each connectionless transport get a list of
* host addresses. Any single host may have
* addresses on several transports.
*/
addr_cnt = sent = rcvd = 0;
tr_head = NULL;
FD_ZERO(&mask);
/*
* Set the default select size to be the maximum FD_SETSIZE, unless
* the current rlimit is lower.
*/
dtbsize = FD_SETSIZE;
if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
if (rl.rlim_cur < FD_SETSIZE)
dtbsize = rl.rlim_cur;
}
prev_trans = NULL;
prev_addr = NULL;
prev_ts = NULL;
for (mfs = mfs_in; mfs; mfs = mfs->mfs_next) {
if (trace > 2)
trace_prt(1, "nfs_cast: host=%s\n", mfs->mfs_host);
nc = setnetconfig();
if (nc == NULL) {
stat = RPC_CANTSEND;
goto done_broad;
}
while (nconf = getnetconfig(nc)) {
if (!(nconf->nc_flag & NC_VISIBLE) ||
nconf->nc_semantics != NC_TPI_CLTS ||
(strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0))
continue;
trans = (struct transp *)malloc(sizeof (*trans));
if (trans == NULL) {
syslog(LOG_ERR, "no memory");
stat = RPC_CANTSEND;
goto done_broad;
}
(void) memset(trans, 0, sizeof (*trans));
if (tr_head == NULL)
tr_head = trans;
else
prev_trans->tr_next = trans;
prev_trans = trans;
trans->tr_fd = t_open(nconf->nc_device, O_RDWR, NULL);
if (trans->tr_fd < 0) {
syslog(LOG_ERR, "nfscast: t_open: %s:%m",
nconf->nc_device);
stat = RPC_CANTSEND;
goto done_broad;
}
if (t_bind(trans->tr_fd, (struct t_bind *)NULL,
(struct t_bind *)NULL) < 0) {
syslog(LOG_ERR, "nfscast: t_bind: %m");
stat = RPC_CANTSEND;
goto done_broad;
}
trans->tr_taddr =
/* LINTED pointer alignment */
(struct t_bind *)t_alloc(trans->tr_fd, T_BIND, T_ADDR);
if (trans->tr_taddr == (struct t_bind *)NULL) {
syslog(LOG_ERR, "nfscast: t_alloc: %m");
stat = RPC_SYSTEMERROR;
goto done_broad;
}
trans->tr_device = nconf->nc_device;
FD_SET(trans->tr_fd, &mask);
if_inx = 0;
hs.h_host = mfs->mfs_host;
hs.h_serv = "rpcbind";
if (netdir_getbyname(nconf, &hs, &retaddrs) == ND_OK) {
/*
* If mfs->ignore is previously set for
* this map, clear it. Because a host can
* have either v6 or v4 address
*/
if (mfs->mfs_ignore == 1)
mfs->mfs_ignore = 0;
a = (struct addrs *)malloc(sizeof (*a));
if (a == NULL) {
syslog(LOG_ERR, "no memory");
stat = RPC_CANTSEND;
goto done_broad;
}
(void) memset(a, 0, sizeof (*a));
if (trans->tr_addrs == NULL)
trans->tr_addrs = a;
else
prev_addr->addr_next = a;
prev_addr = a;
a->addr_if_tstamps = NULL;
a->addr_mfs = mfs;
a->addr_addrs = retaddrs;
if_cnt = retaddrs->n_cnt;
while (if_cnt--) {
ts = (struct tstamps *)
malloc(sizeof (*ts));
if (ts == NULL) {
syslog(LOG_ERR, "no memory");
stat = RPC_CANTSEND;
goto done_broad;
}
(void) memset(ts, 0, sizeof (*ts));
ts->ts_penalty = mfs->mfs_penalty;
if (a->addr_if_tstamps == NULL)
a->addr_if_tstamps = ts;
else
prev_ts->ts_next = ts;
prev_ts = ts;
ts->ts_inx = if_inx++;
addr_cnt++;
}
break;
} else {
mfs->mfs_ignore = 1;
if (verbose)
syslog(LOG_ERR,
"%s:%s address not known",
mfs->mfs_host,
strcmp(nconf->nc_proto, NC_INET)?"IPv6":"IPv4");
}
} /* while */
endnetconfig(nc);
nc = NULL;
} /* for */
if (addr_cnt == 0) {
syslog(LOG_ERR, "nfscast: couldn't find addresses");
stat = RPC_CANTSEND;
goto done_broad;
}
(void) gettimeofday(&t, (struct timezone *)0);
xid = (getpid() ^ t.tv_sec ^ t.tv_usec) & ~0xFF;
t.tv_usec = 0;
/* serialize the RPC header */
msg.rm_direction = CALL;
msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
msg.rm_call.cb_prog = RPCBPROG;
/*
* we can not use RPCBVERS here since it doesn't exist in 4.X,
* the fix to bug 1139883 has made the 4.X portmapper silent to
* version mismatches. This causes the RPC call to the remote
* portmapper to simply be ignored if it's not Version 2.
*/
msg.rm_call.cb_vers = PMAPVERS;
msg.rm_call.cb_proc = NULLPROC;
if (sys_auth == (AUTH *)NULL) {
stat = RPC_SYSTEMERROR;
goto done_broad;
}
msg.rm_call.cb_cred = sys_auth->ah_cred;
msg.rm_call.cb_verf = sys_auth->ah_verf;
xdrmem_create(xdrs, outbuf, sizeof (outbuf), XDR_ENCODE);
if (! xdr_callmsg(xdrs, &msg)) {
stat = RPC_CANTENCODEARGS;
goto done_broad;
}
outlen = (int)xdr_getpos(xdrs);
xdr_destroy(xdrs);
t_udata.opt.len = 0;
t_udata.udata.buf = outbuf;
t_udata.udata.len = outlen;
/*
* Basic loop: send packet to all hosts and wait for response(s).
* The response timeout grows larger per iteration.
* A unique xid is assigned to each address in order to
* correctly match the replies.
*/
for (tsec = 4; timeout > 0; tsec *= 2) {
timeout -= tsec;
if (timeout <= 0)
tsec += timeout;
rcv_timeout.tv_sec = tsec;
rcv_timeout.tv_usec = 0;
sent = 0;
for (trans = tr_head; trans; trans = trans->tr_next) {
for (a = trans->tr_addrs; a; a = a->addr_next) {
struct netbuf *if_netbuf =
a->addr_addrs->n_addrs;
ts = a->addr_if_tstamps;
if_cnt = a->addr_addrs->n_cnt;
while (if_cnt--) {
/*
* xid is the first thing in
* preserialized buffer
*/
/* LINTED pointer alignment */
*((ulong_t *)outbuf) =
htonl(xid + ts->ts_inx);
(void) gettimeofday(&(ts->ts_timeval),
(struct timezone *)0);
/*
* Check if already received
* from a previous iteration.
*/
if (ts->ts_rcvd) {
sent++;
ts = ts->ts_next;
continue;
}
t_udata.addr = *if_netbuf++;
if (t_sndudata(trans->tr_fd,
&t_udata) == 0) {
sent++;
}
ts = ts->ts_next;
}
}
}
if (sent == 0) { /* no packets sent ? */
stat = RPC_CANTSEND;
goto done_broad;
}
/*
* Have sent all the packets. Now collect the responses...
*/
rcvd = 0;
recv_again:
msg.acpted_rply.ar_verf = _null_auth;
msg.acpted_rply.ar_results.proc = xdr_void;
readfds = mask;
switch (select(dtbsize, &readfds,
(fd_set *)NULL, (fd_set *)NULL, &rcv_timeout)) {
case 0: /* Timed out */
/*
* If we got at least one response in the
* last interval, then don't wait for any
* more. In theory we should wait for
* the max weighting (penalty) value so
* that a very slow server has a chance to
* respond but this could take a long time
* if the admin has set a high weighting
* value.
*/
if (rcvd > 0)
goto done_broad;
stat = RPC_TIMEDOUT;
continue;
case -1: /* some kind of error */
if (errno == EINTR)
goto recv_again;
syslog(LOG_ERR, "nfscast: select: %m");
if (rcvd == 0)
stat = RPC_CANTRECV;
goto done_broad;
} /* end of select results switch */
for (trans = tr_head; trans; trans = trans->tr_next) {
if (FD_ISSET(trans->tr_fd, &readfds))
break;
}
if (trans == NULL)
goto recv_again;
try_again:
t_rdata.addr = trans->tr_taddr->addr;
t_rdata.udata.buf = inbuf;
t_rdata.udata.maxlen = sizeof (inbuf);
t_rdata.udata.len = 0;
t_rdata.opt.len = 0;
if (t_rcvudata(trans->tr_fd, &t_rdata, &flag) < 0) {
if (errno == EINTR)
goto try_again;
syslog(LOG_ERR, "nfscast: t_rcvudata: %s:%m",
trans->tr_device);
stat = RPC_CANTRECV;
continue;
}
if (t_rdata.udata.len < sizeof (ulong_t))
goto recv_again;
if (flag & T_MORE) {
syslog(LOG_ERR,
"nfscast: t_rcvudata: %s: buffer overflow",
trans->tr_device);
goto recv_again;
}
/*
* see if reply transaction id matches sent id.
* If so, decode the results.
* Note: received addr is ignored, it could be
* different from the send addr if the host has
* more than one addr.
*/
xdrmem_create(xdrs, inbuf, (uint_t)t_rdata.udata.len,
XDR_DECODE);
if (xdr_replymsg(xdrs, &msg)) {
if (msg.rm_reply.rp_stat == MSG_ACCEPTED &&
(msg.rm_xid & ~0xFF) == xid) {
struct addrs *curr_addr;
i = msg.rm_xid & 0xFF;
for (curr_addr = trans->tr_addrs; curr_addr;
curr_addr = curr_addr->addr_next) {
for (ts = curr_addr->addr_if_tstamps; ts;
ts = ts->ts_next)
if (ts->ts_inx == i && !ts->ts_rcvd) {
ts->ts_rcvd = 1;
calc_resp_time(&ts->ts_timeval);
stat = RPC_SUCCESS;
rcvd++;
break;
}
}
} /* otherwise, we just ignore the errors ... */
}
xdrs->x_op = XDR_FREE;
msg.acpted_rply.ar_results.proc = xdr_void;
(void) xdr_replymsg(xdrs, &msg);
XDR_DESTROY(xdrs);
if (rcvd == sent)
goto done_broad;
else
goto recv_again;
}
if (!rcvd)
stat = RPC_TIMEDOUT;
done_broad:
if (rcvd) {
*mfs_out = sort_responses(tr_head);
stat = RPC_SUCCESS;
}
if (nc)
endnetconfig(nc);
free_transports(tr_head);
AUTH_DESTROY(sys_auth);
return (stat);
}
int32_t
nfs_rpc_dispatch_call(rpc_call_t *call, uint32_t flags)
{
int code = 0;
struct timeval CB_TIMEOUT = {15, 0}; /* XXX */
/* send the call, set states, wake waiters, etc */
pthread_mutex_lock(&call->we.mtx);
switch (call->states) {
case NFS_CB_CALL_DISPATCH:
case NFS_CB_CALL_FINISHED:
/* XXX invalid entry states for nfs_rpc_dispatch_call */
abort();
}
call->states = NFS_CB_CALL_DISPATCH;
pthread_mutex_unlock(&call->we.mtx);
/* XXX TI-RPC does the signal masking */
pthread_mutex_lock(&call->chan->mtx);
if (! call->chan->clnt) {
call->stat = RPC_INTR;
goto unlock;
}
call->stat = clnt_call(call->chan->clnt,
call->chan->auth,
CB_COMPOUND,
(xdrproc_t) xdr_CB_COMPOUND4args,
&call->cbt.v_u.v4.args,
(xdrproc_t) xdr_CB_COMPOUND4res,
&call->cbt.v_u.v4.res,
CB_TIMEOUT);
/* If a call fails, we have to assume path down, or equally fatal
* error. We may need back-off. */
if (call->stat != RPC_SUCCESS) {
if (call->chan->clnt) {
if (call->chan->auth) {
AUTH_DESTROY(call->chan->auth);
call->chan->auth = NULL;
}
clnt_destroy(call->chan->clnt);
call->chan->clnt = NULL;
}
}
unlock:
pthread_mutex_unlock(&call->chan->mtx);
/* signal waiter(s) */
pthread_mutex_lock(&call->we.mtx);
call->states |= NFS_CB_CALL_FINISHED;
/* broadcast will generally be inexpensive */
if (call->flags & NFS_RPC_CALL_BROADCAST)
pthread_cond_broadcast(&call->we.cv);
pthread_mutex_unlock(&call->we.mtx);
/* call completion hook */
RPC_CALL_HOOK(call, RPC_CALL_COMPLETE, NULL, NFS_RPC_CALL_NONE);
return (code);
}
/*
* our version of brpc_call(). We cache in portnumber in to->sin_port for
* your convenience. to and from addresses are taken and received in network
* order.
*/
enum clnt_stat
brpc_call(
rpcprog_t prog, /* rpc program number to call. */
rpcvers_t vers, /* rpc program version */
rpcproc_t proc, /* rpc procedure to call */
xdrproc_t in_xdr, /* routine to serialize arguments */
caddr_t args, /* arg vector for remote call */
xdrproc_t out_xdr, /* routine to deserialize results */
caddr_t ret, /* addr of buf to place results in */
int rexmit, /* retransmission interval (secs) */
int wait_time, /* how long (secs) to wait (resp) */
struct sockaddr_in *to, /* destination */
struct sockaddr_in *from_who, /* responder's port/address */
uint_t auth) /* type of auth wanted. */
{
int s;
char hostname[MAXHOSTNAMELEN];
struct sockaddr_in from; /* us. */
socklen_t from_len;
XDR xmit_xdrs, rcv_xdrs; /* xdr memory */
AUTH *xmit_auth; /* our chosen auth cookie */
gid_t fake_gids = 1; /* fake gids list for auth_unix */
caddr_t trm_msg, rcv_msg; /* outgoing/incoming rpc mesgs */
struct rpc_msg reply; /* our reply msg header */
int trm_len, rcv_len;
struct rpc_err rpc_error; /* to store RPC errors in on rcv. */
static uint_t xid; /* current xid */
uint_t xmit_len; /* How much of the buffer we used */
int nrefreshes = 2; /* # of times to refresh cred */
int flags = 0; /* send flags */
uint_t xdelay;
int errors, preserve_errno;
uint32_t timeout;
socklen_t optlen;
xmit_auth = NULL;
trm_len = mac_get_mtu();
trm_msg = bkmem_alloc(trm_len);
rcv_msg = bkmem_alloc(NFSBUF_SIZE);
if (trm_msg == NULL || rcv_msg == NULL) {
errno = ENOMEM;
rpc_error.re_status = RPC_CANTSEND;
goto gt_error;
}
if ((s = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
rpc_error.re_status = RPC_CANTSEND;
goto gt_error;
}
if (dontroute) {
(void) setsockopt(s, SOL_SOCKET, SO_DONTROUTE,
(const void *)&dontroute, sizeof (dontroute));
}
if (to->sin_addr.s_addr == cached_destination.s_addr) {
optlen = sizeof (timeout);
(void) getsockopt(s, SOL_SOCKET, SO_RCVTIMEO, (void *)&timeout,
&optlen);
} else {
cached_destination.s_addr = htonl(INADDR_ANY);
}
/* Bind our endpoint. */
from.sin_family = AF_INET;
ipv4_getipaddr(&from.sin_addr);
from.sin_addr.s_addr = htonl(from.sin_addr.s_addr);
from.sin_port = get_source_port(B_TRUE);
if (bind(s, (struct sockaddr *)&from, sizeof (from)) < 0) {
rpc_error.re_status = RPC_CANTSEND;
goto gt_error;
}
bzero((caddr_t)&rpc_error, sizeof (struct rpc_err));
/* initialize reply's rpc_msg struct, so we can decode later. */
reply.acpted_rply.ar_verf = _null_auth; /* struct copy */
reply.acpted_rply.ar_results.where = ret;
reply.acpted_rply.ar_results.proc = out_xdr;
if (ntohs(to->sin_port) == 0) {
/* snag the udp port we need. */
if ((to->sin_port = (in_port_t)bpmap_getport(prog, vers,
&(rpc_error.re_status), to, NULL)) == 0)
goto gt_error;
to->sin_port = htons(to->sin_port);
}
/* generate xid - increment */
if (xid == 0)
xid = (uint_t)(prom_gettime() / 1000) + 1;
else
xid++;
/* set up outgoing pkt as xdr modified. */
xdrmem_create(&xmit_xdrs, trm_msg, trm_len, XDR_ENCODE);
/* setup rpc header */
if (rpc_hdr(&xmit_xdrs, xid, prog, vers, proc) != TRUE) {
dprintf("brpc_call: cannot setup rpc header.\n");
rpc_error.re_status = RPC_FAILED;
goto gt_error;
}
/* setup authentication */
switch (auth) {
case AUTH_NONE:
xmit_auth = authnone_create();
break;
case AUTH_UNIX:
/*
* Assumes we've configured the stack and thus know our
* IP address/hostname, either by using DHCP or rarp/bootparams.
*/
gethostname(hostname, sizeof (hostname));
xmit_auth = authunix_create(hostname, 0, 1, 1, &fake_gids);
break;
default:
dprintf("brpc_call: Unsupported authentication type: %d\n",
auth);
rpc_error.re_status = RPC_AUTHERROR;
goto gt_error;
/*NOTREACHED*/
}
/*
* rpc_hdr puts everything in the xmit buffer for the header
* EXCEPT the proc. Put it, and our authentication info into
* it now, serializing as we go. We will be at the place where
* we left off.
*/
xmit_xdrs.x_op = XDR_ENCODE;
if ((XDR_PUTINT32(&xmit_xdrs, (int32_t *)&proc) == FALSE) ||
(AUTH_MARSHALL(xmit_auth, &xmit_xdrs, NULL) == FALSE) ||
((*in_xdr)(&xmit_xdrs, args) == FALSE)) {
rpc_error.re_status = RPC_CANTENCODEARGS;
goto gt_error;
} else
xmit_len = (int)XDR_GETPOS(&xmit_xdrs); /* for sendto */
/*
* Right now the outgoing packet should be all serialized and
* ready to go... Set up timers.
*/
xdelay = (rexmit == 0) ? RPC_REXMIT_MSEC : (rexmit * 1000);
(void) setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, (void *)&xdelay,
sizeof (xdelay));
wait_time = (wait_time == 0) ? RPC_RCVWAIT_MSEC : (wait_time * 1000);
wait_time += prom_gettime();
/*
* send out the request. The first item in the receive buffer will
* be the xid. Check if it is correct.
*/
errors = 0;
rpc_error.re_status = RPC_TIMEDOUT;
do {
if (sendto(s, trm_msg, xmit_len, flags, (struct sockaddr *)to,
sizeof (struct sockaddr_in)) < 0) {
/*
* If errno is set to ETIMEDOUT, return
* with RPC status as RPC_TIMEDOUT. Calling
* funciton will take care of this error by
* retrying the RPC call.
*/
if (errno == ETIMEDOUT) {
rpc_error.re_status = RPC_TIMEDOUT;
} else {
rpc_error.re_status = RPC_CANTSEND;
}
goto gt_error;
}
from_len = sizeof (struct sockaddr_in);
while ((rcv_len = recvfrom(s, rcv_msg, NFSBUF_SIZE,
MSG_DONTWAIT, (struct sockaddr *)from_who,
&from_len)) > 0 || errors < RPC_ALLOWABLE_ERRORS) {
if (rcv_len < 0) {
if (errno == EWOULDBLOCK ||
errno == ETIMEDOUT) {
break; /* timeout */
}
rpc_error.re_status = RPC_CANTRECV;
goto gt_error;
}
if (ntohl(*((uint32_t *)(rcv_msg))) != xid) {
dprintf("brpc_call: xid: 0x%x != 0x%x\n",
*(uint32_t *)(rcv_msg), xid);
continue;
}
/*
* Let's deserialize the data into our 'ret' buffer.
*/
xdrmem_create(&rcv_xdrs, rcv_msg, rcv_len, XDR_DECODE);
if (xdr_replymsg(&rcv_xdrs, &reply) == FALSE) {
rpc_error.re_status = RPC_CANTDECODERES;
goto gt_error;
}
_seterr_reply(&reply, &rpc_error);
switch (rpc_error.re_status) {
case RPC_SUCCESS:
/*
* XXX - validate for unix and none
* always return true.
*/
if (AUTH_VALIDATE(xmit_auth,
&reply.acpted_rply.ar_verf) == FALSE) {
rpc_error.re_status = RPC_AUTHERROR;
rpc_error.re_why = AUTH_INVALIDRESP;
errors++;
}
if (reply.acpted_rply.ar_verf.oa_base !=
0) {
xmit_xdrs.x_op = XDR_FREE;
(void) xdr_opaque_auth(
&xmit_xdrs,
&reply.acpted_rply.ar_verf);
}
break;
case RPC_AUTHERROR:
/*
* Let's see if our credentials need
* refreshing
*/
if (nrefreshes > 0 && AUTH_REFRESH(xmit_auth,
NULL, NULL)) {
nrefreshes--;
}
errors++;
break;
case RPC_PROCUNAVAIL:
/*
* Might be a silly portmapper implementation
* erroneously responding to our rpc broadcast
* indirect portmapper call. For this
* particular case, we don't increment the
* error counter because we want to keep
* sifting for successful replies...
*/
if (to->sin_addr.s_addr !=
ntohl(INADDR_BROADCAST))
errors++;
break;
case RPC_PROGVERSMISMATCH:
/*
* Successfully talked to server, but they
* don't speak our lingo.
*/
goto gt_error;
default:
/* Just keep trying till there's no data... */
errors++;
break;
}
if (rpc_error.re_status != RPC_SUCCESS) {
dprintf("brpc_call: from: %s, error: ",
inet_ntoa(from_who->sin_addr));
rpc_disperr(&rpc_error);
} else
break;
}
/*
* If we're having trouble reassembling datagrams, let the
* application know ASAP so that it can take the appropriate
* actions.
*/
} while (rpc_error.re_status != RPC_SUCCESS && errno != ETIMEDOUT &&
prom_gettime() < wait_time);
gt_error:
if (xmit_auth != NULL)
AUTH_DESTROY(xmit_auth);
if (trm_msg != NULL)
bkmem_free(trm_msg, trm_len);
if (rcv_msg != NULL)
bkmem_free(rcv_msg, NFSBUF_SIZE);
if (rpc_error.re_status != RPC_SUCCESS)
rpc_disperr(&rpc_error);
/*
* socket calls reset errno. Since we want to hold onto the errno
* value if it is ETIMEDOUT to communicate to our caller that this
* RPC_TIMEDOUT situation is due to a stack problem (we're getting
* a reply, but the stack simply can't assemble it.), we need to
* preserve errno's value over the socket_close().
*/
preserve_errno = (errno == ETIMEDOUT) ? errno : 0;
(void) socket_close(s);
errno = preserve_errno;
return (rpc_error.re_status);
}
AUTH *
rpc_gss_seccreate(CLIENT *clnt, const char *principal,
const char *mechanism, rpc_gss_service_t service, const char *qop,
rpc_gss_options_req_t *options_req, rpc_gss_options_ret_t *options_ret)
{
AUTH *auth, *save_auth;
rpc_gss_options_ret_t options;
gss_OID oid;
u_int qop_num;
struct rpc_gss_data *gd;
OM_uint32 maj_stat = 0, min_stat = 0;
gss_buffer_desc principal_desc;
/*
* Bail out now if we don't know this mechanism.
*/
if (!rpc_gss_mech_to_oid(mechanism, &oid))
return (NULL);
if (qop) {
if (!rpc_gss_qop_to_num(qop, mechanism, &qop_num))
return (NULL);
} else {
qop_num = GSS_C_QOP_DEFAULT;
}
/*
* If the caller doesn't want the options, point at local
* storage to simplify the code below.
*/
if (!options_ret)
options_ret = &options;
/*
* Default service is integrity.
*/
if (service == rpc_gss_svc_default)
service = rpc_gss_svc_integrity;
memset(options_ret, 0, sizeof(*options_ret));
log_debug("in rpc_gss_seccreate()");
memset(&rpc_createerr, 0, sizeof(rpc_createerr));
auth = mem_alloc(sizeof(*auth));
if (auth == NULL) {
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = ENOMEM;
return (NULL);
}
gd = mem_alloc(sizeof(*gd));
if (gd == NULL) {
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = ENOMEM;
free(auth);
return (NULL);
}
auth->ah_ops = &rpc_gss_ops;
auth->ah_private = (caddr_t) gd;
auth->ah_cred.oa_flavor = RPCSEC_GSS;
principal_desc.value = (void *)(intptr_t) principal;
principal_desc.length = strlen(principal);
maj_stat = gss_import_name(&min_stat, &principal_desc,
GSS_C_NT_HOSTBASED_SERVICE, &gd->gd_name);
if (maj_stat != GSS_S_COMPLETE) {
options_ret->major_status = maj_stat;
options_ret->minor_status = min_stat;
goto bad;
}
if (options_req) {
gd->gd_options = *options_req;
} else {
gd->gd_options.req_flags = GSS_C_MUTUAL_FLAG;
gd->gd_options.time_req = 0;
gd->gd_options.my_cred = GSS_C_NO_CREDENTIAL;
gd->gd_options.input_channel_bindings = NULL;
}
gd->gd_clnt = clnt;
gd->gd_ctx = GSS_C_NO_CONTEXT;
gd->gd_mech = oid;
gd->gd_qop = qop_num;
gd->gd_cred.gc_version = RPCSEC_GSS_VERSION;
gd->gd_cred.gc_proc = RPCSEC_GSS_INIT;
gd->gd_cred.gc_seq = 0;
gd->gd_cred.gc_svc = service;
save_auth = clnt->cl_auth;
clnt->cl_auth = auth;
if (!rpc_gss_init(auth, options_ret)) {
clnt->cl_auth = save_auth;
goto bad;
}
clnt->cl_auth = save_auth;
return (auth);
bad:
AUTH_DESTROY(auth);
return (NULL);
}
/*
* this code uses the userland rpcsec gss library to create a krb5
* context on behalf of the kernel
*/
static void
process_krb5_upcall(struct clnt_info *clp, uid_t uid, int fd, char *tgtname,
char *service)
{
CLIENT *rpc_clnt = NULL;
AUTH *auth = NULL;
struct authgss_private_data pd;
gss_buffer_desc token;
int err, downcall_err = -EACCES;
OM_uint32 maj_stat, min_stat, lifetime_rec;
pid_t pid, childpid = -1;
gss_name_t gacceptor = GSS_C_NO_NAME;
gss_OID mech;
gss_buffer_desc acceptor = {0};
token.length = 0;
token.value = NULL;
memset(&pd, 0, sizeof(struct authgss_private_data));
/*
* If "service" is specified, then the kernel is indicating that
* we must use machine credentials for this request. (Regardless
* of the uid value or the setting of root_uses_machine_creds.)
* If the service value is "*", then any service name can be used.
* Otherwise, it specifies the service name that should be used.
* (For now, the values of service will only be "*" or "nfs".)
*
* Restricting gssd to use "nfs" service name is needed for when
* the NFS server is doing a callback to the NFS client. In this
* case, the NFS server has to authenticate itself as "nfs" --
* even if there are other service keys such as "host" or "root"
* in the keytab.
*
* Another case when the kernel may specify the service attribute
* is when gssd is being asked to create the context for a
* SETCLIENT_ID operation. In this case, machine credentials
* must be used for the authentication. However, the service name
* used for this case is not important.
*
*/
if (uid != 0 || (uid == 0 && root_uses_machine_creds == 0 &&
service == NULL)) {
/* already running as uid 0 */
if (uid == 0)
goto no_fork;
pid = fork();
switch(pid) {
case 0:
/* Child: fall through to rest of function */
childpid = getpid();
unsetenv("KRB5CCNAME");
printerr(2, "CHILD forked pid %d \n", childpid);
break;
case -1:
/* fork() failed! */
printerr(0, "WARNING: unable to fork() to handle"
"upcall: %s\n", strerror(errno));
return;
default:
/* Parent: just wait on child to exit and return */
do {
pid = wait(&err);
} while(pid == -1 && errno != -ECHILD);
if (WIFSIGNALED(err))
printerr(0, "WARNING: forked child was killed"
"with signal %d\n", WTERMSIG(err));
return;
}
no_fork:
auth = krb5_not_machine_creds(clp, uid, tgtname, &downcall_err,
&err, &rpc_clnt);
if (err)
goto out_return_error;
}
if (auth == NULL) {
if (uid == 0 && (root_uses_machine_creds == 1 ||
service != NULL)) {
auth = krb5_use_machine_creds(clp, uid, tgtname,
service, &rpc_clnt);
if (auth == NULL)
goto out_return_error;
} else {
/* krb5_not_machine_creds logs the error */
goto out_return_error;
}
}
if (!authgss_get_private_data(auth, &pd)) {
printerr(1, "WARNING: Failed to obtain authentication "
"data for user with uid %d for server %s\n",
uid, clp->servername);
goto out_return_error;
}
/* Grab the context lifetime and acceptor name out of the ctx. */
maj_stat = gss_inquire_context(&min_stat, pd.pd_ctx, NULL, &gacceptor,
&lifetime_rec, &mech, NULL, NULL, NULL);
if (maj_stat != GSS_S_COMPLETE) {
printerr(1, "WARNING: Failed to inquire context "
"maj_stat (0x%x)\n", maj_stat);
lifetime_rec = 0;
} else {
get_hostbased_client_buffer(gacceptor, mech, &acceptor);
gss_release_name(&min_stat, &gacceptor);
}
/*
* The serialization can mean turning pd.pd_ctx into a lucid context. If
* that happens then the pd.pd_ctx will be unusable, so we must never
* try to use it after this point.
*/
if (serialize_context_for_kernel(&pd.pd_ctx, &token, &krb5oid, NULL)) {
printerr(1, "WARNING: Failed to serialize krb5 context for "
"user with uid %d for server %s\n",
uid, clp->servername);
goto out_return_error;
}
do_downcall(fd, uid, &pd, &token, lifetime_rec, &acceptor);
out:
gss_release_buffer(&min_stat, &acceptor);
if (token.value)
free(token.value);
#ifdef HAVE_AUTHGSS_FREE_PRIVATE_DATA
if (pd.pd_ctx_hndl.length != 0 || pd.pd_ctx != 0)
authgss_free_private_data(&pd);
#endif
if (auth)
AUTH_DESTROY(auth);
if (rpc_clnt)
clnt_destroy(rpc_clnt);
pid = getpid();
if (pid == childpid)
exit(0);
else
return;
out_return_error:
do_error_downcall(fd, uid, downcall_err);
goto out;
}
static kadm5_ret_t
init_any(krb5_context context, char *client_name, enum init_type init_type,
char *pass, krb5_ccache ccache_in, char *service_name,
kadm5_config_params *params_in, krb5_ui_4 struct_version,
krb5_ui_4 api_version, char **db_args, void **server_handle)
{
int fd = -1;
krb5_boolean iprop_enable;
int port;
rpcprog_t rpc_prog;
rpcvers_t rpc_vers;
krb5_ccache ccache;
krb5_principal client = NULL, server = NULL;
kadm5_server_handle_t handle;
kadm5_config_params params_local;
int code = 0;
generic_ret *r;
initialize_ovk_error_table();
/* initialize_adb_error_table(); */
initialize_ovku_error_table();
if (! server_handle) {
return EINVAL;
}
if (! (handle = malloc(sizeof(*handle)))) {
return ENOMEM;
}
memset(handle, 0, sizeof(*handle));
if (! (handle->lhandle = malloc(sizeof(*handle)))) {
free(handle);
return ENOMEM;
}
handle->magic_number = KADM5_SERVER_HANDLE_MAGIC;
handle->struct_version = struct_version;
handle->api_version = api_version;
handle->clnt = 0;
handle->client_socket = -1;
handle->cache_name = 0;
handle->destroy_cache = 0;
handle->context = 0;
*handle->lhandle = *handle;
handle->lhandle->api_version = KADM5_API_VERSION_4;
handle->lhandle->struct_version = KADM5_STRUCT_VERSION;
handle->lhandle->lhandle = handle->lhandle;
handle->context = context;
if(client_name == NULL) {
free(handle);
return EINVAL;
}
/*
* Verify the version numbers before proceeding; we can't use
* CHECK_HANDLE because not all fields are set yet.
*/
GENERIC_CHECK_HANDLE(handle, KADM5_OLD_LIB_API_VERSION,
KADM5_NEW_LIB_API_VERSION);
memset(¶ms_local, 0, sizeof(params_local));
if ((code = kadm5_get_config_params(handle->context, 0,
params_in, &handle->params))) {
free(handle);
return(code);
}
#define REQUIRED_PARAMS (KADM5_CONFIG_REALM | \
KADM5_CONFIG_ADMIN_SERVER | \
KADM5_CONFIG_KADMIND_PORT)
if ((handle->params.mask & REQUIRED_PARAMS) != REQUIRED_PARAMS) {
free(handle);
return KADM5_MISSING_KRB5_CONF_PARAMS;
}
code = krb5_parse_name(handle->context, client_name, &client);
if (code)
goto error;
/*
* Get credentials. Also does some fallbacks in case kadmin/fqdn
* principal doesn't exist.
*/
code = get_init_creds(handle, client, init_type, pass, ccache_in,
service_name, handle->params.realm, &server);
if (code)
goto error;
/* If the service_name and client_name are iprop-centric, use the iprop
* port and RPC identifiers. */
iprop_enable = (service_name != NULL &&
strstr(service_name, KIPROP_SVC_NAME) != NULL &&
strstr(client_name, KIPROP_SVC_NAME) != NULL);
if (iprop_enable) {
port = handle->params.iprop_port;
rpc_prog = KRB5_IPROP_PROG;
rpc_vers = KRB5_IPROP_VERS;
} else {
port = handle->params.kadmind_port;
rpc_prog = KADM;
rpc_vers = KADMVERS;
}
code = connect_to_server(handle->params.admin_server, port, &fd);
if (code)
goto error;
handle->clnt = clnttcp_create(NULL, rpc_prog, rpc_vers, &fd, 0, 0);
if (handle->clnt == NULL) {
code = KADM5_RPC_ERROR;
#ifdef DEBUG
clnt_pcreateerror("clnttcp_create");
#endif
goto error;
}
handle->client_socket = fd;
handle->lhandle->clnt = handle->clnt;
handle->lhandle->client_socket = fd;
/* now that handle->clnt is set, we can check the handle */
if ((code = _kadm5_check_handle((void *) handle)))
goto error;
/*
* The RPC connection is open; establish the GSS-API
* authentication context.
*/
code = setup_gss(handle, params_in,
(init_type == INIT_CREDS) ? client : NULL, server);
if (code)
goto error;
/*
* Bypass the remainder of the code and return straightaway
* if the gss service requested is kiprop
*/
if (iprop_enable) {
code = 0;
*server_handle = (void *) handle;
goto cleanup;
}
r = init_2(&handle->api_version, handle->clnt);
if (r == NULL) {
code = KADM5_RPC_ERROR;
#ifdef DEBUG
clnt_perror(handle->clnt, "init_2 null resp");
#endif
goto error;
}
/* Drop down to v3 wire protocol if server does not support v4 */
if (r->code == KADM5_NEW_SERVER_API_VERSION &&
handle->api_version == KADM5_API_VERSION_4) {
handle->api_version = KADM5_API_VERSION_3;
r = init_2(&handle->api_version, handle->clnt);
if (r == NULL) {
code = KADM5_RPC_ERROR;
goto error;
}
}
/* Drop down to v2 wire protocol if server does not support v3 */
if (r->code == KADM5_NEW_SERVER_API_VERSION &&
handle->api_version == KADM5_API_VERSION_3) {
handle->api_version = KADM5_API_VERSION_2;
r = init_2(&handle->api_version, handle->clnt);
if (r == NULL) {
code = KADM5_RPC_ERROR;
goto error;
}
}
if (r->code) {
code = r->code;
goto error;
}
*server_handle = (void *) handle;
goto cleanup;
error:
/*
* Note that it is illegal for this code to execute if "handle"
* has not been allocated and initialized. I.e., don't use "goto
* error" before the block of code at the top of the function
* that allocates and initializes "handle".
*/
if (handle->destroy_cache && handle->cache_name) {
if (krb5_cc_resolve(handle->context,
handle->cache_name, &ccache) == 0)
(void) krb5_cc_destroy (handle->context, ccache);
}
if (handle->cache_name)
free(handle->cache_name);
if(handle->clnt && handle->clnt->cl_auth)
AUTH_DESTROY(handle->clnt->cl_auth);
if(handle->clnt)
clnt_destroy(handle->clnt);
if (fd != -1)
close(fd);
kadm5_free_config_params(handle->context, &handle->params);
cleanup:
krb5_free_principal(handle->context, client);
krb5_free_principal(handle->context, server);
if (code)
free(handle);
return code;
}
/*
* rpc_broadcast_exp()
*
* prog - program number
* vers - version number
* proc - procedure number
* xargs - xdr routine for args
* argsp - pointer to args
* xresults - xdr routine for results
* resultsp - pointer to results
* eachresult - call with each result obtained
* inittime - how long to wait initially
* waittime - maximum time to wait
* nettype - transport type
*/
enum clnt_stat
rpc_broadcast_exp(rpcprog_t prog, rpcvers_t vers, rpcproc_t proc,
xdrproc_t xargs, caddr_t argsp, xdrproc_t xresults, caddr_t resultsp,
resultproc_t eachresult, int inittime, int waittime,
const char *nettype)
{
enum clnt_stat stat = RPC_SUCCESS; /* Return status */
XDR xdr_stream; /* XDR stream */
XDR *xdrs = &xdr_stream;
struct rpc_msg msg; /* RPC message */
struct timeval t;
char *outbuf = NULL; /* Broadcast msg buffer */
char *inbuf = NULL; /* Reply buf */
int inlen;
u_int maxbufsize = 0;
AUTH *sys_auth = authunix_create_default();
u_int i;
void *handle;
char uaddress[1024]; /* A self imposed limit */
char *uaddrp = uaddress;
int pmap_reply_flag; /* reply recvd from PORTMAP */
/* An array of all the suitable broadcast transports */
struct {
int fd; /* File descriptor */
int af;
int proto;
struct netconfig *nconf; /* Netconfig structure */
u_int asize; /* Size of the addr buf */
u_int dsize; /* Size of the data buf */
struct sockaddr_storage raddr; /* Remote address */
broadlist_t nal;
} fdlist[MAXBCAST];
struct pollfd pfd[MAXBCAST];
size_t fdlistno = 0;
struct r_rpcb_rmtcallargs barg; /* Remote arguments */
struct r_rpcb_rmtcallres bres; /* Remote results */
size_t outlen;
struct netconfig *nconf;
int msec;
int pollretval;
int fds_found;
#ifdef PORTMAP
size_t outlen_pmap = 0;
u_long port; /* Remote port number */
int pmap_flag = 0; /* UDP exists ? */
char *outbuf_pmap = NULL;
struct rmtcallargs barg_pmap; /* Remote arguments */
struct rmtcallres bres_pmap; /* Remote results */
u_int udpbufsz = 0;
#endif /* PORTMAP */
if (sys_auth == NULL) {
return (RPC_SYSTEMERROR);
}
/*
* initialization: create a fd, a broadcast address, and send the
* request on the broadcast transport.
* Listen on all of them and on replies, call the user supplied
* function.
*/
if (nettype == NULL)
nettype = "datagram_n";
if ((handle = __rpc_setconf(nettype)) == NULL) {
AUTH_DESTROY(sys_auth);
return (RPC_UNKNOWNPROTO);
}
while ((nconf = __rpc_getconf(handle)) != NULL) {
int fd;
struct __rpc_sockinfo si;
if (nconf->nc_semantics != NC_TPI_CLTS)
continue;
if (fdlistno >= MAXBCAST)
break; /* No more slots available */
if (!__rpc_nconf2sockinfo(nconf, &si))
continue;
TAILQ_INIT(&fdlist[fdlistno].nal);
if (__rpc_getbroadifs(si.si_af, si.si_proto, si.si_socktype,
&fdlist[fdlistno].nal) == 0)
continue;
fd = _socket(si.si_af, si.si_socktype, si.si_proto);
if (fd < 0) {
stat = RPC_CANTSEND;
continue;
}
fdlist[fdlistno].af = si.si_af;
fdlist[fdlistno].proto = si.si_proto;
fdlist[fdlistno].fd = fd;
fdlist[fdlistno].nconf = nconf;
fdlist[fdlistno].asize = __rpc_get_a_size(si.si_af);
pfd[fdlistno].events = POLLIN | POLLPRI |
POLLRDNORM | POLLRDBAND;
pfd[fdlistno].fd = fdlist[fdlistno].fd = fd;
fdlist[fdlistno].dsize = __rpc_get_t_size(si.si_af, si.si_proto,
0);
if (maxbufsize <= fdlist[fdlistno].dsize)
maxbufsize = fdlist[fdlistno].dsize;
#ifdef PORTMAP
if (si.si_af == AF_INET && si.si_proto == IPPROTO_UDP) {
udpbufsz = fdlist[fdlistno].dsize;
if ((outbuf_pmap = malloc(udpbufsz)) == NULL) {
_close(fd);
stat = RPC_SYSTEMERROR;
goto done_broad;
}
pmap_flag = 1;
}
#endif /* PORTMAP */
fdlistno++;
}
if (fdlistno == 0) {
if (stat == RPC_SUCCESS)
stat = RPC_UNKNOWNPROTO;
goto done_broad;
}
if (maxbufsize == 0) {
if (stat == RPC_SUCCESS)
stat = RPC_CANTSEND;
goto done_broad;
}
inbuf = malloc(maxbufsize);
outbuf = malloc(maxbufsize);
if ((inbuf == NULL) || (outbuf == NULL)) {
stat = RPC_SYSTEMERROR;
goto done_broad;
}
/* Serialize all the arguments which have to be sent */
(void) gettimeofday(&t, NULL);
msg.rm_xid = __RPC_GETXID(&t);
msg.rm_direction = CALL;
msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
msg.rm_call.cb_prog = RPCBPROG;
msg.rm_call.cb_vers = RPCBVERS;
msg.rm_call.cb_proc = RPCBPROC_CALLIT;
barg.prog = prog;
barg.vers = vers;
barg.proc = proc;
barg.args.args_val = argsp;
barg.xdr_args = xargs;
bres.addr = uaddrp;
bres.results.results_val = resultsp;
bres.xdr_res = xresults;
msg.rm_call.cb_cred = sys_auth->ah_cred;
msg.rm_call.cb_verf = sys_auth->ah_verf;
xdrmem_create(xdrs, outbuf, maxbufsize, XDR_ENCODE);
if ((!xdr_callmsg(xdrs, &msg)) ||
(!xdr_rpcb_rmtcallargs(xdrs,
(struct rpcb_rmtcallargs *)(void *)&barg))) {
stat = RPC_CANTENCODEARGS;
goto done_broad;
}
outlen = xdr_getpos(xdrs);
xdr_destroy(xdrs);
#ifdef PORTMAP
/* Prepare the packet for version 2 PORTMAP */
if (pmap_flag) {
msg.rm_xid++; /* One way to distinguish */
msg.rm_call.cb_prog = PMAPPROG;
msg.rm_call.cb_vers = PMAPVERS;
msg.rm_call.cb_proc = PMAPPROC_CALLIT;
barg_pmap.prog = prog;
barg_pmap.vers = vers;
barg_pmap.proc = proc;
barg_pmap.args_ptr = argsp;
barg_pmap.xdr_args = xargs;
bres_pmap.port_ptr = &port;
bres_pmap.xdr_results = xresults;
bres_pmap.results_ptr = resultsp;
xdrmem_create(xdrs, outbuf_pmap, udpbufsz, XDR_ENCODE);
if ((! xdr_callmsg(xdrs, &msg)) ||
(! xdr_rmtcall_args(xdrs, &barg_pmap))) {
stat = RPC_CANTENCODEARGS;
goto done_broad;
}
outlen_pmap = xdr_getpos(xdrs);
xdr_destroy(xdrs);
}
#endif /* PORTMAP */
/*
* Basic loop: broadcast the packets to transports which
* support data packets of size such that one can encode
* all the arguments.
* Wait a while for response(s).
* The response timeout grows larger per iteration.
*/
for (msec = inittime; msec <= waittime; msec += msec) {
struct broadif *bip;
/* Broadcast all the packets now */
for (i = 0; i < fdlistno; i++) {
if (fdlist[i].dsize < outlen) {
stat = RPC_CANTSEND;
continue;
}
for (bip = TAILQ_FIRST(&fdlist[i].nal); bip != NULL;
bip = TAILQ_NEXT(bip, link)) {
void *addr;
addr = &bip->broadaddr;
__rpc_broadenable(fdlist[i].af, fdlist[i].fd,
bip);
/*
* Only use version 3 if lowvers is not set
*/
if (!__rpc_lowvers)
if (_sendto(fdlist[i].fd, outbuf,
outlen, 0, (struct sockaddr*)addr,
(size_t)fdlist[i].asize) !=
outlen) {
#ifdef RPC_DEBUG
perror("sendto");
#endif
warnx("clnt_bcast: cannot send "
"broadcast packet");
stat = RPC_CANTSEND;
continue;
}
#ifdef RPC_DEBUG
if (!__rpc_lowvers)
fprintf(stderr, "Broadcast packet sent "
"for %s\n",
fdlist[i].nconf->nc_netid);
#endif
#ifdef PORTMAP
/*
* Send the version 2 packet also
* for UDP/IP
*/
if (pmap_flag &&
fdlist[i].proto == IPPROTO_UDP) {
if (_sendto(fdlist[i].fd, outbuf_pmap,
outlen_pmap, 0, addr,
(size_t)fdlist[i].asize) !=
outlen_pmap) {
warnx("clnt_bcast: "
"Cannot send broadcast packet");
stat = RPC_CANTSEND;
continue;
}
}
#ifdef RPC_DEBUG
fprintf(stderr, "PMAP Broadcast packet "
"sent for %s\n",
fdlist[i].nconf->nc_netid);
#endif
#endif /* PORTMAP */
}
/* End for sending all packets on this transport */
} /* End for sending on all transports */
if (eachresult == NULL) {
stat = RPC_SUCCESS;
goto done_broad;
}
/*
* Get all the replies from these broadcast requests
*/
recv_again:
switch (pollretval = _poll(pfd, fdlistno, msec)) {
case 0: /* timed out */
stat = RPC_TIMEDOUT;
continue;
case -1: /* some kind of error - we ignore it */
goto recv_again;
} /* end of poll results switch */
for (i = fds_found = 0;
i < fdlistno && fds_found < pollretval; i++) {
bool_t done = FALSE;
if (pfd[i].revents == 0)
continue;
else if (pfd[i].revents & POLLNVAL) {
/*
* Something bad has happened to this descri-
* ptor. We can cause _poll() to ignore
* it simply by using a negative fd. We do that
* rather than compacting the pfd[] and fdlist[]
* arrays.
*/
pfd[i].fd = -1;
fds_found++;
continue;
} else
fds_found++;
#ifdef RPC_DEBUG
fprintf(stderr, "response for %s\n",
fdlist[i].nconf->nc_netid);
#endif
try_again:
inlen = _recvfrom(fdlist[i].fd, inbuf, fdlist[i].dsize,
0, (struct sockaddr *)(void *)&fdlist[i].raddr,
&fdlist[i].asize);
if (inlen < 0) {
if (errno == EINTR)
goto try_again;
warnx("clnt_bcast: Cannot receive reply to "
"broadcast");
stat = RPC_CANTRECV;
continue;
}
if (inlen < sizeof (u_int32_t))
continue; /* Drop that and go ahead */
/*
* see if reply transaction id matches sent id.
* If so, decode the results. If return id is xid + 1
* it was a PORTMAP reply
*/
if (*((u_int32_t *)(void *)(inbuf)) ==
*((u_int32_t *)(void *)(outbuf))) {
pmap_reply_flag = 0;
msg.acpted_rply.ar_verf = _null_auth;
msg.acpted_rply.ar_results.where =
(caddr_t)(void *)&bres;
msg.acpted_rply.ar_results.proc =
(xdrproc_t)xdr_rpcb_rmtcallres;
#ifdef PORTMAP
} else if (pmap_flag &&
*((u_int32_t *)(void *)(inbuf)) ==
*((u_int32_t *)(void *)(outbuf_pmap))) {
pmap_reply_flag = 1;
msg.acpted_rply.ar_verf = _null_auth;
msg.acpted_rply.ar_results.where =
(caddr_t)(void *)&bres_pmap;
msg.acpted_rply.ar_results.proc =
(xdrproc_t)xdr_rmtcallres;
#endif /* PORTMAP */
} else
continue;
xdrmem_create(xdrs, inbuf, (u_int)inlen, XDR_DECODE);
if (xdr_replymsg(xdrs, &msg)) {
if ((msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
(msg.acpted_rply.ar_stat == SUCCESS)) {
struct netbuf taddr, *np;
struct sockaddr_in *sin;
#ifdef PORTMAP
if (pmap_flag && pmap_reply_flag) {
sin = (struct sockaddr_in *)
(void *)&fdlist[i].raddr;
sin->sin_port =
htons((u_short)port);
taddr.len = taddr.maxlen =
fdlist[i].raddr.ss_len;
taddr.buf = &fdlist[i].raddr;
done = (*eachresult)(resultsp,
&taddr, fdlist[i].nconf);
} else {
#endif /* PORTMAP */
#ifdef RPC_DEBUG
fprintf(stderr, "uaddr %s\n",
uaddrp);
#endif
np = uaddr2taddr(
fdlist[i].nconf, uaddrp);
done = (*eachresult)(resultsp,
np, fdlist[i].nconf);
free(np);
#ifdef PORTMAP
}
#endif /* PORTMAP */
}
/* otherwise, we just ignore the errors ... */
}
/* else some kind of deserialization problem ... */
xdrs->x_op = XDR_FREE;
msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void;
(void) xdr_replymsg(xdrs, &msg);
(void) (*xresults)(xdrs, resultsp);
XDR_DESTROY(xdrs);
if (done) {
stat = RPC_SUCCESS;
goto done_broad;
} else {
goto recv_again;
}
} /* The recv for loop */
} /* The giant for loop */
done_broad:
free(inbuf);
free(outbuf);
#ifdef PORTMAP
free(outbuf_pmap);
#endif /* PORTMAP */
for (i = 0; i < fdlistno; i++) {
(void)_close(fdlist[i].fd);
__rpc_freebroadifs(&fdlist[i].nal);
}
AUTH_DESTROY(sys_auth);
(void) __rpc_endconf(handle);
return (stat);
}
/*
* nfs_request - goes something like this
* - fill in request struct
* - links it into list
* - calls nfs_send() for first transmit
* - calls nfs_receive() to get reply
* - break down rpc header and return with nfs reply pointed to
* by mrep or error
* nb: always frees up mreq mbuf list
*/
int
nfs_request(struct vnode *vp, struct mbuf *mreq, int procnum,
struct thread *td, struct ucred *cred, struct mbuf **mrp,
struct mbuf **mdp, caddr_t *dposp)
{
struct mbuf *mrep;
u_int32_t *tl;
struct nfsmount *nmp;
struct mbuf *md;
time_t waituntil;
caddr_t dpos;
int error = 0, timeo;
AUTH *auth = NULL;
enum nfs_rto_timer_t timer;
struct nfs_feedback_arg nf;
struct rpc_callextra ext;
enum clnt_stat stat;
struct timeval timo;
/* Reject requests while attempting a forced unmount. */
if (vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF) {
m_freem(mreq);
return (ESTALE);
}
nmp = VFSTONFS(vp->v_mount);
bzero(&nf, sizeof(struct nfs_feedback_arg));
nf.nf_mount = nmp;
nf.nf_td = td;
nf.nf_lastmsg = time_uptime -
((nmp->nm_tprintf_delay) - (nmp->nm_tprintf_initial_delay));
/*
* XXX if not already connected call nfs_connect now. Longer
* term, change nfs_mount to call nfs_connect unconditionally
* and let clnt_reconnect_create handle reconnects.
*/
if (!nmp->nm_client)
nfs_connect(nmp);
auth = nfs_getauth(nmp, cred);
if (!auth) {
m_freem(mreq);
return (EACCES);
}
bzero(&ext, sizeof(ext));
ext.rc_auth = auth;
ext.rc_feedback = nfs_feedback;
ext.rc_feedback_arg = &nf;
/*
* Use a conservative timeout for RPCs other than getattr,
* lookup, read or write. The justification for doing "other"
* this way is that these RPCs happen so infrequently that
* timer est. would probably be stale. Also, since many of
* these RPCs are non-idempotent, a conservative timeout is
* desired.
*/
timer = nfs_rto_timer(procnum);
if (timer != NFS_DEFAULT_TIMER)
ext.rc_timers = &nmp->nm_timers[timer - 1];
else
ext.rc_timers = NULL;
#ifdef KDTRACE_HOOKS
if (dtrace_nfsclient_nfs23_start_probe != NULL) {
uint32_t probe_id;
int probe_procnum;
if (nmp->nm_flag & NFSMNT_NFSV3) {
probe_id = nfsclient_nfs3_start_probes[procnum];
probe_procnum = procnum;
} else {
probe_id = nfsclient_nfs2_start_probes[procnum];
probe_procnum = nfsv2_procid[procnum];
}
if (probe_id != 0)
(dtrace_nfsclient_nfs23_start_probe)(probe_id, vp,
mreq, cred, probe_procnum);
}
#endif
nfsstats.rpcrequests++;
tryagain:
/*
* This timeout specifies when a new socket should be created,
* along with new xid values. For UDP, this should be done
* infrequently, since retransmits of RPC requests should normally
* use the same xid.
*/
if (nmp->nm_sotype == SOCK_DGRAM) {
if ((nmp->nm_flag & NFSMNT_SOFT) != 0) {
/*
* CLSET_RETRIES is set to 2, so this should be half
* of the total timeout required.
*/
timeo = nmp->nm_retry * nmp->nm_timeo / 2;
if (timeo < 1)
timeo = 1;
timo.tv_sec = timeo / NFS_HZ;
timo.tv_usec = (timeo % NFS_HZ) * 1000000 / NFS_HZ;
} else {
/* For UDP hard mounts, use a large value. */
timo.tv_sec = NFS_MAXTIMEO / NFS_HZ;
timo.tv_usec = 0;
}
} else {
timo.tv_sec = nmp->nm_timeo / NFS_HZ;
timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ;
}
mrep = NULL;
stat = CLNT_CALL_MBUF(nmp->nm_client, &ext,
(nmp->nm_flag & NFSMNT_NFSV3) ? procnum : nfsv2_procid[procnum],
mreq, &mrep, timo);
/*
* If there was a successful reply and a tprintf msg.
* tprintf a response.
*/
if (stat == RPC_SUCCESS)
error = 0;
else if (stat == RPC_TIMEDOUT) {
nfsstats.rpctimeouts++;
error = ETIMEDOUT;
} else if (stat == RPC_VERSMISMATCH) {
nfsstats.rpcinvalid++;
error = EOPNOTSUPP;
} else if (stat == RPC_PROGVERSMISMATCH) {
nfsstats.rpcinvalid++;
error = EPROTONOSUPPORT;
} else if (stat == RPC_INTR) {
error = EINTR;
} else {
nfsstats.rpcinvalid++;
error = EACCES;
}
if (error)
goto nfsmout;
KASSERT(mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
/*
* Search for any mbufs that are not a multiple of 4 bytes long
* or with m_data not longword aligned.
* These could cause pointer alignment problems, so copy them to
* well aligned mbufs.
*/
error = nfs_realign(&mrep, M_NOWAIT);
if (error == ENOMEM) {
m_freem(mrep);
AUTH_DESTROY(auth);
nfsstats.rpcinvalid++;
return (error);
}
md = mrep;
dpos = mtod(mrep, caddr_t);
tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED);
if (*tl != 0) {
error = fxdr_unsigned(int, *tl);
if ((nmp->nm_flag & NFSMNT_NFSV3) &&
error == NFSERR_TRYLATER) {
m_freem(mrep);
error = 0;
waituntil = time_second + nfs3_jukebox_delay;
while (time_second < waituntil)
(void)tsleep(&fake_wchan, PSOCK, "nqnfstry",
hz);
goto tryagain;
}
/*
* Make sure NFSERR_RETERR isn't bogusly set by a server
* such as amd. (No actual NFS error has bit 31 set.)
*/
error &= ~NFSERR_RETERR;
/*
* If the File Handle was stale, invalidate the lookup
* cache, just in case.
*/
if (error == ESTALE)
nfs_purgecache(vp);
/*
* Skip wcc data on non-ENOENT NFS errors for now.
* NetApp filers return corrupt postop attrs in the
* wcc data for NFS err EROFS. Not sure if they could
* return corrupt postop attrs for others errors.
* Blocking ENOENT post-op attributes breaks negative
* name caching, so always allow it through.
*/
if ((nmp->nm_flag & NFSMNT_NFSV3) &&
(!nfs_skip_wcc_data_onerr || error == ENOENT)) {
*mrp = mrep;
*mdp = md;
*dposp = dpos;
error |= NFSERR_RETERR;
} else
m_freem(mrep);
goto nfsmout;
}
/*
* nfs_request - goes something like this
* - fill in request struct
* - links it into list
* - calls nfs_send() for first transmit
* - calls nfs_receive() to get reply
* - break down rpc header and return with nfs reply pointed to
* by mrep or error
* nb: always frees up mreq mbuf list
*/
int
nfs_request(struct vnode *vp, struct mbuf *mreq, int procnum,
struct thread *td, struct ucred *cred, struct mbuf **mrp,
struct mbuf **mdp, caddr_t *dposp)
{
struct mbuf *mrep;
u_int32_t *tl;
struct nfsmount *nmp;
struct mbuf *md;
time_t waituntil;
caddr_t dpos;
int error = 0;
struct timeval now;
AUTH *auth = NULL;
enum nfs_rto_timer_t timer;
struct nfs_feedback_arg nf;
struct rpc_callextra ext;
enum clnt_stat stat;
struct timeval timo;
/* Reject requests while attempting a forced unmount. */
if (vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF) {
m_freem(mreq);
return (ESTALE);
}
nmp = VFSTONFS(vp->v_mount);
bzero(&nf, sizeof(struct nfs_feedback_arg));
nf.nf_mount = nmp;
nf.nf_td = td;
getmicrouptime(&now);
nf.nf_lastmsg = now.tv_sec -
((nmp->nm_tprintf_delay) - (nmp->nm_tprintf_initial_delay));
/*
* XXX if not already connected call nfs_connect now. Longer
* term, change nfs_mount to call nfs_connect unconditionally
* and let clnt_reconnect_create handle reconnects.
*/
if (!nmp->nm_client)
nfs_connect(nmp);
auth = nfs_getauth(nmp, cred);
if (!auth) {
m_freem(mreq);
return (EACCES);
}
bzero(&ext, sizeof(ext));
ext.rc_auth = auth;
ext.rc_feedback = nfs_feedback;
ext.rc_feedback_arg = &nf;
/*
* Use a conservative timeout for RPCs other than getattr,
* lookup, read or write. The justification for doing "other"
* this way is that these RPCs happen so infrequently that
* timer est. would probably be stale. Also, since many of
* these RPCs are non-idempotent, a conservative timeout is
* desired.
*/
timer = nfs_rto_timer(procnum);
if (timer != NFS_DEFAULT_TIMER)
ext.rc_timers = &nmp->nm_timers[timer - 1];
else
ext.rc_timers = NULL;
#ifdef KDTRACE_HOOKS
if (dtrace_nfsclient_nfs23_start_probe != NULL) {
uint32_t probe_id;
int probe_procnum;
if (nmp->nm_flag & NFSMNT_NFSV3) {
probe_id = nfsclient_nfs3_start_probes[procnum];
probe_procnum = procnum;
} else {
probe_id = nfsclient_nfs2_start_probes[procnum];
probe_procnum = nfsv2_procid[procnum];
}
if (probe_id != 0)
(dtrace_nfsclient_nfs23_start_probe)(probe_id, vp,
mreq, cred, probe_procnum);
}
#endif
nfsstats.rpcrequests++;
tryagain:
timo.tv_sec = nmp->nm_timeo / NFS_HZ;
timo.tv_usec = (nmp->nm_timeo * 1000000) / NFS_HZ;
mrep = NULL;
stat = CLNT_CALL_MBUF(nmp->nm_client, &ext,
(nmp->nm_flag & NFSMNT_NFSV3) ? procnum : nfsv2_procid[procnum],
mreq, &mrep, timo);
/*
* If there was a successful reply and a tprintf msg.
* tprintf a response.
*/
if (stat == RPC_SUCCESS)
error = 0;
else if (stat == RPC_TIMEDOUT)
error = ETIMEDOUT;
else if (stat == RPC_VERSMISMATCH)
error = EOPNOTSUPP;
else if (stat == RPC_PROGVERSMISMATCH)
error = EPROTONOSUPPORT;
else
error = EACCES;
if (error)
goto nfsmout;
KASSERT(mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
/*
* Search for any mbufs that are not a multiple of 4 bytes long
* or with m_data not longword aligned.
* These could cause pointer alignment problems, so copy them to
* well aligned mbufs.
*/
error = nfs_realign(&mrep, M_DONTWAIT);
if (error == ENOMEM) {
m_freem(mrep);
AUTH_DESTROY(auth);
return (error);
}
md = mrep;
dpos = mtod(mrep, caddr_t);
tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED);
if (*tl != 0) {
error = fxdr_unsigned(int, *tl);
if ((nmp->nm_flag & NFSMNT_NFSV3) &&
error == NFSERR_TRYLATER) {
m_freem(mrep);
error = 0;
waituntil = time_second + nfs3_jukebox_delay;
while (time_second < waituntil)
(void)tsleep(&fake_wchan, PSOCK, "nqnfstry",
hz);
goto tryagain;
}
/*
* If the File Handle was stale, invalidate the lookup
* cache, just in case.
*/
if (error == ESTALE)
nfs_purgecache(vp);
/*
* Skip wcc data on NFS errors for now. NetApp filers
* return corrupt postop attrs in the wcc data for NFS
* err EROFS. Not sure if they could return corrupt
* postop attrs for others errors.
*/
if ((nmp->nm_flag & NFSMNT_NFSV3) &&
!nfs_skip_wcc_data_onerr) {
*mrp = mrep;
*mdp = md;
*dposp = dpos;
error |= NFSERR_RETERR;
} else
m_freem(mrep);
goto nfsmout;
}
static void
test_client(int argc, const char **argv)
{
rpcproc_t prog = 123456;
rpcvers_t vers = 1;
const char *netid = "tcp";
char hostname[128], service[128+5];
CLIENT *client;
AUTH *auth;
const char **mechs;
rpc_gss_options_req_t options_req;
rpc_gss_options_ret_t options_ret;
rpc_gss_service_t svc;
struct timeval tv;
enum clnt_stat stat;
if (argc == 2)
strlcpy(hostname, argv[1], sizeof(hostname));
else
gethostname(hostname, sizeof(hostname));
client = clnt_create(hostname, prog, vers, netid);
if (!client) {
printf("rpc_createerr.cf_stat = %d\n",
rpc_createerr.cf_stat);
printf("rpc_createerr.cf_error.re_errno = %d\n",
rpc_createerr.cf_error.re_errno);
return;
}
strcpy(service, "host");
strcat(service, "@");
strcat(service, hostname);
mechs = rpc_gss_get_mechanisms();
auth = NULL;
while (*mechs) {
options_req.req_flags = GSS_C_MUTUAL_FLAG;
options_req.time_req = 600;
options_req.my_cred = GSS_C_NO_CREDENTIAL;
options_req.input_channel_bindings = NULL;
auth = rpc_gss_seccreate(client, service,
*mechs,
rpc_gss_svc_none,
NULL,
&options_req,
&options_ret);
if (auth)
break;
mechs++;
}
if (!auth) {
clnt_pcreateerror("rpc_gss_seccreate");
printf("Can't authenticate with server %s.\n",
hostname);
exit(1);
}
client->cl_auth = auth;
for (svc = rpc_gss_svc_none; svc <= rpc_gss_svc_privacy; svc++) {
const char *svc_names[] = {
"rpc_gss_svc_default",
"rpc_gss_svc_none",
"rpc_gss_svc_integrity",
"rpc_gss_svc_privacy"
};
int num;
rpc_gss_set_defaults(auth, svc, NULL);
tv.tv_sec = 5;
tv.tv_usec = 0;
num = 42;
stat = CLNT_CALL(client, 1,
(xdrproc_t) xdr_int, (char *) &num,
(xdrproc_t) xdr_int, (char *) &num, tv);
if (stat == RPC_SUCCESS) {
printf("succeeded with %s\n", svc_names[svc]);
if (num != 142)
printf("unexpected reply %d\n", num);
} else {
clnt_perror(client, "call failed");
}
}
AUTH_DESTROY(auth);
CLNT_DESTROY(client);
}