RPCBIND(3)

RPCBIND(3) | Library Functions Manual | RPCBIND(3)

# NAME

`rpcb_getmaps`, `rpcb_getaddr`, `rpcb_gettime`, `rpcb_rmtcall`, `rpcb_set`, `rpcb_unset` —
library routines for RPC bind service

# LIBRARY

Standard C Library (libc, -lc)

# SYNOPSIS

`#include <rpc/rpc.h>`

struct rpcblist *
`rpcb_getmaps`(const struct netconfig *netconf, const char *host);

bool_t
`rpcb_getaddr`(const rpcprog_t prognum, const rpcvers_t versnum, const struct netconfig *netconf, struct netbuf *svcaddr, const char *host);

bool_t
`rpcb_gettime`(const char *host, time_t * timep);

enum clnt_stat
`rpcb_rmtcall`(const struct netconfig *netconf, const char *host, const rpcprog_t prognum, const rpcvers_t versnum, const rpcproc_t procnum, const xdrproc_t inproc, const char *in, const xdrproc_t outproc, caddr_t out, const struct timeval tout, struct netbuf *svcaddr);

bool_t
`rpcb_set`(const rpcprog_t prognum, const rpcvers_t versnum, const struct netconfig *netconf, const struct netbuf *svcaddr);

bool_t
`rpcb_unset`(const rpcprog_t prognum, const rpcvers_t versnum, const struct netconfig *netconf);

# DESCRIPTION

These routines allow client C programs to make procedure calls to the RPC binder service. (see rpcbind(8)) maintains a list of mappings between programs and their universal addresses.

# ROUTINES

`rpcb_getmaps`()
  An interface to the rpcbind service, which returns a list of the current RPC program-to-address mappings on host. It uses the transport specified through netconf to contact the remote rpcbind service on host. This routine will return `NULL`, if the remote rpcbind could not be contacted.
`rpcb_getaddr`()
  An interface to the rpcbind service, which finds the address of the service on host that is registered with program number prognum, version versnum, and speaks the transport protocol associated with netconf. The address found is returned in svcaddr. svcaddr should be preallocated. This routine returns `TRUE` if it succeeds. A return value of `FALSE` means that the mapping does not exist or that the RPC system failed to contact the remote rpcbind service. In the latter case, the global variable rpc_createerr (see rpc_clnt_create(3) contains the RPC status.
`rpcb_gettime`()
  This routine returns the time on host in timep. If host is `NULL`, `rpcb_gettime`() returns the time on its own machine. This routine returns `TRUE` if it succeeds, `FALSE` if it fails. `rpcb_gettime`() can be used to synchronize the time between the client and the remote server.
`rpcb_rmtcall`()
  An interface to the rpcbind service, which instructs rpcbind on host to make an RPC call on your behalf to a procedure on that host. The `netconfig`() structure should correspond to a connectionless transport. The parameter svcaddr will be modified to the server's address if the procedure succeeds (see `rpc_call`() and `clnt_call`() in rpc_clnt_calls(3) for the definitions of other parameters).

  This procedure should normally be used for a ``ping'' and nothing else. This routine allows programs to do lookup and call, all in one step.

  Note: Even if the server is not running `rpcb_rmtcall`() does not return any error messages to the caller. In such a case, the caller times out.

  Note: `rpcb_rmtcall`() is only available for connectionless transports.

`rpcb_set`()
  An interface to the rpcbind service, which establishes a mapping between the triple [ prognum, versnum, netconf->nc_netid] and svcaddr on the machine's rpcbind service. The value of nc_netid must correspond to a network identifier that is defined by the netconfig database. This routine returns `TRUE` if it succeeds, `FALSE` otherwise. (See also `svc_reg`() in rpc_svc_calls(3). If there already exists such an entry with rpcbind, `rpcb_set`() will fail.
`rpcb_unset`()
  An interface to the rpcbind service, which destroys the mapping between the triple [ prognum, versnum, netconf->nc_netid] and the address on the machine's rpcbind service. If netconf is `NULL`, `rpcb_unset`() destroys all mapping between the triple [ prognum, versnum, all-transports] and the addresses on the machine's rpcbind service. This routine returns `TRUE` if it succeeds, `FALSE` otherwise. Only the owner of the service or the super-user can destroy the mapping. (See also `svc_unreg`() in rpc_svc_calls(3).

# SEE ALSO

rpc_clnt_calls(3), rpc_svc_calls(3), rpcbind(8), rpcinfo(8)

December 4, 2005 | NetBSD 9.3