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#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <rpc/xdr.h>
#include <rpc/rpc_msg.h>
#include <rpc/pmap_prot.h>
#include <rpcsvc/yp_prot.h>
#include <errno.h>
#include <poll.h>
#include <time.h>
#include <dirsrv/slapi-plugin.h>
#include "portmap.h"
#ifdef PORTMAP_MAIN
#include <stdarg.h>
#include <unistd.h>
int slapi_log_error(int i, char *f, char *fmt, ...)
{
va_list va;
va_start(va, fmt);
vfprintf(stderr, fmt, va);
va_end(va);
return 0;
}
int
main(int argc, char **argv)
{
int s;
struct sockaddr_in sin;
s = socket(PF_INET, SOCK_DGRAM, 0);
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
if (bindresvport(s, &sin) != 0) {
printf("error binding to reserved port\n");
}
setreuid(2510, 2510);
portmap_unregister(s, YPPROG, YPVERS);
portmap_register(s, YPPROG, YPVERS, IPPROTO_UDP,
ntohs(sin.sin_port));
return 0;
}
#endif
static bool_t
portmap_register_work(int resv_sock,
int program, int version, int protocol, int port,
int proc)
{
char portmap_buf[4000], auth_buf[4000], reply_buf[8000];
int portmap_length, reply_length;
AUTH *auth;
XDR portmap_xdrs, auth_xdrs;
struct rpc_msg msg;
struct pmap map;
bool_t ret;
struct sockaddr addr;
struct sockaddr_in addr4;
union {
struct sockaddr_in addr4;
} client_addr;
socklen_t client_addrlen;
struct pollfd pollfd;
int i;
static u_long xid;
memset(&addr, 0, sizeof(addr));
memset(&addr4, 0, sizeof(addr4));
addr.sa_family = AF_UNSPEC;
addr4.sin_family = AF_INET;
addr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addr4.sin_port = htons(PMAPPORT);
memset(&msg, 0, sizeof(msg));
msg.rm_xid = xid = (time(NULL) ^ port ^ protocol ^ proc);
msg.rm_direction = CALL;
msg.rm_call.cb_rpcvers = 2;
msg.rm_call.cb_prog = PMAPPROG;
msg.rm_call.cb_vers = PMAPVERS;
msg.rm_call.cb_proc = proc;
xdrmem_create(&auth_xdrs, auth_buf, sizeof(auth_buf), XDR_ENCODE);
auth = authnone_create();
auth_marshall(auth, &auth_xdrs);
msg.rm_call.cb_cred = auth->ah_cred;
msg.rm_call.cb_verf = auth->ah_verf;
map.pm_prog = program;
map.pm_vers = version;
map.pm_prot = protocol;
map.pm_port = port;
xdrmem_create(&portmap_xdrs, portmap_buf, sizeof(portmap_buf),
XDR_ENCODE);
xdr_callmsg(&portmap_xdrs, &msg);
xdr_pmap(&portmap_xdrs, &map);
portmap_length = xdr_getpos(&portmap_xdrs);
auth_destroy(auth);
xdr_destroy(&auth_xdrs);
xdr_destroy(&portmap_xdrs);
memset(&portmap_xdrs, 0, sizeof(portmap_xdrs));
client_addrlen = 0;
connect(resv_sock, (struct sockaddr*) &addr4, sizeof(addr4));
for (i = 1; i < 32; i *= 2) {
if (send(resv_sock, &portmap_buf, portmap_length,
0) != portmap_length) {
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"error sending request to portmap\n");
continue;
}
pollfd.fd = resv_sock;
pollfd.events = POLLIN | POLLERR;
if ((poll(&pollfd, 1, i * 1000) > 0) &&
(pollfd.revents & POLLIN)) {
client_addrlen = sizeof(client_addr);
reply_length = recvfrom(resv_sock,
reply_buf, sizeof(reply_buf), 0,
(struct sockaddr *)&client_addr,
&client_addrlen);
if (reply_length > 0) {
memset(&msg, 0, sizeof(msg));
xdrmem_create(&portmap_xdrs,
reply_buf, reply_length,
XDR_DECODE);
msg.rm_reply.rp_acpt.ar_results.where = (caddr_t) &ret;
msg.rm_reply.rp_acpt.ar_results.proc = (xdrproc_t) xdr_bool;
if (xdr_replymsg(&portmap_xdrs, &msg)) {
if ((msg.rm_direction == REPLY) &&
(msg.rm_xid == xid)) {
xdr_destroy(&portmap_xdrs);
break;
}
}
xdr_destroy(&portmap_xdrs);
memset(&portmap_xdrs, 0, sizeof(portmap_xdrs));
}
}
}
connect(resv_sock, &addr, sizeof(addr));
if (i == 32) {
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"timeout registering with portmap service\n");
return FALSE;
}
if (msg.rm_reply.rp_stat != MSG_ACCEPTED) {
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"portmap request not accepted\n");
switch (msg.rm_reply.rp_rjct.rj_stat) {
const char *auth_status;
case AUTH_ERROR:
switch (msg.rm_reply.rp_rjct.rj_why) {
case AUTH_OK:
auth_status = "ok";
break;
case AUTH_BADCRED:
auth_status = "bad credentials";
break;
case AUTH_REJECTEDCRED:
auth_status = "rejected credentials";
break;
case AUTH_BADVERF:
auth_status = "bad verifier";
break;
case AUTH_REJECTEDVERF:
auth_status = "rejected verifier";
break;
case AUTH_TOOWEAK:
auth_status = "too weak";
break;
case AUTH_INVALIDRESP:
auth_status = "invalid response";
break;
case AUTH_FAILED:
default:
auth_status = "unknown error";
break;
}
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"portmap request rejected: "
"authentication failed: %s\n",
auth_status);
break;
case RPC_MISMATCH:
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"portmap request rejected: "
"RPC mismatch\n");
break;
}
return FALSE;
xdr_destroy(&portmap_xdrs);
}
auth = authunix_create_default();
if (auth_validate(auth, &msg.rm_reply.rp_acpt.ar_verf)) {
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"portmap reply authenticated\n");
} else {
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"portmap reply failed authentication\n");
}
auth_destroy(auth);
if (msg.rm_reply.rp_acpt.ar_stat != SUCCESS) {
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"portmap request not processed\n");
xdr_destroy(&portmap_xdrs);
return FALSE;
}
if (ret) {
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"portmap request succeeded\n");
} else {
slapi_log_error(SLAPI_LOG_PLUGIN, "XXX",
"portmap response did not include a reply\n");
}
xdr_destroy(&portmap_xdrs);
return ret;
}
bool_t
portmap_register(int resv_sock,
int program, int version, int protocol, int port)
{
return portmap_register_work(resv_sock, program, version,
protocol, port, PMAPPROC_SET);
}
bool_t
portmap_unregister(int resv_sock, int program, int version)
{
return portmap_register_work(resv_sock, program, version,
0, 0, PMAPPROC_UNSET);
}
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