#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#ifdef HAVE_LIBWRAP
#include <tcpwrapper.h>
#include <unistd.h>
#include <string.h>
#include <sys/signal.h>
#include <sys/queue.h>
#include <sys/stat.h>
-#include <unistd.h>
+#include <tcpd.h>
#include "xlog.h"
static void logit(int severity, struct sockaddr_in *addr,
u_long procnum, u_long prognum, char *text);
-static void toggle_verboselog(int sig);
static int check_files(void);
+/*
+ * These need to exist since they are externed
+ * public header files.
+ */
int verboselog = 0;
int allow_severity = LOG_INFO;
int deny_severity = LOG_WARNING;
-/* A handful of macros for "readability". */
-
-#ifdef HAVE_LIBWRAP
-/* coming from libwrap.a (tcp_wrappers) */
-extern int hosts_ctl(char *daemon, char *name, char *addr, char *user);
-#else
-int hosts_ctl(char *daemon, char *name, char *addr, char *user)
-{
- return 0;
-}
-#endif
-
-#define legal_port(a,p) \
- (ntohs((a)->sin_port) < IPPORT_RESERVED || (p) >= IPPORT_RESERVED)
-
-#define log_bad_port(addr, proc, prog) \
- logit(deny_severity, addr, proc, prog, ": request from unprivileged port")
-
#define log_bad_host(addr, proc, prog) \
- logit(deny_severity, addr, proc, prog, ": request from unauthorized host")
-
-#define log_bad_owner(addr, proc, prog) \
- logit(deny_severity, addr, proc, prog, ": request from non-local host")
-
-#define log_no_forward(addr, proc, prog) \
- logit(deny_severity, addr, proc, prog, ": request not forwarded")
-
-#define log_client(addr, proc, prog) \
- logit(allow_severity, addr, proc, prog, "")
+ logit(deny_severity, addr, proc, prog, "request from unauthorized host")
#define ALLOW 1
#define DENY 0
char *daemon;
struct sockaddr_in *addr;
{
- struct hostent *hp;
- char **sp;
- char *tmpname;
-
- /* First check the address. */
- if (hosts_ctl(daemon, "", inet_ntoa(addr->sin_addr), "") == DENY)
- return DENY;
-
- /* Now do the hostname lookup */
- hp = gethostbyaddr ((const char *) &(addr->sin_addr),
- sizeof (addr->sin_addr), AF_INET);
- if (!hp) {
- xlog(L_WARNING,
- "Warning: Client IP address '%s' not found in host lookup",
- inet_ntoa(addr->sin_addr));
- return DENY; /* never heard of it. misconfigured DNS? */
- }
-
- /* Make sure the hostent is authorative. */
- tmpname = strdup(hp->h_name);
- if (!tmpname) {
- xlog(L_WARNING, "Warning: No memory for Host access check");
- return DENY;
- }
- hp = gethostbyname(tmpname);
- if (!hp) {
- xlog(L_WARNING,
- "Warning: Client hostname '%s' not found in host lookup", tmpname);
- free(tmpname);
- return DENY; /* never heard of it. misconfigured DNS? */
- }
- free(tmpname);
-
- /* Now make sure the address is on the list */
- for (sp = hp->h_addr_list ; *sp ; sp++) {
- if (memcmp(*sp, &(addr->sin_addr), hp->h_length) == 0)
- break;
- }
- if (!*sp)
- return DENY; /* it was a FAKE. */
-
- /* Check the official name and address. */
- if (hosts_ctl(daemon, hp->h_name, inet_ntoa(addr->sin_addr), "") == DENY)
- return DENY;
+ struct request_info req;
- /* Now check aliases. */
- for (sp = hp->h_aliases; *sp ; sp++) {
- if (hosts_ctl(daemon, *sp, inet_ntoa(addr->sin_addr), "") == DENY)
- return DENY;
- }
-
- return ALLOW;
-}
+ request_init(&req, RQ_DAEMON, daemon, RQ_CLIENT_SIN, addr, 0);
+ sock_methods(&req);
-/* check_startup - additional startup code */
-
-void check_startup(void)
-{
+ if (hosts_access(&req))
+ return ALLOW;
- /*
- * Give up root privileges so that we can never allocate a privileged
- * port when forwarding an rpc request.
- *
- * Fix 8/3/00 Philipp Knirsch: First lookup our rpc user. If we find it,
- * switch to that uid, otherwise simply resue the old bin user and print
- * out a warning in syslog.
- */
-
- struct passwd *pwent;
-
- pwent = getpwnam("rpc");
- if (pwent == NULL) {
- syslog(LOG_WARNING, "user rpc not found, reverting to user bin");
- if (setuid(1) == -1) {
- syslog(LOG_ERR, "setuid(1) failed: %m");
- exit(1);
- }
- }
- else {
- if (setuid(pwent->pw_uid) == -1) {
- syslog(LOG_WARNING, "setuid() to rpc user failed: %m");
- if (setuid(1) == -1) {
- syslog(LOG_ERR, "setuid(1) failed: %m");
- exit(1);
- }
- }
- }
-
- (void) signal(SIGINT, toggle_verboselog);
+ return DENY;
}
/* check_files - check to see if either access files have changed */
if (acc && changed == 0)
return (acc->access);
- if (!(from_local(addr) || good_client(daemon, addr))) {
+ if (!(from_local((struct sockaddr *)addr) || good_client(daemon, addr))) {
log_bad_host(addr, proc, prog);
if (acc)
acc->access = FALSE;
haccess_add(addr, prog, FALSE);
return (FALSE);
}
- if (verboselog)
- log_client(addr, proc, prog);
if (acc)
acc->access = TRUE;
else
haccess_add(addr, prog, TRUE);
- return (TRUE);
-}
-/* check_privileged_port - additional checks for privileged-port updates */
-int
-check_privileged_port(struct sockaddr_in *addr,
- u_long proc, u_long prog, u_long port)
-{
-#ifdef CHECK_PORT
- if (!legal_port(addr, port)) {
- log_bad_port(addr, proc, prog);
- return (FALSE);
- }
-#endif
return (TRUE);
}
-/* toggle_verboselog - toggle verbose logging flag */
-
-static void toggle_verboselog(int sig)
-{
- (void) signal(sig, toggle_verboselog);
- verboselog = !verboselog;
-}
-
/* logit - report events of interest via the syslog daemon */
static void logit(int severity, struct sockaddr_in *addr,
u_long procnum, u_long prognum, char *text)
{
- char *procname;
- char procbuf[16 + 4 * sizeof(u_long)];
- char *progname;
- char progbuf[16 + 4 * sizeof(u_long)];
- struct rpcent *rpc;
-
- /*
- * Fork off a process or the portmap daemon might hang while
- * getrpcbynumber() or syslog() does its thing.
- *
- * Don't forget to wait for the children, too...
- */
-
- if (fork() == 0) {
-
- /* Try to map program number to name. */
-
- if (prognum == 0) {
- progname = "";
- } else if ((rpc = getrpcbynumber((int) prognum))) {
- progname = rpc->r_name;
- } else {
- snprintf(progname = progbuf, sizeof (progbuf),
- "prog (%lu)", prognum);
- }
-
- /* Try to map procedure number to name. */
-
- snprintf(procname = procbuf, sizeof (procbuf),
- "proc (%lu)", (u_long) procnum);
-
- /* Write syslog record. */
-
- syslog(severity, "connect from %s to %s in %s%s",
- inet_ntoa(addr->sin_addr), procname, progname, text);
- exit(0);
- }
+ syslog(severity, "connect from %s denied: %s",
+ inet_ntoa(addr->sin_addr), text);
}
+#endif
projects / nfs-utils.git / blobdiff