[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/inet/rcmd.c b/ap/libc/glibc/glibc-2.23/inet/rcmd.c
new file mode 100644
index 0000000..ace6b14
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/inet/rcmd.c
@@ -0,0 +1,826 @@
+/*
+ * Copyright (C) 1998 WIDE Project.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/*
+ * Copyright (c) 1983, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rcmd.c 8.3 (Berkeley) 3/26/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <sys/poll.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <alloca.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <ctype.h>
+#include <string.h>
+#include <libintl.h>
+#include <stdlib.h>
+#include <wchar.h>
+#include <sys/uio.h>
+
+
+int __ivaliduser (FILE *, u_int32_t, const char *, const char *);
+static int __validuser2_sa (FILE *, struct sockaddr *, size_t,
+ const char *, const char *, const char *);
+static int ruserok2_sa (struct sockaddr *ra, size_t ralen,
+ int superuser, const char *ruser,
+ const char *luser, const char *rhost);
+static int ruserok_sa (struct sockaddr *ra, size_t ralen,
+ int superuser, const char *ruser,
+ const char *luser);
+int iruserok_af (const void *raddr, int superuser, const char *ruser,
+ const char *luser, sa_family_t af);
+int iruserok (u_int32_t raddr, int superuser, const char *ruser,
+ const char *luser);
+
+libc_hidden_proto (iruserok_af)
+
+libc_freeres_ptr(static char *ahostbuf);
+
+int
+rcmd_af (char **ahost, u_short rport, const char *locuser, const char *remuser,
+ const char *cmd, int *fd2p, sa_family_t af)
+{
+ char paddr[INET6_ADDRSTRLEN];
+ struct addrinfo hints, *res, *ai;
+ union
+ {
+ struct sockaddr sa;
+ struct sockaddr_storage ss;
+ struct sockaddr_in sin;
+ struct sockaddr_in6 sin6;
+ } from;
+ struct pollfd pfd[2];
+ int32_t oldmask;
+ pid_t pid;
+ int s, lport, timo, error;
+ char c;
+ int refused;
+ char num[8];
+ ssize_t n;
+
+ if (af != AF_INET && af != AF_INET6 && af != AF_UNSPEC)
+ {
+ __set_errno (EAFNOSUPPORT);
+ return -1;
+ }
+
+ pid = __getpid();
+
+ memset(&hints, '\0', sizeof(hints));
+ hints.ai_flags = AI_CANONNAME;
+ hints.ai_family = af;
+ hints.ai_socktype = SOCK_STREAM;
+ (void)__snprintf(num, sizeof(num), "%d", ntohs(rport));
+ error = getaddrinfo(*ahost, num, &hints, &res);
+ if (error) {
+ if (error == EAI_NONAME && *ahost != NULL)
+ __fxprintf(NULL, "%s: Unknown host\n", *ahost);
+ else
+ __fxprintf(NULL, "rcmd: getaddrinfo: %s\n",
+ gai_strerror(error));
+
+ return -1;
+ }
+
+ pfd[0].events = POLLIN;
+ pfd[1].events = POLLIN;
+
+ if (res->ai_canonname){
+ free (ahostbuf);
+ ahostbuf = strdup (res->ai_canonname);
+ if (ahostbuf == NULL) {
+ __fxprintf(NULL, "%s",
+ _("rcmd: Cannot allocate memory\n"));
+ return -1;
+ }
+ *ahost = ahostbuf;
+ } else
+ *ahost = NULL;
+ ai = res;
+ refused = 0;
+ oldmask = __sigblock(sigmask(SIGURG));
+ for (timo = 1, lport = IPPORT_RESERVED - 1;;) {
+ char errbuf[200];
+
+ s = rresvport_af(&lport, ai->ai_family);
+ if (s < 0) {
+ if (errno == EAGAIN)
+ __fxprintf(NULL, "%s", _("\
+rcmd: socket: All ports in use\n"));
+ else
+ __fxprintf(NULL, "rcmd: socket: %m\n");
+
+ __sigsetmask(oldmask);
+ freeaddrinfo(res);
+ return -1;
+ }
+ __fcntl(s, F_SETOWN, pid);
+ if (__connect(s, ai->ai_addr, ai->ai_addrlen) >= 0)
+ break;
+ (void)__close(s);
+ if (errno == EADDRINUSE) {
+ lport--;
+ continue;
+ }
+ if (errno == ECONNREFUSED)
+ refused = 1;
+ if (ai->ai_next != NULL) {
+ int oerrno = errno;
+ char *buf = NULL;
+
+ getnameinfo(ai->ai_addr, ai->ai_addrlen,
+ paddr, sizeof(paddr),
+ NULL, 0,
+ NI_NUMERICHOST);
+
+ if (__asprintf (&buf, _("connect to address %s: "),
+ paddr) >= 0)
+ {
+ __fxprintf(NULL, "%s", buf);
+ free (buf);
+ }
+ __set_errno (oerrno);
+ perror(0);
+ ai = ai->ai_next;
+ getnameinfo(ai->ai_addr, ai->ai_addrlen,
+ paddr, sizeof(paddr),
+ NULL, 0,
+ NI_NUMERICHOST);
+ if (__asprintf (&buf, _("Trying %s...\n"), paddr) >= 0)
+ {
+ __fxprintf (NULL, "%s", buf);
+ free (buf);
+ }
+ continue;
+ }
+ if (refused && timo <= 16) {
+ (void)__sleep(timo);
+ timo *= 2;
+ ai = res;
+ refused = 0;
+ continue;
+ }
+ freeaddrinfo(res);
+ (void)__fxprintf(NULL, "%s: %s\n", *ahost,
+ __strerror_r(errno, errbuf, sizeof (errbuf)));
+ __sigsetmask(oldmask);
+ return -1;
+ }
+ lport--;
+ if (fd2p == 0) {
+ __write(s, "", 1);
+ lport = 0;
+ } else {
+ char num[8];
+ int s2 = rresvport_af(&lport, ai->ai_family), s3;
+ socklen_t len = ai->ai_addrlen;
+
+ if (s2 < 0)
+ goto bad;
+ __listen(s2, 1);
+ (void)__snprintf(num, sizeof(num), "%d", lport);
+ if (__write(s, num, strlen(num)+1) != (ssize_t)strlen(num)+1) {
+ char *buf = NULL;
+
+ if (__asprintf (&buf, _("\
+rcmd: write (setting up stderr): %m\n")) >= 0)
+ {
+ __fxprintf(NULL, "%s", buf);
+ free (buf);
+ }
+ (void)__close(s2);
+ goto bad;
+ }
+ pfd[0].fd = s;
+ pfd[1].fd = s2;
+ __set_errno (0);
+ if (__poll (pfd, 2, -1) < 1 || (pfd[1].revents & POLLIN) == 0){
+ char *buf = NULL;
+
+ if ((errno != 0
+ && __asprintf(&buf, _("\
+rcmd: poll (setting up stderr): %m\n")) >= 0)
+ || (errno == 0
+ && __asprintf(&buf, _("\
+poll: protocol failure in circuit setup\n")) >= 0))
+ {
+ __fxprintf (NULL, "%s", buf);
+ free (buf);
+ }
+ (void)__close(s2);
+ goto bad;
+ }
+ s3 = TEMP_FAILURE_RETRY (accept(s2, &from.sa, &len));
+ switch (from.sa.sa_family) {
+ case AF_INET:
+ rport = ntohs(from.sin.sin_port);
+ break;
+ case AF_INET6:
+ rport = ntohs(from.sin6.sin6_port);
+ break;
+ default:
+ rport = 0;
+ break;
+ }
+ (void)__close(s2);
+ if (s3 < 0) {
+ (void)__fxprintf(NULL, "rcmd: accept: %m\n");
+ lport = 0;
+ goto bad;
+ }
+ *fd2p = s3;
+
+ if (rport >= IPPORT_RESERVED || rport < IPPORT_RESERVED / 2){
+ char *buf = NULL;
+
+ if (__asprintf(&buf, _("\
+socket: protocol failure in circuit setup\n")) >= 0)
+ {
+ __fxprintf (NULL, "%s", buf);
+ free (buf);
+ }
+ goto bad2;
+ }
+ }
+ struct iovec iov[3] =
+ {
+ [0] = { .iov_base = (void *) locuser,
+ .iov_len = strlen (locuser) + 1 },
+ [1] = { .iov_base = (void *) remuser,
+ .iov_len = strlen (remuser) + 1 },
+ [2] = { .iov_base = (void *) cmd,
+ .iov_len = strlen (cmd) + 1 }
+ };
+ (void) TEMP_FAILURE_RETRY (__writev (s, iov, 3));
+ n = TEMP_FAILURE_RETRY (__read(s, &c, 1));
+ if (n != 1) {
+ char *buf = NULL;
+
+ if ((n == 0
+ && __asprintf(&buf, _("rcmd: %s: short read"),
+ *ahost) >= 0)
+ || (n != 0
+ && __asprintf(&buf, "rcmd: %s: %m\n", *ahost) >= 0))
+ {
+ __fxprintf (NULL, "%s", buf);
+ free (buf);
+ }
+ goto bad2;
+ }
+ if (c != 0) {
+ while (__read(s, &c, 1) == 1) {
+ (void)__write(STDERR_FILENO, &c, 1);
+ if (c == '\n')
+ break;
+ }
+ goto bad2;
+ }
+ __sigsetmask(oldmask);
+ freeaddrinfo(res);
+ return s;
+bad2:
+ if (lport)
+ (void)__close(*fd2p);
+bad:
+ (void)__close(s);
+ __sigsetmask(oldmask);
+ freeaddrinfo(res);
+ return -1;
+}
+libc_hidden_def (rcmd_af)
+
+int
+rcmd (char **ahost, u_short rport, const char *locuser, const char *remuser,
+ const char *cmd, int *fd2p)
+{
+ return rcmd_af (ahost, rport, locuser, remuser, cmd, fd2p, AF_INET);
+}
+
+int
+rresvport_af (int *alport, sa_family_t family)
+{
+ union {
+ struct sockaddr generic;
+ struct sockaddr_in in;
+ struct sockaddr_in6 in6;
+ } ss;
+ int s;
+ size_t len;
+ uint16_t *sport;
+
+ switch(family){
+ case AF_INET:
+ len = sizeof(struct sockaddr_in);
+ sport = &ss.in.sin_port;
+ break;
+ case AF_INET6:
+ len = sizeof(struct sockaddr_in6);
+ sport = &ss.in6.sin6_port;
+ break;
+ default:
+ __set_errno (EAFNOSUPPORT);
+ return -1;
+ }
+ s = __socket(family, SOCK_STREAM, 0);
+ if (s < 0)
+ return -1;
+
+ memset (&ss, '\0', sizeof(ss));
+#ifdef SALEN
+ ss.generic.__ss_len = len;
+#endif
+ ss.generic.sa_family = family;
+
+ /* Ignore invalid values. */
+ if (*alport < IPPORT_RESERVED / 2)
+ *alport = IPPORT_RESERVED / 2;
+ else if (*alport >= IPPORT_RESERVED)
+ *alport = IPPORT_RESERVED - 1;
+
+ int start = *alport;
+ do {
+ *sport = htons((uint16_t) *alport);
+ if (__bind(s, &ss.generic, len) >= 0)
+ return s;
+ if (errno != EADDRINUSE) {
+ (void)__close(s);
+ return -1;
+ }
+ if ((*alport)-- == IPPORT_RESERVED/2)
+ *alport = IPPORT_RESERVED - 1;
+ } while (*alport != start);
+ (void)__close(s);
+ __set_errno (EAGAIN);
+ return -1;
+}
+libc_hidden_def (rresvport_af)
+
+int
+rresvport (int *alport)
+{
+ return rresvport_af(alport, AF_INET);
+}
+
+int __check_rhosts_file = 1;
+char *__rcmd_errstr;
+
+int
+ruserok_af (const char *rhost, int superuser, const char *ruser,
+ const char *luser, sa_family_t af)
+{
+ struct addrinfo hints, *res, *res0;
+ int gai;
+ int ret;
+
+ memset (&hints, '\0', sizeof(hints));
+ hints.ai_family = af;
+ gai = getaddrinfo(rhost, NULL, &hints, &res0);
+ if (gai)
+ return -1;
+ ret = -1;
+ for (res=res0; res; res=res->ai_next)
+ if (ruserok2_sa(res->ai_addr, res->ai_addrlen,
+ superuser, ruser, luser, rhost) == 0){
+ ret = 0;
+ break;
+ }
+ freeaddrinfo(res0);
+ return (ret);
+}
+libc_hidden_def (ruserok_af)
+
+int
+ruserok (const char *rhost, int superuser, const char *ruser,
+ const char *luser)
+{
+ return ruserok_af(rhost, superuser, ruser, luser, AF_INET);
+}
+
+/* Extremely paranoid file open function. */
+static FILE *
+iruserfopen (const char *file, uid_t okuser)
+{
+ struct stat64 st;
+ char *cp = NULL;
+ FILE *res = NULL;
+
+ /* If not a regular file, if owned by someone other than user or
+ root, if writeable by anyone but the owner, or if hardlinked
+ anywhere, quit. */
+ if (__lxstat64 (_STAT_VER, file, &st))
+ cp = _("lstat failed");
+ else if (!S_ISREG (st.st_mode))
+ cp = _("not regular file");
+ else
+ {
+ res = fopen (file, "rce");
+ if (!res)
+ cp = _("cannot open");
+ else if (__fxstat64 (_STAT_VER, fileno (res), &st) < 0)
+ cp = _("fstat failed");
+ else if (st.st_uid && st.st_uid != okuser)
+ cp = _("bad owner");
+ else if (st.st_mode & (S_IWGRP|S_IWOTH))
+ cp = _("writeable by other than owner");
+ else if (st.st_nlink > 1)
+ cp = _("hard linked somewhere");
+ }
+
+ /* If there were any problems, quit. */
+ if (cp != NULL)
+ {
+ __rcmd_errstr = cp;
+ if (res)
+ fclose (res);
+ return NULL;
+ }
+
+ /* No threads use this stream. */
+ __fsetlocking (res, FSETLOCKING_BYCALLER);
+
+ return res;
+}
+
+/*
+ * New .rhosts strategy: We are passed an ip address. We spin through
+ * hosts.equiv and .rhosts looking for a match. When the .rhosts only
+ * has ip addresses, we don't have to trust a nameserver. When it
+ * contains hostnames, we spin through the list of addresses the nameserver
+ * gives us and look for a match.
+ *
+ * Returns 0 if ok, -1 if not ok.
+ */
+static int
+ruserok2_sa (struct sockaddr *ra, size_t ralen, int superuser,
+ const char *ruser, const char *luser, const char *rhost)
+{
+ FILE *hostf = NULL;
+ int isbad = -1;
+
+ if (!superuser)
+ hostf = iruserfopen (_PATH_HEQUIV, 0);
+
+ if (hostf)
+ {
+ isbad = __validuser2_sa (hostf, ra, ralen, luser, ruser, rhost);
+ fclose (hostf);
+
+ if (!isbad)
+ return 0;
+ }
+
+ if (__check_rhosts_file || superuser)
+ {
+ char *pbuf;
+ struct passwd pwdbuf, *pwd;
+ size_t dirlen;
+ size_t buflen = __sysconf (_SC_GETPW_R_SIZE_MAX);
+ char *buffer = __alloca (buflen);
+ uid_t uid;
+
+ if (__getpwnam_r (luser, &pwdbuf, buffer, buflen, &pwd) != 0
+ || pwd == NULL)
+ return -1;
+
+ dirlen = strlen (pwd->pw_dir);
+ pbuf = alloca (dirlen + sizeof "/.rhosts");
+ __mempcpy (__mempcpy (pbuf, pwd->pw_dir, dirlen),
+ "/.rhosts", sizeof "/.rhosts");
+
+ /* Change effective uid while reading .rhosts. If root and
+ reading an NFS mounted file system, can't read files that
+ are protected read/write owner only. */
+ uid = __geteuid ();
+ seteuid (pwd->pw_uid);
+ hostf = iruserfopen (pbuf, pwd->pw_uid);
+
+ if (hostf != NULL)
+ {
+ isbad = __validuser2_sa (hostf, ra, ralen, luser, ruser, rhost);
+ fclose (hostf);
+ }
+
+ seteuid (uid);
+ return isbad;
+ }
+ return -1;
+}
+/*
+ * ruserok_sa() is now discussed on ipng, so
+ * currently disabled for external use
+ */
+static int
+ruserok_sa (struct sockaddr *ra, size_t ralen, int superuser,
+ const char *ruser, const char *luser)
+{
+ return ruserok2_sa(ra, ralen, superuser, ruser, luser, "-");
+}
+
+/* This is the exported version. */
+int
+iruserok_af (const void *raddr, int superuser, const char *ruser,
+ const char *luser, sa_family_t af)
+{
+ union {
+ struct sockaddr generic;
+ struct sockaddr_in in;
+ struct sockaddr_in6 in6;
+ } ra;
+ size_t ralen;
+
+ memset (&ra, '\0', sizeof(ra));
+ switch (af){
+ case AF_INET:
+ ra.in.sin_family = AF_INET;
+ memcpy (&ra.in.sin_addr, raddr, sizeof(struct in_addr));
+ ralen = sizeof(struct sockaddr_in);
+ break;
+ case AF_INET6:
+ ra.in6.sin6_family = AF_INET6;
+ memcpy (&ra.in6.sin6_addr, raddr, sizeof(struct in6_addr));
+ ralen = sizeof(struct sockaddr_in6);
+ break;
+ default:
+ return 0;
+ }
+ return ruserok_sa (&ra.generic, ralen, superuser, ruser, luser);
+}
+libc_hidden_def (iruserok_af)
+
+int
+iruserok (u_int32_t raddr, int superuser, const char *ruser, const char *luser)
+{
+ return iruserok_af (&raddr, superuser, ruser, luser, AF_INET);
+}
+
+/*
+ * XXX
+ * Don't make static, used by lpd(8).
+ *
+ * This function is not used anymore. It is only present because lpd(8)
+ * calls it (!?!). We simply call __invaliduser2() with an illegal rhost
+ * argument. This means that netgroups won't work in .rhost/hosts.equiv
+ * files. If you want lpd to work with netgroups, fix lpd to use ruserok()
+ * or PAM.
+ * Returns 0 if ok, -1 if not ok.
+ */
+int
+__ivaliduser (FILE *hostf, u_int32_t raddr, const char *luser,
+ const char *ruser)
+{
+ struct sockaddr_in ra;
+ memset(&ra, '\0', sizeof(ra));
+ ra.sin_family = AF_INET;
+ ra.sin_addr.s_addr = raddr;
+ return __validuser2_sa(hostf, (struct sockaddr *)&ra, sizeof(ra),
+ luser, ruser, "-");
+}
+
+
+/* Returns 1 on positive match, 0 on no match, -1 on negative match. */
+static int
+internal_function
+__checkhost_sa (struct sockaddr *ra, size_t ralen, char *lhost,
+ const char *rhost)
+{
+ struct addrinfo hints, *res0, *res;
+ char raddr[INET6_ADDRSTRLEN];
+ int match;
+ int negate=1; /* Multiply return with this to get -1 instead of 1 */
+
+ /* Check nis netgroup. */
+ if (strncmp ("+@", lhost, 2) == 0)
+ return innetgr (&lhost[2], rhost, NULL, NULL);
+
+ if (strncmp ("-@", lhost, 2) == 0)
+ return -innetgr (&lhost[2], rhost, NULL, NULL);
+
+ /* -host */
+ if (strncmp ("-", lhost,1) == 0) {
+ negate = -1;
+ lhost++;
+ } else if (strcmp ("+",lhost) == 0) {
+ return 1; /* asking for trouble, but ok.. */
+ }
+
+ /* Try for raw ip address first. */
+ /* XXX */
+ if (getnameinfo(ra, ralen,
+ raddr, sizeof(raddr), NULL, 0,
+ NI_NUMERICHOST) == 0
+ && strcmp(raddr, lhost) == 0)
+ return negate;
+
+ /* Better be a hostname. */
+ match = 0;
+ memset(&hints, '\0', sizeof(hints));
+ hints.ai_family = ra->sa_family;
+ if (getaddrinfo(lhost, NULL, &hints, &res0) == 0){
+ /* Spin through ip addresses. */
+ for (res = res0; res; res = res->ai_next)
+ {
+ if (res->ai_family == ra->sa_family
+ && !memcmp(res->ai_addr, ra, res->ai_addrlen))
+ {
+ match = 1;
+ break;
+ }
+ }
+ freeaddrinfo (res0);
+ }
+ return negate * match;
+}
+
+/* Returns 1 on positive match, 0 on no match, -1 on negative match. */
+static int
+internal_function
+__icheckuser (const char *luser, const char *ruser)
+{
+ /*
+ luser is user entry from .rhosts/hosts.equiv file
+ ruser is user id on remote host
+ */
+
+ /* [-+]@netgroup */
+ if (strncmp ("+@", luser, 2) == 0)
+ return innetgr (&luser[2], NULL, ruser, NULL);
+
+ if (strncmp ("-@", luser,2) == 0)
+ return -innetgr (&luser[2], NULL, ruser, NULL);
+
+ /* -user */
+ if (strncmp ("-", luser, 1) == 0)
+ return -(strcmp (&luser[1], ruser) == 0);
+
+ /* + */
+ if (strcmp ("+", luser) == 0)
+ return 1;
+
+ /* simple string match */
+ return strcmp (ruser, luser) == 0;
+}
+
+/*
+ * Returns 1 for blank lines (or only comment lines) and 0 otherwise
+ */
+static int
+__isempty (char *p)
+{
+ while (*p && isspace (*p)) {
+ ++p;
+ }
+
+ return (*p == '\0' || *p == '#') ? 1 : 0 ;
+}
+
+/*
+ * Returns 0 if positive match, -1 if _not_ ok.
+ */
+static int
+__validuser2_sa (FILE *hostf, struct sockaddr *ra, size_t ralen,
+ const char *luser, const char *ruser, const char *rhost)
+{
+ const char *user;
+ char *p;
+ int hcheck, ucheck;
+ char *buf = NULL;
+ size_t bufsize = 0;
+ int retval = -1;
+
+ while (__getline (&buf, &bufsize, hostf) > 0) {
+ buf[bufsize - 1] = '\0'; /* Make sure it's terminated. */
+ p = buf;
+
+ /* Skip empty or comment lines */
+ if (__isempty (p)) {
+ continue;
+ }
+
+ for (;*p && !isspace(*p); ++p) {
+ *p = _tolower (*p);
+ }
+
+ /* Next we want to find the permitted name for the remote user. */
+ if (*p == ' ' || *p == '\t') {
+ /* <nul> terminate hostname and skip spaces */
+ for (*p++='\0'; *p && isspace (*p); ++p);
+
+ user = p; /* this is the user's name */
+ while (*p && !isspace (*p))
+ ++p; /* find end of user's name */
+ } else
+ user = p;
+
+ *p = '\0'; /* <nul> terminate username (+host?) */
+
+ /* buf -> host(?) ; user -> username(?) */
+ if (*buf == '\0')
+ break;
+ if (*user == '\0')
+ user = luser;
+
+ /* First check the user part. In a naive implementation we
+ would check the host part first, then the user. However,
+ if we check the user first and reject the entry we will
+ have saved doing any host lookups to normalize the comparison
+ and that likely saves several DNS queries. Therefore we
+ check the user first. */
+ ucheck = __icheckuser (user, ruser);
+
+ /* Either we found the user, or we didn't and this is a
+ negative host check. We must do the negative host lookup
+ in order to preserve the semantics of stopping on this line
+ before processing others. */
+ if (ucheck != 0 || *buf == '-') {
+
+ /* Next check host part. */
+ hcheck = __checkhost_sa (ra, ralen, buf, rhost);
+
+ /* Negative '-host user(?)' match? */
+ if (hcheck < 0)
+ break;
+
+ /* Positive 'host user' match? */
+ if (hcheck > 0 && ucheck > 0) {
+ retval = 0;
+ break;
+ }
+
+ /* Negative 'host -user' match? */
+ if (hcheck > 0 && ucheck < 0)
+ break;
+
+ /* Neither, go on looking for match. */
+ }
+ }
+
+ free (buf);
+
+ return retval;
+}