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-rw-r--r--inet/rcmd.c419
1 files changed, 281 insertions, 138 deletions
diff --git a/inet/rcmd.c b/inet/rcmd.c
index ace393f..f3dc1bd 100644
--- a/inet/rcmd.c
+++ b/inet/rcmd.c
@@ -1,4 +1,32 @@
/*
+ * 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.
*
@@ -54,100 +82,124 @@ static char sccsid[] = "@(#)rcmd.c 8.3 (Berkeley) 3/26/94";
int __ivaliduser __P ((FILE *, u_int32_t, const char *, const char *));
-static int __ivaliduser2 __P ((FILE *, u_int32_t, const char *, const char *,
- const char *));
-static int iruserok2 (u_int32_t raddr, int superuser, const char *ruser,
- const char *luser, const char *rhost);
+static int __validuser2_sa __P ((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);
+static char ahostbuf[NI_MAXHOST];
int
-rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
+rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, af)
char **ahost;
u_short rport;
const char *locuser, *remuser, *cmd;
int *fd2p;
+ sa_family_t af;
{
- struct hostent hostbuf, *hp;
+ char paddr[INET6_ADDRSTRLEN];
size_t hstbuflen;
char *tmphstbuf;
- struct sockaddr_in sin, from;
+ struct addrinfo hints, *res, *ai;
+ struct sockaddr_storage from;
struct pollfd pfd[2];
int32_t oldmask;
pid_t pid;
- int s, lport, timo;
+ int s, lport, timo, error;
char c;
- int herr;
+ int refused;
+ char num[8];
+
+ if (af != AF_INET && af != AF_INET6)
+ {
+ __set_errno (EAFNOSUPPORT);
+ return -1;
+ }
pid = __getpid();
- hstbuflen = 1024;
- tmphstbuf = __alloca (hstbuflen);
- while (__gethostbyname_r (*ahost, &hostbuf, tmphstbuf, hstbuflen,
- &hp, &herr) != 0
- || hp == NULL)
- if (herr != NETDB_INTERNAL || errno != ERANGE)
- {
- __set_h_errno (herr);
- herror(*ahost);
- return -1;
- }
- else
- {
- /* Enlarge the buffer. */
- hstbuflen *= 2;
- tmphstbuf = __alloca (hstbuflen);
- }
+ 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) {
+ fprintf(stderr, "rcmd: getaddrinfo: %s\n",
+ gai_strerror(error));
+ return (-1);
+ }
pfd[0].events = POLLIN;
pfd[1].events = POLLIN;
- *ahost = hp->h_name;
+ if (res->ai_canonname){
+ strncpy(ahostbuf, res->ai_canonname, sizeof(ahostbuf));
+ ahostbuf[sizeof(ahostbuf)-1] = '\0';
+ *ahost = ahostbuf;
+ }
+ else
+ *ahost = NULL;
+ ai = res;
+ refused = 0;
oldmask = __sigblock(sigmask(SIGURG));
for (timo = 1, lport = IPPORT_RESERVED - 1;;) {
- s = rresvport(&lport);
+ s = rresvport_af(&lport, ai->ai_family);
if (s < 0) {
if (errno == EAGAIN)
- (void)fprintf(stderr,
- _("rcmd: socket: All ports in use\n"));
+ fprintf(stderr,
+ _("rcmd: socket: All ports in use\n"));
else
- (void)fprintf(stderr, "rcmd: socket: %m\n");
+ fprintf(stderr, "rcmd: socket: %m\n");
__sigsetmask(oldmask);
+ freeaddrinfo(res);
return -1;
}
__fcntl(s, F_SETOWN, pid);
- sin.sin_family = hp->h_addrtype;
- bcopy(hp->h_addr_list[0], &sin.sin_addr,
- MIN (sizeof (sin.sin_addr), hp->h_length));
- sin.sin_port = rport;
- if (__connect(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
+ if (__connect(s, ai->ai_addr, ai->ai_addrlen) >= 0)
break;
(void)__close(s);
if (errno == EADDRINUSE) {
lport--;
continue;
}
- if (errno == ECONNREFUSED && timo <= 16) {
- (void)__sleep(timo);
- timo *= 2;
- continue;
- }
- if (hp->h_addr_list[1] != NULL) {
+ if (errno == ECONNREFUSED)
+ refused = 1;
+ if (ai->ai_next != NULL) {
int oerrno = errno;
- (void)fprintf(stderr, _("connect to address %s: "),
- inet_ntoa(sin.sin_addr));
+ getnameinfo(ai->ai_addr, ai->ai_addrlen,
+ paddr, sizeof(paddr),
+ NULL, 0,
+ NI_NUMERICHOST);
+ fprintf(stderr, "connect to address %s: ", paddr);
__set_errno (oerrno);
perror(0);
- hp->h_addr_list++;
- bcopy(hp->h_addr_list[0], &sin.sin_addr,
- MIN (sizeof (sin.sin_addr), hp->h_length));
- (void)fprintf(stderr, _("Trying %s...\n"),
- inet_ntoa(sin.sin_addr));
+ ai = ai->ai_next;
+ getnameinfo(ai->ai_addr, ai->ai_addrlen,
+ paddr, sizeof(paddr),
+ NULL, 0,
+ NI_NUMERICHOST);
+ fprintf(stderr, "Trying %s...\n", paddr);
+ continue;
+ }
+ if (refused && timo <= 16) {
+ (void)sleep(timo);
+ timo *= 2;
+ ai = res;
+ refused = 0;
continue;
}
- (void)fprintf(stderr, "%s: %m\n", hp->h_name);
+ freeaddrinfo(res);
+ (void)fprintf(stderr, "%s: %s\n", *ahost, strerror(errno));
__sigsetmask(oldmask);
return -1;
}
@@ -157,8 +209,8 @@ rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
lport = 0;
} else {
char num[8];
- int s2 = rresvport(&lport), s3;
- size_t len = sizeof(from);
+ int s2 = rresvport_af(&lport, ai->ai_family), s3;
+ size_t len = ai->ai_addrlen;
if (s2 < 0)
goto bad;
@@ -184,6 +236,17 @@ rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
goto bad;
}
s3 = accept(s2, (struct sockaddr *)&from, &len);
+ switch (from.__ss_family) {
+ case AF_INET:
+ rport = ntohs(((struct sockaddr_in *)&from)->sin_port);
+ break;
+ case AF_INET6:
+ rport = ntohs(((struct sockaddr_in6 *)&from)->sin6_port);
+ break;
+ default:
+ rport = 0;
+ break;
+ }
(void)__close(s2);
if (s3 < 0) {
(void)fprintf(stderr,
@@ -192,12 +255,10 @@ rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
goto bad;
}
*fd2p = s3;
- from.sin_port = ntohs((u_short)from.sin_port);
- if (from.sin_family != AF_INET ||
- from.sin_port >= IPPORT_RESERVED ||
- from.sin_port < IPPORT_RESERVED / 2) {
+
+ if (rport >= IPPORT_RESERVED || rport < IPPORT_RESERVED / 2){
(void)fprintf(stderr,
- _("socket: protocol failure in circuit setup\n"));
+ _("socket: protocol failure in circuit setup\n"));
goto bad2;
}
}
@@ -218,6 +279,7 @@ rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
goto bad2;
}
__sigsetmask(oldmask);
+ freeaddrinfo(res);
return s;
bad2:
if (lport)
@@ -225,74 +287,113 @@ bad2:
bad:
(void)__close(s);
__sigsetmask(oldmask);
+ freeaddrinfo(res);
return -1;
}
int
-rresvport(alport)
+rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
+ char **ahost;
+ u_short rport;
+ const char *locuser, *remuser, *cmd;
+ int *fd2p;
+{
+ return rcmd_af (ahost, rport, locuser, remuser, cmd, fd2p, AF_INET);
+}
+
+int
+rresvport_af(alport, family)
int *alport;
+ sa_family_t family;
{
- struct sockaddr_in sin;
+ struct sockaddr_storage ss;
int s;
+ size_t len;
+ uint16_t *sport, i;
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = INADDR_ANY;
- s = __socket(AF_INET, SOCK_STREAM, 0);
+ switch(family){
+ case AF_INET:
+ len = sizeof(struct sockaddr_in);
+ sport = &((struct sockaddr_in *)&ss)->sin_port;
+ break;
+ case AF_INET6:
+ len = sizeof(struct sockaddr_in6);
+ sport = &((struct sockaddr_in6 *)&ss)->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.__ss_len = len;
+#endif
+ ss.__ss_family = family;
+
for (;;) {
- sin.sin_port = htons((u_short)*alport);
- if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
+ *sport = htons(i);
+ if (bind(s, (struct sockaddr *)&ss, len) >= 0){
+ *alport = i;
return s;
+ }
if (errno != EADDRINUSE) {
(void)__close(s);
return -1;
}
(*alport)--;
- if (*alport == IPPORT_RESERVED/2) {
- (void)__close(s);
- __set_errno (EAGAIN); /* close */
- return -1;
- }
+ if (*alport == IPPORT_RESERVED/2)
+ break;
}
+ (void)__close(s);
+ __set_errno (EAGAIN);
+ return -1;
+}
+
+int
+rresvport(alport)
+ int *alport;
+{
+ return rresvport_af(alport, AF_INET);
}
int __check_rhosts_file = 1;
char *__rcmd_errstr;
int
+ruserok_af(rhost, superuser, ruser, luser, af)
+ const char *rhost, *ruser, *luser;
+ int superuser;
+ 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);
+}
+int
ruserok(rhost, superuser, ruser, luser)
const char *rhost, *ruser, *luser;
int superuser;
{
- struct hostent hostbuf, *hp;
- size_t buflen;
- char *buffer;
- u_int32_t addr;
- char **ap;
- int herr;
-
- buflen = 1024;
- buffer = __alloca (buflen);
-
- while (__gethostbyname_r (rhost, &hostbuf, buffer, buflen, &hp, &herr)
- != 0
- || hp == NULL)
- if (herr != NETDB_INTERNAL || errno != ERANGE)
- return -1;
- else
- {
- /* Enlarge the buffer. */
- buflen *= 2;
- buffer = __alloca (buflen);
- }
-
- for (ap = hp->h_addr_list; *ap; ++ap) {
- bcopy(*ap, &addr, sizeof(addr));
- if (iruserok2(addr, superuser, ruser, luser, rhost) == 0)
- return 0;
- }
- return -1;
+ return ruserok_af(rhost, superuser, ruser, luser, AF_INET);
}
/* Extremely paranoid file open function. */
@@ -348,8 +449,9 @@ iruserfopen (char *file, uid_t okuser)
* Returns 0 if ok, -1 if not ok.
*/
static int
-iruserok2 (raddr, superuser, ruser, luser, rhost)
- u_int32_t raddr;
+ruserok2_sa (ra, ralen, superuser, ruser, luser, rhost)
+ struct sockaddr *ra;
+ size_t ralen;
int superuser;
const char *ruser, *luser, *rhost;
{
@@ -361,7 +463,7 @@ iruserok2 (raddr, superuser, ruser, luser, rhost)
if (hostf)
{
- isbad = __ivaliduser2 (hostf, raddr, luser, ruser, rhost);
+ isbad = __validuser2_sa (hostf, ra, ralen, luser, ruser, rhost);
fclose (hostf);
if (!isbad)
@@ -395,7 +497,7 @@ iruserok2 (raddr, superuser, ruser, luser, rhost)
if (hostf != NULL)
{
- isbad = __ivaliduser2 (hostf, raddr, luser, ruser, rhost);
+ isbad = __validuser2_sa (hostf, ra, ralen, luser, ruser, rhost);
fclose (hostf);
}
@@ -404,15 +506,56 @@ iruserok2 (raddr, superuser, ruser, luser, rhost)
}
return -1;
}
+/*
+ * ruserok_sa() is now discussed on ipng, so
+ * currently disabled for external use
+ */
+static int ruserok_sa(ra, ralen, superuser, ruser, luser)
+ struct sockaddr *ra;
+ size_t ralen;
+ int superuser;
+ const char *ruser, *luser;
+{
+ ruserok2_sa(ra, ralen, superuser, ruser, luser, "-");
+}
/* This is the exported version. */
int
+iruserok_af (raddr, superuser, ruser, luser, af)
+ const void *raddr;
+ int superuser;
+ const char *ruser, *luser;
+ sa_family_t af;
+{
+ struct sockaddr_storage ra;
+ size_t ralen;
+
+ memset (&ra, '\0', sizeof(ra));
+ switch (af){
+ case AF_INET:
+ ((struct sockaddr_in *)&ra)->sin_family = AF_INET;
+ memcpy (&(((struct sockaddr_in *)&ra)->sin_addr), raddr,
+ sizeof(struct in_addr));
+ ralen = sizeof(struct sockaddr_in);
+ break;
+ case AF_INET6:
+ ((struct sockaddr_in6 *)&ra)->sin6_family = AF_INET6;
+ memcpy (&(((struct sockaddr_in6 *)&ra)->sin6_addr), raddr,
+ sizeof(struct in6_addr));
+ ralen = sizeof(struct sockaddr_in6);
+ break;
+ default:
+ return 0;
+ }
+ return ruserok_sa ((struct sockaddr *)&ra, ralen, superuser, ruser, luser);
+}
+int
iruserok (raddr, superuser, ruser, luser)
u_int32_t raddr;
int superuser;
const char *ruser, *luser;
{
- return iruserok2 (raddr, superuser, ruser, luser, "-");
+ return iruserok_af (&raddr, superuser, ruser, luser, AF_INET);
}
/*
@@ -432,26 +575,31 @@ __ivaliduser(hostf, raddr, luser, ruser)
u_int32_t raddr;
const char *luser, *ruser;
{
- return __ivaliduser2(hostf, raddr, luser, 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
-__icheckhost (raddr, lhost, rhost)
- u_int32_t raddr;
+__checkhost_sa (ra, ralen, lhost, rhost)
+ struct sockaddr *ra;
+ size_t ralen;
char *lhost;
const char *rhost;
{
- struct hostent hostbuf, *hp;
- size_t buflen;
- char *buffer;
+ struct addrinfo hints, *res0, *res;
int herr;
int save_errno;
- u_int32_t laddr;
+ char raddr[INET6_ADDRSTRLEN];
+ int match;
int negate=1; /* Multiply return with this to get -1 instead of 1 */
- char **pp, *user;
+ char *user;
/* Check nis netgroup. */
if (strncmp ("+@", lhost, 2) == 0)
@@ -469,34 +617,28 @@ __icheckhost (raddr, lhost, rhost)
}
/* Try for raw ip address first. */
- if (isdigit (*lhost) && (long) (laddr = inet_addr (lhost)) != -1)
- return negate * (! (raddr ^ laddr));
+ /* XXX */
+ if (getnameinfo(ra, ralen,
+ raddr, sizeof(raddr), NULL, 0,
+ NI_NUMERICHOST) == 0)
+ return negate * (strcmp(raddr, lhost) == 0);
/* Better be a hostname. */
- buflen = 1024;
- buffer = __alloca (buflen);
- save_errno = errno;
- while (__gethostbyname_r (lhost, &hostbuf, buffer, buflen, &hp, &herr)
- != 0)
- if (herr != NETDB_INTERNAL || errno != ERANGE)
- return (0);
- else {
- /* Enlarge the buffer. */
- buflen *= 2;
- buffer = __alloca (buflen);
- __set_errno (0);
+ 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->ai_next){
+ if (res->ai_family == ra->sa_family &&
+ !memcmp(res->ai_addr, ra, res->ai_addrlen)){
+ match = 1;
+ break;
+ }
}
- __set_errno (save_errno);
- if (hp == NULL)
- return 0;
-
- /* Spin through ip addresses. */
- for (pp = hp->h_addr_list; *pp; ++pp)
- if (!memcmp (&raddr, *pp, sizeof (u_int32_t)))
- return negate;
-
- /* No match. */
- return (0);
+ freeaddrinfo(res0);
+ }
+ return (negate * match);
}
/* Returns 1 on positive match, 0 on no match, -1 on negative match. */
@@ -548,9 +690,10 @@ __isempty(p)
* Returns 0 if positive match, -1 if _not_ ok.
*/
static int
-__ivaliduser2(hostf, raddr, luser, ruser, rhost)
+__validuser2_sa(hostf, ra, ralen, luser, ruser, rhost)
FILE *hostf;
- u_int32_t raddr;
+ struct sockaddr *ra;
+ size_t ralen;
const char *luser, *ruser, *rhost;
{
register const char *user;
@@ -598,7 +741,7 @@ __ivaliduser2(hostf, raddr, luser, ruser, rhost)
/* buf -> host(?) ; user -> username(?) */
/* First check host part */
- hcheck = __icheckhost (raddr, buf, rhost);
+ hcheck = __checkhost_sa (ra, ralen, buf, rhost);
if (hcheck < 0)
break;