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tcpd/tcp_wrappers_7.6-ipv6-1.6.diff

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;; IPv6 patch for tcp_wrappers_7.6 1.6
;; Aug 23, 1999 by Hajimu UMEMOTO <ume@mahoroba.org>
;;
;; This patch supports IPv4/IPv6 dual stack and IPv4-mapped IPv6 address.
;; You can replace stock tcpd or libwrap.a with this.
;; IPv6 address pattern is as a `[net]/prefixlen' pair.
;; This patch was tested on KAME/FreeBSD, KAME/FreeBSD3, KAME/NetBSD,
;; RedHat 5.1 with kernel 2.1.126, and RedHat 6.0 with kernel 2.2.10.
;;
;; CAUTION:
;; Back out change for field separater. Now, field separater is `:'
;; not `|'. To specify IPv6 address, enclose IPv6 address with `['
;; and `]'.
;;
;; For Linux users:
;; If your libc doesn't have sockaddr_storage, try target `linux-old'.
================================================================================
--- fix_options.c
+++ fix_options.c
@@ -11,6 +11,9 @@
#include <sys/types.h>
#include <sys/param.h>
+#ifdef INET6
+#include <sys/socket.h>
+#endif
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
@@ -41,6 +44,22 @@
unsigned int opt;
int optlen;
struct in_addr dummy;
+#ifdef INET6
+ struct sockaddr_storage ss;
+ int sslen;
+
+ /*
+ * check if this is AF_INET socket
+ * XXX IPv6 support?
+ */
+ sslen = sizeof(ss);
+ if (getsockname(fd, (struct sockaddr *)&ss, &sslen < 0)) {
+ syslog(LOG_ERR, "getpeername: %m");
+ clean_exit(request);
+ }
+ if (ss.ss_family != AF_INET)
+ return;
+#endif
if ((ip = getprotobyname("ip")) != 0)
ipproto = ip->p_proto;
--- hosts_access.5
+++ hosts_access.5
@@ -85,10 +85,17 @@
for daemon process names or for client user names.
.IP \(bu
An expression of the form `n.n.n.n/m.m.m.m\' is interpreted as a
-`net/mask\' pair. A host address is matched if `net\' is equal to the
+`net/mask\' pair. A IPv4 host address is matched if `net\' is equal to the
bitwise AND of the address and the `mask\'. For example, the net/mask
pattern `131.155.72.0/255.255.254.0\' matches every address in the
range `131.155.72.0\' through `131.155.73.255\'.
+.IP \(bu
+An expression of the form `[n:n:n:n:n:n:n:n]/m\' is interpreted as a
+`[net]/prefixlen\' pair. A IPv6 host address is matched if
+`prefixlen\' bits of `net\' is equal to the `prefixlen\' bits of the
+address. For example, the [net]/prefixlen pattern
+`[3ffe:505:2:1::]/64\' matches every address in the range
+`3ffe:505:2:1::\' through `3ffe:505:2:1:ffff:ffff:ffff:ffff\'.
.SH WILDCARDS
The access control language supports explicit wildcards:
.IP ALL
--- hosts_access.c
+++ hosts_access.c
@@ -25,6 +25,9 @@
#include <sys/types.h>
#include <sys/param.h>
+#ifdef INET6
+#include <sys/socket.h>
+#endif
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
@@ -83,6 +86,10 @@
static int host_match();
static int string_match();
static int masked_match();
+#ifdef INET6
+static int masked_match4();
+static int masked_match6();
+#endif
/* Size of logical line buffer. */
@@ -317,6 +324,13 @@
{
int n;
+#ifdef INET6
+ /* convert IPv4 mapped IPv6 address to IPv4 address */
+ if (STRN_EQ(string, "::ffff:", 7)
+ && dot_quad_addr(string + 7) != INADDR_NONE) {
+ string += 7;
+ }
+#endif
if (tok[0] == '.') { /* suffix */
n = strlen(string) - strlen(tok);
return (n > 0 && STR_EQ(tok, string + n));
@@ -327,20 +341,55 @@
} else if (tok[(n = strlen(tok)) - 1] == '.') { /* prefix */
return (STRN_EQ(tok, string, n));
} else { /* exact match */
+#ifdef INET6
+ struct in6_addr pat, addr;
+ int len, ret;
+ char ch;
+
+ len = strlen(tok);
+ if (*tok == '[' && tok[len - 1] == ']') {
+ ch = tok[len - 1];
+ tok[len - 1] = '\0';
+ ret = inet_pton(AF_INET6, tok + 1, pat.s6_addr);
+ tok[len - 1] = ch;
+ if (ret != 1 || inet_pton(AF_INET6, string, addr.s6_addr) != 1)
+ return NO;
+ return (!memcmp(&pat, &addr, sizeof(struct in6_addr)));
+ }
+#endif
return (STR_EQ(tok, string));
}
}
/* masked_match - match address against netnumber/netmask */
+#ifdef INET6
static int masked_match(net_tok, mask_tok, string)
char *net_tok;
char *mask_tok;
char *string;
{
+ return (masked_match4(net_tok, mask_tok, string) ||
+ masked_match6(net_tok, mask_tok, string));
+}
+
+static int masked_match4(net_tok, mask_tok, string)
+#else
+static int masked_match(net_tok, mask_tok, string)
+#endif
+char *net_tok;
+char *mask_tok;
+char *string;
+{
+#ifdef INET6
+ u_int32_t net;
+ u_int32_t mask;
+ u_int32_t addr;
+#else
unsigned long net;
unsigned long mask;
unsigned long addr;
+#endif
/*
* Disallow forms other than dotted quad: the treatment that inet_addr()
@@ -352,8 +401,61 @@
return (NO);
if ((net = dot_quad_addr(net_tok)) == INADDR_NONE
|| (mask = dot_quad_addr(mask_tok)) == INADDR_NONE) {
+#ifndef INET6
tcpd_warn("bad net/mask expression: %s/%s", net_tok, mask_tok);
+#endif
return (NO); /* not tcpd_jump() */
}
return ((addr & mask) == net);
}
+
+#ifdef INET6
+static int masked_match6(net_tok, mask_tok, string)
+char *net_tok;
+char *mask_tok;
+char *string;
+{
+ struct in6_addr net, addr;
+ u_int32_t mask;
+ int len, mask_len, i = 0;
+ char ch;
+
+ if (inet_pton(AF_INET6, string, addr.s6_addr) != 1)
+ return NO;
+
+ if (IN6_IS_ADDR_V4MAPPED(&addr)) {
+ if ((*(u_int32_t *)&net.s6_addr[12] = dot_quad_addr(net_tok)) == INADDR_NONE
+ || (mask = dot_quad_addr(mask_tok)) == INADDR_NONE)
+ return (NO);
+ return ((*(u_int32_t *)&addr.s6_addr[12] & mask) == *(u_int32_t *)&net.s6_addr[12]);
+ }
+
+ /* match IPv6 address against netnumber/prefixlen */
+ len = strlen(net_tok);
+ if (*net_tok != '[' || net_tok[len - 1] != ']')
+ return NO;
+ ch = net_tok[len - 1];
+ net_tok[len - 1] = '\0';
+ if (inet_pton(AF_INET6, net_tok + 1, net.s6_addr) != 1) {
+ net_tok[len - 1] = ch;
+ return NO;
+ }
+ net_tok[len - 1] = ch;
+ if ((mask_len = atoi(mask_tok)) < 0 || mask_len > 128)
+ return NO;
+
+ while (mask_len > 0) {
+ if (mask_len < 32) {
+ mask = htonl(~(0xffffffff >> mask_len));
+ if ((*(u_int32_t *)&addr.s6_addr[i] & mask) != (*(u_int32_t *)&net.s6_addr[i] & mask))
+ return NO;
+ break;
+ }
+ if (*(u_int32_t *)&addr.s6_addr[i] != *(u_int32_t *)&net.s6_addr[i])
+ return NO;
+ i += 4;
+ mask_len -= 32;
+ }
+ return YES;
+}
+#endif /* INET6 */
--- inetcf.c
+++ inetcf.c
@@ -26,6 +26,9 @@
* guesses. Shorter names follow longer ones.
*/
char *inet_files[] = {
+#ifdef INET6
+ "/usr/local/v6/etc/inet6d.conf", /* KAME */
+#endif
"/private/etc/inetd.conf", /* NEXT */
"/etc/inet/inetd.conf", /* SYSV4 */
"/usr/etc/inetd.conf", /* IRIX?? */
--- misc.c
+++ misc.c
@@ -58,9 +58,31 @@
{
char *cp;
+#ifdef INET6
+ int bracket = 0;
+
+ for (cp = string; cp && *cp; cp++) {
+ switch (*cp) {
+ case '[':
+ bracket++;
+ break;
+ case ']':
+ bracket--;
+ break;
+ default:
+ if (bracket == 0 && *cp == delimiter) {
+ *cp++ = 0;
+ return cp;
+ }
+ break;
+ }
+ }
+ return (NULL);
+#else
if ((cp = strchr(string, delimiter)) != 0)
*cp++ = 0;
return (cp);
+#endif
}
/* dot_quad_addr - convert dotted quad to internal form */
--- refuse.c
+++ refuse.c
@@ -25,7 +25,12 @@
void refuse(request)
struct request_info *request;
{
+#ifdef INET6
+ syslog(deny_severity, "refused connect from %s (%s)",
+ eval_client(request), eval_hostaddr(request->client));
+#else
syslog(deny_severity, "refused connect from %s", eval_client(request));
+#endif
clean_exit(request);
/* NOTREACHED */
}
--- rfc931.c
+++ rfc931.c
@@ -68,20 +68,50 @@
/* rfc931 - return remote user name, given socket structures */
void rfc931(rmt_sin, our_sin, dest)
+#ifdef INET6
+struct sockaddr *rmt_sin;
+struct sockaddr *our_sin;
+#else
struct sockaddr_in *rmt_sin;
struct sockaddr_in *our_sin;
+#endif
char *dest;
{
unsigned rmt_port;
unsigned our_port;
+#ifdef INET6
+ struct sockaddr_storage rmt_query_sin;
+ struct sockaddr_storage our_query_sin;
+ int alen;
+#else
struct sockaddr_in rmt_query_sin;
struct sockaddr_in our_query_sin;
+#endif
char user[256]; /* XXX */
char buffer[512]; /* XXX */
char *cp;
char *result = unknown;
FILE *fp;
+#ifdef INET6
+ /* address family must be the same */
+ if (rmt_sin->sa_family != our_sin->sa_family) {
+ STRN_CPY(dest, result, STRING_LENGTH);
+ return;
+ }
+ switch (our_sin->sa_family) {
+ case AF_INET:
+ alen = sizeof(struct sockaddr_in);
+ break;
+ case AF_INET6:
+ alen = sizeof(struct sockaddr_in6);
+ break;
+ default:
+ STRN_CPY(dest, result, STRING_LENGTH);
+ return;
+ }
+#endif
+
/*
* Use one unbuffered stdio stream for writing to and for reading from
* the RFC931 etc. server. This is done because of a bug in the SunOS
@@ -92,7 +122,11 @@
* sockets.
*/
+#ifdef INET6
+ if ((fp = fsocket(our_sin->sa_family, SOCK_STREAM, 0)) != 0) {
+#else
if ((fp = fsocket(AF_INET, SOCK_STREAM, 0)) != 0) {
+#endif
setbuf(fp, (char *) 0);
/*
@@ -112,6 +146,25 @@
* addresses from the query socket.
*/
+#ifdef INET6
+ memcpy(&our_query_sin, our_sin, alen);
+ memcpy(&rmt_query_sin, rmt_sin, alen);
+ switch (our_sin->sa_family) {
+ case AF_INET:
+ ((struct sockaddr_in *)&our_query_sin)->sin_port = htons(ANY_PORT);
+ ((struct sockaddr_in *)&rmt_query_sin)->sin_port = htons(RFC931_PORT);
+ break;
+ case AF_INET6:
+ ((struct sockaddr_in6 *)&our_query_sin)->sin6_port = htons(ANY_PORT);
+ ((struct sockaddr_in6 *)&rmt_query_sin)->sin6_port = htons(RFC931_PORT);
+ break;
+ }
+
+ if (bind(fileno(fp), (struct sockaddr *) & our_query_sin,
+ alen) >= 0 &&
+ connect(fileno(fp), (struct sockaddr *) & rmt_query_sin,
+ alen) >= 0) {
+#else
our_query_sin = *our_sin;
our_query_sin.sin_port = htons(ANY_PORT);
rmt_query_sin = *rmt_sin;
@@ -121,6 +174,7 @@
sizeof(our_query_sin)) >= 0 &&
connect(fileno(fp), (struct sockaddr *) & rmt_query_sin,
sizeof(rmt_query_sin)) >= 0) {
+#endif
/*
* Send query to server. Neglect the risk that a 13-byte
@@ -129,8 +183,13 @@
*/
fprintf(fp, "%u,%u\r\n",
+#ifdef INET6
+ ntohs(((struct sockaddr_in *)rmt_sin)->sin_port),
+ ntohs(((struct sockaddr_in *)our_sin)->sin_port));
+#else
ntohs(rmt_sin->sin_port),
ntohs(our_sin->sin_port));
+#endif
fflush(fp);
/*
@@ -144,8 +203,13 @@
&& ferror(fp) == 0 && feof(fp) == 0
&& sscanf(buffer, "%u , %u : USERID :%*[^:]:%255s",
&rmt_port, &our_port, user) == 3
+#ifdef INET6
+ && ntohs(((struct sockaddr_in *)rmt_sin)->sin_port) == rmt_port
+ && ntohs(((struct sockaddr_in *)our_sin)->sin_port) == our_port) {
+#else
&& ntohs(rmt_sin->sin_port) == rmt_port
&& ntohs(our_sin->sin_port) == our_port) {
+#endif
/*
* Strip trailing carriage return. It is part of the
--- scaffold.c
+++ scaffold.c
@@ -20,6 +20,9 @@
#include <syslog.h>
#include <setjmp.h>
#include <string.h>
+#if defined(INET6) && !defined(USE_GETIPNODEBY)
+#include <resolv.h>
+#endif
#ifndef INADDR_NONE
#define INADDR_NONE (-1) /* XXX should be 0xffffffff */
@@ -57,6 +60,9 @@
/* void */ ;
if ((hb = (struct hostent_block *) malloc(sizeof(struct hostent_block)
+#ifdef INET6
+ + strlen(hp->h_name) + 1
+#endif
+ (hp->h_length + sizeof(char *)) * count)) == 0) {
fprintf(stderr, "Sorry, out of memory\n");
exit(1);
@@ -66,6 +72,11 @@
hb->host.h_addr_list = hb->addr_list;
hb->host.h_addr_list[count] = 0;
data = (char *) (hb->host.h_addr_list + count + 1);
+#ifdef INET6
+ hb->host.h_name = data + hp->h_length * count;
+ strcpy(hb->host.h_name, hp->h_name);
+ hb->host.h_addrtype = hp->h_addrtype;
+#endif
for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
hb->host.h_addr_list[count] = data + hp->h_length * count;
@@ -74,6 +85,100 @@
return (&hb->host);
}
+#if defined(INET6) && !defined(USE_GETIPNODEBY)
+/* merge_hostent - merge hostent in one memory block */
+
+static struct hostent *merge_hostent(hp1, hp2)
+struct hostent *hp1, *hp2;
+{
+ struct hostent_block {
+ struct hostent host;
+ char *addr_list[1];
+ };
+ struct hostent_block *hb;
+ int count, count2;
+ char *data;
+ char *addr;
+
+ for (count = 0; hp1->h_addr_list[count] != 0; count++)
+ /* void */ ;
+ for (count2 = 0; hp2->h_addr_list[count2] != 0; count2++)
+ /* void */ ;
+ count += count2;
+
+ if ((hb = (struct hostent_block *) malloc(sizeof(struct hostent_block)
+ + strlen(hp1->h_name) + 1
+ + (hp1->h_length + sizeof(char *)) * count)) == 0) {
+ fprintf(stderr, "Sorry, out of memory\n");
+ exit(1);
+ }
+ memset((char *) &hb->host, 0, sizeof(hb->host));
+ hb->host.h_length = hp1->h_length;
+ hb->host.h_addr_list = hb->addr_list;
+ hb->host.h_addr_list[count] = 0;
+ data = (char *) (hb->host.h_addr_list + count + 1);
+ hb->host.h_name = data + hp1->h_length * count;
+ strcpy(hb->host.h_name, hp1->h_name);
+ hb->host.h_addrtype = hp1->h_addrtype;
+
+ for (count = 0; (addr = hp1->h_addr_list[count]) != 0; count++) {
+ hb->host.h_addr_list[count] = data + hp1->h_length * count;
+ memcpy(hb->host.h_addr_list[count], addr, hp1->h_length);
+ }
+ for (count2 = 0; (addr = hp2->h_addr_list[count2]) != 0; count2++) {
+ hb->host.h_addr_list[count] = data + hp1->h_length * count;
+ memcpy(hb->host.h_addr_list[count], addr, hp1->h_length);
+ ++count;
+ }
+ return (&hb->host);
+}
+#endif
+
+static struct hostent *gethostbyname64(host)
+char *host;
+{
+ struct hostent *hp, *hp2;
+#ifdef USE_GETIPNODEBY
+ int h_error;
+
+ if ((hp = getipnodebyname(host, AF_INET6,
+ AI_V4MAPPED | AI_ADDRCONFIG | AI_ALL,
+ &h_error)) != 0) {
+ hp2 = dup_hostent(hp);
+ freehostent(hp);
+ return (hp2);
+ }
+#else
+ struct hostent *hp1;
+ u_long res_options;
+
+ if ((_res.options & RES_INIT) == 0) {
+ if (res_init() < 0) {
+ tcpd_warn("%s: res_init() failed", host);
+ return (NULL);
+ }
+ }
+ res_options = _res.options;
+ _res.options |= RES_USE_INET6;
+ if ((hp1 = gethostbyname2(host, AF_INET6)) != NULL)
+ hp1 = dup_hostent(hp1);
+ if ((hp2 = gethostbyname2(host, AF_INET)) != NULL)
+ hp2 = dup_hostent(hp2);
+ _res.options = res_options;
+ if (hp1 && hp2) {
+ hp = merge_hostent(hp1, hp2);
+ free((char *) hp1);
+ free((char *) hp2);
+ return (hp);
+ }
+ if (hp1)
+ return (hp1);
+ if (hp2)
+ return (hp2);
+#endif
+ return (NULL);
+}
+
/* find_inet_addr - find all addresses for this host, result to free() */
struct hostent *find_inet_addr(host)
@@ -91,6 +196,15 @@
h.h_addr_list = addr_list;
h.h_addr_list[0] = (char *) &addr;
h.h_length = sizeof(addr);
+#ifdef INET6
+ h.h_addrtype = AF_INET;
+ h.h_name = (char *) malloc(strlen(host)+1);
+ if (! h.h_name){
+ fprintf(stderr, "Sorry, out of memory\n");
+ exit(1);
+ }
+ strncpy(h.h_name, host, strlen(host)+1);
+#endif
return (dup_hostent(&h));
}
@@ -104,19 +218,33 @@
tcpd_warn("%s: not an internet address", host);
return (0);
}
+#ifdef INET6
+ if ((hp = gethostbyname64(host)) == 0) {
+#else
if ((hp = gethostbyname(host)) == 0) {
+#endif
tcpd_warn("%s: host not found", host);
return (0);
}
+#ifdef INET6
+ if (hp->h_addrtype != AF_INET6) {
+ tcpd_warn("%d: not an internet host", hp->h_addrtype);
+ free((char *) hp);
+#else
if (hp->h_addrtype != AF_INET) {
tcpd_warn("%d: not an internet host", hp->h_addrtype);
+#endif
return (0);
}
if (STR_NE(host, hp->h_name)) {
tcpd_warn("%s: hostname alias", host);
tcpd_warn("(official name: %.*s)", STRING_LENGTH, hp->h_name);
}
+#ifdef INET6
+ return (hp);
+#else
return (dup_hostent(hp));
+#endif
}
/* check_dns - give each address thorough workout, return address count */
@@ -125,7 +253,13 @@
char *host;
{
struct request_info request;
+#ifdef INET6
+ struct sockaddr_storage sin;
+ char *ap;
+ int alen;
+#else
struct sockaddr_in sin;
+#endif
struct hostent *hp;
int count;
char *addr;
@@ -135,10 +269,30 @@
request_init(&request, RQ_CLIENT_SIN, &sin, 0);
sock_methods(&request);
memset((char *) &sin, 0, sizeof(sin));
+#ifdef INET6
+ sin.ss_family = hp->h_addrtype;
+ switch (hp->h_addrtype) {
+ case AF_INET:
+ ap = (char *)&((struct sockaddr_in *)&sin)->sin_addr;
+ alen = sizeof(struct sockaddr_in);
+ break;
+ case AF_INET6:
+ ap = (char *)&((struct sockaddr_in6 *)&sin)->sin6_addr;
+ alen = sizeof(struct sockaddr_in6);
+ break;
+ default:
+ return (0);
+ }
+#else
sin.sin_family = AF_INET;
+#endif
for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
+#ifdef INET6
+ memcpy(ap, addr, alen);
+#else
memcpy((char *) &sin.sin_addr, addr, sizeof(sin.sin_addr));
+#endif
/*
* Force host name and address conversions. Use the request structure
--- socket.c
+++ socket.c
@@ -30,6 +30,12 @@
#include <syslog.h>
#include <string.h>
+#ifdef INET6
+#ifndef USE_GETIPNODEBY
+#include <resolv.h>
+#endif
+#endif
+
extern char *inet_ntoa();
/* Local stuff. */
@@ -74,8 +80,13 @@
void sock_host(request)
struct request_info *request;
{
+#ifdef INET6
+ static struct sockaddr_storage client;
+ static struct sockaddr_storage server;
+#else
static struct sockaddr_in client;
static struct sockaddr_in server;
+#endif
int len;
char buf[BUFSIZ];
int fd = request->fd;
@@ -104,7 +115,11 @@
memset(buf, 0 sizeof(buf));
#endif
}
+#ifdef INET6
+ request->client->sin = (struct sockaddr *)&client;
+#else
request->client->sin = &client;
+#endif
/*
* Determine the server binding. This is used for client username
@@ -117,7 +132,11 @@
tcpd_warn("getsockname: %m");
return;
}
+#ifdef INET6
+ request->server->sin = (struct sockaddr *)&server;
+#else
request->server->sin = &server;
+#endif
}
/* sock_hostaddr - map endpoint address to printable form */
@@ -125,10 +144,33 @@
void sock_hostaddr(host)
struct host_info *host;
{
+#ifdef INET6
+ struct sockaddr *sin = host->sin;
+ char *ap;
+ int alen;
+
+ if (!sin)
+ return;
+ switch (sin->sa_family) {
+ case AF_INET:
+ ap = (char *)&((struct sockaddr_in *)sin)->sin_addr;
+ alen = sizeof(struct in_addr);
+ break;
+ case AF_INET6:
+ ap = (char *)&((struct sockaddr_in6 *)sin)->sin6_addr;
+ alen = sizeof(struct in6_addr);
+ break;
+ default:
+ return;
+ }
+ host->addr[0] = '\0';
+ inet_ntop(sin->sa_family, ap, host->addr, sizeof(host->addr));
+#else
struct sockaddr_in *sin = host->sin;
if (sin != 0)
STRN_CPY(host->addr, inet_ntoa(sin->sin_addr), sizeof(host->addr));
+#endif
}
/* sock_hostname - map endpoint address to host name */
@@ -136,8 +178,21 @@
void sock_hostname(host)
struct host_info *host;
{
+#ifdef INET6
+ struct sockaddr *sin = host->sin;
+ char addr[128];
+#ifdef USE_GETIPNODEBY
+ int h_error;
+#else
+ u_long res_options;
+#endif
+ struct hostent *hp = NULL;
+ char *ap;
+ int alen;
+#else
struct sockaddr_in *sin = host->sin;
struct hostent *hp;
+#endif
int i;
/*
@@ -147,11 +202,42 @@
* have to special-case 0.0.0.0, in order to avoid false alerts from the
* host name/address checking code below.
*/
+#ifdef INET6
+ if (sin != NULL) {
+ switch (sin->sa_family) {
+ case AF_INET:
+ if (((struct sockaddr_in *)sin)->sin_addr.s_addr == 0) {
+ strcpy(host->name, paranoid); /* name is bad, clobber it */
+ return;
+ }
+ ap = (char *) &((struct sockaddr_in *)sin)->sin_addr;
+ alen = sizeof(struct in_addr);
+ break;
+ case AF_INET6:
+ ap = (char *) &((struct sockaddr_in6 *)sin)->sin6_addr;
+ alen = sizeof(struct in6_addr);
+ break;
+ defalut:
+ strcpy(host->name, paranoid); /* name is bad, clobber it */
+ return;
+ }
+#ifdef USE_GETIPNODEBY
+ hp = getipnodebyaddr(ap, alen, sin->sa_family, &h_error);
+#else
+ hp = gethostbyaddr(ap, alen, sin->sa_family);
+#endif
+ }
+ if (hp) {
+#else
if (sin != 0 && sin->sin_addr.s_addr != 0
&& (hp = gethostbyaddr((char *) &(sin->sin_addr),
sizeof(sin->sin_addr), AF_INET)) != 0) {
+#endif
STRN_CPY(host->name, hp->h_name, sizeof(host->name));
+#if defined(INET6) && defined(USE_GETIPNODEBY)
+ freehostent(hp);
+#endif
/*
* Verify that the address is a member of the address list returned
@@ -166,15 +252,53 @@
* we're in big trouble anyway.
*/
+#ifdef INET6
+#ifdef USE_GETIPNODEBY
+ hp = getipnodebyname(host->name, sin->sa_family,
+ AI_V4MAPPED | AI_ADDRCONFIG | AI_ALL, &h_error);
+#else
+ if ((_res.options & RES_INIT) == 0) {
+ if (res_init() < 0) {
+ inet_ntop(sin->sa_family, ap, addr, sizeof(addr));
+ tcpd_warn("can't verify hostname: res_init() for %s failed",
+ addr);
+ strcpy(host->name, paranoid); /* name is bad, clobber it */
+ return;
+ }
+ }
+ res_options = _res.options;
+ if (sin->sa_family == AF_INET6)
+ _res.options |= RES_USE_INET6;
+ else
+ _res.options &= ~RES_USE_INET6;
+ hp = gethostbyname2(host->name,
+ (sin->sa_family == AF_INET6 &&
+ IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)sin)->sin6_addr)) ?
+ AF_INET : sin->sa_family);
+ _res.options = res_options;
+#endif
+ if (!hp) {
+#else
if ((hp = gethostbyname(host->name)) == 0) {
+#endif
/*
* Unable to verify that the host name matches the address. This
* may be a transient problem or a botched name server setup.
*/
+#ifdef INET6
+#ifdef USE_GETIPNODEBY
+ tcpd_warn("can't verify hostname: getipnodebyname(%s, %s) failed",
+#else
+ tcpd_warn("can't verify hostname: gethostbyname2(%s, %s) failed",
+#endif
+ host->name,
+ (sin->sa_family == AF_INET) ? "AF_INET" : "AF_INET6");
+#else
tcpd_warn("can't verify hostname: gethostbyname(%s) failed",
host->name);
+#endif
} else if (STR_NE(host->name, hp->h_name)
&& STR_NE(host->name, "localhost")) {
@@ -198,10 +322,19 @@
*/
for (i = 0; hp->h_addr_list[i]; i++) {
+#ifdef INET6
+ if (memcmp(hp->h_addr_list[i], ap, alen) == 0) {
+#ifdef USE_GETIPNODEBY
+ freehostent(hp);
+#endif
+ return; /* name is good, keep it */
+ }
+#else
if (memcmp(hp->h_addr_list[i],
(char *) &sin->sin_addr,
sizeof(sin->sin_addr)) == 0)
return; /* name is good, keep it */
+#endif
}
/*
@@ -210,10 +343,20 @@
* server.
*/
+#ifdef INET6
+ inet_ntop(sin->sa_family, ap, addr, sizeof(addr));
+ tcpd_warn("host name/address mismatch: %s != %.*s",
+ addr, STRING_LENGTH, hp->h_name);
+#else
tcpd_warn("host name/address mismatch: %s != %.*s",
inet_ntoa(sin->sin_addr), STRING_LENGTH, hp->h_name);
+#endif
}
strcpy(host->name, paranoid); /* name is bad, clobber it */
+#if defined(INET6) && defined(USE_GETIPNODEBY)
+ if (hp)
+ freehostent(hp);
+#endif
}
}
@@ -223,7 +366,11 @@
int fd;
{
char buf[BUFSIZ];
+#ifdef INET6
+ struct sockaddr_storage sin;
+#else
struct sockaddr_in sin;
+#endif
int size = sizeof(sin);
/*
--- tcpd.c
+++ tcpd.c
@@ -24,6 +24,7 @@
#include <stdio.h>
#include <syslog.h>
#include <string.h>
+#include <unistd.h>
#ifndef MAXPATHNAMELEN
#define MAXPATHNAMELEN BUFSIZ
@@ -120,7 +121,12 @@
/* Report request and invoke the real daemon program. */
+#ifdef INET6
+ syslog(allow_severity, "connect from %s (%s)",
+ eval_client(&request), eval_hostaddr(request.client));
+#else
syslog(allow_severity, "connect from %s", eval_client(&request));
+#endif
closelog();
(void) execv(path, argv);
syslog(LOG_ERR, "error: cannot execute %s: %m", path);
--- tcpd.h
+++ tcpd.h
@@ -17,7 +17,11 @@
struct host_info {
char name[STRING_LENGTH]; /* access via eval_hostname(host) */
char addr[STRING_LENGTH]; /* access via eval_hostaddr(host) */
+#ifdef INET6
+ struct sockaddr *sin; /* socket address or 0 */
+#else
struct sockaddr_in *sin; /* socket address or 0 */
+#endif
struct t_unitdata *unit; /* TLI transport address or 0 */
struct request_info *request; /* for shared information */
};
--- tcpdchk.c
+++ tcpdchk.c
@@ -22,6 +22,9 @@
#include <sys/types.h>
#include <sys/stat.h>
+#ifdef INET6
+#include <sys/socket.h>
+#endif
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
@@ -397,6 +400,26 @@
}
}
+#ifdef INET6
+static int is_inet6_addr(pat)
+ char *pat;
+{
+ struct in6_addr addr;
+ int len, ret;
+ char ch;
+
+ if (*pat != '[')
+ return (0);
+ len = strlen(pat);
+ if ((ch = pat[len - 1]) != ']')
+ return (0);
+ pat[len - 1] = '\0';
+ ret = inet_pton(AF_INET6, pat + 1, &addr);
+ pat[len - 1] = ch;
+ return (ret == 1);
+}
+#endif
+
/* check_host - criticize host pattern */
static int check_host(pat)
@@ -423,14 +446,27 @@
#endif
#endif
} else if (mask = split_at(pat, '/')) { /* network/netmask */
+#ifdef INET6
+ int mask_len;
+
+ if ((dot_quad_addr(pat) == INADDR_NONE
+ || dot_quad_addr(mask) == INADDR_NONE)
+ && (!is_inet6_addr(pat)
+ || ((mask_len = atoi(mask)) < 0 || mask_len > 128)))
+#else
if (dot_quad_addr(pat) == INADDR_NONE
|| dot_quad_addr(mask) == INADDR_NONE)
+#endif
tcpd_warn("%s/%s: bad net/mask pattern", pat, mask);
} else if (STR_EQ(pat, "FAIL")) { /* obsolete */
tcpd_warn("FAIL is no longer recognized");
tcpd_warn("(use EXCEPT or DENY instead)");
} else if (reserved_name(pat)) { /* other reserved */
/* void */ ;
+#ifdef INET6
+ } else if (is_inet6_addr(pat)) { /* IPv6 address */
+ addr_count = 1;
+#endif
} else if (NOT_INADDR(pat)) { /* internet name */
if (pat[strlen(pat) - 1] == '.') {
tcpd_warn("%s: domain or host name ends in dot", pat);
--- tcpdmatch.c
+++ tcpdmatch.c
@@ -68,8 +68,15 @@
int ch;
char *inetcf = 0;
int count;
+#ifdef INET6
+ struct sockaddr_storage server_sin;
+ struct sockaddr_storage client_sin;
+ char *ap;
+ int alen;
+#else
struct sockaddr_in server_sin;
struct sockaddr_in client_sin;
+#endif
struct stat st;
/*
@@ -173,12 +180,35 @@
if ((hp = find_inet_addr(server)) == 0)
exit(1);
memset((char *) &server_sin, 0, sizeof(server_sin));
+#ifdef INET6
+ server_sin.ss_family = hp->h_addrtype;
+ switch (hp->h_addrtype) {
+ case AF_INET:
+ ap = (char *)&((struct sockaddr_in *)&server_sin)->sin_addr;
+ alen = sizeof(struct sockaddr_in);
+ break;
+ case AF_INET6:
+ ap = (char *)&((struct sockaddr_in6 *)&server_sin)->sin6_addr;
+ alen = sizeof(struct sockaddr_in6);
+ break;
+ default:
+ exit(1);
+ }
+#ifdef SIN6_LEN
+ server_sin.ss_len = alen;
+#endif
+#else
server_sin.sin_family = AF_INET;
+#endif
request_set(&request, RQ_SERVER_SIN, &server_sin, 0);
for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
+#ifdef INET6
+ memcpy(ap, addr, alen);
+#else
memcpy((char *) &server_sin.sin_addr, addr,
sizeof(server_sin.sin_addr));
+#endif
/*
* Force evaluation of server host name and address. Host name
@@ -230,12 +260,35 @@
if ((hp = find_inet_addr(client)) == 0)
exit(1);
memset((char *) &client_sin, 0, sizeof(client_sin));
+#ifdef INET6
+ client_sin.ss_family = hp->h_addrtype;
+ switch (hp->h_addrtype) {
+ case AF_INET:
+ ap = (char *)&((struct sockaddr_in *)&client_sin)->sin_addr;
+ alen = sizeof(struct sockaddr_in);
+ break;
+ case AF_INET6:
+ ap = (char *)&((struct sockaddr_in6 *)&client_sin)->sin6_addr;
+ alen = sizeof(struct sockaddr_in6);
+ break;
+ default:
+ exit(1);
+ }
+#ifdef SIN6_LEN
+ client_sin.ss_len = alen;
+#endif
+#else
client_sin.sin_family = AF_INET;
+#endif
request_set(&request, RQ_CLIENT_SIN, &client_sin, 0);
for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
+#ifdef INET6
+ memcpy(ap, addr, alen);
+#else
memcpy((char *) &client_sin.sin_addr, addr,
sizeof(client_sin.sin_addr));
+#endif
/*
* Force evaluation of client host name and address. Host name
--- update.c
+++ update.c
@@ -46,10 +46,18 @@
request->fd = va_arg(ap, int);
continue;
case RQ_CLIENT_SIN:
+#ifdef INET6
+ request->client->sin = va_arg(ap, struct sockaddr *);
+#else
request->client->sin = va_arg(ap, struct sockaddr_in *);
+#endif
continue;
case RQ_SERVER_SIN:
+#ifdef INET6
+ request->server->sin = va_arg(ap, struct sockaddr *);
+#else
request->server->sin = va_arg(ap, struct sockaddr_in *);
+#endif
continue;
/*
--- workarounds.c
+++ workarounds.c
@@ -166,11 +166,22 @@
int *len;
{
int ret;
+#ifdef INET6
+ struct sockaddr_storage *sin = (struct sockaddr_storage *) sa;
+#else
struct sockaddr_in *sin = (struct sockaddr_in *) sa;
+#endif
if ((ret = getpeername(sock, sa, len)) >= 0
+#ifdef INET6
+ && ((sin->__ss_family == AF_INET6
+ && IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)sin)->sin6_addr))
+ || (sin->ss_family == AF_INET
+ && ((struct sockaddr_in *)sin)->sin_addr.s_addr == 0))) {
+#else
&& sa->sa_family == AF_INET
&& sin->sin_addr.s_addr == 0) {
+#endif
errno = ENOTCONN;
return (-1);
} else {
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