--- /dev/null
+diff -Nur sendmail-8.9.3/src/conf.c sendmail-8.9.3.pld/src/conf.c
+--- sendmail-8.9.3/src/conf.c Wed Feb 10 18:23:27 1999
++++ sendmail-8.9.3.pld/src/conf.c Wed Feb 10 18:22:45 1999
+@@ -284,6 +284,8 @@
+ ColonOkInAddr = TRUE;
+ DontLockReadFiles = TRUE;
+ DoubleBounceAddr = "postmaster";
++ DetectTelnet = FALSE;
++ ExitOnTelnet = TRUE;
+ MaxHeadersLength = MAXHDRSLEN;
+ snprintf(buf, sizeof buf, "%s%sdead.letter",
+ _PATH_VARTMP,
+diff -Nur sendmail-8.9.3/src/err.c sendmail-8.9.3.pld/src/err.c
+--- sendmail-8.9.3/src/err.c Tue Dec 29 18:42:18 1998
++++ sendmail-8.9.3.pld/src/err.c Wed Feb 10 18:18:33 1999
+@@ -543,15 +543,18 @@
+ (void) snprintf(eb, spaceleft, "%s... ",
+ shortenstring(to, MAXSHORTSTR));
+ spaceleft -= strlen(eb);
++ /*
+ while (*eb != '\0')
+ *eb++ &= 0177;
++ */
+ }
+
+ /* output the message */
+ (void) vsnprintf(eb, spaceleft, fmt, ap);
+ spaceleft -= strlen(eb);
+- while (*eb != '\0')
++/* while (*eb != '\0')
+ *eb++ &= 0177;
++*/
+
+ /* output the error code, if any */
+ if (eno != 0)
+diff -Nur sendmail-8.9.3/src/readcf.c sendmail-8.9.3.pld/src/readcf.c
+--- sendmail-8.9.3/src/readcf.c Fri Jan 29 00:28:53 1999
++++ sendmail-8.9.3.pld/src/readcf.c Wed Feb 10 18:18:33 1999
+@@ -1523,6 +1523,10 @@
+ #define O_MAXMIMEHDRLEN 0xa8
+ { "MaxMimeHeaderLength", O_MAXMIMEHDRLEN, FALSE },
+ #endif
++#define O_DETECTTELNET 0xa6
++ { "DetectTelnet", O_DETECTTELNET, TRUE },
++#define O_EXITONTELNET 0xa7
++ { "ExitOnTelnet", O_EXITONTELNET, TRUE },
+ #if _FFR_CONTROL_SOCKET
+ #define O_CONTROLSOCKET 0xa9
+ { "ControlSocketName", O_CONTROLSOCKET, FALSE },
+@@ -2479,6 +2483,13 @@
+ printf("Warning: MaxHeadersLength: headers length limit set lower than %d\n", MAXHDRSLEN);
+ break;
+ #endif
++ case O_DETECTTELNET: /* detect telnet */
++ DetectTelnet = atobool(val);
++ break;
++
++ case O_EXITONTELNET: /* exit if telnet detected */
++ ExitOnTelnet = atobool(val);
++ break;
+
+ default:
+ if (tTd(37, 1))
+diff -Nur sendmail-8.9.3/src/sendmail.h sendmail-8.9.3.pld/src/sendmail.h
+--- sendmail-8.9.3/src/sendmail.h Wed Feb 10 18:23:27 1999
++++ sendmail-8.9.3.pld/src/sendmail.h Wed Feb 10 18:18:33 1999
+@@ -1182,6 +1182,8 @@
+ EXTERN bool UseNameServer; /* using DNS -- interpret h_errno & MX RRs */
+ EXTERN bool UseHesiod; /* using Hesiod -- interpret Hesiod errors */
+ EXTERN bool SevenBitInput; /* force 7-bit data on input */
++EXTERN bool DetectTelnet; /* force telnet detection on/off */
++EXTERN bool ExitOnTelnet; /* exit if telnet detected */
+ EXTERN bool HasEightBits; /* has at least one eight bit input byte */
+ EXTERN bool ConfigFileRead; /* configuration file has been read */
+ EXTERN time_t SafeAlias; /* interval to wait until @:@ in alias file */
+diff -Nur sendmail-8.9.3/src/srvrsmtp.c sendmail-8.9.3.pld/src/srvrsmtp.c
+--- sendmail-8.9.3/src/srvrsmtp.c Tue Dec 29 18:42:21 1998
++++ sendmail-8.9.3.pld/src/srvrsmtp.c Wed Feb 10 18:18:33 1999
+@@ -21,6 +21,7 @@
+ #endif /* not lint */
+
+ # include <errno.h>
++#include <arpa/telnet.h>
+
+ # if SMTP
+
+@@ -139,6 +140,9 @@
+ QUEUE_CHAR *new;
+ char inp[MAXLINE];
+ char cmdbuf[MAXLINE];
++ char telnet_request[] = {IAC, DO, TELOPT_SGA, 0};
++ char telnet_response[] = {IAC, WILL, TELOPT_SGA, 0};
++ char *telnet_tmp;
+ extern ENVELOPE BlankEnvelope;
+ extern void help __P((char *));
+ extern void settime __P((ENVELOPE *));
+@@ -182,8 +186,15 @@
+ id = strchr(inp, ' ');
+ if (id == NULL)
+ id = &inp[strlen(inp)];
+- cmd = p == NULL ? "220 %.*s ESMTP%s" : "220-%.*s ESMTP%s";
+- message(cmd, id - inp, inp, id);
++ if (DetectTelnet)
++ {
++ cmd = p == NULL ? "220 %.*s ESMTP%s%s" : "220-%.*s ESMTP%s%s";
++ message(cmd, id - inp, inp, id, telnet_request);
++ } else
++ {
++ cmd = p == NULL ? "220 %.*s ESMTP%s" : "220-%.*s ESMTP%s";
++ message(cmd, id - inp, inp, id);
++ }
+
+ /* output remaining lines */
+ while ((id = p) != NULL && (p = strchr(id, '\n')) != NULL)
+@@ -253,6 +264,20 @@
+ ExitStat = EX_QUIT;
+ finis(TRUE, ExitStat);
+ }
++
++ if (DetectTelnet && strlen(inp) >= 3)
++ for (telnet_tmp = inp; *(telnet_tmp+2); telnet_tmp++)
++ if (!strncmp(telnet_tmp, telnet_response, 3))
++ {
++ sm_syslog(LOG_CRIT, e->e_id,
++ "telnet detected from from %.100s (%.100s)",
++ CurSmtpClient, anynet_ntoa(&RealHostAddr));
++ if (ExitOnTelnet)
++ {
++ message("571 Unauthorized usage prohibited");
++ goto doquit;
++ }
++ }
+
+ /* clean up end of line */
+ fixcrlf(inp, TRUE);
--- /dev/null
+diff -Nur sendmail-8.9.3/cf/m4/proto.m4 sendmail-8.9.3.pld/cf/m4/proto.m4
+--- sendmail-8.9.3/cf/m4/proto.m4 Wed Feb 3 00:21:30 1999
++++ sendmail-8.9.3.pld/cf/m4/proto.m4 Wed Feb 10 18:11:17 1999
+@@ -1111,6 +1111,7 @@
+ ifdef(`_RBL_', `dnl
+ # DNS based IP address spam lists
+ R$* $: $&{client_addr}
++R::ffff:$-.$-.$-.$- $: $(host $4.$3.$2.$1._RBL_. $: OK $)
+ R$-.$-.$-.$- $: $(host $4.$3.$2.$1._RBL_. $: OK $)
+ ROK $@ OK
+ R$+ $#error $@ 5.7.1 $: "Mail from " $&{client_addr} " refused by blackhole site _RBL_"',
+diff -Nur sendmail-8.9.3/src/conf.c sendmail-8.9.3.pld/src/conf.c
+--- sendmail-8.9.3/src/conf.c Wed Jan 27 01:15:52 1999
++++ sendmail-8.9.3.pld/src/conf.c Wed Feb 10 18:11:17 1999
+@@ -4085,6 +4085,33 @@
+ }
+
+ #endif
++/*
++** SM_GETHOSTBYNAME2 -- Wrapper for gethostbyname() with IPv6 support
++**
++** Most modern resolver libraries (BIND 8.1.x, glibc 2.1.x) will already
++** return an AF_INET6 hostent if RES_USE_INET6 is set in _res.options.
++** They usually try something like gethostbyname2(name, AF_INET6) and,
++** if that fails, return the result of gethostbyname2(name, AF_INET).
++**
++** IPv6 code elsewhere should have set RES_USE_INET6 if it is defined.
++** If it isn't defined, we simulate that behavior ourself.
++**
++** You can *not* assume that the hostent returned will only be AF_INET.
++*/
++struct hostent *
++sm_gethostbyname2(name)
++ char *name;
++{
++#if NETINET6 && !defined(RES_USE_INET6)
++ struct hostent *h;
++
++ h = gethostbyname2(name, AF_INET6);
++ if (h)
++ return h;
++#endif
++ return gethostbyname(name);
++}
++
+ \f/*
+ ** SM_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX
+ **
+@@ -4123,7 +4150,7 @@
+
+ if (tTd(61, 10))
+ printf("gethostbyname(%s)... ", name);
+- h = gethostbyname(name);
++ h = sm_gethostbyname2(name);
+ if (h == NULL)
+ {
+ if (tTd(61, 10))
+@@ -4147,7 +4174,7 @@
+ {
+ if (tTd(61, 10))
+ printf("gethostbyname(%s)... ", hbuf);
+- h = gethostbyname(hbuf);
++ h = sm_gethostbyname2(hbuf);
+ }
+ }
+ }
+@@ -4301,7 +4328,12 @@
+ hp = sm_gethostbyaddr((char *) &sa->sin.sin_addr,
+ sizeof(sa->sin.sin_addr), sa->sa.sa_family);
+ break;
+-
++#if INET6
++ case AF_INET6:
++ hp = sm_gethostbyaddr((char *) &sa->sin6.sin6_addr,
++ sizeof(sa->sin6.sin6_addr), sa->sa.sa_family);
++ break;
++#endif
+ default:
+ #if _FFR_LOG_UNSUPPORTED_FAMILIES
+ /* XXX: Give warning about unsupported family */
+@@ -4378,6 +4410,104 @@
+ # include <net/if.h>
+ #endif
+
++#if defined(__linux__) && NETINET6
++
++/*
++ * This is a terrible, linux-specific kludge. In linux-2.1.105 at least,
++ * there is no way to get IPv6 addresses via SIOCGIFCONF. You can
++ * set them, but not retrieve them. I haven't seen a standard way
++ * to retrieve the list yet. If you use the /proc/net/if_inet6 file,
++ * you can get a list of them in a format like this:
++ *
++ * 00000000000000000000000000000001 01 80 10 80 lo
++ * fe800000000000000000006097df4915 02 0a 20 80 eth0
++ * fe80000000000000026097fffedf4915 02 0a 20 80 eth0
++ */
++void
++load_if_names6()
++{
++ static FILE *fp = NULL;
++ char ip_addr[256];
++ static int s = -1;
++
++ if (tTd(0, 40))
++ printf( "linux load_if_names6() kludge...\n" );
++
++ if (s != -1)
++ close(s);
++ s = socket(AF_INET6, SOCK_DGRAM, 0);
++ if (s == -1)
++ return;
++
++ if (fp)
++ (void) fclose( fp );
++ fp = fopen( "/proc/net/if_inet6", "r" );
++ if (fp)
++ {
++ SOCKADDR sa;
++ struct in6_addr *in6 = &sa.sin6.sin6_addr;
++ char devname[10];
++ int plen, scope, dad_status, if_idx;
++
++ while( fscanf( fp,
++ "%4x%4x%4x%4x%4x%4x%4x%4x %02x %02x %02x %02x %s\n",
++ &in6->s6_addr16[0], &in6->s6_addr16[1],
++ &in6->s6_addr16[2], &in6->s6_addr16[3],
++ &in6->s6_addr16[4], &in6->s6_addr16[5],
++ &in6->s6_addr16[6], &in6->s6_addr16[7],
++ &if_idx, &plen, &scope, &dad_status, devname) != EOF)
++ {
++ struct hostent *hp;
++ int i;
++ struct ifreq ifrf;
++
++ for (i = 0; i < 8; i++)
++ in6->s6_addr16[i] = ntohs( in6->s6_addr16[i] );
++ sa.sa.sa_family = AF_INET6;
++
++ /* save IP address in text from */
++ (void) snprintf(ip_addr, sizeof ip_addr, "[%.*s]",
++ sizeof ip_addr - 3, anynet_ntoa( &sa ) );
++
++ if (tTd(0, 40))
++ printf("%s\n\ta.k.a.: %s\n", devname, ip_addr );
++
++ if (!wordinclass(ip_addr, 'w'))
++ setclass('w', ip_addr);
++
++ bzero(&ifrf, sizeof( ifrf ));
++ strncpy(ifrf.ifr_name, devname, sizeof(ifrf.ifr_name));
++ ioctl(s, SIOCGIFFLAGS, (char *) &ifrf);
++ if (tTd(0, 41))
++ printf("\tflags: %x\n", ifrf.ifr_flags);
++
++ /* skip "loopback" interface "lo" */
++ if (bitset(IFF_LOOPBACK, ifrf.ifr_flags))
++ continue;
++
++ /*
++ * If we skip the loopback interfaces, then
++ * <draft-ietf-ngtrans-6bone-routing-01.txt>
++ * would tend to indicate that we should skip
++ * the link-local prefix (FE80::/10) as well.
++ */
++ if ((ntohs(*(in6->s6_addr16)) & 0xFFC0) == 0xFE80)
++ continue;
++
++ (void) add_hostnames( &sa );
++ }
++
++ (void) fclose(fp);
++ fp = NULL;
++ }
++
++ close(s);
++
++ return;
++}
++
++#endif
++
+ void
+ load_if_names()
+ {
+@@ -4386,7 +4516,9 @@
+ int i;
+ struct ifconf ifc;
+ int numifs;
+-
++#if NETINET6
++ load_if_names6();
++#endif
+ s = socket(AF_INET, SOCK_DGRAM, 0);
+ if (s == -1)
+ return;
+@@ -4768,6 +4900,9 @@
+ #if NETINET
+ "NETINET",
+ #endif
++#if NETINET6
++ "NETINET6",
++#endif
+ #if NETINFO
+ "NETINFO",
+ #endif
+diff -Nur sendmail-8.9.3/src/conf.h sendmail-8.9.3.pld/src/conf.h
+--- sendmail-8.9.3/src/conf.h Fri Jan 29 00:28:34 1999
++++ sendmail-8.9.3.pld/src/conf.h Wed Feb 10 18:11:17 1999
+@@ -84,6 +84,10 @@
+ # define NETINET 1 /* include internet support */
+ # endif
+
++# ifndef NETINET6
++# define NETINET6 0 /* dont include IPv6 support */
++# endif
++
+ # ifndef NETISO
+ # define NETISO 0 /* do not include ISO socket support */
+ # endif
+@@ -1307,6 +1311,14 @@
+ # endif
+ # include <sys/sysmacros.h>
+ # undef atol /* wounded in <stdlib.h> */
++# if NETINET6
++# if !((__GLIBC__ == 2) && (__GLIBC_MINOR__ == 1)) /* Native in 2.2.x */
++# include <linux/in6.h> /* IPv6 support */
++# endif
++# ifdef __GLIBC__
++# undef IPPROTO_ICMPV6 /* linux #defines, glibc enums */
++# endif
++# endif
+ #endif
+
+
+diff -Nur sendmail-8.9.3/src/daemon.c sendmail-8.9.3.pld/src/daemon.c
+--- sendmail-8.9.3/src/daemon.c Tue Jan 26 05:00:16 1999
++++ sendmail-8.9.3.pld/src/daemon.c Wed Feb 10 18:11:17 1999
+@@ -135,7 +135,17 @@
+ DaemonAddr.sin.sin_addr.s_addr = INADDR_ANY;
+ port = DaemonAddr.sin.sin_port;
+ break;
+-
++#if NETINET6
++ case AF_INET6:
++ /*
++ * We should look up and handle the INADDR_ANY situation
++ * for IPv6, but since it is usually all-zeros and
++ * that is what we're checking for, it doesn't have
++ * a high priority.
++ */
++ port = DaemonAddr.sin6.sin6_port;
++ break;
++#endif
+ default:
+ /* unknown protocol */
+ port = 0;
+@@ -160,7 +170,11 @@
+ case AF_INET:
+ DaemonAddr.sin.sin_port = port;
+ break;
+-
++#if NETINET6
++ case AF_INET6:
++ DaemonAddr.sin6.sin6_port = port;
++ break;
++#endif
+ default:
+ /* unknown protocol */
+ break;
+@@ -603,6 +617,12 @@
+ break;
+ # endif
+
++# if NETINET6
++ case AF_INET6:
++ socksize = sizeof DaemonAddr.sin6;
++ break;
++# endif
++
+ # if NETISO
+ case AF_ISO:
+ socksize = sizeof DaemonAddr.siso;
+@@ -703,6 +723,10 @@
+ else if (strcasecmp(v, "inet") == 0)
+ DaemonAddr.sa.sa_family = AF_INET;
+ #endif
++#if NETINET6
++ else if (strcasecmp(v, "inet6") == 0)
++ DaemonAddr.sa.sa_family = AF_INET6;
++#endif
+ #if NETISO
+ else if (strcasecmp(v, "iso") == 0)
+ DaemonAddr.sa.sa_family = AF_ISO;
+@@ -739,6 +763,27 @@
+ break;
+ #endif
+
++#if NETINET6
++ case AF_INET6:
++ if (isascii(*v) && isdigit(*v))
++ (void) inet_pton(
++ DaemonAddr.sa.sa_family, v,
++ &DaemonAddr.sin6.sin6_addr);
++ else
++ {
++ register struct hostent *hp;
++
++ hp = sm_gethostbyname(v);
++ if (hp == NULL)
++ syserr("554 host \"%s\" unknown", v);
++ else
++ bcopy(hp->h_addr,
++ &DaemonAddr.sin6.sin6_addr,
++ IN6ADDRSZ);
++ }
++ break;
++#endif
++
+ default:
+ syserr("554 Address= option unsupported for family %d",
+ DaemonAddr.sa.sa_family);
+@@ -770,6 +815,22 @@
+ break;
+ #endif
+
++#if NETINET6
++ case AF_INET6:
++ if (isascii(*v) && isdigit(*v))
++ DaemonAddr.sin6.sin6_port = htons(atoi(v));
++ else
++ {
++ register struct servent *sp;
++
++ sp = getservbyname(v, "tcp");
++ if (sp == NULL)
++ syserr("554 service \"%s\" unknown", v);
++ else
++ DaemonAddr.sin6.sin6_port = sp->s_port;
++ }
++ break;
++#endif
+ #if NETISO
+ case AF_ISO:
+ /* assume two byte transport selector */
+@@ -968,6 +1029,35 @@
+ break;
+ #endif
+
++#if NETINET6
++ case AF_INET6:
++ {
++ /*
++ * IPv4-mapped IPv6 prefix -- ::ffff:0
++ */
++ static u_char mapbuf[ IN6ADDRSZ ] =
++ { 0,0,0,0, 0,0,0,0, 0,0,0xFF,0xFF, 0,0,0,0 };
++ u_char *a = (u_char *) hp->h_addr;
++
++ /*
++ * Some platforms may try to connect to IPv4-mapped
++ * IPv6 addresses via IPv6 connections, which
++ * won't work in many cases. If we detect that,
++ * avoid it by changing the address family.
++ */
++ if (bcmp( mapbuf, a, IN6ADDRSZ - INADDRSZ ))
++ bcopy(a, &addr.sin6.sin6_addr, IN6ADDRSZ);
++ else
++ {
++ bcopy(a + IN6ADDRSZ - INADDRSZ,
++ &addr.sin.sin_addr,
++ INADDRSZ);
++ addr.sa.sa_family = AF_INET;
++ }
++ break;
++ }
++#endif
++
+ default:
+ if (hp->h_length > sizeof addr.sa.sa_data)
+ {
+@@ -1012,6 +1102,13 @@
+ break;
+ #endif
+
++#if NETINET6
++ case AF_INET6:
++ addr.sin6.sin6_port = port;
++ addrlen = sizeof (struct sockaddr_in6);
++ break;
++#endif
++
+ #if NETISO
+ case AF_ISO:
+ /* assume two byte transport selector */
+@@ -1157,6 +1254,14 @@
+ break;
+ #endif
+
++#if NETINET6
++ case AF_INET6:
++ bcopy(hp->h_addr_list[addrno++],
++ &addr.sin6.sin6_addr,
++ IN6ADDRSZ);
++ break;
++#endif
++
+ default:
+ bcopy(hp->h_addr_list[addrno++],
+ addr.sa.sa_data,
+@@ -1295,6 +1400,34 @@
+ if (hp->h_addrtype == AF_INET)
+ return bcmp(ha, (char *) &sa->sin.sin_addr, hp->h_length);
+ break;
++#if NETINET6
++ case AF_INET6:
++ {
++ u_char *a = (u_char *) &sa->sin6.sin6_addr;
++ /*
++ * Straight binary comparison
++ */
++ if (hp->h_addrtype == AF_INET6)
++ return bcmp( ha, a, hp->h_length);
++
++ /*
++ * If IPv4-mapped IPv6 address, compare the IPv4 section
++ */
++ if (hp->h_addrtype == AF_INET)
++ {
++ /*
++ * IPv4-mapped IPv6 prefix -- ::ffff:0
++ */
++ static u_char mapbuf[ IN6ADDRSZ ] =
++ { 0,0,0,0, 0,0,0,0, 0,0,0xFF,0xFF, 0,0,0,0 };
++
++ if (!bcmp( mapbuf, a, IN6ADDRSZ - INADDRSZ ))
++ return bcmp(a + IN6ADDRSZ - INADDRSZ, ha, INADDRSZ);
++ return -1;
++ }
++ break;
++ }
++#endif
+
+ }
+ return -1;
+@@ -2049,6 +2182,12 @@
+ return inet_ntoa(sap->sin.sin_addr);
+ #endif
+
++#if NETINET6
++ case AF_INET6:
++ return (char *) inet_ntop( sap->sa.sa_family,
++ &sap->sin6.sin6_addr, buf, sizeof( buf ));
++#endif
++
+ #if NETLINK
+ case AF_LINK:
+ snprintf(buf, sizeof buf, "[LINK: %s]",
+@@ -2106,6 +2245,14 @@
+ hp = sm_gethostbyaddr((char *) &sap->sin.sin_addr,
+ INADDRSZ,
+ AF_INET);
++ break;
++#endif
++
++#if NETINET6
++ case AF_INET6:
++ hp = sm_gethostbyaddr((char *) &sap->sin6.sin6_addr,
++ IN6ADDRSZ,
++ AF_INET6);
+ break;
+ #endif
+
+diff -Nur sendmail-8.9.3/src/main.c sendmail-8.9.3.pld/src/main.c
+--- sendmail-8.9.3/src/main.c Sun Jan 10 00:31:13 1999
++++ sendmail-8.9.3.pld/src/main.c Wed Feb 10 18:11:17 1999
+@@ -457,6 +457,9 @@
+ # ifdef RES_NOALIASES
+ _res.options |= RES_NOALIASES;
+ # endif
++# if NETINET6 && defined(RES_USE_INET6)
++ _res.options |= RES_USE_INET6;
++# endif
+ #endif
+
+ errno = 0;
+@@ -1513,10 +1516,20 @@
+ define(macid("{client_name}", NULL), RealHostName, &BlankEnvelope);
+ define(macid("{client_addr}", NULL),
+ newstr(anynet_ntoa(&RealHostAddr)), &BlankEnvelope);
+- if (RealHostAddr.sa.sa_family == AF_INET)
++ switch( RealHostAddr.sa.sa_family )
++ {
++ case AF_INET:
+ snprintf(pbuf, sizeof pbuf, "%d", RealHostAddr.sin.sin_port);
+- else
++ break;
++#if NETINET6
++ case AF_INET6:
++ snprintf(pbuf, sizeof pbuf, "%d", RealHostAddr.sin6.sin6_port);
++ break;
++#endif
++ default:
+ snprintf(pbuf, sizeof pbuf, "0");
++ break;
++ }
+ define(macid("{client_port}", NULL), newstr(pbuf), &BlankEnvelope);
+
+ /* initialize maps now for check_relay ruleset */
+diff -Nur sendmail-8.9.3/src/sendmail.h sendmail-8.9.3.pld/src/sendmail.h
+--- sendmail-8.9.3/src/sendmail.h Wed Jan 27 01:15:52 1999
++++ sendmail-8.9.3.pld/src/sendmail.h Wed Feb 10 18:11:17 1999
+@@ -55,6 +55,10 @@
+ # if NETINET
+ # include <netinet/in.h>
+ # endif
++# if NETINET6
++/* There is no host-independet location (yet). See conf.h */
++# endif
++
+ # if NETISO
+ # include <netiso/iso.h>
+ # endif
+@@ -1035,6 +1039,9 @@
+ #endif
+ #if NETINET
+ struct sockaddr_in sin; /* INET family */
++#endif
++#if NETINET6
++ struct sockaddr_in6 sin6; /* INET/IPv6 */
+ #endif
+ #if NETISO
+ struct sockaddr_iso siso; /* ISO family */
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