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tcpd
tcp_wrappers_7.6-ipv6-1.6.diff
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File tcp_wrappers_7.6-ipv6-1.6.diff of Package tcpd
;; 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.orig +++ fix_options.c @@ -11,6 +11,9 @@ static char sccsid[] = "@(#) fix_options #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 @@ struct request_info *request; 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.orig +++ hosts_access.5 @@ -85,10 +85,17 @@ member of the specified netgroup. Netgro 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.orig +++ hosts_access.c @@ -25,6 +25,9 @@ static char sccsid[] = "@(#) hosts_acces #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 client_match(); 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 @@ char *string; { 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 @@ char *string; } 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 @@ char *string; 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.orig +++ inetcf.c @@ -26,6 +26,9 @@ extern void exit(); * 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.orig +++ misc.c @@ -58,9 +58,31 @@ int delimiter; { 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.orig +++ refuse.c @@ -25,7 +25,12 @@ static char sccsid[] = "@(#) refuse.c 1. 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.orig +++ rfc931.c @@ -68,20 +68,50 @@ int sig; /* 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 @@ char *dest; * 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 @@ char *dest; * 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 @@ char *dest; 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 @@ char *dest; */ 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 @@ char *dest; && 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.orig +++ scaffold.c @@ -20,6 +20,9 @@ static char sccs_id[] = "@(#) scaffold.c #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 @@ struct hostent *hp; /* 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 @@ struct hostent *hp; 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 @@ struct hostent *hp; 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 @@ char *host; 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 @@ char *host; 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 @@ int check_dns(host) 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 @@ char *host; 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.orig +++ socket.c @@ -30,6 +30,12 @@ static char sccsid[] = "@(#) socket.c 1. #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 @@ char *name; 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 @@ struct request_info *request; 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 @@ struct request_info *request; 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 @@ struct request_info *request; 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 @@ struct host_info *host; 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 @@ struct host_info *host; * 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 @@ struct host_info *host; * 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 @@ struct host_info *host; */ 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 @@ struct host_info *host; * 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 @@ static void sock_sink(fd) int fd; { char buf[BUFSIZ]; +#ifdef INET6 + struct sockaddr_storage sin; +#else struct sockaddr_in sin; +#endif int size = sizeof(sin); /* --- tcpd.c.orig +++ tcpd.c @@ -24,6 +24,7 @@ static char sccsid[] = "@(#) tcpd.c 1.10 #include <stdio.h> #include <syslog.h> #include <string.h> +#include <unistd.h> #ifndef MAXPATHNAMELEN #define MAXPATHNAMELEN BUFSIZ @@ -120,7 +121,12 @@ char **argv; /* 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.orig +++ 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.orig +++ tcpdchk.c @@ -22,6 +22,9 @@ static char sccsid[] = "@(#) tcpdchk.c 1 #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 @@ char *pat; } } +#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 @@ char *pat; #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.orig +++ tcpdmatch.c @@ -68,8 +68,15 @@ char **argv; 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 @@ char **argv; 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 @@ char **argv; 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.orig +++ update.c @@ -46,10 +46,18 @@ va_list ap; 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.orig +++ workarounds.c @@ -166,11 +166,22 @@ struct sockaddr *sa; 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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