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Update.
2000-07-26 Ulrich Drepper <drepper@redhat.com> * resolv/res_init.c: Add support for nameserver communication with IPv6. * resolv/res_send.c: Likewise. * resolv/resolv.h (struct __res_state): Store IPv6 address, not IPv4 in nsaddrs field. Patch by <venaas@nvg.ntnu.no>.
This commit is contained in:
Ulrich Drepper
parent
ec08818d20
commit
438e82396b
@ -1,3 +1,12 @@
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2000-07-26 Ulrich Drepper <drepper@redhat.com>
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* resolv/res_init.c: Add support for nameserver communication with
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IPv6.
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* resolv/res_send.c: Likewise.
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* resolv/resolv.h (struct __res_state): Store IPv6 address, not IPv4
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in nsaddrs field.
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Patch by <venaas@nvg.ntnu.no>.
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2000-07-25 Bruno Haible <haible@clisp.cons.org>
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* locale/programs/ld-ctype.c (wctype_table_get): New function.
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@ -143,6 +143,9 @@ __res_vinit(res_state statp, int preinit) {
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register int n;
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char buf[BUFSIZ];
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int nserv = 0; /* number of nameserver records read from file */
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#ifdef _LIBC
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int nservall = 0; /* number of NS records read, nserv IPv4 only */
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#endif
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int haveenv = 0;
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int havesearch = 0;
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#ifdef RESOLVSORT
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@ -175,6 +178,11 @@ __res_vinit(res_state statp, int preinit) {
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statp->qhook = NULL;
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statp->rhook = NULL;
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statp->_u._ext.nscount = 0;
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#ifdef _LIBC
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statp->_u._ext.nscount6 = 0;
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for (n = 0; n < MAXNS; n++)
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statp->_u._ext.nsaddrs[n] = NULL;
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#endif
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/* Allow user to override the local domain definition */
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if ((cp = __secure_getenv("LOCALDOMAIN")) != NULL) {
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@ -276,7 +284,11 @@ __res_vinit(res_state statp, int preinit) {
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continue;
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}
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/* read nameservers to query */
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#ifdef _LIBC
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if (MATCH(buf, "nameserver") && nservall < MAXNS) {
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#else
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if (MATCH(buf, "nameserver") && nserv < MAXNS) {
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#endif
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struct in_addr a;
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cp = buf + sizeof("nameserver") - 1;
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@ -288,6 +300,30 @@ __res_vinit(res_state statp, int preinit) {
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statp->nsaddr_list[nserv].sin_port =
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htons(NAMESERVER_PORT);
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nserv++;
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#ifdef _LIBC
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nservall++;
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} else {
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struct in6_addr a6;
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char *el;
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if ((el = strchr(cp, '\n')) != NULL)
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*el = '\0';
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if ((*cp != '\0') &&
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(inet_pton(AF_INET6, cp, &a6) > 0)) {
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struct sockaddr_in6 *sa6;
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sa6 = malloc(sizeof(*sa6));
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if (sa6 != NULL) {
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sa6->sin6_addr = a6;
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sa6->sin6_family = AF_INET6;
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sa6->sin6_port = htons(NAMESERVER_PORT);
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statp->_u._ext.nsaddrs[nservall] = sa6;
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statp->_u._ext.nstimes[nservall] = RES_MAXTIME;
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statp->_u._ext.nssocks[nservall] = -1;
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nservall++;
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}
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}
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#endif
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}
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continue;
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}
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@ -341,6 +377,10 @@ __res_vinit(res_state statp, int preinit) {
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}
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if (nserv > 1)
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statp->nscount = nserv;
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#ifdef _LIBC
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if (nservall - nserv > 0)
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statp->_u._ext.nscount6 = nservall - nserv;
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#endif
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#ifdef RESOLVSORT
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statp->nsort = nsort;
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#endif
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@ -491,7 +531,13 @@ res_nclose(res_state statp) {
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statp->_vcsock = -1;
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statp->_flags &= ~(RES_F_VC | RES_F_CONN);
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}
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for (ns = 0; ns < statp->_u._ext.nscount; ns++) {
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#ifdef _LIBC
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for (ns = 0; ns < statp->_u._ext.nscount + statp->_u._ext.nscount6;
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ns++)
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#else
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for (ns = 0; ns < statp->_u._ext.nscount; ns++)
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#endif
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{
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if (statp->_u._ext.nssocks[ns] != -1) {
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(void) close(statp->_u._ext.nssocks[ns]);
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statp->_u._ext.nssocks[ns] = -1;
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@ -202,7 +202,11 @@ static void Aerror(const res_state, FILE *, const char *, int,
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struct sockaddr_in);
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static void Perror(const res_state, FILE *, const char *, int);
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#endif
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#ifdef _LIBC
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static int sock_eq(struct sockaddr_in6 *, struct sockaddr_in6 *);
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#else
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static int sock_eq(struct sockaddr_in *, struct sockaddr_in *);
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#endif
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#ifdef NEED_PSELECT
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static int pselect(int, void *, void *, void *,
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struct timespec *,
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@ -211,6 +215,9 @@ static int pselect(int, void *, void *, void *,
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/* Reachover. */
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#ifdef _LIBC
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static void convaddr4to6(struct sockaddr_in6 *sa);
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#endif
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void res_pquery(const res_state, const u_char *, int, FILE *);
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/* Public. */
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@ -225,10 +232,42 @@ void res_pquery(const res_state, const u_char *, int, FILE *);
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* paul vixie, 29may94
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*/
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int
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res_ourserver_p(const res_state statp, const struct sockaddr_in *inp) {
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#ifdef _LIBC
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res_ourserver_p(const res_state statp, const struct sockaddr_in6 *inp)
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#else
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res_ourserver_p(const res_state statp, const struct sockaddr_in *inp)
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#endif
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{
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struct sockaddr_in ina;
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int ns;
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#ifdef _LIBC
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if (inp->sin6_family == AF_INET) {
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ina = *(struct sockaddr_in *)inp;
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for (ns = 0; ns < MAXNS; ns++) {
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const struct sockaddr_in *srv =
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(struct sockaddr_in *)EXT(statp).nsaddrs[ns];
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if ((srv != NULL) && (srv->sin_family == AF_INET) &&
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(srv->sin_port == ina.sin_port) &&
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(srv->sin_addr.s_addr == INADDR_ANY ||
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srv->sin_addr.s_addr == ina.sin_addr.s_addr))
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return (1);
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}
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} else if (inp->sin6_family == AF_INET6) {
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for (ns = 0; ns < MAXNS; ns++) {
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const struct sockaddr_in6 *srv = EXT(statp).nsaddrs[ns];
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if ((srv != NULL) && (srv->sin6_family == AF_INET6) &&
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(srv->sin6_port == inp->sin6_port) &&
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!(memcmp(&srv->sin6_addr, &in6addr_any,
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sizeof (struct in6_addr)) &&
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memcmp(&srv->sin6_addr, &inp->sin6_addr,
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sizeof (struct in6_addr))))
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return (1);
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}
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}
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#else
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ina = *inp;
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for (ns = 0; ns < statp->nscount; ns++) {
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const struct sockaddr_in *srv = &statp->nsaddr_list[ns];
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@ -239,6 +278,7 @@ res_ourserver_p(const res_state statp, const struct sockaddr_in *inp) {
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srv->sin_addr.s_addr == ina.sin_addr.s_addr))
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return (1);
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}
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#endif
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return (0);
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}
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@ -360,11 +400,15 @@ res_nsend(res_state statp,
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needclose++;
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else
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for (ns = 0; ns < statp->nscount; ns++)
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if (!sock_eq(&statp->nsaddr_list[ns],
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#ifdef _LIBC
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(struct sockaddr_in *)
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if (!sock_eq((struct sockaddr_in6 *)
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&statp->nsaddr_list[ns],
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EXT(statp).nsaddrs[ns]))
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#else
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if (!sock_eq(&statp->nsaddr_list[ns],
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&EXT(statp).nsaddrs[ns]))
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#endif
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&EXT(statp).nsaddrs[ns])) {
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{
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needclose++;
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break;
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}
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@ -376,18 +420,52 @@ res_nsend(res_state statp,
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* Maybe initialize our private copy of the ns_addr_list.
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*/
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if (EXT(statp).nscount == 0) {
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#ifdef _LIBC
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n = 0;
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#endif
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for (ns = 0; ns < statp->nscount; ns++) {
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#ifdef _LIBC
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memcpy(&EXT(statp).nsaddrs[ns],
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&statp->nsaddr_list[ns],
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sizeof (&EXT(statp).nsaddrs[0]));
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/* find a hole */
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while ((n < MAXNS) &&
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(EXT(statp).nsaddrs[n] != NULL) &&
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(EXT(statp).nsaddrs[n]->sin6_family == AF_INET6) &&
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!IN6_IS_ADDR_V4MAPPED(
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&EXT(statp).nsaddrs[n]->sin6_addr))
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n++;
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if (n == MAXNS)
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break;
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if (EXT(statp).nsaddrs[n] == NULL)
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EXT(statp).nsaddrs[n] =
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malloc(sizeof (struct sockaddr_in6));
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if (EXT(statp).nsaddrs[n] != NULL) {
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memcpy(EXT(statp).nsaddrs[n],
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&statp->nsaddr_list[ns],
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sizeof (struct sockaddr_in));
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EXT(statp).nstimes[n] = RES_MAXTIME;
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EXT(statp).nssocks[n] = -1;
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n++;
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}
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#else
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EXT(statp).nsaddrs[ns] = statp->nsaddr_list[ns];
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#endif
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EXT(statp).nstimes[ns] = RES_MAXTIME;
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EXT(statp).nssocks[ns] = -1;
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#endif
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}
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EXT(statp).nscount = statp->nscount;
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#ifdef _LIBC
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/* If holes left, free memory and set to NULL */
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while (n < MAXNS) {
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if ((EXT(statp).nsaddrs[n] != NULL) &&
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((EXT(statp).nsaddrs[n]->sin6_family != AF_INET6)
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|| IN6_IS_ADDR_V4MAPPED(
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&EXT(statp).nsaddrs[n]->sin6_addr))) {
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free(EXT(statp).nsaddrs[n]);
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EXT(statp).nsaddrs[n] = NULL;
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}
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n++;
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}
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#endif
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}
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/*
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@ -396,6 +474,15 @@ res_nsend(res_state statp,
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*/
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if ((statp->options & RES_ROTATE) != 0 &&
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(statp->options & RES_BLAST) == 0) {
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#ifdef _LIBC
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struct sockaddr_in6 *ina;
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int lastns = statp->nscount + EXT(statp).nscount6 - 1;
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ina = EXT(statp).nsaddrs[0];
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for (ns = 0; ns < lastns; ns++)
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EXT(statp).nsaddrs[ns] = EXT(statp).nsaddrs[ns + 1];
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EXT(statp).nsaddrs[lastns] = ina;
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#else
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struct sockaddr_in ina;
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int lastns = statp->nscount - 1;
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@ -403,14 +490,27 @@ res_nsend(res_state statp,
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for (ns = 0; ns < lastns; ns++)
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statp->nsaddr_list[ns] = statp->nsaddr_list[ns + 1];
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statp->nsaddr_list[lastns] = ina;
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#endif
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}
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/*
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* Send request, RETRY times, or until successful.
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*/
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for (try = 0; try < statp->retry; try++) {
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for (ns = 0; ns < statp->nscount; ns++) {
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#ifdef _LIBC
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for (ns = 0; ns < MAXNS; ns++)
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#else
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for (ns = 0; ns < statp->nscount; ns++)
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#endif
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{
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#ifdef _LIBC
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struct sockaddr_in6 *nsap = EXT(statp).nsaddrs[ns];
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if (nsap == NULL)
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goto next_ns;
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#else
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struct sockaddr_in *nsap = &statp->nsaddr_list[ns];
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#endif
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same_ns:
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if (statp->qhook) {
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int done = 0, loops = 0;
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@ -418,8 +518,14 @@ res_nsend(res_state statp,
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do {
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res_sendhookact act;
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#ifdef _LIBC
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act = (*statp->qhook)((struct sockaddr_in **)
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&nsap, &buf, &buflen,
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ans, anssiz, &resplen);
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#else
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act = (*statp->qhook)(&nsap, &buf, &buflen,
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ans, anssiz, &resplen);
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#endif
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switch (act) {
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case res_goahead:
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done = 1;
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@ -494,8 +600,14 @@ res_nsend(res_state statp,
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do {
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res_sendhookact act;
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#ifdef _LIBC
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act = (*statp->rhook)((struct sockaddr_in *)
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nsap, buf, buflen,
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ans, anssiz, &resplen);
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#else
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act = (*statp->rhook)(nsap, buf, buflen,
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ans, anssiz, &resplen);
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#endif
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switch (act) {
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case res_goahead:
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case res_done:
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@ -541,7 +653,11 @@ send_vc(res_state statp,
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{
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const HEADER *hp = (HEADER *) buf;
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HEADER *anhp = (HEADER *) ans;
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#ifdef _LIBC
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struct sockaddr_in6 *nsap = EXT(statp).nsaddrs[ns];
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#else
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struct sockaddr_in *nsap = &statp->nsaddr_list[ns];
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#endif
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int truncating, connreset, resplen, n;
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struct iovec iov[2];
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u_short len;
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@ -553,7 +669,11 @@ send_vc(res_state statp,
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|
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/* Are we still talking to whom we want to talk to? */
|
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if (statp->_vcsock >= 0 && (statp->_flags & RES_F_VC) != 0) {
|
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#ifdef _LIBC
|
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struct sockaddr_in6 peer;
|
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#else
|
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struct sockaddr_in peer;
|
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#endif
|
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int size = sizeof peer;
|
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|
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if (getpeername(statp->_vcsock,
|
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@ -568,8 +688,10 @@ send_vc(res_state statp,
|
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if (statp->_vcsock >= 0)
|
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res_nclose(statp);
|
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|
||||
#ifdef _LIBC
|
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statp->_vcsock = socket(nsap->sin6_family, SOCK_STREAM, 0);
|
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#else
|
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statp->_vcsock = socket(PF_INET, SOCK_STREAM, 0);
|
||||
#ifndef _LIBC
|
||||
if (statp->_vcsock > highestFD) {
|
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res_nclose(statp);
|
||||
__set_errno (ENOTSOCK);
|
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@ -711,20 +833,36 @@ send_dg(res_state statp,
|
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{
|
||||
const HEADER *hp = (HEADER *) buf;
|
||||
HEADER *anhp = (HEADER *) ans;
|
||||
#ifdef _LIBC
|
||||
struct sockaddr_in6 *nsap = EXT(statp).nsaddrs[ns];
|
||||
#else
|
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const struct sockaddr_in *nsap = &statp->nsaddr_list[ns];
|
||||
#endif
|
||||
struct timespec now, timeout, finish;
|
||||
#ifdef _LIBC
|
||||
struct pollfd pfd[1];
|
||||
int ptimeout;
|
||||
struct sockaddr_in6 from;
|
||||
static int socket_pf = 0;
|
||||
#else
|
||||
fd_set dsmask;
|
||||
#endif
|
||||
struct sockaddr_in from;
|
||||
#endif
|
||||
int fromlen, resplen, seconds, n, s;
|
||||
|
||||
if (EXT(statp).nssocks[ns] == -1) {
|
||||
#ifdef _LIBC
|
||||
/* only try IPv6 if IPv6 NS and if not failed before */
|
||||
if ((EXT(statp).nscount6 > 0) && (socket_pf != PF_INET)) {
|
||||
EXT(statp).nssocks[ns] =
|
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socket(PF_INET6, SOCK_DGRAM, 0);
|
||||
socket_pf = EXT(statp).nssocks[ns] < 0 ? PF_INET
|
||||
: PF_INET6;
|
||||
}
|
||||
if (EXT(statp).nssocks[ns] < 0)
|
||||
EXT(statp).nssocks[ns] = socket(PF_INET, SOCK_DGRAM, 0);
|
||||
#else
|
||||
EXT(statp).nssocks[ns] = socket(PF_INET, SOCK_DGRAM, 0);
|
||||
#ifndef _LIBC
|
||||
if (EXT(statp).nssocks[ns] > highestFD) {
|
||||
res_nclose(statp);
|
||||
__set_errno (ENOTSOCK);
|
||||
@ -736,6 +874,11 @@ send_dg(res_state statp,
|
||||
return (-1);
|
||||
}
|
||||
#ifndef CANNOT_CONNECT_DGRAM
|
||||
#ifdef _LIBC
|
||||
/* If IPv6 socket and nsap is IPv4, make it IPv4-mapped */
|
||||
if ((socket_pf == PF_INET6) && (nsap->sin6_family == AF_INET))
|
||||
convaddr4to6(nsap);
|
||||
#endif
|
||||
/*
|
||||
* On a 4.3BSD+ machine (client and server,
|
||||
* actually), sending to a nameserver datagram
|
||||
@ -765,6 +908,11 @@ send_dg(res_state statp,
|
||||
return (0);
|
||||
}
|
||||
#else /* !CANNOT_CONNECT_DGRAM */
|
||||
#ifdef _LIBC
|
||||
/* If IPv6 socket and nsap is IPv4, make it IPv4-mapped */
|
||||
if ((socket_pf == PF_INET6) && (nsap->sin6_family == AF_INET))
|
||||
convaddr4to6(nsap);
|
||||
#endif
|
||||
if (sendto(s, (char*)buf, buflen, 0,
|
||||
(struct sockaddr *)nsap, sizeof *nsap) != buflen)
|
||||
{
|
||||
@ -816,7 +964,11 @@ send_dg(res_state statp,
|
||||
return (0);
|
||||
}
|
||||
__set_errno (0);
|
||||
#ifdef _LIBC
|
||||
fromlen = sizeof(struct sockaddr_in6);
|
||||
#else
|
||||
fromlen = sizeof(struct sockaddr_in);
|
||||
#endif
|
||||
resplen = recvfrom(s, (char*)ans, anssiz,0,
|
||||
(struct sockaddr *)&from, &fromlen);
|
||||
if (resplen <= 0) {
|
||||
@ -936,11 +1088,55 @@ Perror(const res_state statp, FILE *file, const char *string, int error) {
|
||||
#endif
|
||||
|
||||
static int
|
||||
#ifdef _LIBC
|
||||
sock_eq(struct sockaddr_in6 *a1, struct sockaddr_in6 *a2) {
|
||||
if (a1->sin6_family == a2->sin6_family) {
|
||||
if (a1->sin6_family == AF_INET)
|
||||
return ((((struct sockaddr_in *)a1)->sin_port ==
|
||||
((struct sockaddr_in *)a2)->sin_port) &&
|
||||
(((struct sockaddr_in *)a1)->sin_addr.s_addr ==
|
||||
((struct sockaddr_in *)a2)->sin_addr.s_addr));
|
||||
else
|
||||
return ((a1->sin6_port == a2->sin6_port) &&
|
||||
!memcmp(&a1->sin6_addr, &a2->sin6_addr,
|
||||
sizeof (struct in6_addr)));
|
||||
}
|
||||
if (a1->sin6_family == AF_INET) {
|
||||
struct sockaddr_in6 *sap = a1;
|
||||
a1 = a2;
|
||||
a2 = sap;
|
||||
} /* assumes that AF_INET and AF_INET6 are the only possibilities */
|
||||
return ((a1->sin6_port == ((struct sockaddr_in *)a2)->sin_port) &&
|
||||
IN6_IS_ADDR_V4MAPPED(&a1->sin6_addr) &&
|
||||
(a1->sin6_addr.s6_addr32[3] ==
|
||||
((struct sockaddr_in *)a2)->sin_addr.s_addr));
|
||||
}
|
||||
#else
|
||||
sock_eq(struct sockaddr_in *a1, struct sockaddr_in *a2) {
|
||||
return ((a1->sin_family == a2->sin_family) &&
|
||||
(a1->sin_port == a2->sin_port) &&
|
||||
(a1->sin_addr.s_addr == a2->sin_addr.s_addr));
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef _LIBC
|
||||
/*
|
||||
* Converts IPv4 family, address and port to
|
||||
* IPv6 family, IPv4-mapped IPv6 address and port.
|
||||
*/
|
||||
static void
|
||||
convaddr4to6(struct sockaddr_in6 *sa)
|
||||
{
|
||||
const struct sockaddr_in sa4 = *(struct sockaddr_in *)sa;
|
||||
|
||||
sa->sin6_family = AF_INET6;
|
||||
sa->sin6_port = sa4.sin_port;
|
||||
sa->sin6_addr.s6_addr32[0] = 0;
|
||||
sa->sin6_addr.s6_addr32[1] = 0;
|
||||
sa->sin6_addr.s6_addr32[2] = htonl(0xFFFF);
|
||||
sa->sin6_addr.s6_addr32[3] = sa4.sin_addr.s_addr;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef NEED_PSELECT
|
||||
/* XXX needs to move to the porting library. */
|
||||
|
||||
@ -163,7 +163,12 @@ struct __res_state {
|
||||
u_int16_t nscount;
|
||||
u_int16_t nstimes[MAXNS]; /* ms. */
|
||||
int nssocks[MAXNS];
|
||||
#ifdef _LIBC
|
||||
u_int16_t nscount6;
|
||||
struct sockaddr_in6 *nsaddrs[MAXNS];
|
||||
#else
|
||||
struct __sockaddr_in nsaddrs[MAXNS];
|
||||
#endif
|
||||
} _ext;
|
||||
} _u;
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user