--- /dev/null
+/* ====================================================================
+ * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <string.h>
+
+#include "bio_lcl.h"
+
+#include <openssl/err.h>
+#include <openssl/buffer.h>
+
+/*
+ * Throughout this file and bio_lcl.h, the existence of the macro
+ * AI_PASSIVE is used to detect the availability of struct addrinfo,
+ * getnameinfo() and getaddrinfo(). If that macro doesn't exist,
+ * we use our own implementation instead, using gethostbyname,
+ * getservbyname and a few other.
+ */
+
+/**********************************************************************
+ *
+ * Address structure
+ *
+ */
+
+BIO_ADDR *BIO_ADDR_new(void)
+{
+ BIO_ADDR *ret = (BIO_ADDR *)OPENSSL_zalloc(sizeof(BIO_ADDR));
+ return ret;
+}
+
+void BIO_ADDR_free(BIO_ADDR *ap)
+{
+ OPENSSL_free(ap);
+}
+
+/*
+ * BIO_ADDR_make - non-public routine to fill a BIO_ADDR with the contents
+ * of a struct sockaddr.
+ */
+int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa)
+{
+ if (sa->sa_family == AF_INET) {
+ ap->sin = *(const struct sockaddr_in *)sa;
+ return 1;
+ }
+#ifdef AF_INET6
+ if (sa->sa_family == AF_INET6) {
+ ap->sin6 = *(const struct sockaddr_in6 *)sa;
+ return 1;
+ }
+#endif
+#ifdef AF_UNIX
+ if (ap->sa.sa_family == AF_UNIX) {
+ ap->sun = *(const struct sockaddr_un *)sa;
+ return 1;
+ }
+#endif
+
+ return 0;
+}
+
+int BIO_ADDR_rawmake(BIO_ADDR *ap, int family,
+ const void *where, size_t wherelen,
+ unsigned short port)
+{
+#ifdef AF_UNIX
+ if (family == AF_UNIX) {
+ if (wherelen + 1 > sizeof(ap->sun.sun_path))
+ return 0;
+ memset(&ap->sun, 0, sizeof(ap->sun));
+ ap->sun.sun_family = family;
+ strncpy(ap->sun.sun_path, where, sizeof(ap->sun.sun_path) - 1);
+ return 1;
+ }
+#endif
+ if (family == AF_INET) {
+ if (wherelen != sizeof(struct in_addr))
+ return 0;
+ memset(&ap->sin, 0, sizeof(ap->sin));
+ ap->sin.sin_family = family;
+ ap->sin.sin_port = port;
+ ap->sin.sin_addr = *(struct in_addr *)where;
+ return 1;
+ }
+#ifdef AF_INET6
+ if (family == AF_INET6) {
+ if (wherelen != sizeof(struct in6_addr))
+ return 0;
+ memset(&ap->sin6, 0, sizeof(ap->sin6));
+ ap->sin6.sin6_family = family;
+ ap->sin6.sin6_port = port;
+ ap->sin6.sin6_addr = *(struct in6_addr *)where;
+ return 1;
+ }
+#endif
+
+ return 0;
+}
+
+int BIO_ADDR_family(const BIO_ADDR *ap)
+{
+ return ap->sa.sa_family;
+}
+
+int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l)
+{
+ size_t len = 0;
+ const void *addrptr = NULL;
+
+ if (ap->sa.sa_family == AF_INET) {
+ len = sizeof(ap->sin.sin_addr);
+ addrptr = &ap->sin.sin_addr;
+ }
+#ifdef AF_INET6
+ else if (ap->sa.sa_family == AF_INET6) {
+ len = sizeof(ap->sin6.sin6_addr);
+ addrptr = &ap->sin6.sin6_addr;
+ }
+#endif
+#ifdef AF_UNIX
+ else if (ap->sa.sa_family == AF_UNIX) {
+ len = strlen(ap->sun.sun_path);
+ addrptr = &ap->sun.sun_path;
+ }
+#endif
+
+ if (addrptr == NULL)
+ return 0;
+
+ if (p != NULL) {
+ memcpy(p, addrptr, len);
+ }
+ if (l != NULL)
+ *l = len;
+
+ return 1;
+}
+
+unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap)
+{
+ if (ap->sa.sa_family == AF_INET)
+ return ap->sin.sin_port;
+#ifdef AF_INET6
+ if (ap->sa.sa_family == AF_INET6)
+ return ap->sin6.sin6_port;
+#endif
+ return 0;
+}
+
+/*-
+ * addr_strings - helper function to get host and service names
+ * @ap: the BIO_ADDR that has the input info
+ * @numeric: 0 if actual names should be returned, 1 if the numeric
+ * representation should be returned.
+ * @hostname: a pointer to a pointer to a memory area to store the
+ * host name or numeric representation. Unused if NULL.
+ * @service: a pointer to a pointer to a memory area to store the
+ * service name or numeric representation. Unused if NULL.
+ *
+ * The return value is 0 on failure, with the error code in the error
+ * stack, and 1 on success.
+ */
+static int addr_strings(const BIO_ADDR *ap, int numeric,
+ char **hostname, char **service)
+{
+ if (1) {
+#ifdef AI_PASSIVE
+ int ret = 0;
+ char host[NI_MAXHOST], serv[NI_MAXSERV];
+ int flags = 0;
+
+ if (numeric)
+ flags |= NI_NUMERICHOST | NI_NUMERICSERV;
+
+ if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap),
+ BIO_ADDR_sockaddr_size(ap),
+ host, sizeof(host), serv, sizeof(serv),
+ flags)) != 0) {
+# ifdef EAI_SYSTEM
+ if (ret == EAI_SYSTEM) {
+ SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error());
+ BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB);
+ } else
+# endif
+ {
+ BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB);
+ ERR_add_error_data(1, gai_strerror(ret));
+ }
+ return 0;
+ }
+ if (hostname)
+ *hostname = OPENSSL_strdup(host);
+ if (service)
+ *service = OPENSSL_strdup(serv);
+ } else {
+#endif
+ if (hostname)
+ *hostname = OPENSSL_strdup(inet_ntoa(ap->sin.sin_addr));
+ if (service) {
+ char serv[6]; /* port is 16 bits => max 5 decimal digits */
+ BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->sin.sin_port));
+ *service = OPENSSL_strdup(serv);
+ }
+ }
+
+ return 1;
+}
+
+char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric)
+{
+ char *hostname = NULL;
+
+ if (addr_strings(ap, numeric, &hostname, NULL))
+ return hostname;
+
+ return NULL;
+}
+
+char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric)
+{
+ char *service = NULL;
+
+ if (addr_strings(ap, numeric, NULL, &service))
+ return service;
+
+ return NULL;
+}
+
+char *BIO_ADDR_path_string(const BIO_ADDR *ap)
+{
+#ifdef AF_UNIX
+ if (ap->sa.sa_family == AF_UNIX)
+ return OPENSSL_strdup(ap->sun.sun_path);
+#endif
+ return NULL;
+}
+
+/*
+ * BIO_ADDR_sockaddr - non-public routine to return the struct sockaddr
+ * for a given BIO_ADDR. In reality, this is simply a type safe cast.
+ * The returned struct sockaddr is const, so it can't be tampered with.
+ */
+const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap)
+{
+ return &(ap->sa);
+}
+
+/*
+ * BIO_ADDR_sockaddr_noconst - non-public function that does the same
+ * as BIO_ADDR_sockaddr, but returns a non-const. USE WITH CARE, as
+ * it allows you to tamper with the data (and thereby the contents
+ * of the input BIO_ADDR).
+ */
+struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap)
+{
+ return &(ap->sa);
+}
+
+/*
+ * BIO_ADDR_sockaddr_size - non-public function that returns the size
+ * of the struct sockaddr the BIO_ADDR is using. If the protocol family
+ * isn't set or is something other than AF_INET, AF_INET6 or AF_UNIX,
+ * the size of the BIO_ADDR type is returned.
+ */
+socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap)
+{
+ if (ap->sa.sa_family == AF_INET)
+ return sizeof(ap->sin);
+#ifdef AF_INET6
+ if (ap->sa.sa_family == AF_INET6)
+ return sizeof(ap->sin6);
+#endif
+#ifdef AF_UNIX
+ if (ap->sa.sa_family == AF_UNIX)
+ return sizeof(ap->sun);
+#endif
+ return sizeof(*ap);
+}
+
+/**********************************************************************
+ *
+ * Address into database
+ *
+ */
+
+const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai)
+{
+ if (bai != NULL)
+ return bai->bai_next;
+ return NULL;
+}
+
+int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai)
+{
+ if (bai != NULL)
+ return bai->bai_family;
+ return 0;
+}
+
+int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai)
+{
+ if (bai != NULL)
+ return bai->bai_socktype;
+ return 0;
+}
+
+int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai)
+{
+ if (bai != NULL)
+ return bai->bai_protocol;
+ return 0;
+}
+
+/*
+ * BIO_ADDRINFO_sockaddr_size - non-public function that returns the size
+ * of the struct sockaddr inside the BIO_ADDRINFO.
+ */
+socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai)
+{
+ if (bai != NULL)
+ return bai->bai_addrlen;
+ return 0;
+}
+
+/*
+ * BIO_ADDRINFO_sockaddr - non-public function that returns bai_addr
+ * as the struct sockaddr it is.
+ */
+const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai)
+{
+ if (bai != NULL)
+ return bai->bai_addr;
+ return NULL;
+}
+
+const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai)
+{
+ if (bai != NULL)
+ return (BIO_ADDR *)bai->bai_addr;
+ return NULL;
+}
+
+void BIO_ADDRINFO_free(BIO_ADDRINFO *bai)
+{
+ if (bai == NULL)
+ return;
+
+#ifdef AI_PASSIVE
+# ifdef AF_UNIX
+# define _cond bai->bai_family != AF_UNIX
+# else
+# define _cond 1
+# endif
+ if (_cond) {
+ freeaddrinfo(bai);
+ return;
+ }
+#endif
+
+ /* Free manually when we know that addrinfo_wrap() was used.
+ * See further comment above addrinfo_wrap()
+ */
+ while (bai != NULL) {
+ BIO_ADDRINFO *next = bai->bai_next;
+ OPENSSL_free(bai->bai_addr);
+ OPENSSL_free(bai);
+ bai = next;
+ }
+}
+
+/**********************************************************************
+ *
+ * Service functions
+ *
+ */
+
+/*-
+ * The specs in hostserv can take these forms:
+ *
+ * host:service => *host = "host", *service = "service"
+ * host:* => *host = "host", *service = NULL
+ * host: => *host = "host", *service = NULL
+ * :service => *host = NULL, *service = "service"
+ * *:service => *host = NULL, *service = "service"
+ *
+ * in case no : is present in the string, the result depends on
+ * hostserv_prio, as follows:
+ *
+ * when hostserv_prio == BIO_PARSE_PRIO_HOST
+ * host => *host = "host", *service untouched
+ *
+ * when hostserv_prio == BIO_PARSE_PRIO_SERV
+ * service => *host untouched, *service = "service"
+ *
+ */
+int BIO_parse_hostserv(const char *hostserv, char **host, char **service,
+ enum BIO_hostserv_priorities hostserv_prio)
+{
+ const char *h = NULL; size_t hl = 0;
+ const char *p = NULL; size_t pl = 0;
+
+ if (*hostserv == '[') {
+ if ((p = strchr(hostserv, ']')) == NULL)
+ goto spec_err;
+ h = hostserv + 1;
+ hl = p - h;
+ p++;
+ if (*p == '\0')
+ p = NULL;
+ else if (*p != ':')
+ goto spec_err;
+ else {
+ p++;
+ pl = strlen(p);
+ }
+ } else {
+ const char *p2 = strrchr(hostserv, ':');
+ p = strchr(hostserv, ':');
+
+ /*-
+ * Check for more than one colon. There are three possible
+ * interpretations:
+ * 1. IPv6 address with port number, last colon being separator.
+ * 2. IPv6 address only.
+ * 3. IPv6 address only if hostserv_prio == BIO_PARSE_PRIO_HOST,
+ * IPv6 address and port number if hostserv_prio == BIO_PARSE_PRIO_SERV
+ * Because of this ambiguity, we currently choose to make it an
+ * error.
+ */
+ if (p != p2)
+ goto amb_err;
+
+ if (p != NULL) {
+ h = hostserv;
+ hl = p - h;
+ p++;
+ pl = strlen(p);
+ } else if (hostserv_prio == BIO_PARSE_PRIO_HOST) {
+ h = hostserv;
+ hl = strlen(h);
+ } else {
+ p = hostserv;
+ pl = strlen(p);
+ }
+ }
+
+ if (strchr(p, ':'))
+ goto spec_err;
+
+ if (h != NULL && host != NULL) {
+ if (hl == 0
+ || (hl == 1 && h[0] == '*')) {
+ *host = NULL;
+ } else {
+ *host = OPENSSL_strndup(h, hl);
+ if (*host == NULL)
+ goto memerr;
+ }
+ }
+ if (p != NULL && service != NULL) {
+ if (pl == 0
+ || (pl == 1 && p[0] == '*')) {
+ *service = NULL;
+ } else {
+ *service = OPENSSL_strndup(p, pl);
+ if (*service == NULL)
+ goto memerr;
+ }
+ }
+
+ return 1;
+ amb_err:
+ BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_AMBIGUOUS_HOST_OR_SERVICE);
+ return 0;
+ spec_err:
+ BIOerr(BIO_F_BIO_PARSE_HOSTSERV, BIO_R_MALFORMED_HOST_OR_SERVICE);
+ return 0;
+ memerr:
+ BIOerr(BIO_F_BIO_PARSE_HOSTSERV, ERR_R_MALLOC_FAILURE);
+ return 0;
+}
+
+/* addrinfo_wrap is used to build our own addrinfo "chain".
+ * (it has only one entry, so calling it a chain may be a stretch)
+ * It should ONLY be called when getaddrinfo() and friends
+ * aren't available, OR when dealing with a non IP protocol
+ * family, such as AF_UNIX
+ *
+ * the return value is 1 on success, or 0 on failure, which
+ * only happens if a memory allocation error occured.
+ */
+static int addrinfo_wrap(int family, int socktype,
+ const void *where, size_t wherelen,
+ unsigned short port,
+ BIO_ADDRINFO **bai)
+{
+ OPENSSL_assert(bai != NULL);
+
+ *bai = (BIO_ADDRINFO *)OPENSSL_zalloc(sizeof(**bai));
+
+ if (*bai == NULL)
+ return 0;
+ (*bai)->bai_family = family;
+ (*bai)->bai_socktype = socktype;
+ if (socktype == SOCK_STREAM)
+ (*bai)->bai_protocol = IPPROTO_TCP;
+ if (socktype == SOCK_DGRAM)
+ (*bai)->bai_protocol = IPPROTO_UDP;
+#ifdef AF_UNIX
+ if (family == AF_UNIX)
+ (*bai)->bai_protocol = 0;
+#endif
+ {
+ /* Magic: We know that BIO_ADDR_sockaddr_noconst is really
+ just an advanced cast of BIO_ADDR* to struct sockaddr *
+ by the power of union, so while it may seem that we're
+ creating a memory leak here, we are not. It will be
+ all right. */
+ BIO_ADDR *addr = BIO_ADDR_new();
+ if (addr != NULL) {
+ BIO_ADDR_rawmake(addr, family, where, wherelen, port);
+ (*bai)->bai_addr = BIO_ADDR_sockaddr_noconst(addr);
+ }
+ }
+ (*bai)->bai_next = NULL;
+ if ((*bai)->bai_addr == NULL) {
+ BIO_ADDRINFO_free(*bai);
+ *bai = NULL;
+ return 0;
+ }
+ return 1;
+}
+
+/*-
+ * BIO_lookup - look up the node and service you want to connect to.
+ * @node: the node you want to connect to.
+ * @service: the service you want to connect to.
+ * @lookup_type: declare intent with the result, client or server.
+ * @family: the address family you want to use. Use AF_UNSPEC for any, or
+ * AF_INET, AF_INET6 or AF_UNIX.
+ * @socktype: The socket type you want to use. Can be SOCK_STREAM, SOCK_DGRAM
+ * or 0 for all.
+ * @res: Storage place for the resulting list of returned addresses
+ *
+ * This will do a lookup of the node and service that you want to connect to.
+ * It returns a linked list of different addresses you can try to connect to.
+ *
+ * When no longer needed you should call BIO_ADDRINFO_free() to free the result.
+ *
+ * The return value is 1 on success or 0 in case of error.
+ */
+int BIO_lookup(const char *host, const char *service,
+ enum BIO_lookup_type lookup_type,
+ int family, int socktype, BIO_ADDRINFO **res)
+{
+ int ret = 0; /* Assume failure */
+
+ switch(family) {
+ case AF_INET:
+#ifdef AF_INET6
+ case AF_INET6:
+#endif
+#ifdef AF_UNIX
+ case AF_UNIX:
+#endif
+#ifdef AF_UNSPEC
+ case AF_UNSPEC:
+#endif
+ break;
+ default:
+ BIOerr(BIO_F_BIO_LOOKUP, BIO_R_UNSUPPORTED_PROTOCOL_FAMILY);
+ return 0;
+ }
+
+#ifdef AF_UNIX
+ if (family == AF_UNIX) {
+ if (addrinfo_wrap(family, socktype, host, strlen(host), 0, res))
+ return 1;
+ else
+ BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+#endif
+
+ if (1) {
+#ifdef AI_PASSIVE
+ struct addrinfo hints;
+
+ hints.ai_flags = 0;
+# ifdef AI_ADDRCONFIG
+ hints.ai_flags = AI_ADDRCONFIG;
+# endif
+ hints.ai_family = family;
+ hints.ai_socktype = socktype;
+ hints.ai_protocol = 0;
+ hints.ai_addrlen = 0;
+ hints.ai_addr = NULL;
+ hints.ai_canonname = NULL;
+ hints.ai_next = NULL;
+
+ if (lookup_type == BIO_LOOKUP_SERVER)
+ hints.ai_flags |= AI_PASSIVE;
+
+ /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to
+ * macro magic in bio_lcl.h
+ */
+ switch (getaddrinfo(host, service, &hints, res)) {
+# ifdef EAI_SYSTEM
+ case EAI_SYSTEM:
+ SYSerr(SYS_F_GETADDRINFO, get_last_socket_error());
+ BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
+ break;
+# endif
+ case 0:
+ ret = 1; /* Success */
+ break;
+ default:
+ BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
+ ERR_add_error_data(1, gai_strerror(ret));
+ break;
+ }
+ } else {
+#endif
+ struct hostent *he;
+ /* Windows doesn't seem to have in_addr_t */
+#ifdef OPENSSL_SYS_WINDOWS
+ uint32_t he_fallback_address = INADDR_ANY;
+ uint32_t *he_fallback_addresses[] = { &he_fallback_address, NULL };
+#else
+ in_addr_t he_fallback_address = INADDR_ANY;
+ in_addr_t *he_fallback_addresses[] = { &he_fallback_address, NULL };
+#endif
+ struct hostent he_fallback = { NULL, NULL, AF_INET,
+ sizeof(he_fallback_address),
+ (char **)&he_fallback_addresses };
+ struct servent *se;
+ /* Apprently, on WIN64, s_proto and s_port have traded places... */
+#ifdef _WIN64
+ struct servent se_fallback = { NULL, NULL, NULL, 0 };
+#else
+ struct servent se_fallback = { NULL, NULL, 0, NULL };
+#endif
+ char *proto = NULL;
+
+ CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
+ CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
+ if (host == NULL) {
+ he = &he_fallback;
+ switch(lookup_type) {
+ case BIO_LOOKUP_CLIENT:
+ he_fallback_address = INADDR_LOOPBACK;
+ break;
+ case BIO_LOOKUP_SERVER:
+ he_fallback_address = INADDR_ANY;
+ break;
+ default:
+ OPENSSL_assert(("We forgot to handle a lookup type!" == 0));
+ break;
+ }
+ } else {
+ he = gethostbyname(host);
+
+ if (he == NULL) {
+ BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
+ ERR_add_error_data(1, hstrerror(h_errno));
+ ret = 0;
+ goto err;
+ }
+ }
+
+ if (service == NULL) {
+ se_fallback.s_port = 0;
+ se_fallback.s_proto = proto;
+ se = &se_fallback;
+ } else {
+ char *endp = NULL;
+ long portnum = strtol(service, &endp, 10);
+
+ if (endp != service && *endp == '\0'
+ && portnum > 0 && portnum < 65536) {
+ se_fallback.s_port = htons(portnum);
+ se_fallback.s_proto = proto;
+ se = &se_fallback;
+ } else if (endp == service) {
+ switch (socktype) {
+ case SOCK_STREAM:
+ proto = "tcp";
+ break;
+ case SOCK_DGRAM:
+ proto = "udp";
+ break;
+ }
+ se = getservbyname(service, proto);
+
+ if (se == NULL) {
+ BIOerr(BIO_F_BIO_LOOKUP, ERR_R_SYS_LIB);
+ ERR_add_error_data(1, hstrerror(h_errno));
+ goto err;
+ }
+ } else {
+ BIOerr(BIO_F_BIO_LOOKUP, BIO_R_MALFORMED_HOST_OR_SERVICE);
+ goto err;
+ }
+ }
+
+ *res = NULL;
+
+ {
+ char **addrlistp;
+ size_t addresses;
+ BIO_ADDRINFO *tmp_bai = NULL;
+
+ /* The easiest way to create a linked list from an
+ array is to start from the back */
+ for(addrlistp = he->h_addr_list; *addrlistp != NULL;
+ addrlistp++)
+ ;
+
+ for(addresses = addrlistp - he->h_addr_list;
+ addrlistp--, addresses-- > 0; ) {
+ if (!addrinfo_wrap(he->h_addrtype, socktype,
+ *addrlistp, he->h_length,
+ se->s_port, &tmp_bai))
+ goto addrinfo_malloc_err;
+ tmp_bai->bai_next = *res;
+ *res = tmp_bai;
+ continue;
+ addrinfo_malloc_err:
+ BIO_ADDRINFO_free(*res);
+ *res = NULL;
+ BIOerr(BIO_F_BIO_LOOKUP, ERR_R_MALLOC_FAILURE);
+ ret = 0;
+ goto err;
+ }
+
+ ret = 1;
+ }
+ err:
+ CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
+ CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
+ }
+
+ return ret;
+}
--- /dev/null
+=pod
+
+=head1 NAME
+
+BIO_ADDR, BIO_ADDR_new, BIO_ADDR_free, BIO_ADDR_rawmake,
+BIO_ADDR_family, BIO_ADDR_rawaddress, BIO_ADDR_rawport,
+BIO_ADDR_hostname_string, BIO_ADDR_service_string,
+BIO_ADDR_path_string - BIO_ADDR routines
+
+=head1 SYNOPSIS
+
+ #include <sys/types.h>
+ #include <openssl/bio.h>
+
+ typedef union bio_addr_st BIO_ADDR;
+
+ BIO_ADDR *BIO_ADDR_new(void);
+ void BIO_ADDR_free(BIO_ADDR *);
+ int BIO_ADDR_rawmake(BIO_ADDR *ap, int family,
+ const void *where, size_t wherelen, unsigned short port);
+ int BIO_ADDR_family(const BIO_ADDR *ap);
+ int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l);
+ unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap);
+ char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric);
+ char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric);
+ char *BIO_ADDR_path_string(const BIO_ADDR *ap);
+
+=head1 DESCRIPTION
+
+The B<BIO_ADDR> type is a wrapper around all types of socket
+addresses that OpenSSL deals with, currently transparently
+supporting AF_INET, AF_INET6 and AF_UNIX according to what's
+available on the platform at hand.
+
+BIO_ADDR_new() creates a new unfilled B<BIO_ADDR>, to be used
+with routines that will fill it with information, such as
+BIO_accept_ex().
+
+BIO_ADDR_free() frees a B<BIO_ADDR> created with BIO_ADDR_new().
+
+BIO_ADDR_rawmake() takes a protocol B<family>, an byte array of
+size B<wherelen> with an address in network byte order pointed at
+by B<where> and a port number in network byte order in B<port> (except
+for the B<AF_UNIX> protocol family, where B<port> is meaningless and
+therefore ignored) and populates the given B<BIO_ADDR> with them.
+In case this creates a B<AF_UNIX> B<BIO_ADDR>, B<wherelen> is expected
+to be the length of the path string (not including the terminating
+NUL, such as the result of a call to strlen()).
+I<Read on about the addresses in L</RAW ADDRESSES> below>.
+
+BIO_ADDR_family() returns the protocol family of the given
+B<BIO_ADDR>. The possible non-error results are one of the
+constants AF_INET, AF_INET6 and AF_UNIX.
+
+BIO_ADDR_rawaddress() will write the raw address of the given
+B<BIO_ADDR> in the area pointed at by B<p> if B<p> is non-NULL,
+and will set B<*l> to be the amount of bytes the raw address
+takes up if B<l> is non-NULL.
+A technique to only find out the size of the address is a call
+with B<p> set to B<NULL>. The raw address will be in network byte
+order, most significant byte first.
+In case this is a B<AF_UNIX> B<BIO_ADDR>, B<l> gets the length of the
+path string (not including the terminating NUL, such as the result of
+a call to strlen()).
+I<Read on about the addresses in L</RAW ADDRESSES> below>.
+
+BIO_ADDR_rawport() returns the raw port of the given B<BIO_ADDR>.
+The raw port will be in network byte order.
+
+BIO_ADDR_hostname_string() returns a character string with the
+hostname of the given B<BIO_ADDR>. If B<numeric> is 1, the string
+will contain the numerical form of the address. This only works for
+B<BIO_ADDR> of the protocol families AF_INET and AF_INET6. The
+returned string has been allocated on the heap and must be freed
+with OPENSSL_free().
+
+BIO_ADDR_service_string() returns a character string with the
+service name of the port of the given B<BIO_ADDR>. If B<numeric>
+is 1, the string will contain the port number. This only works
+for B<BIO_ADDR> of the protocol families AF_INET and AF_INET6. The
+returned string has been allocated on the heap and must be freed
+with OPENSSL_free().
+
+BIO_ADDR_path_string() returns a character string with the path
+of the given B<BIO_ADDR>. This only works for B<BIO_ADDR> of the
+protocol family AF_UNIX. The returned string has been allocated
+on the heap and must be freed with OPENSSL_free().
+
+=head1 RAW ADDRESSES
+
+Both BIO_ADDR_rawmake() and BIO_ADDR_rawaddress() take a pointer to a
+network byte order address of a specific site. Internally, those are
+treated as a pointer to B<struct in_addr> (for B<AF_INET>), B<struct
+in6_addr> (for B<AF_INET6>) or B<char *> (for B<AF_UNIX>), all
+depending on the protocol family the address is for.
+
+=head1 RETURN VALUES
+
+The string producing functions BIO_ADDR_hostname_string(),
+BIO_ADDR_service_string() and BIO_ADDR_path_string() will
+return B<NULL> on error and leave an error indication on the
+OpenSSL error stack.
+
+All other functions described here return 0 or B<NULL> when the
+information they should return isn't available.
+
+=head1 SEE ALSO
+
+L<BIO_connect(3)>, L<BIO_s_connect(3)>
projects / oweals / openssl.git / commitdiff