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openssl/crypto/bio/b_addr.c
Matt Caswell 5114d8227e Add a BIO_lookup_ex() function 
The existing BIO_lookup() wraps a call to getaddrinfo and provides an
abstracted capability to lookup addresses based on socket type and family.
However it provides no ability to lookup based on protocol. Normally,
when dealing with TCP/UDP this is not required. However getaddrinfo (at
least on linux) never returns SCTP addresses unless you specifically ask
for them in the protocol field. Therefore BIO_lookup_ex() is added which
provides the protocol field.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3286)
2017-04-25 11:13:39 +01:00

895 lines
25 KiB
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/*
* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include "bio_lcl.h"
#include <openssl/crypto.h>
#ifndef OPENSSL_NO_SOCK
#include <openssl/err.h>
#include <openssl/buffer.h>
#include <internal/thread_once.h>
#include <ctype.h>
CRYPTO_RWLOCK *bio_lookup_lock;
static CRYPTO_ONCE bio_lookup_init = CRYPTO_ONCE_STATIC_INIT;
/*
* 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 = OPENSSL_zalloc(sizeof(*ret));
if (ret == NULL) {
BIOerr(BIO_F_BIO_ADDR_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
}
ret->sa.sa_family = AF_UNSPEC;
return ret;
}
void BIO_ADDR_free(BIO_ADDR *ap)
{
OPENSSL_free(ap);
}
void BIO_ADDR_clear(BIO_ADDR *ap)
{
memset(ap, 0, sizeof(*ap));
ap->sa.sa_family = AF_UNSPEC;
}
/*
* 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->s_in = *(const struct sockaddr_in *)sa;
return 1;
}
#ifdef AF_INET6
if (sa->sa_family == AF_INET6) {
ap->s_in6 = *(const struct sockaddr_in6 *)sa;
return 1;
}
#endif
#ifdef AF_UNIX
if (ap->sa.sa_family == AF_UNIX) {
ap->s_un = *(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->s_un.sun_path))
return 0;
memset(&ap->s_un, 0, sizeof(ap->s_un));
ap->s_un.sun_family = family;
strncpy(ap->s_un.sun_path, where, sizeof(ap->s_un.sun_path) - 1);
return 1;
}
#endif
if (family == AF_INET) {
if (wherelen != sizeof(struct in_addr))
return 0;
memset(&ap->s_in, 0, sizeof(ap->s_in));
ap->s_in.sin_family = family;
ap->s_in.sin_port = port;
ap->s_in.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->s_in6, 0, sizeof(ap->s_in6));
ap->s_in6.sin6_family = family;
ap->s_in6.sin6_port = port;
ap->s_in6.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->s_in.sin_addr);
addrptr = &ap->s_in.sin_addr;
}
#ifdef AF_INET6
else if (ap->sa.sa_family == AF_INET6) {
len = sizeof(ap->s_in6.sin6_addr);
addrptr = &ap->s_in6.sin6_addr;
}
#endif
#ifdef AF_UNIX
else if (ap->sa.sa_family == AF_UNIX) {
len = strlen(ap->s_un.sun_path);
addrptr = &ap->s_un.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->s_in.sin_port;
#ifdef AF_INET6
if (ap->sa.sa_family == AF_INET6)
return ap->s_in6.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 (BIO_sock_init() != 1)
return 0;
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;
}
/* VMS getnameinfo() has a bug, it doesn't fill in serv, which
* leaves it with whatever garbage that happens to be there.
* However, we initialise serv with the empty string (serv[0]
* is therefore NUL), so it gets real easy to detect when things
* didn't go the way one might expect.
*/
if (serv[0] == '\0') {
BIO_snprintf(serv, sizeof(serv), "%d",
ntohs(BIO_ADDR_rawport(ap)));
}
if (hostname != NULL)
*hostname = OPENSSL_strdup(host);
if (service != NULL)
*service = OPENSSL_strdup(serv);
} else {
#endif
if (hostname != NULL)
*hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr));
if (service != NULL) {
char serv[6]; /* port is 16 bits => max 5 decimal digits */
BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port));
*service = OPENSSL_strdup(serv);
}
}
if ((hostname != NULL && *hostname == NULL)
|| (service != NULL && *service == NULL)) {
if (hostname != NULL) {
OPENSSL_free(*hostname);
*hostname = NULL;
}
if (service != NULL) {
OPENSSL_free(*service);
*service = NULL;
}
BIOerr(BIO_F_ADDR_STRINGS, ERR_R_MALLOC_FAILURE);
return 0;
}
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->s_un.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->s_in);
#ifdef AF_INET6
if (ap->sa.sa_family == AF_INET6)
return sizeof(ap->s_in6);
#endif
#ifdef AF_UNIX
if (ap->sa.sa_family == AF_UNIX)
return sizeof(ap->s_un);
#endif
return sizeof(*ap);
}
/**********************************************************************
*
* Address info 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) {
if (bai->bai_protocol != 0)
return bai->bai_protocol;
#ifdef AF_UNIX
if (bai->bai_family == AF_UNIX)
return 0;
#endif
switch (bai->bai_socktype) {
case SOCK_STREAM:
return IPPROTO_TCP;
case SOCK_DGRAM:
return IPPROTO_UDP;
default:
break;
}
}
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 (p != NULL && 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 occurred.
*/
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 = 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;
}
DEFINE_RUN_ONCE_STATIC(do_bio_lookup_init)
{
OPENSSL_init_crypto(0, NULL);
bio_lookup_lock = CRYPTO_THREAD_lock_new();
return bio_lookup_lock != NULL;
}
int BIO_lookup(const char *host, const char *service,
enum BIO_lookup_type lookup_type,
int family, int socktype, BIO_ADDRINFO **res)
{
return BIO_lookup_ex(host, service, lookup_type, family, socktype, 0, res);
}
/*-
* 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.
* @protocol: The protocol to use, e.g. IPPROTO_TCP or IPPROTO_UDP or 0 for all.
* Note that some platforms may not return IPPROTO_SCTP without
* explicitly requesting it (i.e. IPPROTO_SCTP may not be returned
* with 0 for the protocol)
* @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_ex(const char *host, const char *service,
enum BIO_lookup_type lookup_type,
int family, int socktype, int protocol, 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_EX, 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_EX, ERR_R_MALLOC_FAILURE);
return 0;
}
#endif
if (BIO_sock_init() != 1)
return 0;
if (1) {
#ifdef AI_PASSIVE
int gai_ret = 0;
struct addrinfo hints;
memset(&hints, 0, sizeof hints);
hints.ai_family = family;
hints.ai_socktype = socktype;
hints.ai_protocol = protocol;
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 ((gai_ret = getaddrinfo(host, service, &hints, res))) {
# ifdef EAI_SYSTEM
case EAI_SYSTEM:
SYSerr(SYS_F_GETADDRINFO, get_last_socket_error());
BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_SYS_LIB);
break;
# endif
case 0:
ret = 1; /* Success */
break;
default:
BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_SYS_LIB);
ERR_add_error_data(1, gai_strerror(gai_ret));
break;
}
} else {
#endif
const struct hostent *he;
/*
* Because struct hostent is defined for 32-bit pointers only with
* VMS C, we need to make sure that '&he_fallback_address' and
* '&he_fallback_addresses' are 32-bit pointers
*/
#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
# pragma pointer_size save
# pragma pointer_size 32
#endif
/* Windows doesn't seem to have in_addr_t */
#ifdef OPENSSL_SYS_WINDOWS
static uint32_t he_fallback_address;
static const char *he_fallback_addresses[] =
{ (char *)&he_fallback_address, NULL };
#else
static in_addr_t he_fallback_address;
static const char *he_fallback_addresses[] =
{ (char *)&he_fallback_address, NULL };
#endif
static const struct hostent he_fallback =
{ NULL, NULL, AF_INET, sizeof(he_fallback_address),
(char **)&he_fallback_addresses };
#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
# pragma pointer_size restore
#endif
struct servent *se;
/* Apparently, 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
if (!RUN_ONCE(&bio_lookup_init, do_bio_lookup_init)) {
BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_MALLOC_FAILURE);
ret = 0;
goto err;
}
CRYPTO_THREAD_write_lock(bio_lookup_lock);
he_fallback_address = INADDR_ANY;
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) {
#ifndef OPENSSL_SYS_WINDOWS
/*
* This might be misleading, because h_errno is used as if
* it was errno. To minimize mixup add 1000. Underlying
* reason for this is that hstrerror is declared obsolete,
* not to mention that a) h_errno is not always guaranteed
* to be meaningless; b) hstrerror can reside in yet another
* library, linking for sake of hstrerror is an overkill;
* c) this path is not executed on contemporary systems
* anyway [above getaddrinfo/gai_strerror is]. We just let
* system administrator figure this out...
*/
SYSerr(SYS_F_GETHOSTBYNAME, 1000 + h_errno);
#else
SYSerr(SYS_F_GETHOSTBYNAME, WSAGetLastError());
#endif
ret = 0;
goto err;
}
}
if (service == NULL) {
se_fallback.s_port = 0;
se_fallback.s_proto = NULL;
se = &se_fallback;
} else {
char *endp = NULL;
long portnum = strtol(service, &endp, 10);
/*
* Because struct servent is defined for 32-bit pointers only with
* VMS C, we need to make sure that 'proto' is a 32-bit pointer.
*/
#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
# pragma pointer_size save
# pragma pointer_size 32
#endif
char *proto = NULL;
#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
# pragma pointer_size restore
#endif
switch (socktype) {
case SOCK_STREAM:
proto = "tcp";
break;
case SOCK_DGRAM:
proto = "udp";
break;
}
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) {
se = getservbyname(service, proto);
if (se == NULL) {
#ifndef OPENSSL_SYS_WINDOWS
SYSerr(SYS_F_GETSERVBYNAME, errno);
#else
SYSerr(SYS_F_GETSERVBYNAME, WSAGetLastError());
#endif
goto err;
}
} else {
BIOerr(BIO_F_BIO_LOOKUP_EX, BIO_R_MALFORMED_HOST_OR_SERVICE);
goto err;
}
}
*res = NULL;
{
/*
* Because hostent::h_addr_list is an array of 32-bit pointers with VMS C,
* we must make sure our iterator designates the same element type, hence
* the pointer size dance.
*/
#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
# pragma pointer_size save
# pragma pointer_size 32
#endif
char **addrlistp;
#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
# pragma pointer_size restore
#endif
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_EX, ERR_R_MALLOC_FAILURE);
ret = 0;
goto err;
}
ret = 1;
}
err:
CRYPTO_THREAD_unlock(bio_lookup_lock);
}
return ret;
}
#endif /* OPENSSL_NO_SOCK */
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