#include <assert.h>
#include <sys/types.h>
-#ifdef HAVE_ARPA_INET_H
-# include <arpa/inet.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-# include <netinet/in.h>
-#endif
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
#include <vlc_network.h>
-#ifndef NO_ADDRESS
-# define NO_ADDRESS NO_DATA
-#endif
-#ifndef INADDR_NONE
-# define INADDR_NONE 0xFFFFFFFF
-#endif
#ifndef AF_UNSPEC
# define AF_UNSPEC 0
#endif
-
-#ifndef HAVE_GAI_STRERROR
-static const struct
-{
- int code;
- const char msg[41];
-} gai_errlist[] =
-{
- { 0, "Error 0" },
- { EAI_BADFLAGS, "Invalid flag used" },
- { EAI_NONAME, "Host or service not found" },
- { EAI_AGAIN, "Temporary name service failure" },
- { EAI_FAIL, "Non-recoverable name service failure" },
- { EAI_NODATA, "No data for host name" },
- { EAI_FAMILY, "Unsupported address family" },
- { EAI_SOCKTYPE, "Unsupported socket type" },
- { EAI_SERVICE, "Incompatible service for socket type" },
- { EAI_ADDRFAMILY, "Unavailable address family for host name" },
- { EAI_MEMORY, "Memory allocation failure" },
- { EAI_OVERFLOW, "Buffer overflow" },
- { EAI_SYSTEM, "System error" },
- { 0, "" },
-};
-
-static const char gai_unknownerr[] = "Unrecognized error number";
-
-/****************************************************************************
- * Converts an EAI_* error code into human readable english text.
- ****************************************************************************/
-const char *vlc_gai_strerror (int errnum)
-{
- for (unsigned i = 0; *gai_errlist[i].msg; i++)
- if (errnum == gai_errlist[i].code)
- return gai_errlist[i].msg;
-
- return gai_unknownerr;
-}
-#else /* ifndef HAVE_GAI_STRERROR */
-const char *vlc_gai_strerror (int errnum)
-{
- return gai_strerror (errnum);
-}
-#endif
-
-#ifndef HAVE_GETNAMEINFO
-#define _NI_MASK (NI_NUMERICHOST|NI_NUMERICSERV|NI_NOFQDN|NI_NAMEREQD|\
- NI_DGRAM)
-/*
- * getnameinfo() non-thread-safe IPv4-only implementation,
- * Address-family-independent address to hostname translation
- * (reverse DNS lookup in case of IPv4).
- *
- * This is meant for use on old IP-enabled systems that are not IPv6-aware,
- * and probably do not have getnameinfo(), but have the old gethostbyaddr()
- * function.
- *
- * GNU C library 2.0.x is known to lack this function, even though it defines
- * getaddrinfo().
- */
-#ifdef WIN32
-static int WSAAPI
-stub_getnameinfo (const struct sockaddr *sa, socklen_t salen,
- char *host, DWORD hostlen, char *serv, DWORD servlen, int flags)
-#else
-static int
-stub_getnameinfo (const struct sockaddr *sa, socklen_t salen,
- char *host, int hostlen, char *serv, int servlen, int flags)
-#endif
-{
- if (((size_t)salen < sizeof (struct sockaddr_in))
- || (sa->sa_family != AF_INET))
- return EAI_FAMILY;
- else if (flags & (~_NI_MASK))
- return EAI_BADFLAGS;
- else
- {
- const struct sockaddr_in *addr;
-
- addr = (const struct sockaddr_in *)sa;
-
- if (host != NULL)
- {
- /* host name resolution */
- if (!(flags & NI_NUMERICHOST))
- {
- if (flags & NI_NAMEREQD)
- return EAI_NONAME;
- }
-
- /* inet_ntoa() is not thread-safe, do not use it */
- uint32_t ipv4 = ntohl (addr->sin_addr.s_addr);
-
- if (snprintf (host, hostlen, "%u.%u.%u.%u", ipv4 >> 24,
- (ipv4 >> 16) & 0xff, (ipv4 >> 8) & 0xff,
- ipv4 & 0xff) >= (int)hostlen)
- return EAI_OVERFLOW;
- }
-
- if (serv != NULL)
- {
- if (snprintf (serv, servlen, "%u",
- (unsigned int)ntohs (addr->sin_port)) >= (int)servlen)
- return EAI_OVERFLOW;
- }
- }
- return 0;
-}
-#undef getnameinfo
-#define getnameifo stub_getnameinfo
-#endif /* if !HAVE_GETNAMEINFO */
-
-#ifndef HAVE_GETADDRINFO
-#define _AI_MASK (AI_PASSIVE|AI_CANONNAME|AI_NUMERICHOST)
-/*
- * Converts the current herrno error value into an EAI_* error code.
- * That error code is normally returned by getnameinfo() or getaddrinfo().
- */
-static int
-gai_error_from_herrno (void)
-{
- switch (h_errno)
- {
- case HOST_NOT_FOUND:
- return EAI_NONAME;
-
- case NO_ADDRESS:
-# if (NO_ADDRESS != NO_DATA)
- case NO_DATA:
-# endif
- return EAI_NODATA;
-
- case NO_RECOVERY:
- return EAI_FAIL;
-
- case TRY_AGAIN:
- return EAI_AGAIN;
- }
- return EAI_SYSTEM;
-}
-
-/*
- * This functions must be used to free the memory allocated by getaddrinfo().
- */
-#ifdef WIN32
-static void WSAAPI stub_freeaddrinfo (struct addrinfo *res)
-#else
-static void stub_freeaddrinfo (struct addrinfo *res)
-#endif
-{
- if (res == NULL)
- return;
- free (res->ai_canonname);
- free (res->ai_addr);
- free (res->ai_next);
- free (res);
-}
-
-
-/*
- * Internal function that builds an addrinfo struct.
- */
-static struct addrinfo *
-makeaddrinfo (int af, int type, int proto,
- const struct sockaddr *addr, size_t addrlen,
- const char *canonname)
-{
- struct addrinfo *res;
-
- res = (struct addrinfo *)malloc (sizeof (struct addrinfo));
- if (res != NULL)
- {
- res->ai_flags = 0;
- res->ai_family = af;
- res->ai_socktype = type;
- res->ai_protocol = proto;
- res->ai_addrlen = addrlen;
- res->ai_addr = malloc (addrlen);
- res->ai_canonname = NULL;
- res->ai_next = NULL;
-
- if (res->ai_addr != NULL)
- {
- memcpy (res->ai_addr, addr, addrlen);
-
- if (canonname != NULL)
- {
- res->ai_canonname = strdup (canonname);
- if (res->ai_canonname != NULL)
- return res; /* success ! */
- }
- else
- return res;
- }
- }
- /* failsafe */
- vlc_freeaddrinfo (res);
- return NULL;
-}
-
-
-static struct addrinfo *
-makeipv4info (int type, int proto, u_long ip, u_short port, const char *name)
-{
- struct sockaddr_in addr;
-
- memset (&addr, 0, sizeof (addr));
- addr.sin_family = AF_INET;
-# ifdef HAVE_SA_LEN
- addr.sin_len = sizeof (addr);
-# endif
- addr.sin_port = port;
- addr.sin_addr.s_addr = ip;
-
- return makeaddrinfo (AF_INET, type, proto,
- (struct sockaddr*)&addr, sizeof (addr), name);
-}
-
-
-/*
- * getaddrinfo() non-thread-safe IPv4-only implementation
- * Address-family-independent hostname to address resolution.
- *
- * This is meant for IPv6-unaware systems that do probably not provide
- * getaddrinfo(), but still have old function gethostbyname().
- *
- * Only UDP and TCP over IPv4 are supported here.
- */
-#ifdef WIN32
-static int WSAAPI
-stub_getaddrinfo (const char *node, const char *service,
- const struct addrinfo *hints, struct addrinfo **res)
-#else
-static int
-stub_getaddrinfo (const char *node, const char *service,
- const struct addrinfo *hints, struct addrinfo **res)
-#endif
-{
- struct addrinfo *info;
- u_long ip;
- u_short port;
- int protocol = 0, flags = 0;
- const char *name = NULL;
-
-#ifdef WIN32
- /*
- * Maybe you knew already that Winsock does not handle TCP/RST packets
- * properly, so that when a TCP connection fails, it will wait until it
- * times out even if the remote host did return a TCP/RST. However, it
- * still sees the TCP/RST as the error code is 10061 instead of 10060.
- * Basically, we have the stupid brainfucked behavior with DNS queries...
- * When the recursive DNS server returns an error, Winsock waits about
- * 2 seconds before it returns to the callers, even though it should know
- * that is pointless. I'd like to know how come this hasn't been fixed
- * for the past decade, or maybe not.
- *
- * Anyway, this is causing a severe delay when the SAP listener tries
- * to resolve more than ten IPv6 numeric addresses. Modern systems will
- * eventually realize that it is an IPv6 address, and won't try to resolve
- * it as a IPv4 address via the Domain Name Service. Old systems
- * (including Windows XP without the IPv6 stack) will not. It is normally
- * not an issue as the DNS server usually returns an error very quickly.
- * But it IS a severe issue on Windows, given the bug explained above.
- * So here comes one more bug-to-bug Windows compatibility fix.
- */
- if ((node != NULL) && (strchr (node, ':') != NULL))
- return EAI_NONAME;
-#endif
-
- if (hints != NULL)
- {
- flags = hints->ai_flags;
-
- if (flags & ~_AI_MASK)
- return EAI_BADFLAGS;
- /* only accept AF_INET and AF_UNSPEC */
- if (hints->ai_family && (hints->ai_family != AF_INET))
- return EAI_FAMILY;
-
- /* protocol sanity check */
- switch (hints->ai_socktype)
- {
- case SOCK_STREAM:
- protocol = IPPROTO_TCP;
- break;
-
- case SOCK_DGRAM:
- protocol = IPPROTO_UDP;
- break;
-
-#ifndef SOCK_RAW
- case SOCK_RAW:
-#endif
- case 0:
- break;
-
- default:
- return EAI_SOCKTYPE;
- }
- if (hints->ai_protocol && protocol
- && (protocol != hints->ai_protocol))
- return EAI_SERVICE;
- }
-
- *res = NULL;
-
- /* default values */
- if (node == NULL)
- {
- if (flags & AI_PASSIVE)
- ip = htonl (INADDR_ANY);
- else
- ip = htonl (INADDR_LOOPBACK);
- }
- else
- if ((ip = inet_addr (node)) == INADDR_NONE)
- {
- struct hostent *entry = NULL;
-
- /* hostname resolution */
- if (!(flags & AI_NUMERICHOST))
- entry = gethostbyname (node);
-
- if (entry == NULL)
- return gai_error_from_herrno ();
-
- if ((entry->h_length != 4) || (entry->h_addrtype != AF_INET))
- return EAI_FAMILY;
-
- ip = *((u_long *) entry->h_addr);
- if (flags & AI_CANONNAME)
- name = entry->h_name;
- }
-
- if ((flags & AI_CANONNAME) && (name == NULL))
- name = node;
-
- /* service resolution */
- if (service == NULL)
- port = 0;
- else
- {
- unsigned long d;
- char *end;
-
- d = strtoul (service, &end, 0);
- if (end[0] || (d > 65535u))
- return EAI_SERVICE;
-
- port = htons ((u_short)d);
- }
-
- /* building results... */
- if ((!protocol) || (protocol == IPPROTO_UDP))
- {
- info = makeipv4info (SOCK_DGRAM, IPPROTO_UDP, ip, port, name);
- if (info == NULL)
- {
- errno = ENOMEM;
- return EAI_SYSTEM;
- }
- if (flags & AI_PASSIVE)
- info->ai_flags |= AI_PASSIVE;
- *res = info;
- }
- if ((!protocol) || (protocol == IPPROTO_TCP))
- {
- info = makeipv4info (SOCK_STREAM, IPPROTO_TCP, ip, port, name);
- if (info == NULL)
- {
- errno = ENOMEM;
- return EAI_SYSTEM;
- }
- info->ai_next = *res;
- if (flags & AI_PASSIVE)
- info->ai_flags |= AI_PASSIVE;
- *res = info;
- }
-
- return 0;
-}
-#undef getaddrinfo
-#define getaddrifo stub_getaddrinfo
-#undef freeaddrinfo
-#define freeaddrifo stub_freeaddrinfo
-#endif /* if !HAVE_GETADDRINFO */
-
-#if defined( WIN32 ) && !defined( UNDER_CE )
- /*
- * Here is the kind of kludge you need to keep binary compatibility among
- * varying OS versions...
- */
-typedef int (WSAAPI * GETNAMEINFO) ( const struct sockaddr FAR *, socklen_t,
- char FAR *, DWORD, char FAR *, DWORD, int );
-typedef int (WSAAPI * GETADDRINFO) (const char FAR *, const char FAR *,
- const struct addrinfo FAR *,
- struct addrinfo FAR * FAR *);
-
-typedef void (WSAAPI * FREEADDRINFO) ( struct addrinfo FAR * );
-
-static int WSAAPI _ws2_getnameinfo_bind ( const struct sockaddr FAR *, socklen_t,
- char FAR *, DWORD, char FAR *, DWORD, int );
-static int WSAAPI _ws2_getaddrinfo_bind (const char FAR *, const char FAR *,
- const struct addrinfo FAR *,
- struct addrinfo FAR * FAR *);
-
-static GETNAMEINFO ws2_getnameinfo = _ws2_getnameinfo_bind;
-static GETADDRINFO ws2_getaddrinfo = _ws2_getaddrinfo_bind;
-static FREEADDRINFO ws2_freeaddrinfo;
-
-static FARPROC ws2_find_api (LPCTSTR name)
-{
- FARPROC f = NULL;
-
- HMODULE m = GetModuleHandle (TEXT("WS2_32"));
- if (m != NULL)
- f = GetProcAddress (m, name);
-
- if (f == NULL)
- {
- /* Windows 2K IPv6 preview */
- m = LoadLibrary (TEXT("WSHIP6"));
- if (m != NULL)
- f = GetProcAddress (m, name);
- }
-
- return f;
-}
-
-static WSAAPI int _ws2_getnameinfo_bind( const struct sockaddr FAR * sa, socklen_t salen,
- char FAR *host, DWORD hostlen, char FAR *serv, DWORD servlen, int flags )
-{
- GETNAMEINFO entry = (GETNAMEINFO)ws2_find_api (TEXT("getnameinfo"));
- int result;
-
- if (entry == NULL)
- {
- /* not found, use replacement API instead */
- entry = stub_getnameinfo;
- }
- /* call API before replacing function pointer to avoid crash */
- result = entry (sa, salen, host, hostlen, serv, servlen, flags);
- ws2_getnameinfo = entry;
- return result;
-}
-#undef getnameinfo
-#define getnameinfo ws2_getnameinfo
-
-static WSAAPI int _ws2_getaddrinfo_bind(const char FAR *node, const char FAR *service,
- const struct addrinfo FAR *hints, struct addrinfo FAR * FAR *res)
-{
- GETADDRINFO entry;
- FREEADDRINFO freentry;
- int result;
-
- entry = (GETADDRINFO)ws2_find_api (TEXT("getaddrinfo"));
- freentry = (FREEADDRINFO)ws2_find_api (TEXT("freeaddrinfo"));
-
- if ((entry == NULL) || (freentry == NULL))
- {
- /* not found, use replacement API instead */
- entry = stub_getaddrinfo;
- freentry = stub_freeaddrinfo;
- }
- /* call API before replacing function pointer to avoid crash */
- result = entry (node, service, hints, res);
- ws2_freeaddrinfo = freentry;
- ws2_getaddrinfo = entry;
- return result;
-}
-#undef getaddrinfo
-#undef freeaddrinfo
-#define getaddrinfo ws2_getaddrinfo
-#define freeaddrinfo ws2_freeaddrinfo
-#define HAVE_GETADDRINFO
-#endif
-
-
int vlc_getnameinfo( const struct sockaddr *sa, int salen,
char *host, int hostlen, int *portnum, int flags )
{
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