Adding upstream version 2.9.0dev.12.upstream/2.9.0dev.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2623 insertions, 0 deletions

diff --git a/WWW/Library/Implementation/HTTCP.c b/WWW/Library/Implementation/HTTCP.c
new file mode 100644
index 0000000..a3bfda6
--- /dev/null
+++ b/WWW/Library/Implementation/HTTCP.c
@@ -0,0 +1,2623 @@
+/*
+ * $LynxId: HTTCP.c,v 1.163 2022/04/01 23:18:35 Rajeev.V.Pillai Exp $
+ *
+ *			Generic Communication Code		HTTCP.c
+ *			==========================
+ *
+ *	This code is in common between client and server sides.
+ *
+ *	16 Jan 92  TBL	Fix strtol() undefined on CMU Mach.
+ *	25 Jun 92  JFG	Added DECNET option through TCP socket emulation.
+ *	13 Sep 93  MD	Added correct return of vmserrorno for HTInetStatus.
+ *			Added decoding of vms error message for MULTINET.
+ *	7-DEC-1993 Bjorn S. Nilsson, ALEPH, CERN, VMS UCX ioctl() changes
+ *			(done of Mosaic)
+ *	19 Feb 94  Danny Mayer	Added Bjorn Fixes to Lynx version
+ *	 7 Mar 94  Danny Mayer	Added Fix UCX version for full domain name
+ *	20 May 94  Andy Harper	Added support for CMU TCP/IP transport
+ *	17 Nov 94  Andy Harper	Added support for SOCKETSHR transport
+ *	16 Jul 95  S. Bjorndahl added kluge to deal with LIBCMU bug
+ */
+
+#define LYNX_ADDRINFO	struct addrinfo
+#define LYNX_HOSTENT	struct hostent
+
+#include <HTUtils.h>
+#include <HTParse.h>
+#include <HTAlert.h>
+#include <HTTCP.h>
+#include <LYGlobalDefs.h>	/* added for no_suspend */
+#include <LYUtils.h>
+
+#ifdef NSL_FORK
+#include <signal.h>
+#include <www_wait.h>
+#define FREE_NSL_FORK(p) { FREE(p); }
+#elif defined(_WINDOWS_NSL)
+#define FREE_NSL_FORK(p) if ((p) == gbl_phost) { FREE(p); }
+#else
+#define FREE_NSL_FORK(p)	/* nothing */
+#endif /* NSL_FORK */
+
+#ifdef HAVE_RESOLV_H
+#include <resolv.h>
+#endif
+
+#ifdef __DJGPP__
+#include <netdb.h>
+#endif /* __DJGPP__ */
+
+#define OK_HOST(p) ((p) != 0 && ((p)->h_length) != 0)
+
+#ifdef SVR4_BSDSELECT
+int BSDselect(int nfds,
+	      fd_set * readfds,
+	      fd_set * writefds,
+	      fd_set * exceptfds,
+	      struct timeval *select_timeout);
+
+#ifdef select
+#undef select
+#endif /* select */
+#define select BSDselect
+#ifdef SOCKS
+#ifdef Rselect
+#undef Rselect
+#endif /* Rselect */
+#define Rselect BSDselect
+#endif /* SOCKS */
+#endif /* SVR4_BSDSELECT */
+
+#include <LYLeaks.h>
+
+/*
+ *  Module-Wide variables
+ */
+static char *hostname = NULL;	/* The name of this host */
+
+/*
+ *  PUBLIC VARIABLES
+ */
+#ifdef SOCKS
+unsigned long socks_bind_remoteAddr;	/* for long Rbind */
+#endif /* SOCKS */
+
+/*	Encode INET status (as in sys/errno.h)			  inet_status()
+ *	------------------
+ *
+ *  On entry,
+ *	where		gives a description of what caused the error
+ *	global errno	gives the error number in the Unix way.
+ *
+ *  On return,
+ *	returns		a negative status in the Unix way.
+ */
+
+#ifdef DECL_SYS_ERRLIST
+extern char *sys_errlist[];	/* see man perror on cernvax */
+extern int sys_nerr;
+#endif /* DECL_SYS_ERRLIST */
+
+#ifdef __DJGPP__
+static int ResolveYield(void)
+{
+    return HTCheckForInterrupt()? 0 : 1;
+}
+#endif
+
+#if defined(VMS) && defined(UCX)
+/*
+ *  A routine to mimic the ioctl function for UCX.
+ *  Bjorn S. Nilsson, 25-Nov-1993. Based on an example in the UCX manual.
+ */
+#include <HTioctl.h>
+
+int HTioctl(int d,
+	    int request,
+	    int *argp)
+{
+    int sdc, status;
+    unsigned short fun, iosb[4];
+    char *p5, *p6;
+    struct comm {
+	int command;
+	char *addr;
+    } ioctl_comm;
+    struct it2 {
+	unsigned short len;
+	unsigned short opt;
+	struct comm *addr;
+    } ioctl_desc;
+
+    if ((sdc = vaxc$get_sdc(d)) == 0) {
+	set_errno(EBADF);
+	return -1;
+    }
+    ioctl_desc.opt = UCX$C_IOCTL;
+    ioctl_desc.len = sizeof(struct comm);
+
+    ioctl_desc.addr = &ioctl_comm;
+    if (request & IOC_OUT) {
+	fun = IO$_SENSEMODE;
+	p5 = 0;
+	p6 = (char *) &ioctl_desc;
+    } else {
+	fun = IO$_SETMODE;
+	p5 = (char *) &ioctl_desc;
+	p6 = 0;
+    }
+    ioctl_comm.command = request;
+    ioctl_comm.addr = (char *) argp;
+    status = sys$qiow(0, sdc, fun, iosb, 0, 0, 0, 0, 0, 0, p5, p6);
+    if (!(status & 01)) {
+	set_errno(status);
+	return -1;
+    }
+    if (!(iosb[0] & 01)) {
+	set_errno(iosb[0]);
+	return -1;
+    }
+    return 0;
+}
+#endif /* VMS && UCX */
+
+#define MY_FORMAT "TCP: Error %d in `SOCKET_ERRNO' after call to %s() failed.\n\t%s\n"
+	   /* third arg is transport/platform specific */
+
+/*	Report Internet Error
+ *	---------------------
+ */
+int HTInetStatus(const char *where)
+{
+    int status;
+    int saved_errno = errno;
+
+#ifdef VMS
+#ifdef MULTINET
+    SOCKET_ERRNO = vmserrno;
+#endif /* MULTINET */
+#endif /* VMS */
+
+#ifdef VM
+    CTRACE((tfp, MY_FORMAT, SOCKET_ERRNO, where,
+	    "(Error number not translated)"));	/* What Is the VM equiv? */
+#define ER_NO_TRANS_DONE
+#endif /* VM */
+
+#ifdef VMS
+#ifdef MULTINET
+    CTRACE((tfp, MY_FORMAT, SOCKET_ERRNO, where,
+	    vms_errno_string()));
+#else
+    CTRACE((tfp, MY_FORMAT, SOCKET_ERRNO, where,
+	    ((SOCKET_ERRNO > 0 && SOCKET_ERRNO <= 65) ?
+	     strerror(SOCKET_ERRNO) : "(Error number not translated)")));
+#endif /* MULTINET */
+#define ER_NO_TRANS_DONE
+#endif /* VMS */
+
+#ifdef HAVE_STRERROR
+    CTRACE((tfp, MY_FORMAT, SOCKET_ERRNO, where,
+	    strerror(SOCKET_ERRNO)));
+#define ER_NO_TRANS_DONE
+#endif /* HAVE_STRERROR */
+
+#ifndef ER_NO_TRANS_DONE
+    CTRACE((tfp, MY_FORMAT, SOCKET_ERRNO, where,
+	    (SOCKET_ERRNO < sys_nerr ?
+	     sys_errlist[SOCKET_ERRNO] : "Unknown error")));
+#endif /* !ER_NO_TRANS_DONE */
+
+#ifdef VMS
+#ifndef MULTINET
+    CTRACE((tfp,
+	    "         Unix error number (SOCKET_ERRNO) = %ld dec\n",
+	    SOCKET_ERRNO));
+    CTRACE((tfp,
+	    "         VMS error (vaxc$errno)    = %lx hex\n",
+	    vaxc$errno));
+#endif /* MULTINET */
+#endif /* VMS */
+
+    set_errno(saved_errno);
+
+#ifdef VMS
+    /*
+     * uerrno and errno happen to be zero if vmserrno <> 0
+     */
+#ifdef MULTINET
+    status = -vmserrno;
+#else
+    status = -vaxc$errno;
+#endif /* MULTINET */
+#else
+    status = -SOCKET_ERRNO;
+#endif /* VMS */
+    return status;
+}
+
+/*	Parse a cardinal value				       parse_cardinal()
+ *	----------------------
+ *
+ * On entry,
+ *	*pp	    points to first character to be interpreted, terminated by
+ *		    non 0:9 character.
+ *	*pstatus    points to status already valid
+ *	maxvalue    gives the largest allowable value.
+ *
+ * On exit,
+ *	*pp	    points to first unread character
+ *	*pstatus    points to status updated iff bad
+ */
+unsigned int HTCardinal(int *pstatus,
+			char **pp,
+			unsigned int max_value)
+{
+    unsigned int n;
+
+    if ((**pp < '0') || (**pp > '9')) {		/* Null string is error */
+	*pstatus = -3;		/* No number where one expected */
+	return 0;
+    }
+
+    n = 0;
+    while ((**pp >= '0') && (**pp <= '9'))
+	n = n * 10 + (unsigned) (*((*pp)++) - '0');
+
+    if (n > max_value) {
+	*pstatus = -4;		/* Cardinal outside range */
+	return 0;
+    }
+
+    return n;
+}
+
+#ifndef DECNET			/* Function only used below for a trace message */
+/*	Produce a string for an Internet address
+ *	----------------------------------------
+ *
+ *  On exit,
+ *	returns a pointer to a static string which must be copied if
+ *		it is to be kept.
+ */
+const char *HTInetString(LY_SOCKADDR * soc_A)
+{
+#ifdef INET6
+    static char hostbuf[MAXHOSTNAMELEN];
+    struct sockaddr *soc_addr = &(soc_A->soc_address);
+
+    getnameinfo(soc_addr,
+		SA_LEN(soc_addr),
+		hostbuf, (socklen_t) sizeof(hostbuf),
+		NULL, 0,
+		NI_NUMERICHOST);
+    return hostbuf;
+#else
+    struct sockaddr_in *soc_in = &(soc_A->soc_in);
+    static char string[20];
+
+    sprintf(string, "%d.%d.%d.%d",
+	    (int) *((unsigned char *) (&soc_in->sin_addr) + 0),
+	    (int) *((unsigned char *) (&soc_in->sin_addr) + 1),
+	    (int) *((unsigned char *) (&soc_in->sin_addr) + 2),
+	    (int) *((unsigned char *) (&soc_in->sin_addr) + 3));
+    return string;
+#endif /* INET6 */
+}
+#endif /* !DECNET */
+
+/*	Check whether string is a valid Internet hostname - kw
+ *	-------------------------------------------------
+ *
+ *  Checks whether
+ *  - contains only valid chars for domain names (actually, the
+ *    restrictions are somewhat relaxed),
+ *  - no leading dots or empty segments,
+ *  - no segment starts with '-' or '+' [this protects telnet command],
+ *  - max. length of dot-separated segment <= 63 (RFC 1034,1035),
+ *  - total length <= 254 (if it ends with dot) or 253 (otherwise)
+ *     [an interpretation of RFC 1034,1035, although RFC 1123
+ *      suggests 255 as limit - kw].
+ *
+ *  Note: user (before '@') and port (after ':') components from
+ *      host part of URL should be already stripped (if appropriate)
+ *      from the input string.
+ *
+ *  On exit,
+ *	returns 1 if valid, otherwise 0.
+ */
+BOOL valid_hostname(char *name)
+{
+    int i = 1, iseg = 0;
+    char *cp = name;
+
+    if (!(name && *name))
+	return NO;
+    for (; (*cp && i <= 253); cp++, i++) {
+	if (*cp == '.') {
+	    if (iseg == 0) {
+		return NO;
+	    } else {
+		iseg = 0;
+		continue;
+	    }
+	} else if (iseg == 0 && (*cp == '-' || *cp == '+')) {
+	    return NO;
+	} else if (++iseg > 63) {
+	    return NO;
+	}
+	if (!isalnum(UCH(*cp)) &&
+	    *cp != '-' && *cp != '_' &&
+	    *cp != '$' && *cp != '+') {
+	    return NO;
+	}
+    }
+    return (BOOL) (*cp == '\0' || (*cp == '.' && iseg != 0 && cp[1] == '\0'));
+}
+
+/* for transfer of status from child to parent: */
+typedef struct _statuses {
+    size_t rehostentlen;
+    int h_length;
+    int child_errno;		/* sometimes useful to pass this on */
+    int child_h_errno;
+    BOOL h_errno_valid;
+} STATUSES;
+
+/*
+ *  Function to allow us to be killed with a normal signal (not
+ *  SIGKILL), but don't go through normal libc exit() processing, which
+ *  would screw up parent's stdio.  -BL
+ */
+#ifdef NSL_FORK
+static void quench(int sig GCC_UNUSED)
+{
+    _exit(2);
+}
+#endif
+
+int lynx_nsl_status = HT_OK;
+
+#define DEBUG_HOSTENT		/* disable in case of problems */
+#define DEBUG_HOSTENT_CHILD	/* for NSL_FORK, may screw up trace file */
+
+/*
+ *  dump_hostent - dumps the contents of a LYNX_HOSTENT to the
+ *  trace log or stderr, including all pointer values, strings, and
+ *  addresses, in a format inspired by gdb's print format. - kw
+ */
+static void dump_hostent(const char *msgprefix,
+			 const void *data)
+{
+    if (TRACE) {
+	int i;
+	char **pcnt;
+	const LYNX_HOSTENT *phost = data;
+
+	CTRACE((tfp, "%s: %p ", msgprefix, (const void *) phost));
+	if (phost) {
+	    CTRACE((tfp, "{ h_name = %p", (void *) phost->h_name));
+	    if (phost->h_name) {
+		CTRACE((tfp, " \"%s\",", phost->h_name));
+	    } else {
+		CTRACE((tfp, ","));
+	    }
+	    CTRACE((tfp, "\n\t h_aliases = %p", (void *) phost->h_aliases));
+	    if (phost->h_aliases) {
+		CTRACE((tfp, " {"));
+		for (pcnt = phost->h_aliases; *pcnt; pcnt++) {
+		    CTRACE((tfp, "%s %p \"%s\"",
+			    (pcnt == phost->h_aliases ? " " : ", "),
+			    (void *) *pcnt, *pcnt));
+		}
+		CTRACE((tfp, "%s0x0 },\n\t",
+			(*phost->h_aliases ? ", " : " ")));
+	    } else {
+		CTRACE((tfp, ",\n\t"));
+	    }
+	    CTRACE((tfp, " h_addrtype = %d,", phost->h_addrtype));
+	    CTRACE((tfp, " h_length = %d,\n\t", phost->h_length));
+	    CTRACE((tfp, " h_addr_list = %p", (void *) phost->h_addr_list));
+	    if (phost->h_addr_list) {
+		CTRACE((tfp, " {"));
+		for (pcnt = phost->h_addr_list; *pcnt; pcnt++) {
+		    CTRACE((tfp, "%s %p",
+			    (pcnt == phost->h_addr_list ? "" : ","),
+			    (void *) *pcnt));
+		    for (i = 0; i < phost->h_length; i++) {
+			CTRACE((tfp, "%s%d%s", (i == 0 ? " \"" : "."),
+				(int) *((unsigned char *) (*pcnt) + i),
+				(i + 1 == phost->h_length ? "\"" : "")));
+		    }
+		}
+		if (*phost->h_addr_list) {
+		    CTRACE((tfp, ", 0x0 } }"));
+		} else {
+		    CTRACE((tfp, " 0x0 } }"));
+		}
+	    } else {
+		CTRACE((tfp, "}"));
+	    }
+	}
+	CTRACE((tfp, "\n"));
+	fflush(tfp);
+    }
+}
+
+#ifdef NSL_FORK
+
+/*
+ * Even though it is a small amount, we cannot count on reading the whole
+ * struct via a pipe in one read -TD
+ */
+static unsigned read_bytes(int fd, char *buffer, size_t length)
+{
+    unsigned result = 0;
+
+    while (length != 0) {
+	unsigned got = (unsigned) read(fd, buffer, length);
+
+	if ((int) got > 0) {
+	    result += got;
+	    buffer += got;
+	    length -= got;
+	} else {
+	    break;
+	}
+    }
+    return result;
+}
+
+static unsigned read_hostent(int fd, char *buffer, size_t length)
+{
+    unsigned have = read_bytes(fd, buffer, length);
+
+    if (have) {
+	LYNX_HOSTENT *data = (LYNX_HOSTENT *) (void *) buffer;
+	char *next_char = (char *) data + sizeof(*data);
+	char **next_ptr = (char **) (void *) next_char;
+	long offset = 0;
+	int n;
+	int num_addrs = 0;
+	int num_aliases = 0;
+
+	if (data->h_addr_list) {
+	    data->h_addr_list = next_ptr;
+	    while (next_ptr[num_addrs] != 0) {
+		++num_addrs;
+	    }
+	    next_ptr += (num_addrs + 1);
+	    next_char += (size_t) (num_addrs + 1) * sizeof(data->h_addr_list[0]);
+	}
+
+	if (data->h_aliases) {
+	    data->h_aliases = next_ptr;
+	    while (next_ptr[num_aliases] != 0) {
+		++num_aliases;
+	    }
+	    next_char += (size_t) (num_aliases + 1) * sizeof(data->h_aliases[0]);
+	}
+
+	if (data->h_name) {
+	    offset = next_char - data->h_name;
+	    data->h_name = next_char;
+	} else if (data->h_addr_list) {
+	    offset = next_char - (char *) data->h_addr_list[0];
+	} else if (data->h_aliases) {
+	    offset = next_char - (char *) data->h_aliases[0];
+	}
+
+	if (data->h_addr_list) {
+	    for (n = 0; n < num_addrs; ++n) {
+		data->h_addr_list[n] += offset;
+	    }
+	}
+
+	if (data->h_aliases) {
+	    for (n = 0; n < num_aliases; ++n) {
+		data->h_aliases[n] += offset;
+	    }
+	}
+    }
+
+    return have;
+}
+#endif /* NSL_FORK */
+
+/*
+ *  fill_rehostent - copies as much as possible relevant content from
+ *  the LYNX_HOSTENT pointed to by phost to the char buffer given
+ *  by rehostent, subject to maximum output length rehostentsize,
+ *  following pointers and building self-contained output which can be
+ *  cast to a LYNX_HOSTENT. - kw
+ *  See also description of LYGetHostByName.
+ */
+#if defined(NSL_FORK) || defined(_WINDOWS_NSL)
+
+#define REHOSTENT_SIZE 128	/* not bigger than pipe buffer! */
+
+typedef struct {
+    LYNX_HOSTENT h;
+    char rest[REHOSTENT_SIZE];
+} AlignedHOSTENT;
+
+static size_t fill_rehostent(void **rehostent,
+			     const LYNX_HOSTENT *phost)
+{
+    static const char *this_func = "fill_rehostent";
+
+    LYNX_HOSTENT *data = 0;
+    int num_addrs = 0;
+    int num_aliases = 0;
+    char *result = 0;
+    char *p_next_char;
+    char **p_next_charptr;
+    size_t name_len = 0;
+    size_t need = sizeof(LYNX_HOSTENT);
+    int n;
+
+    if (!phost)
+	return 0;
+
+    if (phost->h_name) {
+	name_len = strlen(phost->h_name);
+	need += name_len + 1;
+    }
+    if (phost->h_addr_list) {
+	while (phost->h_addr_list[num_addrs]) {
+	    num_addrs++;
+	}
+	need += ((size_t) num_addrs + 1) * ((size_t) phost->h_length
+					    + sizeof(phost->h_addr_list[0]));
+    }
+    if (phost->h_aliases) {
+	while (phost->h_aliases[num_aliases]) {
+	    need += strlen(phost->h_aliases[num_aliases]) + 1;
+	    num_aliases++;
+	}
+	need += ((size_t) num_aliases + 1) * sizeof(phost->h_aliases[0]);
+    }
+
+    if ((result = calloc(need, sizeof(char))) == 0)
+	  outofmem(__FILE__, this_func);
+
+    *rehostent = result;
+
+    data = (LYNX_HOSTENT *) (void *) result;
+
+    data->h_addrtype = phost->h_addrtype;
+    data->h_length = phost->h_length;
+
+    p_next_char = result + sizeof(LYNX_HOSTENT);
+
+    p_next_charptr = (char **) (void *) p_next_char;
+    if (phost->h_addr_list)
+	p_next_char += (size_t) (num_addrs + 1) * sizeof(phost->h_addr_list[0]);
+    if (phost->h_aliases)
+	p_next_char += (size_t) (num_aliases + 1) * sizeof(phost->h_aliases[0]);
+
+    if (phost->h_name) {
+	data->h_name = p_next_char;
+	strcpy(p_next_char, phost->h_name);
+	p_next_char += name_len + 1;
+    }
+
+    if (phost->h_addr_list) {
+	data->h_addr_list = p_next_charptr;
+	for (n = 0; n < num_addrs; ++n) {
+	    MemCpy(p_next_char, phost->h_addr_list[n], phost->h_length);
+	    *p_next_charptr++ = p_next_char;
+	    p_next_char += phost->h_length;
+	}
+	++p_next_charptr;
+    }
+
+    if (phost->h_aliases) {
+	data->h_aliases = p_next_charptr;
+	for (n = 0; n < num_aliases; ++n) {
+	    strcpy(p_next_char, phost->h_aliases[n]);
+	    *p_next_charptr++ = p_next_char;
+	    p_next_char += strlen(phost->h_aliases[n]) + 1;;
+	}
+    }
+    return need;
+}
+#endif /* NSL_FORK */
+
+/*
+ * This chunk of code is used in both win32 and cygwin.
+ */
+#if defined(_WINDOWS_NSL)
+static LYNX_HOSTENT *gbl_phost;	/* Pointer to host - See netdb.h */
+
+#if !(defined(__CYGWIN__) && defined(NSL_FORK))
+static int donelookup;
+
+static unsigned long __stdcall _fork_func(void *arg)
+{
+    const char *host = (const char *) arg;
+    static AlignedHOSTENT aligned_full_rehostent;
+    char *rehostent = (char *) &aligned_full_rehostent;
+    size_t rehostentlen = 0;
+
+#ifdef SH_EX
+    unsigned long addr;
+
+    addr = (unsigned long) inet_addr(host);
+    if (addr != INADDR_NONE)
+	gbl_phost = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
+    else
+	gbl_phost = gethostbyname(host);
+#else
+    gbl_phost = gethostbyname(host);
+#endif
+
+    if (gbl_phost) {
+	rehostentlen = fill_rehostent((void **) &rehostent, gbl_phost);
+	if (rehostentlen == 0) {
+	    gbl_phost = (LYNX_HOSTENT *) NULL;
+	} else {
+	    gbl_phost = (LYNX_HOSTENT *) rehostent;
+	}
+    }
+
+    donelookup = TRUE;
+    return (unsigned long) (gbl_phost);
+}
+#endif /* __CYGWIN__ */
+#endif /* _WINDOWS_NSL */
+
+#ifdef NSL_FORK
+
+#ifndef HAVE_H_ERRNO
+#undef  h_errno
+#define h_errno my_errno
+static int my_errno;
+
+#else /* we do HAVE_H_ERRNO: */
+#ifndef h_errno			/* there may be a macro as well as the extern data */
+extern int h_errno;
+#endif
+#endif
+
+static BOOL setup_nsl_fork(void (*really) (const char *,
+					   const char *,
+					   STATUSES *,
+					   void **),
+			   unsigned (*readit) (int, char *, size_t),
+			   void (*dumpit) (const char *, const void *),
+			   const char *host,
+			   const char *port,
+			   void **rehostent)
+{
+    static const char *this_func = "setup_nsl_fork";
+
+    STATUSES statuses;
+
+    /*
+     * fork-based gethostbyname() with checks for interrupts.
+     * - Tom Zerucha (tz@execpc.com) & FM
+     */
+    int got_rehostent = 0;
+
+#if HAVE_SIGACTION
+    sigset_t old_sigset;
+    sigset_t new_sigset;
+#endif
+    /*
+     * Pipe, child pid, status buffers, start time, select() control
+     * variables.
+     */
+    int fpid, waitret;
+    int pfd[2], selret;
+    unsigned readret;
+
+#ifdef HAVE_TYPE_UNIONWAIT
+    union wait waitstat;
+
+#else
+    int waitstat = 0;
+#endif
+    time_t start_time = time((time_t *) 0);
+    fd_set readfds;
+    struct timeval one_second;
+    long dns_patience = 30;	/* how many seconds will we wait for DNS? */
+    int child_exited = 0;
+
+    memset(&statuses, 0, sizeof(STATUSES));
+    statuses.h_errno_valid = NO;
+
+    /*
+     * Reap any children that have terminated since last time through.
+     * This might include children that we killed, then waited with WNOHANG
+     * before they were actually ready to be reaped.  (Should be max of 1
+     * in this state, but the loop is safe if waitpid() is implemented
+     * correctly:  returns 0 when children exist but none have exited; -1
+     * with errno == ECHILD when no children.) -BL
+     */
+    do {
+	waitret = waitpid(-1, 0, WNOHANG);
+    } while (waitret > 0 || (waitret == -1 && errno == EINTR));
+    waitret = 0;
+
+    IGNORE_RC(pipe(pfd));
+
+#if HAVE_SIGACTION
+    /*
+     * Attempt to prevent a rare situation where the child could execute
+     * the Lynx signal handlers because it gets killed before it even has a
+     * chance to reset its handlers, resulting in bogus 'Exiting via
+     * interrupt' message and screen corruption or worse.
+     * Should that continue to be reported, for systems without
+     * sigprocmask(), we need to find a different solutions for those.  -
+     * kw 19990430
+     */
+    sigemptyset(&new_sigset);
+    sigaddset(&new_sigset, SIGTERM);
+    sigaddset(&new_sigset, SIGINT);
+#ifndef NOSIGHUP
+    sigaddset(&new_sigset, SIGHUP);
+#endif /* NOSIGHUP */
+#ifdef SIGTSTP
+    sigaddset(&new_sigset, SIGTSTP);
+#endif /* SIGTSTP */
+#ifdef SIGWINCH
+    sigaddset(&new_sigset, SIGWINCH);
+#endif /* SIGWINCH */
+    sigprocmask(SIG_BLOCK, &new_sigset, &old_sigset);
+#endif /* HAVE_SIGACTION */
+
+    if ((fpid = fork()) == 0) {
+	/*
+	 * Child - for the long call.
+	 *
+	 * Make sure parent can kill us at will.  -BL
+	 */
+	(void) signal(SIGTERM, quench);
+
+	/*
+	 * Also make sure the child does not run one of the signal handlers
+	 * that may have been installed by Lynx if one of those signals
+	 * occurs.  For example we don't want the child to remove temp
+	 * files on ^C, let the parent deal with that.  - kw
+	 */
+	(void) signal(SIGINT, quench);
+#ifndef NOSIGHUP
+	(void) signal(SIGHUP, quench);
+#endif /* NOSIGHUP */
+#ifdef SIGTSTP
+	if (no_suspend)
+	    (void) signal(SIGTSTP, SIG_IGN);
+	else
+	    (void) signal(SIGTSTP, SIG_DFL);
+#endif /* SIGTSTP */
+#ifdef SIGWINCH
+	(void) signal(SIGWINCH, SIG_IGN);
+#endif /* SIGWINCH */
+#ifndef __linux__
+#ifndef DOSPATH
+	signal(SIGBUS, SIG_DFL);
+#endif /* DOSPATH */
+#endif /* !__linux__ */
+	signal(SIGSEGV, SIG_DFL);
+	signal(SIGILL, SIG_DFL);
+
+#if HAVE_SIGACTION
+	/* Restore signal mask to whatever it was before the fork. -kw */
+	sigprocmask(SIG_SETMASK, &old_sigset, NULL);
+#endif /* HAVE_SIGACTION */
+
+	/*
+	 * Child won't use read side.  -BL
+	 */
+	close(pfd[0]);
+#ifdef HAVE_H_ERRNO
+	/* to detect cases when it doesn't get set although it should */
+	h_errno = -2;
+#endif
+	set_errno(0);
+	really(host, port, &statuses, rehostent);
+	/*
+	 * Send variables indicating status of lookup to parent.  That
+	 * includes rehostentlen, which the parent will use as the size for
+	 * the second read (if > 0).
+	 */
+	if (!statuses.child_errno)
+	    statuses.child_errno = errno;
+	IGNORE_RC(write(pfd[1], &statuses, sizeof(statuses)));
+
+	if (statuses.rehostentlen) {
+	    /*
+	     * Return our resulting rehostent through pipe...
+	     */
+	    IGNORE_RC(write(pfd[1], *rehostent, statuses.rehostentlen));
+	    close(pfd[1]);
+	    _exit(0);
+	} else {
+	    /*
+	     * ...  or return error as exit code.
+	     */
+	    _exit(1);
+	}
+    }
+#if HAVE_SIGACTION
+    /*
+     * (parent) Restore signal mask to whatever it was before the fork.  -
+     * kw
+     */
+    sigprocmask(SIG_SETMASK, &old_sigset, NULL);
+#endif /* HAVE_SIGACTION */
+
+    /*
+     * (parent) Wait until lookup finishes, or interrupt, or cycled too
+     * many times (just in case) -BL
+     */
+
+    close(pfd[1]);		/* parent won't use write side -BL */
+
+    if (fpid < 0) {		/* fork failed */
+	close(pfd[0]);
+	goto failed;
+    }
+
+    while (child_exited || (long) (time((time_t *) 0) - start_time) < dns_patience) {
+
+	FD_ZERO(&readfds);
+	/*
+	 * This allows us to abort immediately, not after 1-second timeout,
+	 * when user hits abort key.  Can't do this when using SLANG (or at
+	 * least I don't know how), so SLANG users must live with up-to-1s
+	 * timeout.  -BL
+	 *
+	 * Whoops -- we need to make sure stdin is actually selectable!
+	 * /dev/null isn't, on some systems, which makes some useful Lynx
+	 * invocations fail.  -BL
+	 */
+	{
+	    int kbd_fd = LYConsoleInputFD(TRUE);
+
+	    if (kbd_fd != INVSOC) {
+		FD_SET(kbd_fd, &readfds);
+	    }
+	}
+
+	one_second.tv_sec = 1;
+	one_second.tv_usec = 0;
+	FD_SET(pfd[0], &readfds);
+
+	/*
+	 * Return when data received, interrupted, or failed.  If nothing
+	 * is waiting, we sleep for 1 second in select(), to be nice to the
+	 * system.  -BL
+	 */
+#ifdef SOCKS
+	if (socks_flag)
+	    selret = Rselect(pfd[0] + 1, &readfds, NULL, NULL, &one_second);
+	else
+#endif /* SOCKS */
+	    selret = select(pfd[0] + 1, &readfds, NULL, NULL, &one_second);
+
+	if ((selret > 0) && FD_ISSET(pfd[0], &readfds)) {
+	    /*
+	     * First get status, including length of address.  -BL, kw
+	     */
+	    readret = read_bytes(pfd[0], (char *) &statuses, sizeof(statuses));
+	    if (readret == sizeof(statuses)) {
+		h_errno = statuses.child_h_errno;
+		set_errno(statuses.child_errno);
+#ifdef HAVE_H_ERRNO
+		if (statuses.h_errno_valid) {
+		    lynx_nsl_status = HT_H_ERRNO_VALID;
+		    /*
+		     * If something went wrong in the child process other
+		     * than normal lookup errors, and it appears that we
+		     * have enough info to know what went wrong, generate
+		     * diagnostic output.  ENOMEM observed on linux in
+		     * processes constrained with ulimit.  It would be too
+		     * unkind to abort the session, access to local files
+		     * or through a proxy may still work.  - kw
+		     */
+		    if (
+#ifdef NETDB_INTERNAL		/* linux glibc: defined in netdb.h */
+			   (errno && h_errno == NETDB_INTERNAL) ||
+#endif
+			   (errno == ENOMEM &&
+			    statuses.rehostentlen == 0 &&
+		    /* should probably be NETDB_INTERNAL if child
+		       memory exhausted, but we may find that
+		       h_errno remains unchanged. - kw */
+			    h_errno == -2)) {
+#ifndef MULTINET
+			HTInetStatus("CHILD gethostbyname");
+#endif
+			HTAlert(LYStrerror(statuses.child_errno));
+			if (errno == ENOMEM) {
+			    /*
+			     * Not much point in continuing, right?  Fake a
+			     * 'z', should shorten pointless guessing
+			     * cycle.  - kw
+			     */
+			    LYFakeZap(YES);
+			}
+		    }
+		}
+#endif /* HAVE_H_ERRNO */
+		if (statuses.rehostentlen != 0) {
+		    /*
+		     * Then get the full reorganized hostent.  -BL, kw
+		     */
+		    if ((*rehostent = malloc(statuses.rehostentlen)) == 0)
+			outofmem(__FILE__, this_func);
+		    readret = (*readit) (pfd[0], *rehostent, statuses.rehostentlen);
+#ifdef DEBUG_HOSTENT
+		    dumpit("Read from pipe", *rehostent);
+#endif
+		    if (readret == statuses.rehostentlen) {
+			got_rehostent = 1;
+			lynx_nsl_status = HT_OK;
+		    } else if (!statuses.h_errno_valid) {
+			lynx_nsl_status = HT_INTERNAL;
+		    }
+		}
+	    } else {
+		lynx_nsl_status = HT_ERROR;
+	    }
+	    /*
+	     * Make sure child is cleaned up.  -BL
+	     */
+	    if (!child_exited)
+		waitret = waitpid(fpid, &waitstat, WNOHANG);
+	    if (!WIFEXITED(waitstat) && !WIFSIGNALED(waitstat)) {
+		kill(fpid, SIGTERM);
+		waitret = waitpid(fpid, &waitstat, WNOHANG);
+	    }
+	    break;
+	}
+
+	/*
+	 * Clean up if child exited before & no data received.  -BL
+	 */
+	if (child_exited) {
+	    waitret = waitpid(fpid, &waitstat, WNOHANG);
+	    break;
+	}
+	/*
+	 * If child exited, loop once more looking for data.  -BL
+	 */
+	if ((waitret = waitpid(fpid, &waitstat, WNOHANG)) > 0) {
+	    /*
+	     * Data will be arriving right now, so make sure we don't
+	     * short-circuit out for too many loops, and skip the interrupt
+	     * check.  -BL
+	     */
+	    child_exited = 1;
+	    continue;
+	}
+
+	/*
+	 * Abort if interrupt key pressed.
+	 */
+	if (HTCheckForInterrupt()) {
+	    CTRACE((tfp, "%s: INTERRUPTED gethostbyname.\n", this_func));
+	    kill(fpid, SIGTERM);
+	    waitpid(fpid, NULL, WNOHANG);
+	    close(pfd[0]);
+	    lynx_nsl_status = HT_INTERRUPTED;
+	    return FALSE;
+	}
+    }
+    close(pfd[0]);
+    if (waitret <= 0) {
+	kill(fpid, SIGTERM);
+	waitret = waitpid(fpid, &waitstat, WNOHANG);
+    }
+    if (waitret > 0) {
+	if (WIFEXITED(waitstat)) {
+	    CTRACE((tfp,
+		    "%s: NSL_FORK child %d exited, status 0x%x.\n",
+		    this_func, (int) waitret, WEXITSTATUS(waitstat)));
+	} else if (WIFSIGNALED(waitstat)) {
+	    CTRACE((tfp,
+		    "%s: NSL_FORK child %d got signal, status 0x%x!\n",
+		    this_func, (int) waitret, WTERMSIG(waitstat)));
+#ifdef WCOREDUMP
+	    if (WCOREDUMP(waitstat)) {
+		CTRACE((tfp,
+			"%s: NSL_FORK child %d dumped core!\n",
+			this_func, (int) waitret));
+	    }
+#endif /* WCOREDUMP */
+	} else if (WIFSTOPPED(waitstat)) {
+	    CTRACE((tfp,
+		    "%s: NSL_FORK child %d is stopped, status 0x%x!\n",
+		    this_func, (int) waitret, WSTOPSIG(waitstat)));
+	}
+    }
+    if (!got_rehostent) {
+	goto failed;
+    }
+    return TRUE;
+  failed:
+    return FALSE;
+}
+
+/*
+ * This is called via the child-side of the fork.
+ */
+static void really_gethostbyname(const char *host,
+				 const char *port GCC_UNUSED,
+				 STATUSES * statuses,
+				 void **rehostent)
+{
+    LYNX_HOSTENT *phost;	/* Pointer to host - See netdb.h */
+    LYNX_HOSTENT *result = 0;
+
+    (void) port;
+
+    phost = gethostbyname(host);
+    statuses->rehostentlen = 0;
+    statuses->child_errno = errno;
+    statuses->child_h_errno = h_errno;
+#ifdef HAVE_H_ERRNO
+    statuses->h_errno_valid = YES;
+#endif
+#ifdef MVS
+    CTRACE((tfp, "really_gethostbyname() returned %d\n", phost));
+#endif /* MVS */
+
+#ifdef DEBUG_HOSTENT_CHILD
+    dump_hostent("CHILD gethostbyname", phost);
+#endif
+    if (OK_HOST(phost)) {
+	statuses->rehostentlen = fill_rehostent(rehostent, phost);
+	result = (LYNX_HOSTENT *) (*rehostent);
+#ifdef DEBUG_HOSTENT_CHILD
+	dump_hostent("CHILD fill_rehostent", result);
+#endif
+    }
+    if (statuses->rehostentlen <= sizeof(LYNX_HOSTENT) || !OK_HOST(result)) {
+	statuses->rehostentlen = 0;
+	statuses->h_length = 0;
+    } else {
+	statuses->h_length = result->h_length;
+#ifdef HAVE_H_ERRNO
+	if (h_errno == -2)	/* success, but h_errno unchanged? */
+	    statuses->h_errno_valid = NO;
+#endif
+    }
+}
+#endif /* NSL_FORK */
+
+/*	Resolve an internet hostname, like gethostbyname
+ *	------------------------------------------------
+ *
+ *  On entry,
+ *	host	points to the given host name, not numeric address,
+ *		without colon or port number.
+ *
+ *  On exit,
+ *	returns a pointer to a LYNX_HOSTENT in static storage,
+ *	or NULL in case of error or user interruption.
+ *
+ *  The interface is intended to be exactly the same as for (Unix)
+ *  gethostbyname(), except for the following:
+ *
+ *  If NSL_FORK is not used, the result of gethostbyname is returned
+ *  directly.  Otherwise:
+ *  All lists, addresses, and strings referred to by pointers in the
+ *  returned struct are located, together with the returned struct
+ *  itself, in a buffer of size REHOSTENT_SIZE.  If not everything fits,
+ *  some info is omitted, but the function is careful to still return
+ *  a valid structure, without truncating strings; it tries to return,
+ *  in order of decreasing priority, the first address (h_addr_list[0]), the
+ *  official name (h_name), the additional addresses, then alias names.
+ *
+ *  If NULL is returned, the reason is made available in the global
+ *  variable lynx_nsl_status, with one of the following values:
+ *	HT_INTERRUPTED		Interrupted by user
+ *	HT_NOT_ACCEPTABLE	Hostname detected as invalid
+ *				(also sets h_errno)
+ *	HT_H_ERRNO_VALID	An error occurred, and h_errno holds
+ *				an appropriate value
+ *	HT_ERROR		Resolver error, reason not known
+ *	HT_INTERNAL		Internal error
+ */
+static LYNX_HOSTENT *LYGetHostByName(char *host)
+{
+    static const char *this_func = "LYGetHostByName";
+
+#ifdef NSL_FORK
+    /* for transfer of result between from child to parent: */
+    LYNX_HOSTENT *rehostent = 0;
+#endif /* NSL_FORK */
+
+    LYNX_HOSTENT *result_phost = NULL;
+
+#ifdef __DJGPP__
+    _resolve_hook = ResolveYield;
+#endif
+
+    if (!host) {
+	CTRACE((tfp, "%s: Can't parse `NULL'.\n", this_func));
+	lynx_nsl_status = HT_INTERNAL;
+	return NULL;
+    }
+    CTRACE((tfp, "%s: parsing `%s'.\n", this_func, host));
+
+    /*  Could disable this if all our callers already check - kw */
+    if (HTCheckForInterrupt()) {
+	CTRACE((tfp, "%s: INTERRUPTED for '%s'.\n", this_func, host));
+	lynx_nsl_status = HT_INTERRUPTED;
+	return NULL;
+    }
+
+    if (!valid_hostname(host)) {
+	lynx_nsl_status = HT_NOT_ACCEPTABLE;
+#ifdef NO_RECOVERY
+#ifdef _WINDOWS
+	WSASetLastError(NO_RECOVERY);
+#else
+	h_errno = NO_RECOVERY;
+#endif
+#endif
+	return NULL;
+    }
+#ifdef MVS			/* Outstanding problem with crash in MVS gethostbyname */
+    CTRACE((tfp, "%s: Calling gethostbyname(%s)\n", this_func, host));
+#endif /* MVS */
+
+    CTRACE_FLUSH(tfp);		/* so child messages will not mess up parent log */
+
+    lynx_nsl_status = HT_INTERNAL;	/* should be set to something else below */
+
+#ifdef NSL_FORK
+    if (!setup_nsl_fork(really_gethostbyname,
+			read_hostent,
+			dump_hostent,
+			host, NULL, (void **) &rehostent)) {
+	goto failed;
+    }
+    result_phost = rehostent;
+#else /* Not NSL_FORK: */
+
+#ifdef _WINDOWS_NSL
+    {
+	HANDLE hThread;
+	DWORD dwThreadID;
+
+#ifndef __CYGWIN__
+	if (!system_is_NT) {	/* for Windows9x */
+	    unsigned long t;
+
+	    t = (unsigned long) inet_addr(host);
+	    if (t != INADDR_NONE)
+		gbl_phost = gethostbyaddr((char *) &t, sizeof(t), AF_INET);
+	    else
+		gbl_phost = gethostbyname(host);
+	} else {		/* for Windows NT */
+#endif /* !__CYGWIN__ */
+	    gbl_phost = (LYNX_HOSTENT *) NULL;
+	    donelookup = FALSE;
+
+#if defined(__CYGWIN__) || defined(USE_WINSOCK2_H)
+	    SetLastError(WSAHOST_NOT_FOUND);
+#else
+	    WSASetLastError(WSAHOST_NOT_FOUND);
+#endif
+
+	    hThread = CreateThread(NULL, 4096UL, _fork_func, host, 0UL,
+				   &dwThreadID);
+	    if (!hThread)
+		MessageBox(NULL, "CreateThread",
+			   "CreateThread Failed", 0L);
+
+	    while (!donelookup) {
+		if (HTCheckForInterrupt()) {
+		    /* Note that host is a character array and is not freed */
+		    /* to avoid possible subthread problems: */
+		    if (!CloseHandle(hThread)) {
+			MessageBox((void *) NULL,
+				   "CloseHandle", "CloseHandle Failed", 0L);
+		    }
+		    lynx_nsl_status = HT_INTERRUPTED;
+		    return NULL;
+		}
+	    }
+#ifndef __CYGWIN__
+	}
+#endif /* !__CYGWIN__ */
+	if (gbl_phost) {
+	    lynx_nsl_status = HT_OK;
+	    result_phost = gbl_phost;
+	} else {
+	    lynx_nsl_status = HT_ERROR;
+	    goto failed;
+	}
+    }
+
+#else /* !NSL_FORK, !_WINDOWS_NSL: */
+    {
+	LYNX_HOSTENT *phost;
+
+	phost = gethostbyname(host);	/* See netdb.h */
+#ifdef MVS
+	CTRACE((tfp, "%s: gethostbyname() returned %d\n", this_func, phost));
+#endif /* MVS */
+	if (phost) {
+	    lynx_nsl_status = HT_OK;
+	    result_phost = phost;
+	} else {
+	    lynx_nsl_status = HT_H_ERRNO_VALID;
+	    goto failed;
+	}
+    }
+#endif /* !NSL_FORK, !_WINDOWS_NSL */
+#endif /* !NSL_FORK */
+
+#ifdef DEBUG_HOSTENT
+    dump_hostent(this_func, result_phost);
+    CTRACE((tfp, "%s: Resolved name to a hostent.\n", this_func));
+#endif
+
+    return result_phost;	/* OK */
+
+  failed:
+    CTRACE((tfp, "%s: Can't find internet node name `%s'.\n", this_func, host));
+    return NULL;
+}
+
+BOOLEAN LYCheckHostByName(char *host)
+{
+    LYNX_HOSTENT *data = LYGetHostByName(host);
+    BOOLEAN result = (data != NULL);
+
+    FREE_NSL_FORK(data);
+    return result;
+}
+
+/*	Parse a network node address and port
+ *	-------------------------------------
+ *
+ *  On entry,
+ *	str	points to a string with a node name or number,
+ *		with optional trailing colon and port number.
+ *	soc_in	points to the binary internet or decnet address field.
+ *
+ *  On exit,
+ *	*soc_in is filled in.  If no port is specified in str, that
+ *		field is left unchanged in *soc_in.
+ */
+#ifndef INET6
+static int HTParseInet(SockA *soc_in, const char *str)
+{
+    static const char *this_func = "HTParseInet";
+
+    char *port;
+    int dotcount_ip = 0;	/* for dotted decimal IP addr */
+    char *strptr;
+    char *host = NULL;
+
+    if (!str) {
+	CTRACE((tfp, "%s: Can't parse `NULL'.\n", this_func));
+	return -1;
+    }
+    CTRACE((tfp, "%s: parsing `%s'.\n", this_func, str));
+    if (HTCheckForInterrupt()) {
+	CTRACE((tfp, "%s: INTERRUPTED for '%s'.\n", this_func, str));
+	return -1;
+    }
+    StrAllocCopy(host, str);	/* Make a copy we can mutilate */
+    /*
+     * Parse port number if present.
+     */
+    if ((port = StrChr(host, ':')) != NULL) {
+	*port++ = 0;		/* Chop off port */
+	strptr = port;
+	if (port[0] >= '0' && port[0] <= '9') {
+#ifdef UNIX
+	    soc_in->sin_port = (PortNumber) htons(strtol(port, &strptr, 10));
+#else /* VMS: */
+#ifdef DECNET
+	    soc_in->sdn_objnum = (unsigned char) (strtol(port, &strptr, 10));
+#else
+	    soc_in->sin_port = htons((PortNumber) strtol(port, &strptr, 10));
+#endif /* Decnet */
+#endif /* Unix vs. VMS */
+#ifdef SUPPRESS			/* 1. crashes!?!.  2. URL syntax has number not name */
+	} else {
+	    struct servent *serv = getservbyname(port, (char *) 0);
+
+	    if (serv) {
+		soc_in->sin_port = serv->s_port;
+	    } else {
+		CTRACE((tfp, "TCP: Unknown service %s\n", port));
+	    }
+#endif /* SUPPRESS */
+	}
+	if (strptr && *strptr != '\0') {
+	    FREE(host);
+	    HTAlwaysAlert(NULL, gettext("Address has invalid port"));
+	    return -1;
+	}
+    }
+#ifdef DECNET
+    /*
+     * Read Decnet node name.  @@ Should know about DECnet addresses, but it's
+     * probably worth waiting until the Phase transition from IV to V.
+     */
+    soc_in->sdn_nam.n_len = min(DN_MAXNAML, strlen(host));	/* <=6 in phase 4 */
+    StrNCpy(soc_in->sdn_nam.n_name, host, soc_in->sdn_nam.n_len + 1);
+    CTRACE((tfp,
+	    "DECnet: Parsed address as object number %d on host %.6s...\n",
+	    soc_in->sdn_objnum, host));
+#else /* parse Internet host: */
+
+    if (*host >= '0' && *host <= '9') {		/* Test for numeric node address: */
+	strptr = host;
+	while (*strptr) {
+	    if (*strptr == '.') {
+		dotcount_ip++;
+	    } else if (!isdigit(UCH(*strptr))) {
+		break;
+	    }
+	    strptr++;
+	}
+	if (*strptr) {		/* found non-numeric, assume domain name */
+	    dotcount_ip = 0;
+	}
+    }
+
+    /*
+     * Parse host number if present.
+     */
+    if (dotcount_ip == 3)	/* Numeric node address: */
+    {
+#ifdef GUSI
+	soc_in->sin_addr = inet_addr(host);	/* See netinet/in.h */
+#else
+#ifdef HAVE_INET_ATON
+	if (!inet_aton(host, &(soc_in->sin_addr))) {
+	    CTRACE((tfp, "inet_aton(%s) returns error\n", host));
+	    FREE(host);
+	    return -1;
+	}
+#else
+	soc_in->sin_addr.s_addr = inet_addr(host);	/* See arpa/inet.h */
+#endif /* HAVE_INET_ATON */
+#endif /* GUSI */
+	FREE(host);
+    } else {			/* Alphanumeric node name: */
+
+#ifdef MVS			/* Outstanding problem with crash in MVS gethostbyname */
+	CTRACE((tfp, "%s: Calling LYGetHostByName(%s)\n", this_func, host));
+#endif /* MVS */
+
+#ifdef _WINDOWS_NSL
+	gbl_phost = LYGetHostByName(host);	/* See above */
+	if (!gbl_phost)
+	    goto failed;
+	MemCpy((void *) &soc_in->sin_addr, gbl_phost->h_addr_list[0], gbl_phost->h_length);
+	FREE(gbl_phost);
+#else /* !_WINDOWS_NSL */
+	{
+	    LYNX_HOSTENT *phost;
+
+	    phost = LYGetHostByName(host);	/* See above */
+
+	    if (!phost)
+		goto failed;
+	    if (phost->h_length != sizeof soc_in->sin_addr) {
+		HTAlwaysAlert(host, gettext("Address length looks invalid"));
+	    }
+	    MemCpy((void *) &soc_in->sin_addr, phost->h_addr_list[0], phost->h_length);
+	    FREE_NSL_FORK(phost);
+	}
+#endif /* _WINDOWS_NSL */
+
+	FREE(host);
+    }				/* Alphanumeric node name */
+
+    CTRACE((tfp,
+	    "%s: Parsed address as port %d, IP address %d.%d.%d.%d\n",
+	    this_func,
+	    (int) ntohs(soc_in->sin_port),
+	    (int) *((unsigned char *) (&soc_in->sin_addr) + 0),
+	    (int) *((unsigned char *) (&soc_in->sin_addr) + 1),
+	    (int) *((unsigned char *) (&soc_in->sin_addr) + 2),
+	    (int) *((unsigned char *) (&soc_in->sin_addr) + 3)));
+#endif /* Internet vs. Decnet */
+
+    return 0;			/* OK */
+
+  failed:
+    CTRACE((tfp, "%s: Can't find internet node name `%s'.\n",
+	    this_func, host));
+    FREE(host);
+    switch (lynx_nsl_status) {
+    case HT_NOT_ACCEPTABLE:
+    case HT_INTERRUPTED:
+	return lynx_nsl_status;
+    default:
+	return -1;
+    }
+}
+#endif /* !INET6 */
+
+#ifdef INET6
+
+static void dump_addrinfo(const char *tag, const void *data)
+{
+    const LYNX_ADDRINFO *res;
+    int count = 0;
+
+    CTRACE((tfp, "dump_addrinfo %s:\n", tag));
+    for (res = (const LYNX_ADDRINFO *) data; res; res = res->ai_next) {
+	char hostbuf[1024], portbuf[1024];
+
+	++count;
+	hostbuf[0] = '\0';
+	portbuf[0] = '\0';
+	getnameinfo(res->ai_addr, res->ai_addrlen,
+		    hostbuf, (socklen_t) sizeof(hostbuf),
+		    portbuf, (socklen_t) sizeof(portbuf),
+		    NI_NUMERICHOST | NI_NUMERICSERV);
+
+	CTRACE((tfp,
+		"\t[%d] family %d, socktype %d, protocol %d addr %s port %s\n",
+		count,
+		res->ai_family,
+		res->ai_socktype,
+		res->ai_protocol,
+		hostbuf,
+		portbuf));
+    }
+}
+
+#if defined(NSL_FORK)
+
+/*
+ * Copy the relevant information (on the child-side).
+ */
+static size_t fill_addrinfo(void **buffer,
+			    const LYNX_ADDRINFO *phost)
+{
+    static const char *this_func = "fill_addinfo";
+
+    const LYNX_ADDRINFO *q;
+    LYNX_ADDRINFO *actual;
+    LYNX_ADDRINFO *result;
+    int count = 0;
+    int limit = 0;
+    size_t need = sizeof(LYNX_ADDRINFO);
+    char *heap;
+
+    CTRACE((tfp, "filladdr_info %p\n", (const void *) phost));
+    for (q = phost; q != 0; q = q->ai_next) {
+	++limit;
+	need += phost->ai_addrlen;
+	need += sizeof(LYNX_ADDRINFO);
+    }
+    CTRACE((tfp, "...fill_addrinfo %d:%lu\n", limit, (unsigned long) need));
+
+    if ((result = (LYNX_ADDRINFO *) calloc(1, need)) == 0)
+	outofmem(__FILE__, this_func);
+
+    *buffer = actual = result;
+    heap = ((char *) actual) + ((size_t) limit * sizeof(LYNX_ADDRINFO));
+
+    for (count = 0; count < limit; ++count) {
+
+	/*
+	 * copying the whole structure seems simpler but because it is not
+	 * packed, uninitialized gaps make it hard to analyse with valgrind.
+	 */
+	/* *INDENT-EQLS* */
+	actual->ai_flags    = phost->ai_flags;
+	actual->ai_family   = phost->ai_family;
+	actual->ai_socktype = phost->ai_socktype;
+	actual->ai_protocol = phost->ai_protocol;
+	actual->ai_addrlen  = phost->ai_addrlen;
+	actual->ai_addr     = (struct sockaddr *) (void *) heap;
+
+	MemCpy(heap, phost->ai_addr, phost->ai_addrlen);
+	heap += phost->ai_addrlen;
+
+	phost = phost->ai_next;
+
+	actual->ai_next = ((count + 1 < limit)
+			   ? (actual + 1)
+			   : 0);
+	++actual;
+    }
+    return (size_t) (heap - (char *) result);
+}
+
+/*
+ * Read data, repair pointers as done in fill_addrinfo().
+ */
+static unsigned read_addrinfo(int fd, char *buffer, size_t length)
+{
+    unsigned result = read_bytes(fd, buffer, length);
+    LYNX_ADDRINFO *actual = (LYNX_ADDRINFO *) (void *) buffer;
+    LYNX_ADDRINFO *res;
+    int count = 0;
+    int limit;
+    char *heap;
+
+    CTRACE((tfp, "read_addrinfo length %lu\n", (unsigned long) length));
+    for (limit = 0; actual[limit].ai_next; ++limit) {
+    }
+    ++limit;
+    heap = (char *) (actual + limit);
+    CTRACE((tfp, "...read_addrinfo %d items\n", limit));
+
+    for (res = actual, count = 0; count < limit; ++count) {
+	res->ai_addr = (struct sockaddr *) (void *) heap;
+	heap += res->ai_addrlen;
+	if (count < limit - 1) {
+	    res->ai_next = (res + 1);
+	    ++res;
+	} else {
+	    res->ai_next = 0;
+	}
+    }
+
+#ifdef DEBUG_HOSTENT
+    dump_addrinfo("read_addrinfo", buffer);
+#endif
+    return result;
+}
+
+/*
+ * This is called via the child-side of the fork.
+ */
+static void really_getaddrinfo(const char *host,
+			       const char *port,
+			       STATUSES * statuses,
+			       void **result)
+{
+    LYNX_ADDRINFO hints, *res = 0;
+    int error;
+
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = PF_UNSPEC;
+    hints.ai_socktype = SOCK_STREAM;
+    error = getaddrinfo(host, port, &hints, &res);
+    if (error) {
+	CTRACE((tfp, "HTGetAddrInfo: getaddrinfo(%s, %s): %s\n", host, port,
+		gai_strerror(error)));
+    } else {
+	statuses->child_errno = errno;
+	statuses->child_h_errno = h_errno;
+#ifdef HAVE_H_ERRNO
+	statuses->h_errno_valid = YES;
+#endif
+
+#ifdef DEBUG_HOSTENT_CHILD
+	dump_addrinfo("CHILD getaddrinfo", res);
+#endif
+	statuses->rehostentlen = fill_addrinfo(result, res);
+#ifdef DEBUG_HOSTENT_CHILD
+	dump_addrinfo("CHILD fill_addrinfo", (const LYNX_ADDRINFO *) (*result));
+#endif
+	if (statuses->rehostentlen <= sizeof(LYNX_ADDRINFO) || (*result) == NULL) {
+	    statuses->rehostentlen = 0;
+	    statuses->h_length = 0;
+	} else {
+	    statuses->h_length = (int) (((LYNX_ADDRINFO *) (*result))->ai_addrlen);
+	}
+	freeaddrinfo(res);
+    }
+}
+#endif /* NSL_FORK */
+
+static LYNX_ADDRINFO *HTGetAddrInfo(const char *str,
+				    const int defport)
+{
+#ifdef NSL_FORK
+    /* for transfer of result between from child to parent: */
+    void *readdrinfo = 0;
+
+#else
+    LYNX_ADDRINFO hints;
+    int error;
+#endif /* NSL_FORK */
+    LYNX_ADDRINFO *res;
+    char *p;
+    char *s = NULL;
+    char *host, *port;
+    char pbuf[80];
+
+    StrAllocCopy(s, str);
+
+    if (s[0] == '[' && (p = StrChr(s, ']')) != NULL) {
+	*p++ = '\0';
+	host = s + 1;
+    } else {
+	p = s;
+	host = &s[0];
+    }
+    port = strrchr(p, ':');
+    if (port) {
+	*port++ = '\0';
+    } else {
+	sprintf(pbuf, "%d", defport);
+	port = pbuf;
+    }
+
+#ifdef NSL_FORK
+    if (setup_nsl_fork(really_getaddrinfo,
+		       read_addrinfo,
+		       dump_addrinfo,
+		       host, port, &readdrinfo)) {
+	res = readdrinfo;
+    } else {
+	res = NULL;
+    }
+#else
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = PF_UNSPEC;
+    hints.ai_socktype = SOCK_STREAM;
+    error = getaddrinfo(host, port, &hints, &res);
+    if (error || !res) {
+	CTRACE((tfp, "HTGetAddrInfo: getaddrinfo(%s, %s): %s\n", host, port,
+		gai_strerror(error)));
+	res = NULL;
+    }
+#endif
+
+    free(s);
+#ifdef DEBUG_HOSTENT
+    dump_addrinfo("HTGetAddrInfo", res);
+#endif
+    return res;
+}
+
+BOOLEAN HTCheckAddrInfo(const char *str, const int defport)
+{
+    LYNX_ADDRINFO *data = HTGetAddrInfo(str, defport);
+    BOOLEAN result = (data != 0);
+
+    FREE_NSL_FORK(data);
+    return result;
+}
+#endif /* INET6 */
+
+#ifdef LY_FIND_LEAKS
+/*	Free our name for the host on which we are - FM
+ *	-------------------------------------------
+ *
+ */
+static void free_HTTCP_hostname(void)
+{
+    FREE(hostname);
+}
+#endif /* LY_FIND_LEAKS */
+
+/*	Derive the name of the host on which we are
+ *	-------------------------------------------
+ *
+ */
+static void get_host_details(void)
+{
+    char name[MAXHOSTNAMELEN + 1];	/* The name of this host */
+
+#ifdef UCX
+    char *domain_name;		/* The name of this host domain */
+#endif /* UCX */
+#ifdef NEED_HOST_ADDRESS	/* no -- needs name server! */
+#ifdef INET6
+    LYNX_ADDRINFO hints, *res;
+    int error;
+
+#else
+    LYNX_HOSTENT *phost;	/* Pointer to host -- See netdb.h */
+#endif /* INET6 */
+#endif /* NEED_HOST_ADDRESS */
+    size_t namelength = sizeof(name);
+
+    if (hostname)
+	return;			/* Already done */
+    gethostname(name, namelength);	/* Without domain */
+    StrAllocCopy(hostname, name);
+#ifdef LY_FIND_LEAKS
+    atexit(free_HTTCP_hostname);
+#endif
+#ifdef UCX
+    /*
+     * UCX doesn't give the complete domain name.  Get rest from UCX$BIND_DOM
+     * logical.
+     */
+    if (StrChr(hostname, '.') == NULL) {	/* Not full address */
+	domain_name = LYGetEnv("UCX$BIND_DOMAIN");
+	if (domain_name == NULL)
+	    domain_name = LYGetEnv("TCPIP$BIND_DOMAIN");
+	if (domain_name != NULL) {
+	    StrAllocCat(hostname, ".");
+	    StrAllocCat(hostname, domain_name);
+	}
+    }
+#endif /* UCX */
+    CTRACE((tfp, "TCP: Local host name is %s\n", hostname));
+
+#ifndef DECNET			/* Decnet ain't got no damn name server 8#OO */
+#ifdef NEED_HOST_ADDRESS	/* no -- needs name server! */
+#ifdef INET6
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = PF_UNSPEC;
+    hints.ai_socktype = SOCK_STREAM;
+    hints.ai_flags = AI_CANONNAME;
+    error = getaddrinfo(name, NULL, &hints, &res);
+    if (error || !res || !res->ai_canonname) {
+	CTRACE((tfp, "TCP: %s: `%s'\n", gai_strerror(error), name));
+	if (res)
+	    freeaddrinfo(res);
+	return;			/* Fail! */
+    }
+    StrAllocCopy(hostname, res->ai_canonname);
+    MemCpy(&HTHostAddress, res->ai_addr, res->ai_addrlen);
+    freeaddrinfo(res);
+#else
+    phost = gethostbyname(name);	/* See netdb.h */
+    if (!OK_HOST(phost)) {
+	CTRACE((tfp,
+		"TCP: Can't find my own internet node address for `%s'!!\n",
+		name));
+	return;			/* Fail! */
+    }
+    StrAllocCopy(hostname, phost->h_name);
+    MemCpy(&HTHostAddress, &phost->h_addr_list[0], phost->h_length);
+#endif /* INET6 */
+    CTRACE((tfp, "     Name server says that I am `%s' = %s\n",
+	    hostname, HTInetString(&HTHostAddress)));
+#endif /* NEED_HOST_ADDRESS */
+
+#endif /* !DECNET */
+}
+
+const char *HTHostName(void)
+{
+    get_host_details();
+    return hostname;
+}
+
+#ifdef _WINDOWS
+#define SET_EINTR WSASetLastError(EINTR)
+#else
+#define SET_EINTR SOCKET_ERRNO = EINTR
+#endif
+
+static BOOL HTWasInterrupted(int *status)
+{
+    BOOL result = FALSE;
+
+    if (HTCheckForInterrupt()) {
+	result = TRUE;
+	*status = HT_INTERRUPTED;
+	SET_EINTR;
+    }
+    return result;
+}
+
+#define TRIES_PER_SECOND 10
+
+/*
+ * Set the select-timeout to 0.1 seconds.
+ */
+static void set_timeout(struct timeval *timeoutp)
+{
+    timeoutp->tv_sec = 0;
+    timeoutp->tv_usec = 100000;
+}
+
+#ifndef MULTINET		/* SOCKET_ERRNO != errno ? */
+#if !defined(UCX) || !defined(VAXC)	/* errno not modifiable ? */
+#define SOCKET_DEBUG_TRACE	/* show errno status after some system calls */
+#endif /* UCX && VAXC */
+#endif /* MULTINET */
+/*
+ *  Interruptible connect as implemented for Mosaic by Marc Andreesen
+ *  and hacked in for Lynx years ago by Lou Montulli, and further
+ *  modified over the years by numerous Lynx lovers. - FM
+ */
+int HTDoConnect(const char *url,
+		const char *protocol,
+		int default_port,
+		int *s)
+{
+    char *socks5_host = NULL;
+    unsigned socks5_host_len = 0;
+    int socks5_port;
+    const char *socks5_orig_url;
+    char *socks5_new_url = NULL;
+    char *socks5_protocol = NULL;
+    int status = HT_OK;
+    char *line = NULL;
+    char *p1 = NULL;
+    char *host = NULL;
+    char const *emsg;
+
+#ifdef INET6
+    LYNX_ADDRINFO *res = 0, *res0 = 0;
+
+#else
+    struct sockaddr_in sock_A;
+    struct sockaddr_in *soc_in = &sock_A;
+#endif
+
+    *s = -1;			/* nothing is open yet */
+
+    /* In case of a present SOCKS5 proxy, marshal */
+    if (socks5_proxy == NULL)
+	socks5_proxy = LYGetEnv("SOCKS5_PROXY");
+    if ((socks5_orig_url = socks5_proxy) != NULL) {
+	int xport;
+
+	xport = default_port;
+	socks5_orig_url = url;
+	StrAllocCopy(socks5_new_url, url);
+
+	/* Get node name and optional port number of wanted URL */
+	if ((p1 = HTParse(socks5_new_url, "", PARSE_HOST)) != NULL) {
+	    StrAllocCopy(socks5_host, p1);
+	    strip_userid(socks5_host, FALSE);
+	    FREE(p1);
+	}
+
+	if (isEmpty(socks5_host)) {
+	    emsg = gettext("SOCKS5: no hostname found.");
+	    status = HT_ERROR;
+	    goto report_error;
+	}
+
+	if (strlen(socks5_host) > 255) {
+	    emsg = gettext("SOCKS5: hostname too long.");
+	    status = HT_ERROR;
+	    goto report_error;
+	}
+	socks5_host_len = (unsigned) strlen(socks5_host);
+
+	if (HTParsePort(socks5_new_url, &socks5_port) == NULL)
+	    socks5_port = xport;
+	FREE(socks5_new_url);
+
+	/* And switch over to our SOCKS5 config; in order to embed that into
+	 * lynx environment, prepend protocol prefix */
+	default_port = 1080;	/* RFC 1928 */
+	HTSACat(&socks5_new_url, "socks://");
+	HTSACat(&socks5_new_url, socks5_proxy);
+	url = socks5_new_url;
+
+	HTSprintf0(&socks5_protocol,
+		   gettext("(for %s at %s) SOCKS5"),
+		   protocol, socks5_host);
+	protocol = socks5_protocol;
+    }
+#ifndef INET6
+    /*
+     * Set up defaults.
+     */
+    memset(soc_in, 0, sizeof(*soc_in));
+    soc_in->sin_family = AF_INET;
+    soc_in->sin_port = htons((PortNumber) default_port);
+#endif /* INET6 */
+
+    /*
+     * Get node name and optional port number.
+     */
+    p1 = HTParse(url, "", PARSE_HOST);
+    StrAllocCopy(host, p1);
+    strip_userid(host, FALSE);
+    FREE(p1);
+
+    HTSprintf0(&line, "%s%s", WWW_FIND_MESSAGE, host);
+    _HTProgress(line);
+#ifdef INET6
+    /* HTParseInet() is useless! */
+    res0 = HTGetAddrInfo(host, default_port);
+    if (res0 == NULL) {
+	HTSprintf0(&line, gettext("Unable to locate remote host %s."), host);
+	_HTProgress(line);
+	status = HT_NO_DATA;
+	goto cleanup;
+    }
+#else
+    status = HTParseInet(soc_in, host);
+    if (status) {
+	if (status != HT_INTERRUPTED) {
+	    if (status == HT_NOT_ACCEPTABLE) {
+		/* Not HTProgress, so warning won't be overwritten immediately;
+		 * but not HTAlert, because typically there will be other
+		 * alerts from the callers.  - kw
+		 */
+		HTUserMsg2(gettext("Invalid hostname %s"), host);
+	    } else {
+		HTSprintf0(&line,
+			   gettext("Unable to locate remote host %s."), host);
+		_HTProgress(line);
+	    }
+	    status = HT_NO_DATA;
+	}
+	goto cleanup;
+    }
+#endif /* INET6 */
+
+    HTSprintf0(&line, gettext("Making %s connection to %s"), protocol, host);
+    _HTProgress(line);
+
+    /*
+     * Now, let's get a socket set up from the server for the data.
+     */
+#ifndef INET6
+    *s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+    if (*s == -1) {
+	status = HT_NO_DATA;
+	emsg = gettext("socket failed.");
+	goto report_error;
+    }
+#else
+    for (res = res0; res; res = res->ai_next) {
+	*s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+	if (*s == -1) {
+	    char hostbuf[1024], portbuf[1024];
+
+	    getnameinfo(res->ai_addr, res->ai_addrlen,
+			hostbuf, (socklen_t) sizeof(hostbuf),
+			portbuf, (socklen_t) sizeof(portbuf),
+			NI_NUMERICHOST | NI_NUMERICSERV);
+	    HTSprintf0(&line,
+		       gettext("socket failed: family %d addr %s port %s."),
+		       res->ai_family, hostbuf, portbuf);
+	    _HTProgress(line);
+	    continue;
+	}
+#endif /* INET6 */
+
+#if !defined(DOSPATH) || defined(__DJGPP__)
+#if !defined(NO_IOCTL) || defined(USE_FCNTL)
+	/*
+	 * Make the socket non-blocking, so the connect can be canceled.  This
+	 * means that when we issue the connect we should NOT have to wait for
+	 * the accept on the other end.
+	 */
+	{
+#ifdef USE_FCNTL
+	    int ret = fcntl(*s, F_SETFL, O_NONBLOCK);
+
+#else
+	    int val = 1;
+	    int ret = IOCTL(*s, FIONBIO, &val);
+#endif /* USE_FCNTL */
+	    if (ret == -1)
+		_HTProgress(gettext("Could not make connection non-blocking."));
+	}
+#endif /* !NO_IOCTL || USE_FCNTL */
+#endif /* !DOSPATH || __DJGPP__ */
+
+	/*
+	 * Issue the connect.  Since the server can't do an instantaneous
+	 * accept and we are non-blocking, this will almost certainly return a
+	 * negative status.
+	 */
+#ifdef SOCKS
+	if (socks_flag) {
+#ifdef INET6
+	    status = Rconnect(*s, res->ai_addr, res->ai_addrlen);
+#else
+	    status = Rconnect(*s, SOCKADDR_OF(sock_A), sizeof(sock_A));
+#endif /* INET6 */
+	} else
+#endif /* SOCKS */
+#ifdef INET6
+	    status = connect(*s, res->ai_addr, res->ai_addrlen);
+#else
+	    status = connect(*s, SOCKADDR_OF(sock_A), sizeof(sock_A));
+#endif /* INET6 */
+
+	/*
+	 * According to the Sun man page for connect:
+	 *  EINPROGRESS         The socket is non-blocking and the  con-
+	 *                      nection cannot be completed immediately.
+	 *                      It is possible to select(2) for  comple-
+	 *                      tion  by  selecting the socket for writ-
+	 *                      ing.
+	 * According to the Motorola SVR4 man page for connect:
+	 *  EAGAIN              The socket is non-blocking and the  con-
+	 *                      nection cannot be completed immediately.
+	 *                      It is possible to select for  completion
+	 *                      by  selecting  the  socket  for writing.
+	 *                      However, this is only  possible  if  the
+	 *                      socket  STREAMS  module  is  the topmost
+	 *                      module on  the  protocol  stack  with  a
+	 *                      write  service  procedure.  This will be
+	 *                      the normal case.
+	 */
+	CTRACE((tfp, "connect(): status: %d, SOCK_ERRNO: %d\n", status, SOCKET_ERRNO));
+
+	if ((status < 0) &&
+	    (SOCKET_ERRNO == EINPROGRESS
+#ifdef EAGAIN
+	     || SOCKET_ERRNO == EAGAIN
+#endif
+	    )) {
+	    struct timeval select_timeout;
+	    int ret;
+	    int tries = 0;
+
+#ifdef SOCKET_DEBUG_TRACE
+	    if (SOCKET_ERRNO != EINPROGRESS) {
+		HTInetStatus("this socket's first connect");
+	    }
+#endif /* SOCKET_DEBUG_TRACE */
+	    ret = 0;
+	    while (ret <= 0) {
+		fd_set writefds;
+
+		/*
+		 * Protect against an infinite loop.
+		 */
+		if ((tries++ / TRIES_PER_SECOND) >= connect_timeout) {
+		    HTAlert(gettext("Connection failed (too many retries)."));
+#ifdef INET6
+#ifndef NSL_FORK
+		    if (res0)
+			freeaddrinfo(res0);
+#endif
+#endif /* INET6 */
+		    status = HT_NO_DATA;
+		    goto cleanup;
+		}
+		set_timeout(&select_timeout);
+		FD_ZERO(&writefds);
+		FD_SET((LYNX_FD) *s, &writefds);
+#ifdef SOCKS
+		if (socks_flag)
+		    ret = Rselect(*s + 1, NULL,
+				  &writefds, NULL, &select_timeout);
+		else
+#endif /* SOCKS */
+		    ret = select(*s + 1,
+				 NULL,
+				 &writefds,
+				 NULL,
+				 &select_timeout);
+
+#ifdef SOCKET_DEBUG_TRACE
+		if (tries == 1) {
+		    if (SOCKET_ERRNO != EINPROGRESS) {
+			HTInetStatus("this socket's first select");
+		    }
+		}
+#endif /* SOCKET_DEBUG_TRACE */
+		/*
+		 * If we suspend, then it is possible that select will be
+		 * interrupted.  Allow for this possibility.  - JED
+		 */
+		if ((ret == -1) && (SOCKET_ERRNO == EINTR))
+		    continue;
+
+#ifdef SOCKET_DEBUG_TRACE
+		if (ret < 0) {
+		    HTInetStatus("failed select");
+		}
+#endif /* SOCKET_DEBUG_TRACE */
+		/*
+		 * Again according to the Sun and Motorola man pages for
+		 * connect:
+		 *  EALREADY    The socket is non-blocking and a  previ-
+		 *              ous  connection attempt has not yet been
+		 *              completed.
+		 * Thus if the SOCKET_ERRNO is NOT EALREADY we have a real
+		 * error, and should break out here and return that error.
+		 * Otherwise if it is EALREADY keep on trying to complete the
+		 * connection.
+		 */
+		if ((ret < 0) && (SOCKET_ERRNO != EALREADY)) {
+		    status = ret;
+		    break;
+		} else if (((SOCKET_ERRNO == EALREADY) ||
+			    (SOCKET_ERRNO == EINPROGRESS)) &&
+			   HTCheckForInterrupt()) {
+		    status = HT_INTERRUPTED;
+		    break;
+		} else if (ret > 0) {
+		    /*
+		     * Extra check here for connection success, if we try to
+		     * connect again, and get EISCONN, it means we have a
+		     * successful connection.  But don't check with SOCKS.
+		     */
+#ifdef SOCKS
+		    if (socks_flag) {
+			status = 0;
+		    } else {
+#endif /* SOCKS */
+#ifdef INET6
+			status = connect(*s, res->ai_addr, res->ai_addrlen);
+#else
+			status = connect(*s, SOCKADDR_OF(sock_A), sizeof(sock_A));
+#endif /* INET6 */
+#ifdef UCX
+			/*
+			 * A UCX feature:  Instead of returning EISCONN UCX
+			 * returns EADDRINUSE.  Test for this status also.
+			 */
+			if ((status < 0) && ((SOCKET_ERRNO == EISCONN) ||
+					     (SOCKET_ERRNO == EADDRINUSE)))
+#else
+			if ((status < 0) && (SOCKET_ERRNO == EISCONN))
+#endif /* UCX */
+			{
+			    status = 0;
+			}
+
+			if (status && (SOCKET_ERRNO == EALREADY))	/* new stuff LJM */
+			    ret = 0;	/* keep going */
+			else {
+#ifdef SOCKET_DEBUG_TRACE
+			    if (status < 0) {
+				HTInetStatus("confirm-ready connect");
+			    }
+#endif /* SOCKET_DEBUG_TRACE */
+			    break;
+			}
+#ifdef SOCKS
+		    }
+#endif /* SOCKS */
+		}
+#ifdef SOCKS
+		else if (!socks_flag)
+#else
+		else
+#endif /* SOCKS */
+		{
+		    /*
+		     * The select says we aren't ready yet.  Try to connect
+		     * again to make sure.  If we don't get EALREADY or
+		     * EISCONN, something has gone wrong.  Break out and report
+		     * it.
+		     *
+		     * For some reason, SVR4 returns EAGAIN here instead of
+		     * EALREADY, even though the man page says it should be
+		     * EALREADY.
+		     *
+		     * For some reason, UCX pre 3 apparently returns errno =
+		     * 18242 instead of EALREADY or EISCONN.
+		     */
+#ifdef INET6
+		    status = connect(*s, res->ai_addr, res->ai_addrlen);
+#else
+		    status = connect(*s, SOCKADDR_OF(sock_A), sizeof(sock_A));
+#endif /* INET6 */
+		    if ((status < 0) &&
+			(SOCKET_ERRNO != EALREADY
+#ifdef EAGAIN
+			 && SOCKET_ERRNO != EAGAIN
+#endif
+			) &&
+#ifdef UCX
+			(SOCKET_ERRNO != 18242) &&
+#endif /* UCX */
+			(SOCKET_ERRNO != EISCONN)) {
+#ifdef SOCKET_DEBUG_TRACE
+			HTInetStatus("confirm-not-ready connect");
+#endif /* SOCKET_DEBUG_TRACE */
+			break;
+		    }
+		}
+		if (HTWasInterrupted(&status)) {
+		    CTRACE((tfp, "*** INTERRUPTED in middle of connect.\n"));
+		    break;
+		}
+	    }
+	}
+#ifdef SOCKET_DEBUG_TRACE
+	else if (status < 0) {
+	    HTInetStatus("this socket's first and only connect");
+	}
+#endif /* SOCKET_DEBUG_TRACE */
+#ifdef INET6
+	if (status < 0) {
+	    NETCLOSE(*s);
+	    *s = -1;
+	    if (status != HT_INTERRUPTED)
+		continue;
+	}
+	break;
+    }
+#endif /* INET6 */
+
+#ifdef INET6
+    if (*s < 0)
+#else
+    if (status < 0)
+#endif /* INET6 */
+    {
+	/*
+	 * The connect attempt failed or was interrupted, so close up the
+	 * socket.
+	 */
+	NETCLOSE(*s);
+    }
+#if !defined(DOSPATH) || defined(__DJGPP__)
+#if !defined(NO_IOCTL) || defined(USE_FCNTL)
+    else {
+	/*
+	 * Make the socket blocking again on good connect.
+	 */
+#ifdef USE_FCNTL
+	int ret = fcntl(*s, F_SETFL, 0);
+
+#else
+	int val = 0;
+	int ret = IOCTL(*s, FIONBIO, &val);
+#endif /* USE_FCNTL */
+	if (ret == -1)
+	    _HTProgress(gettext("Could not restore socket to blocking."));
+    }
+#endif /* !NO_IOCTL || USE_FCNTL */
+#endif /* !DOSPATH || __DJGPP__ */
+
+#ifdef INET6
+#ifdef NSL_FORK
+    FREE_NSL_FORK(res0);
+#else
+    if (res0)
+	freeaddrinfo(res0);
+#endif
+#endif /* INET6 */
+
+    /* Now if this was a SOCKS5 proxy connection, go for the real one */
+    if (status >= 0 && socks5_orig_url != NULL) {
+	unsigned char pbuf[4 + 1 + 255 + 2];
+	unsigned i;
+
+	/* RFC 1928: version identifier/method selection message */
+	pbuf[0] = 0x05;		/* VER: protocol version: X'05' */
+	pbuf[1] = 0x01;		/* NMETHODS: 1 */
+	pbuf[2] = 0x00;		/* METHOD: X'00' NO AUTHENTICATION REQUIRED */
+	if (NETWRITE(*s, (char *) pbuf, 3) != 3) {
+	    goto report_system_err;
+	} else if (HTDoRead(*s, pbuf, 2) != 2) {
+	    goto report_system_err;
+	} else if (pbuf[0] != 0x05 || pbuf[1] != 0x00) {
+	    goto report_unexpected_reply;
+	}
+
+	/* RFC 1928: CONNECT request */
+	HTSprintf0(&line, gettext("SOCKS5: connecting to %s"), socks5_host);
+	_HTProgress(line);
+	pbuf[0] = 0x05;		/* VER: protocol version: X'05' */
+	pbuf[1] = 0x01;		/* CMD: CONNECT X'01' */
+	pbuf[2] = 0x00;		/* RESERVED */
+	pbuf[3] = 0x03;		/* ATYP: domain name */
+	pbuf[4] = (unsigned char) socks5_host_len;
+	memcpy(&pbuf[i = 5], socks5_host, socks5_host_len);
+	i += socks5_host_len;
+	/* C99 */  {
+	    unsigned short x;	/* XXX 16-bit? */
+
+	    x = htons((PortNumber) socks5_port);
+	    memcpy(&pbuf[i], (unsigned char *) &x, sizeof x);
+	    i += (unsigned) sizeof(x);
+	}
+	if ((size_t) NETWRITE(*s, (char *) pbuf, i) != i) {
+	    goto report_system_err;
+	} else if ((unsigned) HTDoRead(*s, pbuf, 4) != 4) {
+	    goto report_system_err;
+	}
+	/* Version 5, reserved must be 0 */
+	if (pbuf[0] == 0x05 && pbuf[2] == 0x00) {
+	    /* Result */
+	    switch (pbuf[1]) {
+	    case 0x00:
+		emsg = NULL;
+		break;
+	    case 0x01:
+		emsg = gettext("SOCKS server failure");
+		break;
+	    case 0x02:
+		emsg = gettext("connection not allowed by ruleset");
+		break;
+	    case 0x03:
+		emsg = gettext("network unreachable");
+		break;
+	    case 0x04:
+		emsg = gettext("host unreachable");
+		break;
+	    case 0x05:
+		emsg = gettext("connection refused");
+		break;
+	    case 0x06:
+		emsg = gettext("TTL expired");
+		break;
+	    case 0x07:
+		emsg = gettext("command not supported");
+		break;
+	    case 0x08:
+		emsg = gettext("address type not supported");
+		break;
+	    default:
+		emsg = gettext("unknown SOCKS error code");
+		break;
+	    }
+	    if (emsg != NULL) {
+		goto report_no_connection;
+	    }
+	} else {
+	    goto report_unexpected_reply;
+	}
+
+	/* Address type variable; read the BND.PORT with it.
+	 * This is actually false since RFC 1928 says that the BND.ADDR reply
+	 * to CONNECT contains the IP address, so only 0x01 and 0x04 are
+	 * allowed */
+	switch (pbuf[3]) {
+	case 0x01:
+	    i = 4;
+	    break;
+	case 0x03:
+	    i = 1;
+	    break;
+	case 0x04:
+	    i = 16;
+	    break;
+	default:
+	    goto report_unexpected_reply;
+	}
+	i += (unsigned) sizeof(unsigned short);
+
+	if ((size_t) HTDoRead(*s, pbuf, i) != i) {
+	    goto report_system_err;
+	} else if (i == 1 + sizeof(unsigned short)) {
+	    i = pbuf[0];
+	    if ((size_t) HTDoRead(*s, pbuf, i) != i) {
+		goto report_system_err;
+	    }
+	}
+    }
+    goto cleanup;
+
+  report_system_err:
+    emsg = LYStrerror(errno);
+    goto report_no_connection;
+
+  report_unexpected_reply:
+    emsg = gettext("unexpected reply\n");
+    /* FALLTHRU */
+
+  report_no_connection:
+    status = HT_NO_CONNECTION;
+    /* FALLTHRU */
+
+  report_error:
+    HTAlert(emsg);
+    if (*s != -1) {
+	NETCLOSE(*s);
+    }
+
+  cleanup:
+    if (socks5_proxy != NULL) {
+	FREE(socks5_new_url);
+	FREE(socks5_protocol);
+	FREE(socks5_host);
+    }
+    FREE(host);
+    FREE(line);
+    return status;
+}
+
+/*
+ *  This is interruptible so reads can be implemented cleanly.
+ */
+int HTDoRead(int fildes,
+	     void *buf,
+	     unsigned nbyte)
+{
+    int result;
+    BOOL ready;
+
+#if !defined(NO_IOCTL)
+    int ret;
+    fd_set readfds;
+    struct timeval select_timeout;
+    int tries = 0;
+
+#ifdef USE_READPROGRESS
+    int otries = 0;
+    time_t otime = time((time_t *) 0);
+    time_t start = otime;
+#endif
+#endif /* !NO_IOCTL */
+
+#if defined(UNIX) && !defined(__BEOS__)
+    if (fildes == 0) {
+	/*
+	 * 0 can be a valid socket fd, but if it's a tty something must have
+	 * gone wrong.  - kw
+	 */
+	if (isatty(fildes)) {
+	    CTRACE((tfp, "HTDoRead - refusing to read fd 0 which is a tty!\n"));
+	    return -1;
+	}
+    } else
+#endif
+    if (fildes <= 0) {
+	CTRACE((tfp, "HTDoRead - no file descriptor!\n"));
+	return -1;
+    }
+
+    if (HTWasInterrupted(&result)) {
+	CTRACE((tfp, "HTDoRead - interrupted before starting!\n"));
+	return (result);
+    }
+#if defined(NO_IOCTL)
+    ready = TRUE;
+#else
+    ready = FALSE;
+    while (!ready) {
+	/*
+	 * Protect against an infinite loop.
+	 */
+	if ((tries++ / TRIES_PER_SECOND) >= reading_timeout) {
+	    HTAlert(gettext("Socket read failed (too many tries)."));
+	    SET_EINTR;
+	    result = HT_INTERRUPTED;
+	    break;
+	}
+#ifdef USE_READPROGRESS
+	if (tries - otries > TRIES_PER_SECOND) {
+	    time_t t = time((time_t *) 0);
+
+	    otries = tries;
+	    if (t - otime >= 5) {
+		otime = t;
+		HTReadProgress((off_t) (-1), (off_t) 0);	/* Put "stalled" message */
+	    }
+	}
+#endif
+
+	/*
+	 * If we suspend, then it is possible that select will be interrupted.
+	 * Allow for this possibility.  - JED
+	 */
+	do {
+	    set_timeout(&select_timeout);
+	    FD_ZERO(&readfds);
+	    FD_SET((LYNX_FD) fildes, &readfds);
+#ifdef SOCKS
+	    if (socks_flag)
+		ret = Rselect(fildes + 1,
+			      &readfds, NULL, NULL, &select_timeout);
+	    else
+#endif /* SOCKS */
+		ret = select(fildes + 1,
+			     &readfds, NULL, NULL, &select_timeout);
+	} while ((ret == -1) && (errno == EINTR));
+
+	if (ret < 0) {
+	    result = -1;
+	    break;
+	} else if (ret > 0) {
+	    ready = TRUE;
+	} else if (HTWasInterrupted(&result)) {
+	    break;
+	}
+    }
+#endif /* !NO_IOCTL */
+
+    if (ready) {
+#if defined(UCX) && defined(VAXC)
+	/*
+	 * VAXC and UCX problem only.
+	 */
+	errno = vaxc$errno = 0;
+	result = SOCKET_READ(fildes, buf, nbyte);
+	CTRACE((tfp,
+		"Read - result,errno,vaxc$errno: %d %d %d\n", result, errno, vaxc$errno));
+	if ((result <= 0) && TRACE)
+	    perror("HTTCP.C:HTDoRead:read");	/* RJF */
+	/*
+	 * An errno value of EPIPE and result < 0 indicates end-of-file on VAXC.
+	 */
+	if ((result <= 0) && (errno == EPIPE)) {
+	    result = 0;
+	    set_errno(0);
+	}
+#else
+#ifdef UNIX
+	while ((result = (int) SOCKET_READ(fildes, buf, nbyte)) == -1) {
+	    if (errno == EINTR)
+		continue;
+#ifdef ERESTARTSYS
+	    if (errno == ERESTARTSYS)
+		continue;
+#endif /* ERESTARTSYS */
+	    HTInetStatus("read");
+	    break;
+	}
+#else /* UNIX */
+	result = NETREAD(fildes, (char *) buf, nbyte);
+#endif /* !UNIX */
+#endif /* UCX && VAXC */
+    }
+#ifdef USE_READPROGRESS
+    CTRACE2(TRACE_TIMING, (tfp, "...HTDoRead returns %d (%" PRI_time_t
+			   " seconds)\n",
+			   result, CAST_time_t (time((time_t *)0) - start)));
+#endif
+    return result;
+}
+
+#ifdef SVR4_BSDSELECT
+/*
+ *  This is a fix for the difference between BSD's select() and
+ *  SVR4's select().  SVR4's select() can never return a value larger
+ *  than the total number of file descriptors being checked.  So, if
+ *  you select for read and write on one file descriptor, and both
+ *  are true, SVR4 select() will only return 1.  BSD select in the
+ *  same situation will return 2.
+ *
+ *	Additionally, BSD select() on timing out, will zero the masks,
+ *	while SVR4 does not.  This is fixed here as well.
+ *
+ *	Set your tabstops to 4 characters to have this code nicely formatted.
+ *
+ *	Jerry Whelan, guru@bradley.edu, June 12th, 1993
+ */
+#ifdef select
+#undef select
+#endif /* select */
+
+#ifdef SOCKS
+#ifdef Rselect
+#undef Rselect
+#endif /* Rselect */
+#endif /* SOCKS */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/select.h>
+
+int BSDselect(int nfds,
+	      fd_set * readfds,
+	      fd_set * writefds,
+	      fd_set * exceptfds,
+	      struct timeval *select_timeout)
+{
+    int rval, i;
+
+#ifdef SOCKS
+    if (socks_flag)
+	rval = Rselect(nfds, readfds, writefds, exceptfds, select_timeout);
+    else
+#endif /* SOCKS */
+	rval = select(nfds, readfds, writefds, exceptfds, select_timeout);
+
+    switch (rval) {
+    case -1:
+	return (rval);
+
+    case 0:
+	if (readfds != NULL)
+	    FD_ZERO(readfds);
+	if (writefds != NULL)
+	    FD_ZERO(writefds);
+	if (exceptfds != NULL)
+	    FD_ZERO(exceptfds);
+	return (rval);
+
+    default:
+	for (i = 0, rval = 0; i < nfds; i++) {
+	    if ((readfds != NULL) && FD_ISSET(i, readfds))
+		rval++;
+	    if ((writefds != NULL) && FD_ISSET(i, writefds))
+		rval++;
+	    if ((exceptfds != NULL) && FD_ISSET(i, exceptfds))
+		rval++;
+
+	}
+	return (rval);
+    }
+/* Should never get here */
+}
+#endif /* SVR4_BSDSELECT */