diff --git a/CHANGES b/CHANGES
index 7d73860..80ab592 100644
--- a/CHANGES
+++ b/CHANGES
@@ -54,6 +54,9 @@ new features:
 	new address options ipv6-tclass and ipv6-unicast-hops set the related
 	socket options.
 
+	STREAMS (UNIX System V STREAMS) can be configured with the new address
+	options i-pop-all and i-push
+
 corrections:
 	some raw IP and UNIX datagram modes failed on BSD systems
 
diff --git a/Makefile.in b/Makefile.in
index d1c1483..fb6329e 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -51,7 +51,7 @@ XIOSRCS = xioinitialize.c xiohelp.c xioparam.c xiodiag.c xioopen.c xioopts.c \
 	xio-socks.c xio-proxy.c xio-udp.c \
 	xio-rawip.c \
 	xio-progcall.c xio-exec.c xio-system.c xio-termios.c xio-readline.c \
-	xio-pty.c xio-openssl.c \
+	xio-pty.c xio-openssl.c xio-streams.c\
 	xio-ascii.c xiolockfile.c xio-tcpwrap.c xio-ext2.c xio-tun.c
 XIOOBJS = $(XIOSRCS:.c=.o)
 UTLSRCS = error.c dalan.c procan.c procan-cdefs.c hostan.c fdname.c sysutils.c utils.c nestlex.c @FILAN@ @SYCLS@ @SSLCLS@
@@ -69,7 +69,7 @@ HFILES = sycls.h sslcls.h error.h dalan.h procan.h filan.h hostan.h sysincludes.
 	xio-ipapp.h xio-tcp.h xio-udp.h xio-sctp.h \
 	xio-socks.h xio-proxy.h xio-progcall.h xio-exec.h \
 	xio-system.h xio-termios.h xio-readline.h \
-	xio-pty.h xio-openssl.h \
+	xio-pty.h xio-openssl.h xio-streams.h \
 	xio-ascii.h xiolockfile.h xio-tcpwrap.h xio-ext2.h xio-tun.h
 
 
diff --git a/config.h.in b/config.h.in
index 2965536..ea26d95 100644
--- a/config.h.in
+++ b/config.h.in
@@ -490,6 +490,7 @@
 #undef WITH_PTY
 #undef WITH_EXT2
 #undef WITH_OPENSSL
+#define WITH_STREAMS 1
 #undef WITH_FIPS
 #undef OPENSSL_FIPS
 #undef WITH_LIBWRAP
diff --git a/doc/socat.yo b/doc/socat.yo
index 2153dc1..ef39d84 100644
--- a/doc/socat.yo
+++ b/doc/socat.yo
@@ -2512,6 +2512,13 @@ label(OPTION_VTDLY)dit(bf(tt(vtdly=<bool>)))
 label(OPTION_WERASE)dit(bf(tt(werase=<byte>)))
 label(OPTION_XCASE)dit(bf(tt(xcase=<bool>)))
 label(OPTION_XTABS)dit(bf(tt(xtabs)))
+label(OPTION_I_POP_ALL)dit(bf(tt(i-pop-all)))
+   With UNIX System V STREAMS, removes all drivers from the stack.
+label(OPTION_I_PUSH)dit(bf(tt(i-push=<string>)))
+   With UNIX System V STREAMS, pushes the driver (module) with the given name
+   (link(string)(TYPE_STRING)) onto the stack. For example, to make sure that a
+   character device on Solaris supports termios etc, use the following options:
+   tt(i-pop-all,i-push=ptem,i-push=ldterm,i-push=ttcompat)
 enddit()
 
 startdit()enddit()nl()
diff --git a/filan.c b/filan.c
index 0296074..246c9d3 100644
--- a/filan.c
+++ b/filan.c
@@ -26,7 +26,9 @@ struct sockopt {
    char *name;
 };
 
-/* dirty workaround so we dont get an error on AIX when getting linked with
+static int filan_streams_analyze(int fd, FILE *outfile);
+
+/* dirty workaround so we dont get an error on AIX when being linked with
    libwrap */
 int allow_severity, deny_severity;
 
@@ -353,6 +355,9 @@ int filan_stat(
 	   , outfile);
   }
 
+   /* ever heard of POSIX streams? here we handle these */
+   filan_streams_analyze(statfd, outfile);
+
    /* now see for type specific infos */
   if (statfd >= 0) { /*!indent */
    switch (buf->st_mode&S_IFMT) {
@@ -408,6 +413,48 @@ int devinfo(int fd) {
 #endif
 
 
+/* returns 0 on success (not a stream descriptor, or no module)
+   returns <0 on failure */
+static int filan_streams_analyze(int fd, FILE *outfile) {
+#ifdef I_LIST
+#  define SL_NMODS 8	/* max number of module names we can store */
+   struct str_list modnames;
+   int i;
+
+   if (!isastream(fd)) {
+      fprintf(outfile, "\t(no STREAMS modules)");
+      return 0;
+   }
+#if 0	/* uncomment for debugging */
+   fprintf(outfile, "\tfind=%d", ioctl(fd, I_FIND, "ldterm"));
+#endif
+   modnames.sl_nmods = ioctl(fd, I_LIST, 0);
+   if (modnames.sl_nmods < 0) {
+      fprintf(stderr, "ioctl(%d, I_LIST, 0): %s\n", fd, strerror(errno));
+      return -1;
+   }
+   modnames.sl_modlist = Malloc(modnames.sl_nmods*(sizeof(struct str_mlist)));
+   if (modnames.sl_modlist == NULL) {
+      fprintf(stderr, "out of memory\n");
+      return -1;
+   }
+   if (ioctl(fd, I_LIST, &modnames) < 0) {
+      fprintf(stderr, "ioctl(%d, I_LIST, %p): %s\n",
+	      fd, &modnames, strerror(errno));
+      free(modnames.sl_modlist);
+      return -1;
+   }
+   fprintf(outfile, "\tSTREAMS: ");
+   for (i = 0; i < modnames.sl_nmods; ++i) {
+      fprintf(outfile, "\"%s\"", modnames.sl_modlist[i].l_name);
+      if (i+1 < modnames.sl_nmods)  fputc(',', outfile);
+   }
+   free(modnames.sl_modlist);
+#endif /* defined(I_LIST) */
+   return 0;
+}
+
+
 /* character device analysis */
 int cdevan(int fd, FILE *outfile) {
    int ret;
diff --git a/xio-fd.c b/xio-fd.c
index 9fc1d57..53d6415 100644
--- a/xio-fd.c
+++ b/xio-fd.c
@@ -82,3 +82,8 @@ const struct optdesc opt_ioctl_int    = { "ioctl-int",   NULL,       OPT_IOCTL_I
 const struct optdesc opt_ioctl_intp   = { "ioctl-intp",  NULL,       OPT_IOCTL_INTP,  GROUP_FD, PH_FD, TYPE_INT_INTP,  OFUNC_IOCTL_GENERIC, 0, 0, 0 };
 const struct optdesc opt_ioctl_bin    = { "ioctl-bin",   NULL,       OPT_IOCTL_BIN,   GROUP_FD, PH_FD, TYPE_INT_BIN,   OFUNC_IOCTL_GENERIC, 0, 0, 0 };
 const struct optdesc opt_ioctl_string = { "ioctl-string",NULL,       OPT_IOCTL_STRING,GROUP_FD, PH_FD, TYPE_INT_STRING,OFUNC_IOCTL_GENERIC, 0, 0, 0 };
+
+/* POSIX STREAMS */
+#define ENABLE_OPTIONS
+#include "xio-streams.c"
+#undef ENABLE_OPTIONS
diff --git a/xio-fd.h b/xio-fd.h
index a301b4e..d664212 100644
--- a/xio-fd.h
+++ b/xio-fd.h
@@ -42,5 +42,6 @@ extern const struct optdesc opt_f_setlk_wr;
 extern const struct optdesc opt_f_setlkw_wr;
 extern const struct optdesc opt_cool_write;
 extern const struct optdesc opt_end_close;
+extern const struct optdesc opt_streams_i_push;
 
 #endif /* !defined(__xio_fd_h_included) */
diff --git a/xio-streams.c b/xio-streams.c
new file mode 100644
index 0000000..910b53e
--- /dev/null
+++ b/xio-streams.c
@@ -0,0 +1,79 @@
+/* source: xio-streams.c */
+/* Copyright Gerhard Rieger 2008 */
+/* Published under the GNU General Public License V.2, see file COPYING */
+
+/* this file contains definitions and functions for handling POSIX STREAMS */
+
+/* with this source file a new experimental approach is being introduced:
+   normally when adding a new option at least four existing files have to be
+   adapted; this is similar for new address types.
+
+   in the future i would like to have a more automatic assembling of socat from
+   topic oriented source files. this should make integration and control of
+   contributions more easy.
+
+   all code of a new topic - address and option definitions, open code, option
+   handing code, ev.parser code, etc. should go into one source file. the
+   selection of the desired code parts during the compilation is done by
+   setting cpp defines.
+
+   in the same was all public declarations should go in one header (.h) file.
+*/
+
+/* do not compile this file directly but include it from other .c files. with
+   CPP defines you select one part you want to really get included:
+
+   ENABLE_OPTIONS: activate the definition of the address option records
+   ENABLE_APPLYOPTS: C code that applies the address option passed in opt
+*/
+
+#ifdef ENABLE_OPTIONS
+
+#ifdef I_POP
+const struct optdesc opt_streams_i_pop_all = { "streams-i-pop-all", "pop-all", OPT_STREAMS_I_POP_ALL, GROUP_FD, PH_FD, TYPE_BOOL,   OFUNC_STREAMS_I_POP_ALL, 0, 0 };
+#endif
+#ifdef I_PUSH
+const struct optdesc opt_streams_i_push    = { "streams-i-push",    "push",    OPT_STREAMS_I_PUSH,    GROUP_FD, PH_FD, TYPE_STRING, OFUNC_STREAMS_I_PUSH,    0, 0 };
+#endif
+
+#elif defined(ENABLE_APPLYOPT)
+
+#if 0
+void dummy(void) {
+   if (0) { { ;
+#endif
+#ifdef I_POP
+      } else if (opt->desc->func == OFUNC_STREAMS_I_POP_ALL) {
+	 while (Ioctl(fd, I_POP, 0) >= 0) {
+	    Warn2("ioctl(%d, I_POP, 0): %s", fd, strerror(errno));
+	 }
+#endif
+#ifdef I_PUSH
+      } else if (opt->desc->func == OFUNC_STREAMS_I_PUSH) {
+	 if (Ioctl(fd, I_PUSH, opt->value.u_string) < 0) {
+	    Warn3("ioctl(%d, I_PUSH, \"%s\"): %s",
+		  fd, opt->value.u_string, strerror(errno));
+	    opt->desc = ODESC_ERROR; ++opt; continue;
+	 }
+#endif
+#if 0
+} } }
+#endif
+
+#else /* !defined(ENABLE_APPLYOPT) */
+
+#include "xiosysincludes.h"
+#if WITH_STREAMS        /* make this address configure dependend */
+#include "xioopen.h"
+
+#include "xio-fd.h"
+#include "xio-socket.h" /* _xioopen_connect() */
+#include "xio-listen.h"
+#include "xio-ipapp.h"
+#include "xio-openssl.h"
+
+
+
+#endif /* WITH_STREAMS */
+
+#endif /* !defined(ENABLE_OPTIONS) */
diff --git a/xio-streams.h b/xio-streams.h
new file mode 100644
index 0000000..bc1bdbe
--- /dev/null
+++ b/xio-streams.h
@@ -0,0 +1,40 @@
+/* source: xio-streams.h */
+/* Copyright Gerhard Rieger 2008 */
+/* Published under the GNU General Public License V.2, see file COPYING */
+
+/* when including this file select one part that you need by defining the
+   appropriate CPP define: 
+
+   (none): standard define, variable, and function declarations
+   ENABLE_OPTCODE: option codes for use in enum e_optcode
+   ENABLE_OFUNC: option functions for use in enum e_func
+*/
+
+#ifdef ENABLE_OPTCODE
+
+#if 0
+enum {	/* make syntax feature of editors cooperative */
+#endif
+   OPT_STREAMS_I_POP_ALL,	/* with POSIX STREAMS */
+   OPT_STREAMS_I_PUSH,	/* with POSIX STREAMS */
+#if 0
+} ;
+#endif
+
+#elif defined(ENABLE_OFUNC)
+
+#if 0
+enum {	/* make syntax feature of editors cooperative */
+#endif
+   OFUNC_STREAMS_I_POP_ALL,
+   OFUNC_STREAMS_I_PUSH,
+#if 0
+} ;
+#endif
+
+#else	/* normal declarations */
+
+extern const struct optdesc opt_streams_i_pop_all;
+extern const struct optdesc opt_streams_i_push;
+
+#endif
diff --git a/xiomodes.h b/xiomodes.h
index 999c4d4..602eab0 100644
--- a/xiomodes.h
+++ b/xiomodes.h
@@ -43,5 +43,6 @@
 #include "xio-tcpwrap.h"
 #include "xio-ext2.h"
 #include "xio-tun.h"
+#include "xio-streams.h"
 
 #endif /* !defined(__xiomodes_h_included) */
diff --git a/xioopts.c b/xioopts.c
index 9d9e88d..ab6de76 100644
--- a/xioopts.c
+++ b/xioopts.c
@@ -551,6 +551,12 @@ const struct optname optionnames[] = {
 #endif
 	IF_TERMIOS("hup",	&opt_hupcl)
 	IF_TERMIOS("hupcl",	&opt_hupcl)
+#ifdef I_POP
+	IF_ANY    ("i-pop-all",	&opt_streams_i_pop_all)
+#endif
+#ifdef I_PUSH
+	IF_ANY    ("i-push",	&opt_streams_i_push)
+#endif
 	IF_TERMIOS("icanon",	&opt_icanon)
 	IF_TERMIOS("icrnl",	&opt_icrnl)
 	IF_TERMIOS("iexten",	&opt_iexten)
@@ -1085,6 +1091,9 @@ const struct optname optionnames[] = {
 	IF_IP     ("pktopts",	&opt_ip_pktoptions)
 #endif
 	IF_TUN    ("pointopoint",	&opt_iff_pointopoint)
+#ifdef I_POP
+	IF_ANY    ("pop-all",	&opt_streams_i_pop_all)
+#endif
 	/*IF_IPAPP("port",	&opt_port)*/
 	IF_TUN    ("portsel",	&opt_iff_portsel)
 #if HAVE_RESOLV_H
@@ -1122,6 +1131,9 @@ const struct optname optionnames[] = {
 	IF_PTY    ("pty-intervall",	&opt_pty_intervall)
 	IF_PTY    ("pty-wait-slave",	&opt_pty_wait_slave)
 #endif /* HAVE_PTY && HAVE_POLL */
+#ifdef I_PUSH
+	IF_ANY    ("push",	&opt_streams_i_push)
+#endif
 #ifdef TCP_QUICKACK
 	IF_TCP    ("quickack",	&opt_tcp_quickack)
 #endif
@@ -1401,6 +1413,12 @@ const struct optname optionnames[] = {
 	IF_TCP    ("stdurg",	&opt_tcp_stdurg)
 #endif
 	IF_TERMIOS("stop",	&opt_vstop)
+#ifdef I_POP
+	IF_ANY    ("streams-i-pop-all",	&opt_streams_i_pop_all)
+#endif
+#ifdef I_PUSH
+	IF_ANY    ("streams-i-push",	&opt_streams_i_push)
+#endif
 	IF_ANY    ("su",	&opt_substuser)
 	IF_ANY    ("su-d",	&opt_substuser_delayed)
 	IF_ANY    ("substuser",	&opt_substuser)
@@ -2797,7 +2815,7 @@ int retropt_bind(struct opt *opts,
 /* note: not all options can be applied this way (e.g. OFUNC_SPEC with PH_OPEN)
    implemented are: OFUNC_FCNTL, OFUNC_SOCKOPT (probably not all types),
    OFUNC_TERMIOS_FLAG, OFUNC_TERMIOS_PATTERN, and some OFUNC_SPEC */
-int applyopts(int fd, struct opt *opts, unsigned int phase) {
+int applyopts(int fd, struct opt *opts, enum e_phase phase) {
    struct opt *opt;
 
    opt = opts; while (opt && opt->desc != ODESC_END) {
@@ -3574,6 +3592,12 @@ int applyopts(int fd, struct opt *opts, unsigned int phase) {
 
 #endif /* WITH_TERMIOS */
 
+#if WITH_STREAMS
+#define ENABLE_APPLYOPT
+#include "xio-streams.c"
+#undef ENABLE_APPLYOPT
+#endif /* WITH_STREAMS */
+
       } else {
 	/*Error1("applyopts(): function %d not implemented",
 	  opt->desc->func);*/
diff --git a/xioopts.h b/xioopts.h
index 2a02362..fda6718 100644
--- a/xioopts.h
+++ b/xioopts.h
@@ -105,7 +105,10 @@ enum e_func {
    OFUNC_TERMIOS_SPEC,	/* termios combined modes */
    OFUNC_SIGNAL,	/* a signal that should be passed to child process */
    OFUNC_RESOLVER,	/* a bit position used on _res.options */
-   OFUNC_IFFLAG		/* interface flag: locical-or a 1bit mask */
+   OFUNC_IFFLAG,	/* interface flag: locical-or a 1bit mask */
+#  define ENABLE_OFUNC
+#  include "xio-streams.h"	/* push a POSIX STREAMS module */
+#  undef ENABLE_OFUNC
 } ;
 
 /* for simpler handling of option-to-connection-type relations we define
@@ -689,6 +692,9 @@ enum e_optcode {
 #endif
    OPT_SOURCEPORT,
    OPT_STDERR,		/* with exec, system */
+#  define ENABLE_OPTCODE
+#  include "xio-streams.h"
+#  undef ENABLE_OPTCODE
    OPT_SUBSTUSER,
    OPT_SUBSTUSER_DELAYED,
    OPT_SYMBOLIC_LINK,	/* with pty */
@@ -899,7 +905,7 @@ extern int retropt_bind(struct opt *opts,
 		 int feats,	/* TCP etc: 1..address allowed,
 				   3..address and port allowed */
 		 unsigned long res_opts0, unsigned long res_opts1);
-extern int applyopts(int fd, struct opt *opts, unsigned int phase);
+extern int applyopts(int fd, struct opt *opts, enum e_phase phase);
 extern int applyopts2(int fd, struct opt *opts, unsigned int from,
 		      unsigned int to);
 extern int applyopts_flags(struct opt *opts, int group, flags_t *result);