From c02f439d73f33c727909131cb4d9d01029d7492f Mon Sep 17 00:00:00 2001
From: "Gerd v. Egidy" <gerd.von.egidy@intra2net.com>
Date: Mon, 11 Jul 2022 20:40:03 +0200
Subject: [PATCH] implement autoconf/automake support for libz and fopencookie
 usage

---
 configure.ac    | 25 +++++++++++++++++++++++++
 src/Makefile.am |  5 +++++
 2 files changed, 30 insertions(+)

diff --git a/configure.ac b/configure.ac
index e66fd9e..d950587 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,6 +29,9 @@ AC_PROG_EGREP
 AC_LANG(C)
 AM_PROG_CC_C_O
 
+# we might want to use this with zlib for compressed pcap support
+AC_CHECK_FUNCS([fopencookie])
+
 #######################################################################
 # Check for other REQUIRED libraries
 AC_CHECK_LIB([pthread], [pthread_create], [], [
@@ -255,12 +258,33 @@ AS_IF([test "x$USE_EEP" = "xyes"], [
 	AC_DEFINE([USE_EEP],[],[Compile With EEP support])
 ], [])
 
+####
+#### zlib Support
+####
+AC_ARG_WITH([zlib],
+    AS_HELP_STRING([--with-zlib], [Enable zlib to support gzip compressed pcap files]),
+    [AC_SUBST(WITH_ZLIB, $withval)],
+    [AC_SUBST(WITH_ZLIB, no)]
+)
+
+AS_IF([test "x$WITH_ZLIB" = "xyes"], [
+	AC_CHECK_HEADER([zlib.h], [], [
+	    AC_MSG_ERROR([ You need libz header files installed to compile with zlib support.])
+	])
+	AC_CHECK_LIB([z], [gzdopen], [], [
+	    AC_MSG_ERROR([ You need libz library installed to compile with zlib support.])
+	])
+	AC_DEFINE([WITH_ZLIB],[],[Compile With zlib support])
+], [])
+
+
 
 # Conditional Source inclusion
 AM_CONDITIONAL([WITH_PCRE2], [test "x$WITH_PCRE2" = "xyes"])
 AM_CONDITIONAL([WITH_GNUTLS], [test "x$WITH_GNUTLS" = "xyes"])
 AM_CONDITIONAL([WITH_OPENSSL], [test "x$WITH_OPENSSL" = "xyes"])
 AM_CONDITIONAL([USE_EEP], [test "x$USE_EEP" = "xyes"])
+AM_CONDITIONAL([WITH_ZLIB], [test "x$WITH_ZLIB" = "xyes"])
 
 
 ######################################################################
@@ -291,6 +315,7 @@ AC_MSG_NOTICE( Perl Expressions Support     : ${WITH_PCRE}              )
 AC_MSG_NOTICE( Perl Expressions Support (v2): ${WITH_PCRE2}             )
 AC_MSG_NOTICE( IPv6 Support                 : ${USE_IPV6}               )
 AC_MSG_NOTICE( EEP Support                  : ${USE_EEP}               )
+AC_MSG_NOTICE( Zlib Support                 : ${WITH_ZLIB}               )
 AC_MSG_NOTICE( ====================================================== 	)
 AC_MSG_NOTICE
 
diff --git a/src/Makefile.am b/src/Makefile.am
index c6d7a1d..309c707 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -20,6 +20,11 @@ if WITH_PCRE2
 sngrep_CFLAGS+=$(PCRE2_CFLAGS)
 sngrep_LDADD+=$(PCRE2_LIBS)
 endif
+if WITH_ZLIB
+sngrep_CFLAGS+=$(ZLIB_CFLAGS)
+sngrep_LDADD+=$(ZLIB_LIBS)
+endif
+
 sngrep_SOURCES+=address.c packet.c sip.c sip_call.c sip_msg.c sip_attr.c main.c
 sngrep_SOURCES+=option.c group.c filter.c keybinding.c media.c setting.c rtp.c
 sngrep_SOURCES+=util.c hash.c vector.c curses/ui_panel.c curses/scrollbar.c