I think I'm done with pcap upgrade and doug's pcap selectable_fd patch

2025-12-06 04:31:29 +00:00 · 2006-08-17 00:23:03 +00:00
parent 95d727ce3b
commit 3d9ccee8ff
12 changed files with 134 additions and 53 deletions
--- a/11
+++ b/11
@@ -1,7 +1,18 @@
 # Nmap Changelog ($Id$); -*-text-*-
+4.20ALPHA5
+
 o Worked with Zhao to improve the new OS detection system with
  better algorithms and bug fixes.

+o Nmap now uses the (relatively) new libpcap pcap_get_selectable_fd
+  API on systems which support it.  This means that we no longer need to
+  hack the included Pcap to better support Linux.  So Nmap will now link
+  with an existing system libpcap by default on that platform if one is
+  detected.
+
+o Updated the included libpcap from 0.9.3 to 0.9.4.  The changes I
+  made are in libpcap/NMAP_MODIFICATIONS .
+
 o Applied some nsock bugfixes from Diman Todorov.  These don't
  affect the current version of Nmap, but are important for his upcoming
  Nmap Scripting Engine.
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,4 +1,4 @@
-export NMAP_VERSION = 4.20ALPHA4
+export NMAP_VERSION = 4.20ALPHA5
 NMAP_NAME= Nmap
 NMAP_URL= http://www.insecure.org/nmap/
 NMAP_PLATFORM=@host@
--- a/6
+++ b/6
@@ -5842,9 +5842,9 @@ fi

 fi;

-if test $linux = yes; then
-  have_libpcap=no
-fi
+#if test $linux = yes; then
+#  have_libpcap=no
+#fi

 if test $needs_cpp_precomp = yes; then
  CXXFLAGS="-no-cpp-precomp $CXXFLAGS"
--- a/configure.ac
+++ b/configure.ac
@@ -356,9 +356,9 @@ AC_ARG_WITH(libpcap,
  esac]
 )

-if test $linux = yes; then
-  have_libpcap=no
-fi
+#if test $linux = yes; then
+#  have_libpcap=no
+#fi

 if test $needs_cpp_precomp = yes; then
  CXXFLAGS="-no-cpp-precomp $CXXFLAGS"
--- a/docs/nmap.1
+++ b/docs/nmap.1
@@ -2,7 +2,7 @@
 .\" It was generated using the DocBook XSL Stylesheets (version 1.69.1).
 .\" Instead of manually editing it, you probably should edit the DocBook XML
 .\" source for it and then use the DocBook XSL Stylesheets to regenerate it.
-.TH "NMAP" "1" "08/07/2006" "" "Nmap Reference Guide"
+.TH "NMAP" "1" "08/16/2006" "" "Nmap Reference Guide"
 .\" disable hyphenation
 .nh
 .\" disable justification (adjust text to left margin only)
--- a/docs/nmap.usage.txt
+++ b/docs/nmap.usage.txt
@@ -1,4 +1,4 @@
-Nmap 4.20ALPHA4 ( http://www.insecure.org/nmap/ )
+Nmap 4.20ALPHA5 ( http://www.insecure.org/nmap/ )
 Usage: nmap [Scan Type(s)] [Options] {target specification}
 TARGET SPECIFICATION:
  Can pass hostnames, IP addresses, networks, etc.
@@ -18,6 +18,7 @@ HOST DISCOVERY:
  --system-dns: Use OS's DNS resolver
 SCAN TECHNIQUES:
  -sS/sT/sA/sW/sM: TCP SYN/Connect()/ACK/Window/Maimon scans
+  -sU: UDP Scan
  -sN/sF/sX: TCP Null, FIN, and Xmas scans
  --scanflags <flags>: Customize TCP scan flags
  -sI <zombie host[:probeport]>: Idlescan
@@ -36,8 +37,8 @@ SERVICE/VERSION DETECTION:
  --version-trace: Show detailed version scan activity (for debugging)
 OS DETECTION:
  -O: Enable OS detection (try 2nd generation, then 1st if that fails)
-  -O1: Only use the old (1st generation) OS detection system
  -O2: Only use the new OS detection system (no fallback)
+  -O1: Only use the old (1st generation) OS detection system
  --osscan-limit: Limit OS detection to promising targets
  --osscan-guess: Guess OS more aggressively
 TIMING AND PERFORMANCE:
--- a/libdnet-stripped/include/stamp-h1
+++ b/libdnet-stripped/include/stamp-h1
@@ -1 +0,0 @@
-timestamp for include/config.h
--- a/libpcap/NMAP_MODIFICATIONS
+++ b/libpcap/NMAP_MODIFICATIONS
@@ -204,3 +204,5 @@ is in use.  Here is that patch:
 # Makefile.in includes rules to generate version.h, so we assume
 # that it will be generated if autoconf is used.

+o Ran autoconf to regenerate configure (I ship those with the Nmap
+  tarball rather than generating them at build time).
--- a/nmap_dns.cc
+++ b/nmap_dns.cc
@@ -1185,7 +1185,7 @@ static void nmap_mass_rdns_core(Target **targets, int num_targets) {
    log_write(LOG_STDOUT, "Performing system-dns for %d domain names that use CNAMEs\n", (int) cname_reqs.size());

  if (cname_reqs.size()) {
-    snprintf(spmobuf, sizeof(spmobuf), "System CNAME DNS resolution of %d host%s.", cname_reqs.size(), cname_reqs.size()-1 ? "s" : "");
+    snprintf(spmobuf, sizeof(spmobuf), "System CNAME DNS resolution of %u host%s.", (unsigned) cname_reqs.size(), cname_reqs.size()-1 ? "s" : "");
    SPM = new ScanProgressMeter(spmobuf);

    for(i=0, reqI = cname_reqs.begin(); reqI != cname_reqs.end(); reqI++, i++) {
--- a/nmap_winconfig.h
+++ b/nmap_winconfig.h
@@ -106,7 +106,7 @@
 /* Without this, Windows will give us all sorts of crap about using functions
   like strcpy() even if they are done safely */
 #define _CRT_SECURE_NO_DEPRECATE 1
-#define NMAP_VERSION "4.20ALPHA4"
+#define NMAP_VERSION "4.20ALPHA5"
 #define NMAP_NAME "Nmap"
 #define NMAP_URL "http://www.insecure.org/nmap"
 #define NMAP_PLATFORM "i686-pc-windows-windows"
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -58,7 +58,7 @@ distro:
 # Make the RPM .spec file
 	sed -e s/\@VERSION\@/$(NMAP_VERSION)/g ../nmap.spec.in > ../nmap-$(NMAP_VERSION)-1.spec
 # Canonicalize and sort Nmap OS fingerprint DB
-	sort-prints.pl ../nmap-os-fingerprints > nos && mv nos ../nmap-os-fingerprints
+#	sort-prints.pl ../nmap-os-fingerprints > nos && mv nos ../nmap-os-fingerprints
 	$(MAKE) -C .. clean
 	cd .. && rm -f $(LIBPCAPDIR)/config.cache $(LIBPCAPDIR)/Makefile
 	cd .. && unix2dos README-WIN32
@@ -92,43 +92,43 @@ distro:
           nsis/Nmap.nsi resource.h RPC/Rpc_cut.h winclude.h winfix.cc \
           winfix.h Makefile /usr/tmp/nmap-$(NMAP_VERSION)/mswin32
 	$(SHTOOL) mkdir /usr/tmp/nmap-$(NMAP_VERSION)/$(LIBPCAPDIR)
-	cd ../$(LIBPCAPDIR); cp -a --parents acconfig.h aclocal.m4 arcnet.h \
-            atmuni31.h bpf/net/bpf.h bpf/net/bpf_filter.c \
-            bpf_dump.c bpf_image.c CHANGES \
-            ChmodBPF/ChmodBPF ChmodBPF/StartupParameters.plist config.guess \
-            config.h config.h.in config.sub \
-            configure configure.ac CREDITS doc/pcap.txt doc/pcap.xml \
-            doc/pcap.html etherent.c ethertype.h fad-getad.c fad-gifc.c \
-            fad-glifc.c fad-null.c fad-win32.c FILES gencode.c gencode.h \
-            grammar.c grammar.y inet.c install-sh INSTALL.txt lbl/os-sunos4.h \
-            lbl/os-ultrix4.h lbl/os-aix4.h lbl/os-osf4.h lbl/os-hpux11.h \
-            lbl/os-osf5.h lbl/os-solaris2.h LICENSE llc.h Makefile.in \
-            missing/snprintf.c mkdep msdos/makefile.wc msdos/bin2c.c \
-            msdos/pkt_rx0.asm msdos/pktdrvr.h msdos/ndis2.h msdos/ndis2.c \
-            msdos/pkt_rx1.s msdos/common.dj msdos/makefile msdos/pktdrvr.c \
-            msdos/readme.dos msdos/ndis_0.asm msdos/makefile.dj nametoaddr.c \
-            nlpid.h NMAP_MODIFICATIONS optimize.c packaging/pcap.spec.in \
-            pcap1.h pcap.3 pcap-bpf.c pcap-bpf.h pcap.c \
-            pcap-dag.c pcap-dag.h pcap-dlpi.c pcap-dos.c pcap-dos.h \
-            pcap-enet.c pcap.h pcap-int.h pcap-linux.c pcap-namedb.h \
-            pcap-nit.c pcap-nit.h pcap-null.c pcap-pf.c pcap-pf.h \
-            pcap-septel.c pcap-septel.h pcap-snit.c pcap-snoop.c \
-            pcap-stdinc.h pcap-win32.c pf.h ppp.h README README.aix \
-            README.dag README.hpux README.linux README.macosx README.septel \
-            README.tru64 README.Win32 savefile.c scanner.c scanner.l sll.h \
-            sunatmpos.h SUNOS4/nit_if.o.sun4c.4.0.3c SUNOS4/nit_if.o.sun3 \
-            SUNOS4/nit_if.o.sparc TODO tokdefs.h VERSION version.h \
-            Win32/Include/addrinfo.h Win32/Include/Gnuc.h \
-            Win32/Include/arpa/nameser.h Win32/Include/cdecl_ext.h \
-            Win32/Include/ip6_misc.h Win32/Include/bittypes.h \
-            Win32/Include/net/if.h Win32/Include/net/paths.h \
-            Win32/Include/net/netdb.h Win32/Include/sockstorage.h \
-            Win32/Include/inetprivate.h Win32/Src/getservent.c \
-            Win32/Src/getaddrinfo.c Win32/Src/ffs.c Win32/Src/getnetbynm.c \
-            Win32/Src/inet_net.c Win32/Src/getnetent.c Win32/Src/getopt.c \
-            Win32/Src/inet_aton.c Win32/Src/inet_pton.c Win32/Prj/libpcap.dsw \
-            Win32/Prj/libpcap.dsp \
-            /usr/tmp/nmap-$(NMAP_VERSION)/$(LIBPCAPDIR)
+	cd ../$(LIBPCAPDIR); cp -dp --parents acconfig.h aclocal.m4 arcnet.h \
+           atmuni31.h bpf_dump.c bpf_image.c CHANGES \
+           config.guess config.h.in config.sub configure configure.ac \
+           CREDITS etherent.c ethertype.h fad-getad.c fad-gifc.c \
+           fad-glifc.c fad-null.c fad-win32.c FILES gencode.c gencode.h \
+           grammar.c grammar.y inet.c install-sh INSTALL.txt LICENSE \
+           llc.h Makefile.in mkdep nametoaddr.c net nlpid.h \
+           NMAP_MODIFICATIONS optimize.c pcap1.h pcap.3 pcap-bpf.c \
+           pcap-bpf.h pcap.c pcap-dag.c pcap-dag.h pcap-dlpi.c pcap-dos.c \
+           pcap-dos.h pcap-enet.c pcap.h pcap-int.h pcap-linux.c \
+           pcap-namedb.h pcap-nit.c pcap-nit.h pcap-null.c pcap-pf.c \
+           pcap-pf.h pcap-septel.c pcap-septel.h pcap-snit.c pcap-snoop.c \
+           pcap-stdinc.h pcap-win32.c pf.h ppp.h README README.aix \
+           README.dag README.hpux README.linux README.macosx README.septel \
+           README.tru64 README.Win32 savefile.c scanner.c scanner.l sll.h \
+           sunatmpos.h TODO tokdefs.h VERSION version.h \
+           ChmodBPF/ChmodBPF ChmodBPF/StartupParameters.plist \
+           doc/pcap.html doc/pcap.txt doc/pcap.xml lbl/os-aix4.h \
+           lbl/os-hpux11.h lbl/os-osf4.h lbl/os-osf5.h lbl/os-solaris2.h \
+           lbl/os-sunos4.h lbl/os-ultrix4.h missing/snprintf.c \
+           msdos/bin2c.c msdos/common.dj msdos/makefile msdos/makefile.dj \
+           msdos/makefile.wc msdos/ndis_0.asm msdos/ndis2.c msdos/ndis2.h \
+           msdos/pktdrvr.c msdos/pktdrvr.h msdos/pkt_rx0.asm msdos/pkt_rx1.s \
+           msdos/readme.dos SUNOS4/nit_if.o.sparc \
+           SUNOS4/nit_if.o.sun3 SUNOS4/nit_if.o.sun4c.4.0.3c \
+           bpf/net/bpf_filter.c Win32/Include/addrinfo.h \
+           Win32/Include/bittypes.h Win32/Include/cdecl_ext.h \
+           Win32/Include/Gnuc.h Win32/Include/inetprivate.h \
+           Win32/Include/ip6_misc.h \
+           Win32/Include/sockstorage.h Win32/Prj/libpcap.dsp \
+           Win32/Prj/libpcap.dsw Win32/Src/ffs.c Win32/Src/getaddrinfo.c \
+           Win32/Src/getnetbynm.c Win32/Src/getnetent.c Win32/Src/getopt.c \
+           Win32/Src/getservent.c Win32/Src/inet_aton.c Win32/Src/inet_net.c \
+           Win32/Src/inet_pton.c Win32/Include/arpa/nameser.h \
+           Win32/Include/net/if.h Win32/Include/net/netdb.h \
+           Win32/Include/net/paths.h \
+           /usr/tmp/nmap-$(NMAP_VERSION)/$(LIBPCAPDIR)
 	$(SHTOOL) mkdir /usr/tmp/nmap-$(NMAP_VERSION)/docs
 	cd ../docs; cp -a README nmap_gpgkeys.txt \
                    nmap.usage.txt  \
--- a/tcpip.cc
+++ b/tcpip.cc
@@ -1557,11 +1557,13 @@ unsigned int offset = 0;
 struct pcap_pkthdr head;
 char *p;
 int datalink;
+int pcap_descriptor=-1; // -1 means we CANNOT select()
 int timedout = 0;
 struct timeval tv_start, tv_end;
 static char *alignedbuf = NULL;
 static unsigned int alignedbufsz=0;
 static int warning = 0;
+
 if (linknfo) { memset(linknfo, 0, sizeof(*linknfo)); }

 if (!pd) fatal("NULL packet device passed to readip_pcap");
@@ -1647,6 +1649,14 @@ if (!pd) fatal("NULL packet device passed to readip_pcap");
 if (to_usec > 0) {
   gettimeofday(&tv_start, NULL);
 }
+
+// Add other systems here if they don't support select()able pcap descriptors
+#ifdef WIN32
+ pcap_descriptor = -1;
+#else
+ pcap_descriptor = pcap_get_selectable_fd(pd);
+#endif
+
 do {
 #ifdef WIN32
   gettimeofday(&tv_end, NULL);
@@ -1655,7 +1665,32 @@ if (!pd) fatal("NULL packet device passed to readip_pcap");
   PacketSetReadTimeout(pd->adapter, to_left);
 #endif

-   p = (char *) pcap_next(pd, &head);
+   p = NULL;
+   if (pcap_descriptor != -1) {
+     fd_set rfds;
+     struct timeval sel_tv;
+     int rv=0;
+
+     FD_ZERO(&rfds);
+     FD_SET(pcap_descriptor, &rfds);
+
+     sel_tv.tv_sec = to_usec/1000000;
+     sel_tv.tv_usec = to_usec%1000000;
+
+     rv = select(pcap_descriptor+1, &rfds, NULL, NULL, to_usec ? &sel_tv : NULL);
+
+     if (rv == -1) {
+       fatal("Your system does not support select()ing on pcap devices (%s). PLEASE REPORT THIS ALONG WITH DETAILED SYSTEM INFORMATION TO THE nmap-dev MAILING LIST!", strerror(errno));
+     } else if (rv == 0) {
+       timedout = 1;
+     } else {
+       p = (char *) pcap_next(pd, &head);
+     }
+   } else {
+     // THIS CALL CAN BLOCK INAPPROPRIATLEY! (ie, will block until it sees another
+     // packet - to_usec notwithstanding) Use the select() code if possible.
+     p = (char *) pcap_next(pd, &head);
+   }

   if (p) {
     if (head.caplen <= offset) {
@@ -1805,6 +1840,7 @@ int read_arp_reply_pcap(pcap_t *pd, u8 *sendermac, struct in_addr *senderIP,
  int timedout = 0;
  int badcounter = 0;
  struct timeval tv_start, tv_end;
+  int pcap_descriptor = -1;

  if (!pd) fatal("NULL packet device passed to readarp_reply_pcap");

@@ -1839,7 +1875,39 @@ int read_arp_reply_pcap(pcap_t *pd, u8 *sendermac, struct in_addr *senderIP,
    }
 #endif

-    p = (u8 *) pcap_next(pd, &head);
+// Add other systems here if they don't support select()able pcap descriptors
+#ifdef WIN32
+    pcap_descriptor = -1;
+#else
+    pcap_descriptor = pcap_get_selectable_fd(pd);
+#endif
+
+   p = NULL;
+   if (pcap_descriptor != -1) {
+     fd_set rfds;
+     struct timeval sel_tv;
+     int rv=0;
+
+     FD_ZERO(&rfds);
+     FD_SET(pcap_descriptor, &rfds);
+
+     sel_tv.tv_sec = to_usec/1000000;
+     sel_tv.tv_usec = to_usec%1000000;
+
+     rv = select(pcap_descriptor+1, &rfds, NULL, NULL, to_usec ? &sel_tv : NULL);
+
+     if (rv == -1) {
+       fatal("Your system does not support select()ing on pcap devices (%s). PLEASE REPORT THIS ALONG WITH DETAILED SYSTEM INFORMATION TO THE nmap-dev MAILING LIST!", strerror(errno));
+     } else if (rv == 0) {
+       timedout = 1;
+     } else {
+       p = (u8 *) pcap_next(pd, &head);
+     }
+   } else {
+     // THIS CALL CAN BLOCK INAPPROPRIATLEY! (ie, will block until it sees another
+     // packet - to_usec notwithstanding) Use the select() code if possible.
+     p = (u8 *) pcap_next(pd, &head);
+   }

    if (p && head.caplen >= 42) { /* >= because Ethernet padding makes 60 */
      /* frame type 0x0806 (arp), hw type eth (0x0001), prot ip (0x0800),