Fake implementation of get_interfaces. This is needed because getifaddrs fails under NaCl and the S…

ports/samba/nacl.patch

 diff --git a/.gitignore b/.gitignore
 new file mode 100644
 --- /dev/null
 +++ b/.gitignore
 @@ -0,0 +1,2 @@
 +*.pyc
 +/bin
 diff --git a/buildtools/wafsamba/samba_python.py b/buildtools/wafsamba/samba_python.py
 --- a/buildtools/wafsamba/samba_python.py
 +++ b/buildtools/wafsamba/samba_python.py
@@ skipping 111 matching lines @@
 @@ -540,7 +540,8 @@ removeea setea
                      define='HAVE_UNIXSOCKET', headers='sys/socket.h sys/un.h')
  
  
 -    conf.CHECK_CODE('''
 +    if False:
 +      conf.CHECK_CODE('''
                      struct stat st;
                      char tpl[20]="/tmp/test.XXXXXX";
                      char tpl2[20]="/tmp/test.XXXXXX";
+diff --git a/lib/socket/interfaces.c b/lib/socket/interfaces.c
+--- a/lib/socket/interfaces.c
++++ b/lib/socket/interfaces.c
+@@ -25,6 +25,11 @@
+ #include "interfaces.h"
+ #include "lib/util/tsort.h"
+ 
++#if FAKE_GET_INTERFACES
++# include <sys/socket.h>
++# include <netinet/in.h>
++#endif
++
+ /****************************************************************************
+  Create a struct sockaddr_storage with the netmask bits set to 1.
+ ****************************************************************************/
+@@ -138,9 +143,53 @@ static int _get_interfaces(TALLOC_CTX *mem_ctx, struct iface_struct **pifaces)
+        int total = 0;
+        size_t copy_size;
+ 
++#if FAKE_GET_INTERFACES
++       // Under NaCl the API's to get network interfaces do not work. This code
++       // path provides a fake response because if nothing is returned libsmbclient
++       // will abort startup.
++       //
++       // The actual values returned here are never used as far as I can tell
++       // and name resolution/NBT is done in javascript prior to calling libsmbclient
++       // for the purposes of the Chrome Samba app.
++       iflist = talloc_array(mem_ctx, struct iface_struct, 1);
++       if (iflist == NULL) {
++               errno = ENOMEM;
++               return -1;
++       }
++
++       iflist->ifa_next = NULL;
++       iflist->ifa_name = talloc_strdup(mem_ctx, "fake");
++       // This is what my real interface returned. It might only be necessary to
++       // be IFF_BROADCAST and IFF_UP?
++       iflist->ifa_flags = 0x00011043;
++
++       // IP Address
++       struct sockaddr_in* addr = talloc(mem_ctx, struct sockaddr_in);
++       addr->sin_family = AF_INET;
++       addr->sin_port = 0;
++       inet_aton("192.168.2.3", &addr->sin_addr.s_addr);
++       iflist->ifa_addr = addr;
++
++       // Net mask
++       addr = talloc(mem_ctx, struct sockaddr_in);
++       addr->sin_family = AF_INET;
++       addr->sin_port = 0;
++       inet_aton("255.255.255.0", &addr->sin_addr.s_addr);
++       iflist->ifa_netmask = addr;
++
++       // Broadcast address.
++       addr = talloc(mem_ctx, struct sockaddr_in);
++       addr->sin_family = AF_INET;
++       addr->sin_port = 0;
++       inet_aton("192.168.2.255", &addr->sin_addr.s_addr);
++       iflist->ifa_broadaddr = addr;
++
++       iflist->ifa_data = NULL;
++#else
+        if (getifaddrs(&iflist) < 0) {
+                return -1;
+        }
++#endif
+ 
+        count = 0;
+        for (ifptr = iflist; ifptr != NULL; ifptr = ifptr->ifa_next) {
+@@ -223,7 +272,11 @@ static int _get_interfaces(TALLOC_CTX *mem_ctx, struct iface_struct **pifaces)
+                total++;
+        }
+ 
++// Since the iflist was allocated by talloc in the FAKE_GET_INTERFACES case it
++// doesn't need to be deleted.
++#if !FAKE_GET_INTERFACES
+        freeifaddrs(iflist);
++#endif
+ 
+        *pifaces = ifaces;
+        return total;
 diff --git a/source3/wscript b/source3/wscript
 --- a/source3/wscript
 +++ b/source3/wscript
 @@ -130,7 +130,7 @@ long ret = splice(0,0,1,0,400,SPLICE_F_MOVE);
  #endif
  main() {
          exit(fcntl(open("/tmp", O_RDONLY), F_NOTIFY, 0) == -1 ?  1 : 0);
 -}''', 'HAVE_KERNEL_CHANGE_NOTIFY', addmain=False, execute=True,
 +}''', 'HAVE_KERNEL_CHANGE_NOTIFY', addmain=False, #execute=True,
          headers='fcntl.h signal.h',
@@ skipping 183 matching lines @@
      conf.SAMBA_CHECK_PERL(mandatory=True)
      conf.find_program('xsltproc', var='XSLTPROC')
  
 -    conf.SAMBA_CHECK_PYTHON(mandatory=True, version=(2,5,0))
 -    conf.SAMBA_CHECK_PYTHON_HEADERS(mandatory=True)
 +    conf.SAMBA_CHECK_PYTHON(mandatory=False, version=(2,5,0))
 +    conf.SAMBA_CHECK_PYTHON_HEADERS(mandatory=False)
  
      if sys.platform == 'darwin' and not conf.env['HAVE_ENVIRON_DECL']:
          # Mac OSX needs to have this and it's also needed that the python is compiled with this