Re: Detecting IP_TOS (and IPPROTO_IP vs. SOL_IP)

[Philip Prindeville]

On 3/26/10 1:51 PM, Ralf Wildenhues wrote:
> Hello Philip,
>
> * Philip A. Prindeville wrote on Mon, Mar 22, 2010 at 08:42:51AM CET:
>    
> > Calling the sequence:
> >
> > setsockopt(fd, XXXX, IP_TOS,&foo, sizeof(foo));
> >
> > can be tricky.  Linux uses SOL_IP for XXXX, whereas Solaris and BSD use
> > IPPROTO_IP for this instead.
> >
> > Not sure what MacOS or HP-UX do.
> >
> > Do the newer versions of autoconf have canned code for detecting what to
> > use?
> >      
> No.
>
> My version of Linux defines both SOL_IP and IPPROTO_IP to the same
> value.  Since changing it would seem to break the API, I *think*
> if looking at Linux alone you should be able to just go with IPPROTO_IP.
> Untested, you get to keep the pieces if it breaks.
>
>    
> > And if not, can someone please add it?
> >
> > I just grepped the 2.65 tarball but didn't find anything in there.
> >      
> Generally, for such issues it might be a good idea to just use gnulib if
> you can; but I just looked and it doesn't address this particular issue
> yet.
>
> Cheers,
> Ralf
>    

Ok, slightly different issue.

I'm trying to test for the presence/usability of <netinet/ip.h>, but on 
certain platforms I need to include <netinet/insystm.h> first.

configure:21873: checking netinet/ip.h usability
configure:21873: gcc -c -g -O2  conftest.c>&5
In file included from conftest.c:155:
/usr/include/netinet/ip.h:67: error: field `ip_src' has incomplete type
/usr/include/netinet/ip.h:67: error: field `ip_dst' has incomplete type
/usr/include/netinet/ip.h:160: error: syntax error before "n_long"
/usr/include/netinet/ip.h:162: error: field `ipt_addr' has incomplete type
/usr/include/netinet/ip.h:163: error: syntax error before "n_long"
/usr/include/netinet/ip.h:198: error: field `ippseudo_src' has incomplete type
/usr/include/netinet/ip.h:199: error: field `ippseudo_dst' has incomplete type
configure:21873: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME ""
| #define PACKAGE_TARNAME ""
| #define PACKAGE_VERSION ""
| #define PACKAGE_STRING ""
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL ""
| #define STDC_HEADERS 1
| #define HAVE_SYS_TYPES_H 1
| #define HAVE_SYS_STAT_H 1
| #define HAVE_STDLIB_H 1
| #define HAVE_STRING_H 1
| #define HAVE_MEMORY_H 1
| #define HAVE_STRINGS_H 1
| #define HAVE_INTTYPES_H 1
| #define HAVE_STDINT_H 1
| #define HAVE_UNISTD_H 1
| #define __EXTENSIONS__ 1
| #define _ALL_SOURCE 1
| #define _GNU_SOURCE 1
| #define _POSIX_PTHREAD_SEMANTICS 1
| #define _TANDEM_SOURCE 1
| #define HAVE_DLFCN_H 1
| #define LT_OBJDIR ".libs/"
| #define HAVE_PTHREAD_H 1
| #define HAVE_PTHREAD_H 1
| #define HAVE_PTHREAD_MUTEX_RECURSIVE 1
| #define HAVE_PTHREAD_KEY_DELETE 1
| #define HAVE_PTHREAD_RWLOCK_INIT 1
| #define HAVE_PTHREAD_ATTR_SETGUARDSIZE 1
| #define HAVE_PTHREAD_YIELD 1
| #define HAVE_PTHREAD_RWLOCKS 1
| #define READDIR_IS_THREAD_SAFE 1
| #define GETHOSTBYNAME_IS_THREAD_SAFE 1
| #define GETHOSTBYADDR_IS_THREAD_SAFE 1
| #define GETSERVBYNAME_IS_THREAD_SAFE 1
| #define HAVE_GETHOSTBYNAME_R 1
| #define HAVE_GETHOSTBYADDR_R 1
| #define HAVE_GETSERVBYNAME_R 1
| #define HAVE_SIGSUSPEND 1
| #define HAVE_SIGWAIT 1
| #define HAVE_POLL 1
| #define HAVE_KQUEUE 1
| #define HAVE_GETPWNAM_R 1
| #define HAVE_GETPWUID_R 1
| #define HAVE_GETGRNAM_R 1
| #define HAVE_GETGRGID_R 1
| #define HAVE_SYS_TYPES_H 1
| #define HAVE_SYS_MMAN_H 1
| #define HAVE_SYS_IPC_H 1
| #define HAVE_SYS_MUTEX_H 1
| #define HAVE_SYS_SHM_H 1
| #define HAVE_SYS_FILE_H 1
| #define HAVE_MMAP 1
| #define HAVE_MUNMAP 1
| #define HAVE_SHM_OPEN 1
| #define HAVE_SHM_UNLINK 1
| #define HAVE_SHMGET 1
| #define HAVE_SHMAT 1
| #define HAVE_SHMDT 1
| #define HAVE_SHMCTL 1
| #define HAVE_MAP_ANON 1
| #define anonymous shared memory allocation method 1
| #define USE_SHMEM_MMAP_ANON 1
| #define namebased memory allocation method 1
| #define USE_SHMEM_SHMGET 1
| #define HAVE_ALLOCA 1
| #define HAVE_CALLOC 1
| #define HAVE_SETSID 1
| #define HAVE_ISINF 1
| #define HAVE_ISNAN 1
| #define HAVE_GETENV 1
| #define HAVE_PUTENV 1
| #define HAVE_SETENV 1
| #define HAVE_UNSETENV 1
| #define HAVE_WRITEV 1
| #define HAVE_GETIFADDRS 1
| #define HAVE_UTIME 1
| #define HAVE_UTIMES 1
| #define HAVE_SETRLIMIT 1
| #define HAVE_GETRLIMIT 1
| #define HAVE_SENDFILE 1
| #define HAVE_SIGACTION 1
| #define HAVE_DECL_SYS_SIGLIST 1
| #define HAVE_FORK 1
| #define HAVE_STRERROR_R 1
| #define STRERROR_R_RC_INT 1
| #define HAVE_MMAP 1
| #define HAVE_MEMMOVE 1
| #define HAVE_GETPASS 1
| #define HAVE_GMTIME_R 1
| #define HAVE_LOCALTIME_R 1
| #define HAVE_MKSTEMP 1
| #define STDC_HEADERS 1
| #define HAVE_CTYPE_H 1
| #define HAVE_DIRENT_H 1
| #define HAVE_DLFCN_H 1
| #define HAVE_ERRNO_H 1
| #define HAVE_FCNTL_H 1
| #define HAVE_GRP_H 1
| #define HAVE_IFADDRS_H 1
| #define HAVE_LIMITS_H 1
| #define HAVE_MEMORY_H 1
| #define HAVE_NETDB_H 1
| #define HAVE_OSRELDATE_H 1
| #define HAVE_POLL_H 1
| #define HAVE_PWD_H 1
| #define HAVE_SEMAPHORE_H 1
| #define HAVE_SIGNAL_H 1
| #define HAVE_STDARG_H 1
| #define HAVE_STDDEF_H 1
| #define HAVE_STDIO_H 1
| #define HAVE_STDLIB_H 1
| #define HAVE_STRING_H 1
| #define HAVE_STRINGS_H 1
| #define HAVE_TERMIOS_H 1
| #define HAVE_TIME_H 1
| #define HAVE_UNISTD_H 1
| #define HAVE_ARPA_INET_H 1
| #define HAVE_NETINET_IN_H 1
| /* end confdefs.h.  */
| #include<stdio.h>
| #ifdef HAVE_SYS_TYPES_H
| # include<sys/types.h>
| #endif
| #ifdef HAVE_SYS_STAT_H
| # include<sys/stat.h>
| #endif
| #ifdef STDC_HEADERS
| # include<stdlib.h>
| # include<stddef.h>
| #else
| # ifdef HAVE_STDLIB_H
| #  include<stdlib.h>
| # endif
| #endif
| #ifdef HAVE_STRING_H
| # if !defined STDC_HEADERS&&  defined HAVE_MEMORY_H
| #  include<memory.h>
| # endif
| # include<string.h>
| #endif
| #ifdef HAVE_STRINGS_H
| # include<strings.h>
| #endif
| #ifdef HAVE_INTTYPES_H
| # include<inttypes.h>
| #endif
| #ifdef HAVE_STDINT_H
| # include<stdint.h>
| #endif
| #ifdef HAVE_UNISTD_H
| # include<unistd.h>
| #endif
| #include<netinet/ip.h>