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fee764a5d8
The comment in struct_ip.h explains the reasoning for this. The AIX C library uses #defines that change the names of members of struct ip, and conflict with some existing code. (Notably struct ip_hdr in libdnet and IPv4Header::h in libnetutil.) We can still use the AIX files if we include <netinet/ip.h> after this other code has been preprocessed. That's hard to enforce when <netinet/ip.h> is included from another header file; this new file allows including it always late, and only where needed.
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/* The C library on AIX defines the names of various members of struct ip to
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something else in <netinet/ip.h>:
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struct ip {
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struct ip_firstfour ip_ff;
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#define ip_v ip_ff.ip_fv
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#define ip_hl ip_ff.ip_fhl
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#define ip_vhl ip_ff.ip_fvhl
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#define ip_tos ip_ff.ip_ftos
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#define ip_len ip_ff.ip_flen
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This breaks code that actually wants to use names like ip_v for its own
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purposes, like struct ip_hdr in libdnet. The AIX definitions will work
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if they are included late in the list of includes, before other code that
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might want to use the above names has already been preprocessed. The
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includes that end up defining struct ip are therefore limited to this
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file, so it can be included in a .cc file after other .h have been
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included. */
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/* Linux uses these defines in netinet/ip.h to use the correct struct ip */
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#ifndef __FAVOR_BSD
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#define __FAVOR_BSD
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#endif
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#ifndef __USE_BSD
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#define __USE_BSD
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#endif
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#ifndef _BSD_SOURCE
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#define _BSD_SOURCE
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#endif
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/* BSDI needs this to insure the correct struct ip */
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#undef _IP_VHL
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#ifndef NETINET_IN_SYSTM_H /* This guarding is needed for at least some versions of OpenBSD */
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#include <netinet/in_systm.h> /* defines n_long needed for netinet/ip.h */
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#define NETINET_IN_SYSTM_H
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#endif
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#ifndef NETINET_IP_H /* This guarding is needed for at least some versions of OpenBSD */
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#include <netinet/ip.h>
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#define NETINET_IP_H
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#endif
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#ifndef WIN32
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#include <netinet/ip_icmp.h>
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#endif
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