This file is indexed.

/usr/include/ip4.h is in libowfat-dev 0.29-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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/* this header file comes from libowfat, http://www.fefe.de/libowfat/ */
#ifndef IP4_H
#define IP4_H

#ifdef __cplusplus
extern "C" {
#endif

unsigned int scan_ip4(const char *src,char *ip);
unsigned int fmt_ip4(char *dest,const char *ip);

/* for djb backwards compatibility */
#define ip4_scan scan_ip4
#define ip4_fmt fmt_ip4

#define IP4_FMT 20
#define FMT_IP4 20

extern const char ip4loopback[4]; /* = {127,0,0,1};*/

#ifdef __cplusplus
}
#endif

#endif