.TH scan_ip4 3 .SH NAME scan_ip4 \- parse an IPv4 number in dotted-decimal notation .SH SYNTAX .B #include int \fBscan_ip4\fP(const char *\fIsrc\fR,char \fIip\fR[4]); .SH DESCRIPTION scan_ip4 parses an IPv4 number in dotted-decimal ASCII representation from \fIsrc\fR and writes the result into \fIip\fR. It returns the number of bytes read from \fIsrc\fR or 0 if the parsing failed. Unlike many other IP parsing routines, scan_ip4 does not recognize octal (like \fB0177.0.0.1\fR) or hexadecimal numbers (like \fB0x7f000001\fR). .SH EXAMPLE #include .br #include char buf[]="160.45.40.10"; char ip[4]; if (scan_ip4(buf,ip) != str_len(buf)) parse_error(); .SH "SEE ALSO" fmt_ip4(3), scan_ip6(3)