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A C library for asynchronous DNS requests (grpc依赖)
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c-ares/docs/acountry.1

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provide SPDX identifiers and a REUSE CI job to verify All files have their licence and copyright information clearly identifiable. If not in the file header, they are set separately in .reuse/dep5. All used license texts are provided in LICENSES/
2 years ago
.\"
.\" Copyright (C) the Massachusetts Institute of Technology.
.\" Copyright (C) Daniel Stenberg
.\" SPDX-License-Identifier: MIT
.\"
Avoid buffer overflow in RC4 loop comparison (#336) The rc4 function iterates over a buffer of size buffer_len who's maximum value is INT_MAX with a counter of type short that is not guaranteed to have maximum size INT_MAX. In circumstances where short is narrower than int and where buffer_len is larger than the maximum value of a short, it may be possible to loop infinitely as counter will overflow and never be greater than or equal to buffer_len. The solution is to make the comparison be between types of equal width. This commit defines counter as an int. Fix By: Fionn Fitzmaurice (@fionn)
5 years ago
.TH ACOUNTRY "1" "April 2011" "c-ares utilities"
.SH NAME
acountry \- print the country where an IPv4 address or host is located
.SH SYNOPSIS
.B acountry
[\fIOPTION\fR]... \fIHOST\fR...
.SH DESCRIPTION
.PP
.\" Add any additional description here
.PP
Print the country where HOST (an IPv4 address or hostname) is located,
using the countries.nerd.dk DNS domain to identify the country.
.PP
This utility comes with the \fBc\-ares\fR asynchronous resolver library.
.SH OPTIONS
.TP
\fB\-d\fR
Print some extra debugging output.
.TP
tools: refine help (#481) fix invalid help options and documentation typos Fix By: @lifenjoiner
3 years ago
\fB\-h\fR, \fB\-?\fR
Avoid buffer overflow in RC4 loop comparison (#336) The rc4 function iterates over a buffer of size buffer_len who's maximum value is INT_MAX with a counter of type short that is not guaranteed to have maximum size INT_MAX. In circumstances where short is narrower than int and where buffer_len is larger than the maximum value of a short, it may be possible to loop infinitely as counter will overflow and never be greater than or equal to buffer_len. The solution is to make the comparison be between types of equal width. This commit defines counter as an int. Fix By: Fionn Fitzmaurice (@fionn)
5 years ago
Display this help and exit.
.TP
\fB\-v\fR
Be more verbose. Print extra information.
.SH "REPORTING BUGS"
Report bugs to the c-ares mailing list:
Change the mailman links (#358) Links when wrapping become misleading. Insert newline to prevent wrapping. Fix By: Gisle Vanem (@gvanem)
5 years ago
.br
mailing list: moved to lists.haxx.se
4 years ago
\fBhttps://lists.haxx.se/listinfo/c-ares\fR
Avoid buffer overflow in RC4 loop comparison (#336) The rc4 function iterates over a buffer of size buffer_len who's maximum value is INT_MAX with a counter of type short that is not guaranteed to have maximum size INT_MAX. In circumstances where short is narrower than int and where buffer_len is larger than the maximum value of a short, it may be possible to loop infinitely as counter will overflow and never be greater than or equal to buffer_len. The solution is to make the comparison be between types of equal width. This commit defines counter as an int. Fix By: Fionn Fitzmaurice (@fionn)
5 years ago
.SH "SEE ALSO"
.PP
adig(1), ahost(1).
.PP
The DNSBL countries.nerd.dk
.br
\fBhttp://countries.nerd.dk/\fR
.SH AUTHOR
Gisle Vanem