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A C library for asynchronous DNS requests (grpc依赖)
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c-ares/docs/adig.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/
1 year 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)
4 years ago
.TH ADIG "1" "April 2011" "c-ares utilities"
.SH NAME
adig \- print information collected from Domain Name System (DNS) servers
.SH SYNOPSIS
.B adig
[\fIOPTION\fR]... \fINAME\fR...
.SH DESCRIPTION
.PP
.\" Add any additional description here
.PP
Send queries to DNS servers about \fINAME\fR and print received
information, where \fINAME\fR is a valid DNS name (e.g. www.example.com,
1.2.3.10.in-addr.arpa).
.PP
This utility comes with the \fBc\-ares\fR asynchronous resolver library.
.SH OPTIONS
.TP
\fB\-c\fR class
Set the query class.
Possible values for class are
tools: refine help (#481) fix invalid help options and documentation typos Fix By: @lifenjoiner
2 years ago
ANY, CHAOS, HS and IN (default).
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)
4 years ago
.TP
\fB\-d\fR
Print some extra debugging output.
.TP
\fB\-f\fR flag
tools: refine help (#481) fix invalid help options and documentation typos Fix By: @lifenjoiner
2 years ago
Add a behavior control flag.
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)
4 years ago
Possible values for flag are
rewrite adig using new helpers (#607) adig previously performed manual parsing of the DNS records. Now it can focus strictly on formatting of output data for printing. It simply iterates across the parsed DNS packet and queries for the RRs, parameters for each RR, and the datatypes for each parameter. adig will now automatically pick up new RRs from the c-ares library due to the dynamic nature. The adig format also now more closely resembles that of BIND's `dig` output. A few more helpers needed to be added to the c-ares library that were missing. There ware a couple of minor bugs and enhancements also needed. Example: ``` ./adig -t ANY www.google.com ; <<>> c-ares DiG 1.21.0 <<>> www.google.com ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: RCODE, id: 23913 ;; flags: qr rd ra; QUERY: 1, ANSWER: 11, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: 0; udp: 512 ;; QUESTION SECTION: ;www.google.com. IN ANY ;; ANSWER SECTION: www.google.com. 162 IN A 142.251.107.99 www.google.com. 162 IN A 142.251.107.105 www.google.com. 162 IN A 142.251.107.103 www.google.com. 162 IN A 142.251.107.147 www.google.com. 162 IN A 142.251.107.104 www.google.com. 162 IN A 142.251.107.106 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::93 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::69 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::68 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::6a www.google.com. 21462 IN HTTPS 1 . alpn="h2,h3" ;; MSG SIZE rcvd: 276 ``` Fix By: Brad House (@bradh352)
1 year ago
igntc - ignore query truncation, return answer as-is instead of retrying
via tcp.
tools: refine help (#481) fix invalid help options and documentation typos Fix By: @lifenjoiner
2 years ago
noaliases - don't honor the HOSTALIASES environment variable,
norecurse - don't query upstream servers recursively,
rewrite adig using new helpers (#607) adig previously performed manual parsing of the DNS records. Now it can focus strictly on formatting of output data for printing. It simply iterates across the parsed DNS packet and queries for the RRs, parameters for each RR, and the datatypes for each parameter. adig will now automatically pick up new RRs from the c-ares library due to the dynamic nature. The adig format also now more closely resembles that of BIND's `dig` output. A few more helpers needed to be added to the c-ares library that were missing. There ware a couple of minor bugs and enhancements also needed. Example: ``` ./adig -t ANY www.google.com ; <<>> c-ares DiG 1.21.0 <<>> www.google.com ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: RCODE, id: 23913 ;; flags: qr rd ra; QUERY: 1, ANSWER: 11, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: 0; udp: 512 ;; QUESTION SECTION: ;www.google.com. IN ANY ;; ANSWER SECTION: www.google.com. 162 IN A 142.251.107.99 www.google.com. 162 IN A 142.251.107.105 www.google.com. 162 IN A 142.251.107.103 www.google.com. 162 IN A 142.251.107.147 www.google.com. 162 IN A 142.251.107.104 www.google.com. 162 IN A 142.251.107.106 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::93 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::69 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::68 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::6a www.google.com. 21462 IN HTTPS 1 . alpn="h2,h3" ;; MSG SIZE rcvd: 276 ``` Fix By: Brad House (@bradh352)
1 year ago
primary - use the first server,
stayopen - don't close the communication sockets, and
usevc - always use TCP.
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)
4 years ago
.TP
tools: refine help (#481) fix invalid help options and documentation typos Fix By: @lifenjoiner
2 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)
4 years ago
Display this help and exit.
.TP
\fB\-s\fR server
Connect to specified DNS server, instead of the system's default one(s).
tools: refine help (#481) fix invalid help options and documentation typos Fix By: @lifenjoiner
2 years ago
Servers are tried in round-robin, if the previous one failed.
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)
4 years ago
.TP
\fB\-t\fR type
Query records of specified type.
Possible values for type are
rewrite adig using new helpers (#607) adig previously performed manual parsing of the DNS records. Now it can focus strictly on formatting of output data for printing. It simply iterates across the parsed DNS packet and queries for the RRs, parameters for each RR, and the datatypes for each parameter. adig will now automatically pick up new RRs from the c-ares library due to the dynamic nature. The adig format also now more closely resembles that of BIND's `dig` output. A few more helpers needed to be added to the c-ares library that were missing. There ware a couple of minor bugs and enhancements also needed. Example: ``` ./adig -t ANY www.google.com ; <<>> c-ares DiG 1.21.0 <<>> www.google.com ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: RCODE, id: 23913 ;; flags: qr rd ra; QUERY: 1, ANSWER: 11, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: 0; udp: 512 ;; QUESTION SECTION: ;www.google.com. IN ANY ;; ANSWER SECTION: www.google.com. 162 IN A 142.251.107.99 www.google.com. 162 IN A 142.251.107.105 www.google.com. 162 IN A 142.251.107.103 www.google.com. 162 IN A 142.251.107.147 www.google.com. 162 IN A 142.251.107.104 www.google.com. 162 IN A 142.251.107.106 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::93 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::69 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::68 www.google.com. 162 IN AAAA 2607:f8b0:400c:c32::6a www.google.com. 21462 IN HTTPS 1 . alpn="h2,h3" ;; MSG SIZE rcvd: 276 ``` Fix By: Brad House (@bradh352)
1 year ago
A (default), AAAA, ANY, AXFR, CNAME, HINFO, MX, NAPTR, NS, PTR, SOA, SRV, TXT,
URI, CAA, SVCB, and HTTPS.
tools: refine help (#481) fix invalid help options and documentation typos Fix By: @lifenjoiner
2 years ago
.TP
\fB\-T\fR port
Connect to the specified TCP port of DNS server.
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)
4 years ago
.TP
\fB\-U\fR port
tools: refine help (#481) fix invalid help options and documentation typos Fix By: @lifenjoiner
2 years ago
Connect to the specified UDP port of DNS server.
[adig] Update man-page for the '-x' option (#357) Fix By: Gisle Vanem (@gvanem)
4 years ago
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)
4 years ago
.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)
4 years ago
.br
mailing list: moved to lists.haxx.se
3 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)
4 years ago
.SH "SEE ALSO"
.PP
Remove acountry completely from code, including manpage Since acountry cannot be restored due to nerd.dk being decommissioned, we should completely remove the manpage and source. This also will resolve issue #718. Fixes Issue: #718 Fix By: Brad House (@bradh352)
9 months ago
ahost(1).