getprotobynumber

(PHP 4, PHP 5, PHP 7, PHP 8)

getprotobynumber — Get protocol name associated with protocol number

说明

getprotobynumber ( int $protocol ) : string|false

getprotobynumber() returns the protocol name associated with protocol protocol as per /etc/protocols.

参数

protocol: The protocol number.

返回值

Returns the protocol name as a string, 或者在失败时返回 false.

参见

getprotobyname() - Get protocol number associated with protocol name

User Contributed Notes

i at tiankonguse dot com 27-Nov-2013 11:37


getprotobynumber()

=====================

getprotobynumber() gets the protocol name for the given protocol number on the local system.



 If the protocol number is not recognized,the function returns FALSE.



The given code snippet gives the list of protocols along with their protocol numbers



=====================

code



<?

$format = "number <---> protocol\n<br />";

$format = "%6s <---> %s\n<br />";

for($number = 0; $number < 255; $number ++) {

    if (getprotobynumber ( $number ))

        

        printf ( $format, " $number", getprotobynumber ( $number ) );

}

?>



=====================

OUTPUT:

0 <---> ip 

1 <---> icmp 

2 <---> igmp 

3 <---> ggp 

4 <---> ipencap 

5 <---> st 

6 <---> tcp 

8 <---> egp 

9 <---> igp 

12 <---> pup 

17 <---> udp 

20 <---> hmp 

22 <---> xns-idp 

27 <---> rdp 

29 <---> iso-tp4 

33 <---> dccp 

36 <---> xtp 

37 <---> ddp 

38 <---> idpr-cmtp 

41 <---> ipv6 

43 <---> ipv6-route 

44 <---> ipv6-frag 

45 <---> idrp 

46 <---> rsvp 

47 <---> gre 

50 <---> esp 

51 <---> ah 

57 <---> skip 

58 <---> ipv6-icmp 

59 <---> ipv6-nonxt 

60 <---> ipv6-opts 

73 <---> rspf 

81 <---> vmtp 

88 <---> eigrp 

89 <---> ospf 

93 <---> ax.25 

94 <---> ipip 

97 <---> etherip 

98 <---> encap 

103 <---> pim 

108 <---> ipcomp 

112 <---> vrrp 

115 <---> l2tp 

124 <---> isis 

132 <---> sctp 

133 <---> fc 

135 <---> mobility-header 

136 <---> udplite 

137 <---> mpls-in-ip 

138 <---> manet 

139 <---> hip 

140 <---> shim6 

141 <---> wesp 

142 <---> rohc

recycling dot sp dot am at gmail dot com 13-Sep-2010 03:40


Note that by the time of writing this note (5.3.3), there seems to be only two defined constants for the protocol numbers: SOL_UDP and SOL_TCP. 

For all other protocols (like ICMP,... ) you'll have to provide the exact number (EG: 1 for ICMP, ... )

<?php

    echo getprotobynumber(SOL_TCP) . "\n"; // prints tcp

    echo getprotobynumber(SOL_UDP) . "\n"; // prints udp

    var_dump(getprotobyname('tcp') == SOL_TCP); // bool(true)

    var_dump(getprotobyname('udp') == SOL_UDP); // bool(true)

?>

On a UNIX system (don't know if this is true for Windows), the php functions getprotobyname and getprotobynumber are just wrapper for their corresponding system calls. These functions returns the protocol name or protocol number based on the definition from IANA. If you are looking for a protocol and you don't know its number, you can find the exact protocol number here: http://www.iana.org/assignments/protocol-numbers

Vipindas K.S 08-May-2008 08:39


getprotobynumber()

=====================

getprotobynumber() gets the protocol name for the given protocol number on the local system. If the protocol number is not recognized,the function returns FALSE.The given code snippet gives the list of protocols along with their protocol numbers



<?

$format = "%6s %s\n<br />";

for ($number = 0; $number < 255; $number++)

 {

   if (getprotobynumber ($number))



      printf ($format, " $number-->", getprotobynumber ($number));

 }



?>



OUTPUT:



0--> ip 

1--> icmp 

3--> ggp 

6--> tcp 

8--> egp 

12--> pup 

17--> udp 

20--> hmp 

22--> xns-idp 

27--> rdp 

66--> rvd