ip(2) [plan9 man page]

IP(2)								System Calls Manual							     IP(2)

NAME

       eipconv, parseip, parseether, myipaddr, myetheraddr, maskip, equivip - Internet protocol

SYNOPSIS

       #include <u.h>
       #include <libc.h>
       #include <ip.h>

       int  eipconv(void *o, int f1, int f2, int f3, int chr)

       int  parseip(uchar *ipaddr, char *str)

       int  parseether(uchar *eaddr, char *str)

       int  myipaddr(uchar *ipaddr, char *net)

       int  myetheraddr(uchar *eaddr, char *net)

       void maskip(uchar *from, uchar *mask, uchar *to)

       int  equivip(uchar *ipaddr1, uchar *ipaddr2)

DESCRIPTION

       These routines are used by Internet Protocol (IP) programs to manipulate IP and Ethernet addresses.  IP addresses are stored as a string of
       4 unsigned chars, Ethernet addresses as 6 unsigned chars.  The string representation of IP addresses is (up to) 4 decimal integers  from  0
       to 255 separated by periods.  The string representation of Ethernet addresses is exactly 12 hexadecimal digits.

       Eipconv is a print(2) formatter for Ethernet (verb E) and Internet protocol (verb I) addresses.

       Parseip	converts  a  string  pointed  to by str to a 4-byte IP address starting at ipaddr.  Myipaddr reads the IP address string from file
       /net/1/local and parses it into ipaddr.	Both routines return a negative number on errors.

       Parseether converts a string pointed to by str to a 6 byte Ethernet address starting at eaddr.	Myetheraddr  reads  the  Ethernet  address
       string from file net/1/stats and parses it into eaddr.  Both routines return a negative number on errors.

       Maskip places the bit-wise AND of the IP addresses pointed to by its first two arguments into the buffer pointed to by the third.

       Equivip returns non-zero if the IP addresses pointed to by its two arguments are equal.

SOURCE

       /sys/src/libip

SEE ALSO

       print(2)

																	     IP(2)

Check Out this Related Man Page

ARP(3)							     Library Functions Manual							    ARP(3)

NAME

       arp - Internet Address Resolution Protocol

SYNOPSIS

       bind -a #a /net/arp

       /net/arp/ctl
       /net/arp/data
       /net/arp/stats

DESCRIPTION

       The  arp  device  provides  the	means by which the kernel resolves IP addresses into Ethernet addresses.  A cache is maintained by the arp
       device to speed the process.

       The ctl file controls the ARP cache maintained by the kernel.  The flush control message invalidates all entries in the cache.  The  delete
       ipaddr control message invalidates a single cache entry.  All IP addresses passed to the system are in the canonical textual form described
       in ip(2).  The perm ipaddr control message makes an existing cache entry permanent.

       When the kernel boots, ipconfig sets up the IP stream and arpd opens #a/arp/data (see ipconfig(8)).  This establishes  the  ARP	cache  and
       enables	arpd to receive all ARP packets from the network, which it uses to maintain the cache by writing the results of address resolution
       requests back into the cache.  The IP stream module uses the cache to translate IP addresses.

       Subsequent opens of the data file allow the contents of the cache to be examined.  Each cache entry consists of an IP address, an  Ethernet
       address,  and  the  status  of  the entry.  Entries may be invalid, permanent, or temporary.  Permanent entries will never be aged from the
       cache.  Temporary entries may be replaced by new addresses entered by the ARP server.

       The file stats reports the cache performance.

SEE ALSO

       ip(3), ipconfig(8)

SOURCE

       /sys/src/9/port/devarp.c

																	    ARP(3)

Linux and UNIX Man Pages

ip(2) [plan9 man page]

Check Out this Related Man Page