ipsend(1) [netbsd man page]

IPSEND(1)						      General Commands Manual							 IPSEND(1)

NAME

       ipsend - sends IP packets

SYNOPSIS

       ipsend  [  -dITUv ] [ -i <interface> ] [ -f <offset> ] [ -g <gateway> ] [ -m <MTU> ] [ -o <option> ] [ -P <protocol> ] [ -s <source> ] [ -t
       <dest. port> ] [ -w <window> ] <destination> [TCP-flags]

DESCRIPTION

       ipsend can be compiled in two ways.  The first is used to send one-off packets to a destination host, using command line options to specify
       various	attributes  present  in the headers.  The destination must be given as the last command line option, except for when TCP flags are
       specified as a combination of A, S, F, U, P and R, last.

       The other way it may be compiled, with DOSOCKET defined, is to allow an attempt at making a TCP connection using a  with  ipsend  resending
       the SYN packet as per the command line options.

OPTIONS

       -d     enable debugging mode.

       -f <offset>
	      The  -f  allows the IP offset field in the IP header to be set to an arbitrary value, which can be specified in decimal or hexadeci-
	      mal.

       -g <gateway>
	      Specify the hostname of the gateway through which to route packets.  This is required whenever the destination host  isn't  directly
	      attached to the same network as the host from which you're sending.

       -i <interface>
	      Set the interface name to be the name supplied.

       -m <MTU>
	      Specify  the  MTU to be used when sending out packets.  This option allows you to set a fake MTU, allowing the simulation of network
	      interfaces with small MTU's without setting them so.

       -o <option>
	      Specify options to be included at the end of the IP header.  An EOL option is automatically appended and need not be given.   If	an
	      option would also have data associated with it (source as an IP# for a lsrr option), then this will not be initialised.

       -s <source>
	      Set the source address in the packet to that provided - maybe either a hostname or IP#.

       -t <dest.port>
	      Set the destination port for TCP/UDP packets.

       -w <window>
	      Set the window size for TCP packets.

       -I     Set the protocol to ICMP.

       -P <protocol>
	      Set the protocol to the value given.  If the parameter is a name, the name is looked up in the /etc/protocols file.

       -T     Set the protocol to TCP.

       -U     Set the protocol to UDP.

       -v     enable verbose mode.

SEE ALSO

       ipresend(1), iptest(1), bpf(4), protocols(5), ipsend(5)

DIAGNOSTICS

       Needs to be run as root.

BUGS

       If you find any, please send email to me at darrenr@pobox.com

																	 IPSEND(1)

IP(4P)																	    IP(4P)

NAME

       ip - Internet Protocol

SYNOPSIS

       #include <sys/socket.h>
       #include <netinet/in.h>

       s = socket(AF_INET, SOCK_RAW, proto);

DESCRIPTION

       IP is the transport layer protocol used by the Internet protocol family.  Options may be set at the IP level when using higher-level proto-
       cols that are based on IP (such as TCP and UDP).  It may also be accessed through a "raw socket" when developing new protocols, or  special
       purpose applications.

       A single generic option is supported at the IP level, IP_OPTIONS, that may be used to provide IP options to be transmitted in the IP header
       of each outgoing packet.  Options are set with setsockopt(2) and examined with getsockopt(2).  The format of IP options to be sent is  that
       specified  by  the IP protocol specification, with one exception: the list of addresses for Source Route options must include the first-hop
       gateway at the beginning of the list of gateways.  The first-hop gateway address will be extracted  from  the  option  list  and  the  size
       adjusted accordingly before use.  IP options may be used with any socket type in the Internet family.

       Raw IP sockets are connectionless, and are normally used with the sendto and recvfrom calls, though the connect(2) call may also be used to
       fix the destination for future packets (in which case the read(2) or recv(2) and write(2) or send(2) system calls may be used).

       If proto is 0, the default protocol IPPROTO_RAW is used for outgoing packets, and only incoming packets	destined  for  that  protocol  are
       received.  If proto is non-zero, that protocol number will be used on outgoing packets and to filter incoming packets.

       Outgoing  packets automatically have an IP header prepended to them (based on the destination address and the protocol number the socket is
       created with).  Incoming packets are received with IP header and options intact.

DIAGNOSTICS

       A socket operation may fail with one of the following errors returned:

       [EISCONN]      when trying to establish a connection on a socket which already has one, or when trying to send a datagram with the destina-
		      tion address specified and the socket is already connected;

       [ENOTCONN]     when trying to send a datagram, but no destination address is specified, and the socket hasn't been connected;

       [ENOBUFS]      when the system runs out of memory for an internal data structure;

       [EADDRNOTAVAIL]
		      when an attempt is made to create a socket with a network address for which no network interface exists.

       The following errors specific to IP may occur when setting or getting IP options:

       [EINVAL]       An unknown socket option name was given.

       [EINVAL]       The IP option field was improperly formed; an option field was shorter than the minimum value or longer than the option buf-
		      fer provided.

SEE ALSO

       getsockopt(2), send(2), recv(2), intro(4N), icmp(4P), inet(4F)

4.2 Berkeley Distribution					   May 16, 1986 							    IP(4P)