Binding the IP address


 
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Special Forums IP Networking Binding the IP address
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Old 07-23-2009
Bug Binding the IP address

hi all,

i have an udp based application that doesn't bind to any particular address.

-->while sneding the packets, i have some doubts....
1) can the packet be transmitted with an source ip address as 0.0.0.0
2) if we select an interface based on destination ip address, and the ip address of the interface should be filled in the ip header.

3) will the remote host transfers the packet with destination ip address field as 0.0.0.0.....

Thanks in advance .....
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bind(3SOCKET)						     Sockets Library Functions						     bind(3SOCKET)

NAME
bind - bind a name to a socket SYNOPSIS
cc [ flag ... ] file ... -lsocket -lnsl [ library ... ] #include <sys/types.h> #include <sys/socket.h> int bind(int s, const struct sockaddr *name, int namelen); DESCRIPTION
bind() assigns a name to an unnamed socket. When a socket is created with socket(3SOCKET), it exists in a name space (address family) but has no name assigned. bind() requests that the name pointed to by name be assigned to the socket. RETURN VALUES
If the bind is successful, 0 is returned. A return value of -1 indicates an error, which is further specified in the global errno. ERRORS
The bind() call will fail if: EACCES The requested address is protected, and {PRIV_NET_PRIVADDR} is not asserted in the effective set of the current process. EADDRINUSE The specified address is already in use. EADDRNOTAVAIL The specified address is not available on the local machine. EBADF s is not a valid descriptor. EINVAL namelen is not the size of a valid address for the specified address family. EINVAL The socket is already bound to an address. ENOSR There were insufficient STREAMS resources for the operation to complete. ENOTSOCK s is a descriptor for a file, not a socket. The following errors are specific to binding names in the UNIX domain: EACCES Search permission is denied for a component of the path prefix of the pathname in name. EIO An I/O error occurred while making the directory entry or allocating the inode. EISDIR A null pathname was specified. ELOOP Too many symbolic links were encountered in translating the pathname in name. ENOENT A component of the path prefix of the pathname in name does not exist. ENOTDIR A component of the path prefix of the pathname in name is not a directory. EROFS The inode would reside on a read-only file system. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO
unlink(2), socket(3SOCKET), attributes(5), privileges(5), socket.h(3HEAD) NOTES
Binding a name in the UNIX domain creates a socket in the file system that must be deleted by the caller when it is no longer needed byus- ing unlink(2). The rules used in name binding vary between communication domains. SunOS 5.10 20 Feb 2003 bind(3SOCKET)