pSOSystem System Calls - Read

ioctl pNA+ System Calls
Operation Description
SIOCSIFDSTADDR Sets point-to-point address for the interface.
SIOCGIFDSTADDR Gets point-to-point address for the interface.
SIOCSIFMTU Sets the maximum transmission unit of the NI.
SIOCGIFMTU Gets the maximum transmission unit of the NI.
SIOCSIFNETMASK Sets the network mask.
SIOCGIFNETMASK Gets the network mask.
SIOCSIFFLAGS Sets the interface flags field. If the interface is marked down,
any packets currently routed through the interface are rerouted
or dropped, resulting in a send error condition.
IFF_POLL, IFF_EXTLOOPBACK and IFF_UP flags can be set
by using this call.
SIOCGIFFLAGS Gets interface flags.
SIOCGIFCONF Gets the interface configuration list. When this command is
used, arg must point to an ifconf structure (see below).
The ifc_len field initially should be set to the buffer size
pointed to by ifc_buf. On return, ifc_len has the configuration
list length in bytes.
/*
* Structure used in SIOCGIFCONF request.
* Used to retrieve interface configuration
* for machine (useful for programs that must
* know all accessible networks.)
*/
struct ifconf {
int ifc_len; /* size of associated buffer */
union {
char *ifcu_buf;
struct ifreq *ifcu_req;
} ifc_ifcu;
#define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */
#define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */
};
For all other NI-related operations, arg must point to the following structure:
struct ifreq {
long ifr_ifno; /* Interface number of the NI */
union {
struct sockaddr ifru_addr; /* IP address of the NI */
struct sockaddr ifru_dstaddr; /* Dest addr p-to-p link */
struct sockaddr ifru_broadaddr; /* NI broadcast address */
unsigned long ifru_flags; /* Flags for the NI */
int ifru_mtu; /* Maximum number of
4-24 pSOSystem System Calls