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cc [ flag ... ] file ... -ldlpi [ library ... ] #include <libdlpi.h> int dlpi_info(dlpi_handle_t dh, dlpi_info_t *infop, uint_t opt);
The dlpi_info() function provides DLPI information about the open DLPI link instance associated with DLPI handle dh. DLPI information can be retrieved in any state of dh, but some of the information might not be available if dh is in the DL_UNBOUND DLPI state. The DLPI information received is copied into infop, which must point to a dlpi_info_t allocated by the caller. The opt argument is reserved for future use and must be set to 0.
The dlpi_info_t is a structure defined in <libdlpi.h> as follows:
typedef struct {
uint_t di_opts;
uint_t di_max_sdu;
uint_t di_min_sdu;
uint_t di_state;
uchar_t di_mactype;
char di_linkname[DLPI_LINKNAME_MAX];
uchar_t di_physaddr[DLPI_PHYSADDR_MAX];
uchar_t di_physaddrlen;
uchar_t di_bcastaddr[DLPI_PHYSADDR_MAX];
uchar_t di_bcastaddrlen;
uint_t di_sap;
int di_timeout;
dl_qos_cl_sel1_t di_qos_sel;
dl_qos_cl_range1_t di_qos_range;
} dlpi_info_t;
di_opts
Reserved for future dlpi_info_t expansion.
di_max_sdu
Maximum message size, in bytes, that the DLPI link is able to accept for transmission. The value is guaranteed to be greater than or equal to di_min_sdu.
di_min_sdu
Minimum message size, in bytes, that the DLPI link is able to accept for transmission. The value is guaranteed to be greater than or equal to one.
di_state
Current DLPI state of dh; either DL_UNBOUND or DL_IDLE.
di_mactype
MAC type supported by the DLPI link associated with dh. See <sys/dlpi.h> for the list of possible MAC types.
di_linkname
Link name associated with DLPI handle dh.
di_physaddr
Link-layer physical address of bound dh. If dh is in the DL_UNBOUND DLPI state, the contents of di_physaddr are unspecified.
di_physaddrlen
Physical address length, in bytes. If dh is in the DL_UNBOUND DLPI state, di_physaddrlen is set to zero.
di_bcastaddr
Link-layer broadcast address. If the di_mactype of the DLPI link does not support broadcast, the contents of di_bcastaddr are unspecified.
di_bcastaddrlen
Link-layer broadcast address length, in bytes. If the di_mactype of the DLPI link does not support broadcast, di_bcastaddrlen is set to zero.
di_sap
SAP currently bound to handle. If dh is in the DL_UNBOUND DLPI state, di_sap is set to zero.
di_timeout
Current timeout value, in seconds, set on the dlpi handle.
di_qos_sel
Current QOS parameters supported by the DLPI link instance associated with dh. Unsupported QOS parameters are set to DL_UNKNOWN.
di_qos_range
Available range of QOS parameters supported by a DLPI link instance associated with the DLPI handle dh. Unsupported QOS range values are set to DL_UNKNOWN.
Upon success, DLPI_SUCCESS is returned. If DL_SYSERR is returned, errno contains the specific UNIX system error value. Otherwise, a DLPI error value defined in <sys/dlpi.h> or an error value listed in the following section is returned.
DLPI_EBADMSG
Bad DLPI message
DLPI_EINHANDLE
Invalid DLPI handle
DLPI_EINVAL
Invalid argument
DLPI_EMODENOTSUP
Unsupported DLPI connection mode
DLPI_ETIMEDOUT
DLPI operation timed out
DLPI_EVERNOTSUP
Unsupported DLPI Version
DLPI_FAILURE
DLPI operation failed
Example 1 Get link-layer broadcast address
The following example shows how dlpi_info() can be used.
#include <libdlpi.h> uchar_t * get_bcastaddr(const char *linkname, uchar_t *baddrlenp) { dlpi_handle_t dh; dlpi_info_t dlinfo; uchar_t *baddr; if (dlpi_open(linkname, &dh, 0) != DLPI_SUCCESS) return (NULL); if (dlpi_info(dh, &dlinfo, 0) != DLPI_SUCCESS) { dlpi_close(dh); return (NULL); } dlpi_close(dh); *baddrlenp = dlinfo.di_bcastaddrlen; if ((baddr = malloc(*baddrlenp)) == NULL) return (NULL); return (memcpy(baddr, dlinfo.di_bcastaddr, *baddrlenp)); }
See attributes(5) for description of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Interface Stability | Committed |
| MT-Level | Safe |
dlpi_bind(3DLPI), libdlpi(3LIB), attributes(5)