104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/**
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* pcapif_helper.c - This file is part of lwIP pcapif and provides helper functions
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* for managing the link state.
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*/
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#include "pcapif_helper.h"
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef WIN32
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#ifdef _MSC_VER
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#pragma warning (disable: 4201) /* don't warn about union without name */
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#endif /* _MSC_VER */
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <packet32.h>
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#include <ntddndis.h>
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struct pcapifh_linkstate {
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LPADAPTER lpAdapter;
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PPACKET_OID_DATA ppacket_oid_data;
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};
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struct pcapifh_linkstate* pcapifh_linkstate_init(const char *adapter_name)
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{
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struct pcapifh_linkstate* state = (struct pcapifh_linkstate*)malloc(sizeof(struct pcapifh_linkstate));
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if (state != NULL) {
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memset(state, 0, sizeof(struct pcapifh_linkstate));
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state->ppacket_oid_data = (PPACKET_OID_DATA)malloc(sizeof(PACKET_OID_DATA) + sizeof(NDIS_MEDIA_STATE));
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if (state->ppacket_oid_data == NULL) {
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free(state);
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state = NULL;
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} else {
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state->lpAdapter = PacketOpenAdapter((char*)adapter_name);
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if ((state->lpAdapter == NULL) || (state->lpAdapter->hFile == INVALID_HANDLE_VALUE)) {
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/* failed to open adapter */
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free(state);
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state = NULL;
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}
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}
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}
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return state;
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}
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enum pcapifh_link_event pcapifh_linkstate_get(struct pcapifh_linkstate* state)
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{
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enum pcapifh_link_event ret = PCAPIF_LINKEVENT_UNKNOWN;
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if (state != NULL) {
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state->ppacket_oid_data->Oid = OID_GEN_MEDIA_CONNECT_STATUS;
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state->ppacket_oid_data->Length = sizeof(NDIS_MEDIA_STATE);
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if (PacketRequest(state->lpAdapter, FALSE, state->ppacket_oid_data)) {
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NDIS_MEDIA_STATE fNdisMediaState;
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fNdisMediaState = (*((PNDIS_MEDIA_STATE)(state->ppacket_oid_data->Data)));
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ret = ((fNdisMediaState == NdisMediaStateConnected) ? PCAPIF_LINKEVENT_UP : PCAPIF_LINKEVENT_DOWN);
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}
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}
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return ret;
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}
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void pcapifh_linkstate_close(struct pcapifh_linkstate* state)
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{
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if (state != NULL) {
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if (state->lpAdapter != NULL) {
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PacketCloseAdapter(state->lpAdapter);
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}
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if (state->ppacket_oid_data != NULL) {
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free(state->ppacket_oid_data);
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}
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free(state);
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}
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}
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#else /* WIN32 */
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/* @todo: add linux/unix implementation? */
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struct pcapifh_linkstate {
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u8_t empty;
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};
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struct pcapifh_linkstate* pcapifh_linkstate_init(const char *adapter_name)
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{
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LWIP_UNUSED_ARG(adapter_name);
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return NULL;
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}
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enum pcapifh_link_event pcapifh_linkstate_get(struct pcapifh_linkstate* state)
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{
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LWIP_UNUSED_ARG(state);
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LWIP_ASSERT("not implemented", 0);
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return LINKEVENT_UNKNOWN;
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}
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void pcapifh_linkstate_close(struct pcapifh_linkstate* state)
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{
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LWIP_UNUSED_ARG(state);
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LWIP_ASSERT("not implemented", 0);
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}
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#endif /* WIN32 */ |