/**
* Open a network adapter and set it up for packet input
*
* @param adapter_num the index of the adapter to use
* @param arg argument to pass to input
* @return an adapter handle on success, NULL on failure
*/
static struct pcapif_private*
pcapif_init_adapter(int adapter_num, void *arg)
{
int i;
int number_of_adapters;
struct pcapif_private *pa;
char errbuf[PCAP_ERRBUF_SIZE+1];
pcap_if_t *alldevs;
pcap_if_t *d;
pcap_if_t *used_adapter = NULL;
pa = (struct pcapif_private *)malloc(sizeof(struct pcapif_private));
if (!pa) {
printf("Unable to alloc the adapter!\n");
return NULL;
}
memset(pa, 0, sizeof(struct pcapif_private));
pa->input_fn_arg = arg;
/* Retrieve the interfaces list */
if (pcap_findalldevs(&alldevs, errbuf) == -1) {
free(pa);
return NULL; /* no adapters found */
}
/* get number of adatpers and adapter pointer */
for (d = alldevs, number_of_adapters = 0; d != NULL; d = d->next, number_of_adapters++) {
if (number_of_adapters == adapter_num) {
char *desc = d->description;
size_t len;
len = strlen(d->name);
LWIP_ASSERT("len < ADAPTER_NAME_LEN", len < ADAPTER_NAME_LEN);
strcpy(pa->name, d->name);
used_adapter = d;
/* format vendor description */
if (desc != NULL) {
len = strlen(desc);
if (strstr(desc, " ' on local host") != NULL) {
len -= 16;
}
else if (strstr(desc, "' on local host") != NULL) {
len -= 15;
}
if (strstr(desc, "Network adapter '") == desc) {
len -= 17;
desc += 17;
}
len = LWIP_MIN(len, ADAPTER_DESC_LEN-1);
strncpy(pa->description, desc, len);
pa->description[len] = 0;
} else {
strcpy(pa->description, "<no_desc>");
}
}
}
#ifndef PCAPIF_LIB_QUIET
/* Scan the list printing every entry */
for (d = alldevs, i = 0; d != NULL; d = d->next, i++) {
char *desc = d->description;
char descBuf[128];
size_t len;
const char* devname = d->name;;
if (d->name == NULL) {
devname = "<unnamed>";
} else {
if (strstr(devname, "\\Device\\") == devname) {
/* windows: strip the first part */
devname += 8;
}
}
printf("%2i: %s\n", i, devname);
if (desc != NULL) {
/* format vendor description */
len = strlen(desc);
if (strstr(desc, " ' on local host") != NULL) {
len -= 16;
}
else if (strstr(desc, "' on local host") != NULL) {
len -= 15;
}
if (strstr(desc, "Network adapter '") == desc) {
len -= 17;
desc += 17;
}
len = LWIP_MIN(len, 127);
strncpy(descBuf, desc, len);
descBuf[len] = 0;
printf(" Desc: \"%s\"\n", descBuf);
}
}
#endif /* PCAPIF_LIB_QUIET */
/* invalid adapter index -> check this after printing the adapters */
if (adapter_num < 0) {
printf("Invalid adapter_num: %d\n", adapter_num);
free(pa);
pcap_freealldevs(alldevs);
return NULL;
}
/* adapter index out of range */
if (adapter_num >= number_of_adapters) {
printf("Invalid adapter_num: %d\n", adapter_num);
free(pa);
pcap_freealldevs(alldevs);
return NULL;
}
#ifndef PCAPIF_LIB_QUIET
printf("Using adapter_num: %d\n", adapter_num);
#endif /* PCAPIF_LIB_QUIET */
/* set up the selected adapter */
LWIP_ASSERT("used_adapter != NULL", used_adapter != NULL);
/* Open the device */
pa->adapter = pcap_open_live(used_adapter->name,/* name of the device */
65536, /* portion of the packet to capture */
/* 65536 guarantees that the whole packet will be captured on all the link layers */
PCAP_OPENFLAG_PROMISCUOUS,/* promiscuous mode */
#if PCAPIF_RX_USE_THREAD
/*-*/1, /* don't wait at all for lower latency */
#else
1, /* wait 1 ms in ethernetif_poll */
#endif
errbuf); /* error buffer */
if (pa->adapter == NULL) {
printf("\nUnable to open the adapter. %s is not supported by WinPcap\n", d->name);
/* Free the device list */
pcap_freealldevs(alldevs);
free(pa);
return NULL;
}
printf("Using adapter: \"%s\"\n", pa->description);
pcap_freealldevs(alldevs);
#if PCAPIF_HANDLE_LINKSTATE
pa->link_state = pcapifh_linkstate_init(pa->name);
pa->last_link_event = PCAPIF_LINKEVENT_UNKNOWN;
#endif /* PCAPIF_HANDLE_LINKSTATE */
return pa;
}
/**
* Open a network adapter and set it up for packet input
*
* @param adapter_num the index of the adapter to use
* @param arg argument to pass to input
* @return an adapter handle on success, NULL on failure
*/
static struct pcapif_private*
pcapif_init_adapter(int adapter_num, void *arg)
{
int i;
int number_of_adapters;
struct pcapif_private *pa;
char errbuf[PCAP_ERRBUF_SIZE+1];
pcap_if_t *alldevs;
pcap_if_t *d;
pcap_if_t *used_adapter = NULL;
pa = (struct pcapif_private *)malloc(sizeof(struct pcapif_private));
if (!pa) {
printf("Unable to alloc the adapter!\n");
return NULL;
}
memset(pa, 0, sizeof(struct pcapif_private));
pcapif_init_tx_packets(pa);
pa->input_fn_arg = arg;
/* Retrieve the interfaces list */
if (pcap_findalldevs(&alldevs, errbuf) == -1) {
free(pa);
return NULL; /* no adapters found */
}
/* get number of adapters and adapter pointer */
for (d = alldevs, number_of_adapters = 0; d != NULL; d = d->next, number_of_adapters++) {
if (number_of_adapters == adapter_num) {
char *desc = d->description;
size_t len;
len = strlen(d->name);
LWIP_ASSERT("len < ADAPTER_NAME_LEN", len < ADAPTER_NAME_LEN);
strcpy(pa->name, d->name);
used_adapter = d;
/* format vendor description */
if (desc != NULL) {
len = strlen(desc);
if (strstr(desc, " ' on local host") != NULL) {
len -= 16;
}
else if (strstr(desc, "' on local host") != NULL) {
len -= 15;
}
if (strstr(desc, "Network adapter '") == desc) {
len -= 17;
desc += 17;
}
len = LWIP_MIN(len, ADAPTER_DESC_LEN-1);
while ((desc[len-1] == ' ') || (desc[len-1] == '\t')) {
/* don't copy trailing whitespace */
len--;
}
strncpy(pa->description, desc, len);
pa->description[len] = 0;
} else {
strcpy(pa->description, "<no_desc>");
}
}
}
#ifndef PCAPIF_LIB_QUIET
/* Scan the list printing every entry */
for (d = alldevs, i = 0; d != NULL; d = d->next, i++) {
char *desc = d->description;
char descBuf[128];
size_t len;
const char* devname = d->name;
if (d->name == NULL) {
devname = "<unnamed>";
} else {
if (strstr(devname, "\\Device\\") == devname) {
/* windows: strip the first part */
devname += 8;
}
}
printf("%2i: %s\n", i, devname);
if (desc != NULL) {
/* format vendor description */
len = strlen(desc);
if (strstr(desc, " ' on local host") != NULL) {
len -= 16;
}
else if (strstr(desc, "' on local host") != NULL) {
len -= 15;
}
if (strstr(desc, "Network adapter '") == desc) {
len -= 17;
desc += 17;
}
len = LWIP_MIN(len, 127);
while ((desc[len-1] == ' ') || (desc[len-1] == '\t')) {
/* don't copy trailing whitespace */
len--;
}
strncpy(descBuf, desc, len);
descBuf[len] = 0;
printf(" Desc: \"%s\"\n", descBuf);
}
}
#endif /* PCAPIF_LIB_QUIET */
/* invalid adapter index -> check this after printing the adapters */
if (adapter_num < 0) {
printf("Invalid adapter_num: %d\n", adapter_num);
free(pa);
pcap_freealldevs(alldevs);
return NULL;
}
/* adapter index out of range */
if (adapter_num >= number_of_adapters) {
printf("Invalid adapter_num: %d\n", adapter_num);
free(pa);
pcap_freealldevs(alldevs);
return NULL;
}
#ifndef PCAPIF_LIB_QUIET
printf("Using adapter_num: %d\n", adapter_num);
#endif /* PCAPIF_LIB_QUIET */
/* set up the selected adapter */
LWIP_ASSERT("used_adapter != NULL", used_adapter != NULL);
/* Open the device */
pa->adapter = pcapif_open_adapter(used_adapter->name, errbuf);
if (pa->adapter == NULL) {
printf("\nUnable to open the adapter. %s is not supported by pcap (\"%s\").\n", used_adapter->name, errbuf);
/* Free the device list */
pcap_freealldevs(alldevs);
free(pa);
return NULL;
}
printf("Using adapter: \"%s\"\n", pa->description);
pcap_freealldevs(alldevs);
#if PCAPIF_HANDLE_LINKSTATE
pa->link_state = pcapifh_linkstate_init(pa->name);
pa->last_link_event = PCAPIF_LINKEVENT_UNKNOWN;
#endif /* PCAPIF_HANDLE_LINKSTATE */
return pa;
}
