9 #if defined(NMRPFLASH_WINDOWS)
10 #define NMRPFLASH_NETALIAS_PREFIX "net"
16 #if defined(NMRPFLASH_LINUX)
17 #include <linux/if_packet.h>
18 #elif defined (NMRPFLASH_OSX)
19 #include <net/if_dl.h>
24 #define MIN(a, b) ((a) < (b) ? (a) : (b))
31 #ifndef NMRPFLASH_WINDOWS
40 static int x_pcap_findalldevs(pcap_if_t **devs)
42 char errbuf[PCAP_ERRBUF_SIZE];
43 if (pcap_findalldevs(devs, errbuf) != 0) {
44 fprintf(stderr, "%s.\n", errbuf);
51 #ifndef NMRPFLASH_WINDOWS
52 static bool get_hwaddr(uint8_t *hwaddr, const char *intf)
54 struct ifaddrs *ifas, *ifa;
58 if (getifaddrs(&ifas) != 0) {
65 for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
66 if (!strcmp(ifa->ifa_name, intf)) {
67 #ifdef NMRPFLASH_LINUX
68 if (ifa->ifa_addr->sa_family != AF_PACKET) {
71 src = ((struct sockaddr_ll*)ifa->ifa_addr)->sll_addr;
73 if (ifa->ifa_addr->sa_family != AF_LINK) {
76 src = LLADDR((struct sockaddr_dl*)ifa->ifa_addr);
78 memcpy(hwaddr, src, 6);
89 void win_perror2(const char *msg, DWORD err)
92 FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
93 FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
94 NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
95 (LPTSTR)&buf, 0, NULL);
98 fprintf(stderr, "%s: %s (%d)\n", msg, buf, (int)err);
101 fprintf(stderr, "%s: error %d\n", msg, (int)err);
105 static bool get_hwaddr(uint8_t *hwaddr, const char *intf)
107 PIP_ADAPTER_INFO adapters, adapter;
112 if ((ret = GetAdaptersInfo(NULL, &bufLen)) != ERROR_BUFFER_OVERFLOW) {
113 win_perror2("GetAdaptersInfo", ret);
117 adapters = malloc(bufLen);
123 if ((ret = GetAdaptersInfo(adapters, &bufLen) == NO_ERROR)) {
124 for (adapter = adapters; adapter; adapter = adapter->Next) {
125 if (adapter->Type != MIB_IF_TYPE_ETHERNET) {
129 #ifndef NMRPFLASH_WINDOWS
130 if (!strcmp(intf, adapter->AdapterName))
132 /* Interface names from WinPcap are "\Device\NPF_{GUID}", while
133 * AdapterName from GetAdaptersInfo is just "{GUID}".*/
134 if (strstr(intf, adapter->AdapterName))
137 if (adapter->AddressLength == 6) {
138 for (i = 0; i != 6; ++i) {
139 hwaddr[i] = adapter->Address[i];
148 win_perror2("GetAdaptersInfo", ret);
155 static const char *intf_alias_to_wpcap(const char *intf)
157 static char buf[128];
158 pcap_if_t *devs, *dev;
159 unsigned i = 0, dev_num = 0;
161 if (intf[0] == '\\') {
163 } else if (sscanf(intf, NMRPFLASH_NETALIAS_PREFIX "%u", &dev_num) != 1) {
164 fprintf(stderr, "Invalid interface alias.\n");
168 if (x_pcap_findalldevs(&devs) != 0) {
172 for (dev = devs; dev; dev = dev->next) {
175 printf("%s%u: %s\n", NMRPFLASH_NETALIAS_PREFIX, i, dev->name);
177 strncpy(buf, dev->name, sizeof(buf) - 1);
178 buf[sizeof(buf) - 1] = '\0';
183 pcap_freealldevs(devs);
186 fprintf(stderr, "Interface alias not found.\n");
193 static const char *intf_get_pretty_name(const char *intf)
195 static char buf[512];
201 guid = strstr(intf, "NPF_{");
208 snprintf(buf, sizeof(buf),
209 "System\\CurrentControlSet\\Control\\Network\\"
210 "{4D36E972-E325-11CE-BFC1-08002BE10318}\\"
211 "%s\\Connection", guid);
212 err = RegOpenKeyExA(HKEY_LOCAL_MACHINE, buf, 0, KEY_READ, &hkey);
213 if (err != ERROR_SUCCESS) {
214 win_perror2("RegOpenKeyExA", err);
219 err = RegQueryValueExA(hkey, "Name", NULL, NULL, (LPBYTE)buf, &len);
220 if (err == ERROR_SUCCESS) {
223 win_perror2("RegQueryValueExA", err);
233 inline uint8_t *ethsock_get_hwaddr(struct ethsock *sock)
238 struct ethsock *ethsock_create(const char *intf, uint16_t protocol)
240 char buf[PCAP_ERRBUF_SIZE];
241 struct bpf_program fp;
242 struct ethsock *sock;
245 sock = malloc(sizeof(struct ethsock));
251 #ifdef NMRPFLASH_WINDOWS
252 intf = intf_alias_to_wpcap(intf);
260 sock->pcap = pcap_open_live(intf, BUFSIZ, 1, 1, buf);
262 fprintf(stderr, "%s.\n", buf);
267 fprintf(stderr, "Warning: %s.\n", buf);
270 if (pcap_datalink(sock->pcap) != DLT_EN10MB) {
271 fprintf(stderr, "%s is not an ethernet interface.\n",
276 if (!get_hwaddr(sock->hwaddr, intf)) {
277 fprintf(stderr, "Failed to get MAC address of interface.\n");
281 #ifndef NMRPFLASH_WINDOWS
282 sock->fd = pcap_get_selectable_fd(sock->pcap);
283 if (sock->fd == -1) {
284 fprintf(stderr, "No selectable file descriptor available.\n");
288 sock->handle = pcap_getevent(sock->pcap);
290 fprintf(stderr, "No event handle available.\n");
295 snprintf(buf, sizeof(buf), "ether proto %04x", protocol);
296 err = pcap_compile(sock->pcap, &fp, buf, 0, 0);
298 pcap_perror(sock->pcap, "pcap_compile");
302 if ((err = pcap_setfilter(sock->pcap, &fp))) {
303 pcap_perror(sock->pcap, "pcap_setfilter");
310 pcap_close(sock->pcap);
316 int select_fd(int fd, unsigned timeout)
325 tv.tv_sec = timeout / 1000;
326 tv.tv_usec = 1000 * (timeout % 1000);
328 status = select(fd + 1, &fds, NULL, NULL, &tv);
330 sock_perror("select");
336 ssize_t ethsock_recv(struct ethsock *sock, void *buf, size_t len)
338 struct pcap_pkthdr* hdr;
339 const u_char *capbuf;
341 #ifdef NMRPFLASH_WINDOWS
345 ret = WaitForSingleObject(sock->handle, sock->timeout);
346 if (ret == WAIT_TIMEOUT) {
348 } else if (ret != WAIT_OBJECT_0) {
349 win_perror2("WaitForSingleObject", ret);
355 status = select_fd(sock->fd, sock->timeout);
358 } else if (status == 0) {
364 status = pcap_next_ex(sock->pcap, &hdr, &capbuf);
367 memcpy(buf, capbuf, MIN(len, hdr->caplen));
372 pcap_perror(sock->pcap, "pcap_next_ex");
375 fprintf(stderr, "pcap_next_ex: returned %d.\n", status);
380 int ethsock_send(struct ethsock *sock, void *buf, size_t len)
382 #ifdef NMRPFLASH_WINDOWS
383 if (pcap_sendpacket(sock->pcap, buf, len) == 0) {
386 pcap_perror(sock->pcap, "pcap_sendpacket");
390 if (pcap_inject(sock->pcap, buf, len) == len) {
393 pcap_perror(sock->pcap, "pcap_inject");
399 int ethsock_close(struct ethsock *sock)
401 pcap_close(sock->pcap);
406 inline int ethsock_set_timeout(struct ethsock *sock, unsigned msec)
408 sock->timeout = msec;
412 static bool is_ethernet(const char *intf)
415 char errbuf[PCAP_ERRBUF_SIZE];
418 if ((pcap = pcap_create(intf, errbuf))) {
419 if (pcap_activate(pcap) == 0) {
420 ret = (pcap_datalink(pcap) == DLT_EN10MB);
428 int ethsock_list_all(void)
430 pcap_if_t *devs, *dev;
433 unsigned dev_num = 0;
434 #ifdef NMRPFLASH_WINDOWS
438 if (x_pcap_findalldevs(&devs) != 0) {
442 memset(hwaddr, 0, 6);
444 for (dev = devs; dev; dev = dev->next) {
445 if (!is_ethernet(dev->name)) {
447 printf("%s (not an ethernet device)\n",
453 if (!get_hwaddr(hwaddr, dev->name)) {
455 printf("%s (failed to get hardware address)\n",
461 #ifndef NMRPFLASH_WINDOWS
462 printf("%s", dev->name);
465 printf("%s%u", NMRPFLASH_NETALIAS_PREFIX, dev_num);
467 printf("%s", dev->name);
471 for (addr = dev->addresses; addr; addr = addr->next) {
472 if (addr->addr->sa_family == AF_INET) {
474 inet_ntoa(((struct sockaddr_in*)addr->addr)->sin_addr));
483 printf(" %02x:%02x:%02x:%02x:%02x:%02x", hwaddr[0], hwaddr[1],
484 hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
486 #ifdef NMRPFLASH_WINDOWS
487 pretty = intf_get_pretty_name(dev->name);
489 printf(" (%s)", pretty);
490 } else if (dev->description) {
491 printf(" (%s)", dev->description);
500 printf("No suitable network interfaces found.\n");