8 #if defined(NMRPFLASH_WINDOWS)
9 #define NMRPFLASH_NETALIAS_PREFIX "net"
15 #if defined(NMRPFLASH_LINUX)
16 #define NMRPFLASH_AF_PACKET AF_PACKET
17 #include <linux/if_packet.h>
19 #define NMRPFLASH_AF_PACKET AF_LINK
20 #include <net/if_types.h>
25 #define MIN(a, b) ((a) < (b) ? (a) : (b))
32 #ifndef NMRPFLASH_WINDOWS
41 const char *mac_to_str(uint8_t *mac)
44 snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
45 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
49 static int x_pcap_findalldevs(pcap_if_t **devs)
51 char errbuf[PCAP_ERRBUF_SIZE];
52 if (pcap_findalldevs(devs, errbuf) != 0) {
53 fprintf(stderr, "%s.\n", errbuf);
60 #ifndef NMRPFLASH_WINDOWS
61 static inline bool sockaddr_get_hwaddr(struct sockaddr *sa, uint8_t *hwaddr)
65 if (sa->sa_family != NMRPFLASH_AF_PACKET) {
69 #ifndef NMRPFLASH_LINUX
70 if (((struct sockaddr_dl*)sa)->sdl_type != IFT_ETHER) {
73 src = LLADDR((struct sockaddr_dl*)sa);
75 src = ((struct sockaddr_ll*)sa)->sll_addr;
78 memcpy(hwaddr, src, 6);
82 static bool get_hwaddr_from_intf(const char *intf, uint8_t *hwaddr)
84 struct ifaddrs *ifas, *ifa;
87 if (getifaddrs(&ifas) != 0) {
94 for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
95 if (!strcmp(ifa->ifa_name, intf)) {
96 if (sockaddr_get_hwaddr(ifa->ifa_addr, hwaddr)) {
109 void win_perror2(const char *msg, DWORD err)
112 FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
113 FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
114 NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
115 (LPTSTR)&buf, 0, NULL);
118 /* FormatMessageA terminates buf with CRLF! */
119 fprintf(stderr, "%s: %s", msg, buf);
122 fprintf(stderr, "%s: error %d\n", msg, (int)err);
126 static bool get_hwaddr_from_intf(const char *intf, uint8_t *hwaddr)
128 PIP_ADAPTER_INFO adapters, adapter;
133 if ((ret = GetAdaptersInfo(NULL, &bufLen)) != ERROR_BUFFER_OVERFLOW) {
134 win_perror2("GetAdaptersInfo", ret);
138 adapters = malloc(bufLen);
144 if ((ret = GetAdaptersInfo(adapters, &bufLen) == NO_ERROR)) {
145 for (adapter = adapters; adapter; adapter = adapter->Next) {
146 if (adapter->Type != MIB_IF_TYPE_ETHERNET) {
150 /* Interface names from WinPcap are "\Device\NPF_{GUID}", while
151 * AdapterName from GetAdaptersInfo is just "{GUID}".*/
152 if (strstr(intf, adapter->AdapterName)) {
153 if (adapter->AddressLength == 6) {
154 for (i = 0; i != 6; ++i) {
155 hwaddr[i] = adapter->Address[i];
164 win_perror2("GetAdaptersInfo", ret);
171 static const char *intf_alias_to_wpcap(const char *intf)
173 static char buf[128];
174 pcap_if_t *devs, *dev;
175 unsigned i = 0, dev_num = 0;
177 if (intf[0] == '\\') {
179 } else if (sscanf(intf, NMRPFLASH_NETALIAS_PREFIX "%u", &dev_num) != 1) {
180 fprintf(stderr, "Invalid interface alias.\n");
184 if (x_pcap_findalldevs(&devs) != 0) {
188 for (dev = devs; dev; dev = dev->next, ++i) {
191 printf("%s%u: %s\n", NMRPFLASH_NETALIAS_PREFIX, i, dev->name);
193 strncpy(buf, dev->name, sizeof(buf) - 1);
194 buf[sizeof(buf) - 1] = '\0';
199 pcap_freealldevs(devs);
202 fprintf(stderr, "Interface alias not found.\n");
209 static const char *intf_get_pretty_name(const char *intf)
211 static char buf[512];
217 guid = strstr(intf, "NPF_{");
224 snprintf(buf, sizeof(buf),
225 "System\\CurrentControlSet\\Control\\Network\\"
226 "{4D36E972-E325-11CE-BFC1-08002BE10318}\\"
227 "%s\\Connection", guid);
228 err = RegOpenKeyExA(HKEY_LOCAL_MACHINE, buf, 0, KEY_READ, &hkey);
229 if (err != ERROR_SUCCESS) {
231 win_perror2("RegOpenKeyExA", err);
237 err = RegQueryValueExA(hkey, "Name", NULL, NULL, (LPBYTE)buf, &len);
238 if (err == ERROR_SUCCESS) {
242 win_perror2("RegQueryValueExA", err);
252 inline uint8_t *ethsock_get_hwaddr(struct ethsock *sock)
257 struct ethsock *ethsock_create(const char *intf, uint16_t protocol)
259 char buf[PCAP_ERRBUF_SIZE];
260 struct bpf_program fp;
261 struct ethsock *sock;
264 sock = malloc(sizeof(struct ethsock));
270 #ifdef NMRPFLASH_WINDOWS
271 intf = intf_alias_to_wpcap(intf);
279 sock->pcap = pcap_open_live(intf, BUFSIZ, 1, 1, buf);
281 fprintf(stderr, "%s.\n", buf);
286 fprintf(stderr, "Warning: %s.\n", buf);
289 if (pcap_datalink(sock->pcap) != DLT_EN10MB) {
290 fprintf(stderr, "%s is not an ethernet interface.\n",
295 if (!get_hwaddr_from_intf(intf, sock->hwaddr)) {
296 fprintf(stderr, "Failed to get MAC address of interface.\n");
300 #ifndef NMRPFLASH_WINDOWS
301 sock->fd = pcap_get_selectable_fd(sock->pcap);
302 if (sock->fd == -1) {
303 fprintf(stderr, "No selectable file descriptor available.\n");
307 sock->handle = pcap_getevent(sock->pcap);
309 fprintf(stderr, "No event handle available.\n");
313 err = pcap_setmintocopy(sock->pcap, 1);
315 pcap_perror(sock->pcap, "pcap_setmintocopy");
320 snprintf(buf, sizeof(buf), "ether proto 0x%04x and not ether src %s",
321 protocol, mac_to_str(sock->hwaddr));
323 err = pcap_compile(sock->pcap, &fp, buf, 0, 0);
325 pcap_perror(sock->pcap, "pcap_compile");
329 err = pcap_setfilter(sock->pcap, &fp);
333 pcap_perror(sock->pcap, "pcap_setfilter");
340 pcap_close(sock->pcap);
346 int select_fd(int fd, unsigned timeout)
355 tv.tv_sec = timeout / 1000;
356 tv.tv_usec = 1000 * (timeout % 1000);
358 status = select(fd + 1, &fds, NULL, NULL, &tv);
360 sock_perror("select");
366 ssize_t ethsock_recv(struct ethsock *sock, void *buf, size_t len)
368 struct pcap_pkthdr* hdr;
369 const u_char *capbuf;
371 #ifdef NMRPFLASH_WINDOWS
375 ret = WaitForSingleObject(sock->handle, sock->timeout);
376 if (ret == WAIT_TIMEOUT) {
378 } else if (ret != WAIT_OBJECT_0) {
379 win_perror2("WaitForSingleObject", ret);
385 status = select_fd(sock->fd, sock->timeout);
388 } else if (status == 0) {
394 status = pcap_next_ex(sock->pcap, &hdr, &capbuf);
397 memcpy(buf, capbuf, MIN(len, hdr->caplen));
402 pcap_perror(sock->pcap, "pcap_next_ex");
405 fprintf(stderr, "pcap_next_ex: returned %d.\n", status);
410 int ethsock_send(struct ethsock *sock, void *buf, size_t len)
412 #ifdef NMRPFLASH_WINDOWS
413 if (pcap_sendpacket(sock->pcap, buf, len) == 0) {
416 pcap_perror(sock->pcap, "pcap_sendpacket");
420 if (pcap_inject(sock->pcap, buf, len) == len) {
423 pcap_perror(sock->pcap, "pcap_inject");
429 int ethsock_close(struct ethsock *sock)
431 pcap_close(sock->pcap);
436 inline int ethsock_set_timeout(struct ethsock *sock, unsigned msec)
438 sock->timeout = msec;
442 static bool get_hwaddr_from_pcap(const pcap_if_t *dev, uint8_t *hwaddr)
444 #ifndef NMRPFLASH_WINDOWS
448 for (addr = dev->addresses; addr; addr = addr->next) {
450 printf("%s: sa_family=%d, sa_data={ ", dev->name,
451 addr->addr->sa_family);
452 for (i = 0; i != sizeof(addr->addr->sa_data); ++i) {
453 printf("%02x ", addr->addr->sa_data[i] & 0xff);
458 if (sockaddr_get_hwaddr(addr->addr, hwaddr)) {
464 return get_hwaddr_from_intf(dev->name, hwaddr);
467 int ethsock_list_all(void)
469 pcap_if_t *devs, *dev;
472 unsigned dev_num = 0, dev_ok = 0;
473 #ifdef NMRPFLASH_WINDOWS
477 if (x_pcap_findalldevs(&devs) != 0) {
481 memset(hwaddr, 0, 6);
483 for (dev = devs; dev; dev = dev->next, ++dev_num) {
484 if (dev->flags & PCAP_IF_LOOPBACK) {
486 printf("%-15s (loopback device)\n", dev->name);
491 if (!get_hwaddr_from_pcap(dev, hwaddr)) {
493 printf("%-15s (not an ethernet device)\n",
499 #ifndef NMRPFLASH_WINDOWS
500 printf("%-15s", dev->name);
502 /* Call this here so *_perror() calls don't happen within a line */
503 pretty = intf_get_pretty_name(dev->name);
506 printf("%s%u", NMRPFLASH_NETALIAS_PREFIX, dev_num);
508 printf("%s", dev->name);
512 for (addr = dev->addresses; addr; addr = addr->next) {
513 if (addr->addr->sa_family == AF_INET) {
515 inet_ntoa(((struct sockaddr_in*)addr->addr)->sin_addr));
521 printf(" %-15s", "0.0.0.0");
524 printf(" %s", mac_to_str(hwaddr));
526 #ifdef NMRPFLASH_WINDOWS
528 printf(" (%s)", pretty);
529 } else if (dev->description) {
530 printf(" (%s)", dev->description);
539 printf("No suitable network interfaces found.\n");