8 #if defined(NMRPFLASH_WINDOWS)
9 #define NMRPFLASH_NETALIAS_PREFIX "net"
13 #include <sys/ioctl.h>
18 #if defined(NMRPFLASH_LINUX)
19 #define NMRPFLASH_AF_PACKET AF_PACKET
20 #include <linux/if_packet.h>
22 #define NMRPFLASH_AF_PACKET AF_LINK
23 #include <net/if_types.h>
31 #ifndef NMRPFLASH_WINDOWS
41 struct ethsock_ip_undo
43 #ifndef NMRPFLASH_WINDOWS
50 const char *mac_to_str(uint8_t *mac)
53 snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
54 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
58 static int x_pcap_findalldevs(pcap_if_t **devs)
60 char errbuf[PCAP_ERRBUF_SIZE];
61 if (pcap_findalldevs(devs, errbuf) != 0) {
62 fprintf(stderr, "%s.\n", errbuf);
69 #ifndef NMRPFLASH_WINDOWS
70 static inline bool sockaddr_get_hwaddr(struct sockaddr *sa, uint8_t *hwaddr)
74 if (sa->sa_family != NMRPFLASH_AF_PACKET) {
78 #ifndef NMRPFLASH_LINUX
79 if (((struct sockaddr_dl*)sa)->sdl_type != IFT_ETHER) {
82 src = LLADDR((struct sockaddr_dl*)sa);
84 src = ((struct sockaddr_ll*)sa)->sll_addr;
87 memcpy(hwaddr, src, 6);
91 static bool get_intf_info(const char *intf, uint8_t *hwaddr, void *dummy)
93 struct ifaddrs *ifas, *ifa;
96 if (getifaddrs(&ifas) != 0) {
103 for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
104 if (!strcmp(ifa->ifa_name, intf)) {
105 if (sockaddr_get_hwaddr(ifa->ifa_addr, hwaddr)) {
118 void win_perror2(const char *msg, DWORD err)
121 FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
122 FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
123 NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
124 (LPTSTR)&buf, 0, NULL);
127 /* FormatMessageA terminates buf with CRLF! */
128 fprintf(stderr, "%s: %s", msg, buf);
131 fprintf(stderr, "%s: error %d\n", msg, (int)err);
135 static bool get_intf_info(const char *intf, uint8_t *hwaddr, DWORD *index)
137 PIP_ADAPTER_INFO adapters, adapter;
142 if ((ret = GetAdaptersInfo(NULL, &bufLen)) != ERROR_BUFFER_OVERFLOW) {
143 win_perror2("GetAdaptersInfo", ret);
147 adapters = malloc(bufLen);
153 if ((ret = GetAdaptersInfo(adapters, &bufLen) == NO_ERROR)) {
154 for (adapter = adapters; adapter; adapter = adapter->Next) {
155 if (adapter->Type != MIB_IF_TYPE_ETHERNET && adapter->Type != IF_TYPE_IEEE80211) {
159 /* Interface names from WinPcap are "\Device\NPF_{GUID}", while
160 * AdapterName from GetAdaptersInfo is just "{GUID}".*/
161 if (strstr(intf, adapter->AdapterName)) {
162 if (adapter->AddressLength == 6) {
163 memcpy(hwaddr, adapter->Address, 6);
165 *index = adapter->Index;
173 win_perror2("GetAdaptersInfo", ret);
180 static const char *intf_alias_to_wpcap(const char *intf)
182 static char buf[128];
183 pcap_if_t *devs, *dev;
184 unsigned i = 0, dev_num = 0;
186 if (intf[0] == '\\') {
188 } else if (sscanf(intf, NMRPFLASH_NETALIAS_PREFIX "%u", &dev_num) != 1) {
189 fprintf(stderr, "Invalid interface alias.\n");
193 if (x_pcap_findalldevs(&devs) != 0) {
197 for (dev = devs; dev; dev = dev->next, ++i) {
200 printf("%s%u: %s\n", NMRPFLASH_NETALIAS_PREFIX, i, dev->name);
202 strncpy(buf, dev->name, sizeof(buf) - 1);
203 buf[sizeof(buf) - 1] = '\0';
208 pcap_freealldevs(devs);
211 fprintf(stderr, "Interface alias not found.\n");
218 static const char *intf_get_pretty_name(const char *intf)
220 static char buf[512];
226 guid = strstr(intf, "NPF_{");
233 snprintf(buf, sizeof(buf),
234 "System\\CurrentControlSet\\Control\\Network\\"
235 "{4D36E972-E325-11CE-BFC1-08002BE10318}\\"
236 "%s\\Connection", guid);
237 err = RegOpenKeyExA(HKEY_LOCAL_MACHINE, buf, 0, KEY_READ, &hkey);
238 if (err != ERROR_SUCCESS) {
240 win_perror2("RegOpenKeyExA", err);
246 err = RegQueryValueExA(hkey, "Name", NULL, NULL, (LPBYTE)buf, &len);
247 if (err == ERROR_SUCCESS) {
251 win_perror2("RegQueryValueExA", err);
261 inline uint8_t *ethsock_get_hwaddr(struct ethsock *sock)
266 struct ethsock *ethsock_create(const char *intf, uint16_t protocol)
268 char buf[PCAP_ERRBUF_SIZE];
269 struct bpf_program fp;
270 struct ethsock *sock;
273 sock = malloc(sizeof(struct ethsock));
279 #ifdef NMRPFLASH_WINDOWS
280 intf = intf_alias_to_wpcap(intf);
289 sock->pcap = pcap_open_live(sock->intf, BUFSIZ, 1, 1, buf);
291 fprintf(stderr, "%s.\n", buf);
296 fprintf(stderr, "Warning: %s.\n", buf);
299 if (pcap_datalink(sock->pcap) != DLT_EN10MB) {
300 fprintf(stderr, "%s is not an ethernet interface.\n",
305 #ifndef NMRPFLASH_WINDOWS
306 err = !get_intf_info(intf, sock->hwaddr, NULL);
308 err = !get_intf_info(intf, sock->hwaddr, &sock->index);
311 fprintf(stderr, "Failed to get interface info.\n");
315 #ifndef NMRPFLASH_WINDOWS
316 sock->fd = pcap_get_selectable_fd(sock->pcap);
317 if (sock->fd == -1) {
318 pcap_perror(sock->pcap, "pcap_get_selectable_fd");
322 sock->handle = pcap_getevent(sock->pcap);
324 pcap_perror(sock->pcap, "pcap_getevent");
328 err = pcap_setmintocopy(sock->pcap, 1);
330 pcap_perror(sock->pcap, "pcap_setmintocopy");
335 snprintf(buf, sizeof(buf), "ether proto 0x%04x and not ether src %s",
336 protocol, mac_to_str(sock->hwaddr));
338 err = pcap_compile(sock->pcap, &fp, buf, 0, 0);
340 pcap_perror(sock->pcap, "pcap_compile");
344 err = pcap_setfilter(sock->pcap, &fp);
348 pcap_perror(sock->pcap, "pcap_setfilter");
355 pcap_close(sock->pcap);
361 int select_fd(int fd, unsigned timeout)
370 tv.tv_sec = timeout / 1000;
371 tv.tv_usec = 1000 * (timeout % 1000);
373 status = select(fd + 1, &fds, NULL, NULL, &tv);
375 sock_perror("select");
381 ssize_t ethsock_recv(struct ethsock *sock, void *buf, size_t len)
383 struct pcap_pkthdr* hdr;
384 const u_char *capbuf;
386 #ifdef NMRPFLASH_WINDOWS
390 ret = WaitForSingleObject(sock->handle, sock->timeout);
391 if (ret == WAIT_TIMEOUT) {
393 } else if (ret != WAIT_OBJECT_0) {
394 win_perror2("WaitForSingleObject", ret);
400 status = select_fd(sock->fd, sock->timeout);
403 } else if (status == 0) {
409 status = pcap_next_ex(sock->pcap, &hdr, &capbuf);
412 memcpy(buf, capbuf, MIN(len, hdr->caplen));
417 pcap_perror(sock->pcap, "pcap_next_ex");
420 fprintf(stderr, "pcap_next_ex: returned %d.\n", status);
425 int ethsock_send(struct ethsock *sock, void *buf, size_t len)
427 #ifdef NMRPFLASH_WINDOWS
428 if (pcap_sendpacket(sock->pcap, buf, len) == 0) {
431 pcap_perror(sock->pcap, "pcap_sendpacket");
435 if (pcap_inject(sock->pcap, buf, len) == len) {
438 pcap_perror(sock->pcap, "pcap_inject");
444 int ethsock_close(struct ethsock *sock)
446 pcap_close(sock->pcap);
451 inline int ethsock_set_timeout(struct ethsock *sock, unsigned msec)
453 sock->timeout = msec;
457 #ifndef NMRPFLASH_WINDOWS
458 int ethsock_arp_add(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr)
463 int ethsock_arp_del(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr)
468 static int ethsock_arp(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr, int add)
472 .dwIndex = sock->index,
474 .dwAddr = ipaddr->s_addr,
475 .dwType = MIB_IPNET_TYPE_STATIC
478 memcpy(arp.bPhysAddr, hwaddr, 6);
481 ret = CreateIpNetEntry(&arp);
482 if (ret != NO_ERROR) {
483 win_perror2("CreateIpNetEntry", ret);
487 DeleteIpNetEntry(&arp);
493 int ethsock_arp_add(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr)
495 ethsock_arp_del(sock, hwaddr, ipaddr);
496 return ethsock_arp(sock, hwaddr, ipaddr, 1);
499 int ethsock_arp_del(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr)
501 return ethsock_arp(sock, hwaddr, ipaddr, 0);
505 static bool get_hwaddr_from_pcap(const pcap_if_t *dev, uint8_t *hwaddr)
507 #ifndef NMRPFLASH_WINDOWS
511 for (addr = dev->addresses; addr; addr = addr->next) {
513 printf("%s: sa_family=%d, sa_data={ ", dev->name,
514 addr->addr->sa_family);
515 for (i = 0; i != sizeof(addr->addr->sa_data); ++i) {
516 printf("%02x ", addr->addr->sa_data[i] & 0xff);
521 if (sockaddr_get_hwaddr(addr->addr, hwaddr)) {
527 return get_intf_info(dev->name, hwaddr, NULL);
530 int ethsock_list_all(void)
532 pcap_if_t *devs, *dev;
535 unsigned dev_num = 0, dev_ok = 0;
536 #ifdef NMRPFLASH_WINDOWS
540 if (x_pcap_findalldevs(&devs) != 0) {
544 memset(hwaddr, 0, 6);
546 for (dev = devs; dev; dev = dev->next, ++dev_num) {
547 if (dev->flags & PCAP_IF_LOOPBACK) {
549 printf("%-15s (loopback device)\n", dev->name);
554 if (!get_hwaddr_from_pcap(dev, hwaddr)) {
556 printf("%-15s (not an ethernet device)\n",
562 #ifndef NMRPFLASH_WINDOWS
563 printf("%-15s", dev->name);
565 /* Call this here so *_perror() calls don't happen within a line */
566 pretty = intf_get_pretty_name(dev->name);
569 printf("%s%u", NMRPFLASH_NETALIAS_PREFIX, dev_num);
571 printf("%s", dev->name);
575 for (addr = dev->addresses; addr; addr = addr->next) {
576 if (addr->addr->sa_family == AF_INET) {
578 inet_ntoa(((struct sockaddr_in*)addr->addr)->sin_addr));
584 printf(" %-15s", "0.0.0.0");
587 printf(" %s", mac_to_str(hwaddr));
589 #ifdef NMRPFLASH_WINDOWS
591 printf(" (%s)", pretty);
592 } else if (dev->description) {
593 printf(" (%s)", dev->description);
602 printf("No suitable network interfaces found.\n");
608 int ethsock_for_each_ip(struct ethsock *sock, ethsock_ip_callback_t callback,
611 struct ethsock_ip_callback_args args;
612 pcap_if_t *devs, *dev;
616 if (x_pcap_findalldevs(&devs) != 0) {
622 for (dev = devs; dev; dev = dev->next) {
623 if (strcmp(sock->intf, dev->name)) {
627 for (addr = dev->addresses; addr; addr = addr->next) {
628 if (addr->addr->sa_family == AF_INET) {
629 args.ipaddr = &((struct sockaddr_in*)addr->addr)->sin_addr;
630 args.ipmask = &((struct sockaddr_in*)addr->netmask)->sin_addr;
632 status = callback(&args);
642 pcap_freealldevs(devs);
644 return status <= 0 ? status : 0;
647 static inline void set_addr(void *p, uint32_t addr)
649 struct sockaddr_in* sin = p;
650 sin->sin_family = AF_INET;
651 sin->sin_addr.s_addr = addr;
654 #ifndef NMRPFLASH_WINDOWS
655 static bool set_interface_up(int fd, const char *intf, bool up)
658 strncpy(ifr.ifr_name, intf, IFNAMSIZ);
660 if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) {
661 perror("ioctl(SIOCGIFFLAGS)");
666 ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
668 ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
671 if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) {
672 perror("ioctl(SIOCSIFFLAGS)");
681 int ethsock_ip_add(struct ethsock *sock, uint32_t ipaddr, uint32_t ipmask, struct ethsock_ip_undo **undo)
683 if (undo && !(*undo = malloc(sizeof(struct ethsock_ip_undo)))) {
688 int fd = socket(AF_INET, SOCK_DGRAM, 0);
690 sock_perror("socket");
695 #ifndef NMRPFLASH_WINDOWS
696 // XXX: undo is non-zero only if we're adding an IP
698 #ifdef NMRPFLASH_LINUX
700 strncpy(ifr.ifr_name, sock->intf, IFNAMSIZ);
701 // FIXME: automatically determine the next free alias
702 strcat(ifr.ifr_name, ":42");
705 set_addr(&ifr.ifr_addr, ipaddr);
706 if (ioctl(fd, SIOCSIFADDR, &ifr) != 0) {
707 perror("ioctl(SIOSIFADDR)");
711 set_addr(&ifr.ifr_netmask, ipmask);
712 if (ioctl(fd, SIOCSIFNETMASK, &ifr) != 0) {
713 perror("ioctl(SIOCSIFNETMASK)");
717 (*undo)->ip[0] = ipaddr;
718 (*undo)->ip[1] = ipmask;
721 if (!set_interface_up(fd, ifr.ifr_name, add ? true : false)) {
724 #else // NMRPFLASH_OSX (or any other BSD)
725 struct ifaliasreq ifra;
726 strncpy(ifra.ifra_name, sock->intf, IFNAMSIZ);
728 set_addr(&ifra.ifra_addr, ipaddr);
729 set_addr(&ifra.ifra_mask, ipmask);
730 //set_addr(&ifra.ifra_broadaddr, (ipaddr & ipmask) | ~ipmask);
731 memset(&ifra.ifra_broadaddr, 0, sizeof(ifra.ifra_broadaddr));
733 if (ioctl(fd, add ? SIOCAIFADDR : SIOCDIFADDR, &ifra) != 0) {
734 perror(add ? "ioctl(SIOCAIFADDR)" : "ioctl(SIOCDIFADDR)");
739 (*undo)->ip[0] = ipaddr;
740 (*undo)->ip[1] = ipmask;
741 set_interface_up(fd, ifra.ifra_name, true);
745 #else // NMRPFLASH_WINDOWS
746 struct sockaddr_in sin;
749 (*undo)->context = 0;
751 DWORD err = AddIPAddress(ipaddr, ipmask, sock->index, &(*undo)->context, &instance);
752 if (err != NO_ERROR && err != ERROR_DUP_DOMAINNAME && err != ERROR_OBJECT_ALREADY_EXISTS) {
753 win_perror2("AddIPAddress", err);
757 set_addr(&sin, ipaddr);
758 clock_t now = clock();
760 /* Wait until the new IP has actually been added */
762 while (bind(fd, (struct sockaddr*)&sin, sizeof(sin)) != 0) {
763 if (((clock() - now) / CLOCKS_PER_SEC) >= 5) {
764 fprintf(stderr, "Failed to bind after 5 seconds: ");
766 DeleteIPAddress((*undo)->context);
775 #ifndef NMRPFLASH_WINDOWS
783 int ethsock_ip_del(struct ethsock *sock, struct ethsock_ip_undo **undo)
791 #ifndef NMRPFLASH_WINDOWS
792 if ((*undo)->ip[0] != INADDR_NONE) {
793 ret = ethsock_ip_add(sock, (*undo)->ip[0], (*undo)->ip[1], NULL);
798 DeleteIPAddress((*undo)->context);