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_arp_undo
47 struct ethsock_ip_undo
49 #ifndef NMRPFLASH_WINDOWS
56 const char *mac_to_str(uint8_t *mac)
59 snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
60 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
64 static int x_pcap_findalldevs(pcap_if_t **devs)
66 char errbuf[PCAP_ERRBUF_SIZE];
67 if (pcap_findalldevs(devs, errbuf) != 0) {
68 fprintf(stderr, "%s.\n", errbuf);
75 #ifndef NMRPFLASH_WINDOWS
76 static inline bool sockaddr_get_hwaddr(struct sockaddr *sa, uint8_t *hwaddr)
80 if (sa->sa_family != NMRPFLASH_AF_PACKET) {
84 #ifndef NMRPFLASH_LINUX
85 if (((struct sockaddr_dl*)sa)->sdl_type != IFT_ETHER) {
88 src = LLADDR((struct sockaddr_dl*)sa);
90 src = ((struct sockaddr_ll*)sa)->sll_addr;
93 memcpy(hwaddr, src, 6);
97 static bool get_intf_info(const char *intf, uint8_t *hwaddr, void *dummy)
99 struct ifaddrs *ifas, *ifa;
102 if (getifaddrs(&ifas) != 0) {
103 perror("getifaddrs");
109 for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
110 if (!strcmp(ifa->ifa_name, intf)) {
111 if (sockaddr_get_hwaddr(ifa->ifa_addr, hwaddr)) {
124 void win_perror2(const char *msg, DWORD err)
127 FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
128 FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
129 NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
130 (LPTSTR)&buf, 0, NULL);
133 /* FormatMessageA terminates buf with CRLF! */
134 fprintf(stderr, "%s: %s", msg, buf);
137 fprintf(stderr, "%s: error %d\n", msg, (int)err);
141 static bool get_intf_info(const char *intf, uint8_t *hwaddr, DWORD *index)
143 PIP_ADAPTER_INFO adapters, adapter;
148 if ((ret = GetAdaptersInfo(NULL, &bufLen)) != ERROR_BUFFER_OVERFLOW) {
149 win_perror2("GetAdaptersInfo", ret);
153 adapters = malloc(bufLen);
159 if ((ret = GetAdaptersInfo(adapters, &bufLen) == NO_ERROR)) {
160 for (adapter = adapters; adapter; adapter = adapter->Next) {
161 if (adapter->Type != MIB_IF_TYPE_ETHERNET && adapter->Type != IF_TYPE_IEEE80211) {
165 /* Interface names from WinPcap are "\Device\NPF_{GUID}", while
166 * AdapterName from GetAdaptersInfo is just "{GUID}".*/
167 if (strstr(intf, adapter->AdapterName)) {
168 if (adapter->AddressLength == 6) {
169 memcpy(hwaddr, adapter->Address, 6);
171 *index = adapter->Index;
179 win_perror2("GetAdaptersInfo", ret);
186 static const char *intf_alias_to_wpcap(const char *intf)
188 static char buf[128];
189 pcap_if_t *devs, *dev;
190 unsigned i = 0, dev_num = 0;
192 if (intf[0] == '\\') {
194 } else if (sscanf(intf, NMRPFLASH_NETALIAS_PREFIX "%u", &dev_num) != 1) {
195 fprintf(stderr, "Invalid interface alias.\n");
199 if (x_pcap_findalldevs(&devs) != 0) {
203 for (dev = devs; dev; dev = dev->next, ++i) {
206 printf("%s%u: %s\n", NMRPFLASH_NETALIAS_PREFIX, i, dev->name);
208 strncpy(buf, dev->name, sizeof(buf) - 1);
209 buf[sizeof(buf) - 1] = '\0';
214 pcap_freealldevs(devs);
217 fprintf(stderr, "Interface alias not found.\n");
224 static const char *intf_get_pretty_name(const char *intf)
226 static char buf[512];
232 guid = strstr(intf, "NPF_{");
239 snprintf(buf, sizeof(buf),
240 "System\\CurrentControlSet\\Control\\Network\\"
241 "{4D36E972-E325-11CE-BFC1-08002BE10318}\\"
242 "%s\\Connection", guid);
243 err = RegOpenKeyExA(HKEY_LOCAL_MACHINE, buf, 0, KEY_READ, &hkey);
244 if (err != ERROR_SUCCESS) {
246 win_perror2("RegOpenKeyExA", err);
252 err = RegQueryValueExA(hkey, "Name", NULL, NULL, (LPBYTE)buf, &len);
253 if (err == ERROR_SUCCESS) {
257 win_perror2("RegQueryValueExA", err);
267 inline uint8_t *ethsock_get_hwaddr(struct ethsock *sock)
272 struct ethsock *ethsock_create(const char *intf, uint16_t protocol)
274 char buf[PCAP_ERRBUF_SIZE];
275 struct bpf_program fp;
276 struct ethsock *sock;
279 sock = malloc(sizeof(struct ethsock));
285 #ifdef NMRPFLASH_WINDOWS
286 intf = intf_alias_to_wpcap(intf);
295 sock->pcap = pcap_open_live(sock->intf, BUFSIZ, 1, 1, buf);
297 fprintf(stderr, "%s.\n", buf);
302 fprintf(stderr, "Warning: %s.\n", buf);
305 if (pcap_datalink(sock->pcap) != DLT_EN10MB) {
306 fprintf(stderr, "%s is not an ethernet interface.\n",
311 #ifndef NMRPFLASH_WINDOWS
312 err = !get_intf_info(intf, sock->hwaddr, NULL);
314 err = !get_intf_info(intf, sock->hwaddr, &sock->index);
317 fprintf(stderr, "Failed to get interface info.\n");
321 #ifndef NMRPFLASH_WINDOWS
322 sock->fd = pcap_get_selectable_fd(sock->pcap);
323 if (sock->fd == -1) {
324 pcap_perror(sock->pcap, "pcap_get_selectable_fd");
328 sock->handle = pcap_getevent(sock->pcap);
330 pcap_perror(sock->pcap, "pcap_getevent");
334 err = pcap_setmintocopy(sock->pcap, 1);
336 pcap_perror(sock->pcap, "pcap_setmintocopy");
341 snprintf(buf, sizeof(buf), "ether proto 0x%04x and not ether src %s",
342 protocol, mac_to_str(sock->hwaddr));
344 err = pcap_compile(sock->pcap, &fp, buf, 0, 0);
346 pcap_perror(sock->pcap, "pcap_compile");
350 err = pcap_setfilter(sock->pcap, &fp);
354 pcap_perror(sock->pcap, "pcap_setfilter");
361 pcap_close(sock->pcap);
367 int select_fd(int fd, unsigned timeout)
376 tv.tv_sec = timeout / 1000;
377 tv.tv_usec = 1000 * (timeout % 1000);
379 status = select(fd + 1, &fds, NULL, NULL, &tv);
381 sock_perror("select");
387 ssize_t ethsock_recv(struct ethsock *sock, void *buf, size_t len)
389 struct pcap_pkthdr* hdr;
390 const u_char *capbuf;
392 #ifdef NMRPFLASH_WINDOWS
396 ret = WaitForSingleObject(sock->handle, sock->timeout);
397 if (ret == WAIT_TIMEOUT) {
399 } else if (ret != WAIT_OBJECT_0) {
400 win_perror2("WaitForSingleObject", ret);
406 status = select_fd(sock->fd, sock->timeout);
409 } else if (status == 0) {
415 status = pcap_next_ex(sock->pcap, &hdr, &capbuf);
418 memcpy(buf, capbuf, MIN(len, hdr->caplen));
423 pcap_perror(sock->pcap, "pcap_next_ex");
426 fprintf(stderr, "pcap_next_ex: returned %d.\n", status);
431 int ethsock_send(struct ethsock *sock, void *buf, size_t len)
433 #ifdef NMRPFLASH_WINDOWS
434 if (pcap_sendpacket(sock->pcap, buf, len) == 0) {
437 pcap_perror(sock->pcap, "pcap_sendpacket");
441 if (pcap_inject(sock->pcap, buf, len) == len) {
444 pcap_perror(sock->pcap, "pcap_inject");
450 int ethsock_close(struct ethsock *sock)
452 pcap_close(sock->pcap);
457 inline int ethsock_set_timeout(struct ethsock *sock, unsigned msec)
459 sock->timeout = msec;
463 #ifndef NMRPFLASH_WINDOWS
464 int ethsock_arp_add(struct ethsock *sock, uint8_t *hwaddr, uint32_t ipaddr, struct ethsock_arp_undo **undo)
469 int ethsock_arp_del(struct ethsock *sock, struct ethsock_arp_undo **undo)
474 static int ethsock_arp(struct ethsock *sock, uint8_t *hwaddr, uint32_t ipaddr, struct ethsock_arp_undo **undo)
478 .dwIndex = sock->index,
481 .dwType = MIB_IPNET_TYPE_STATIC
484 memcpy(arp.bPhysAddr, hwaddr, 6);
487 ret = CreateIpNetEntry(&arp);
488 if (ret != NO_ERROR) {
489 win_perror2("CreateIpNetEntry", ret);
493 *undo = malloc(sizeof(struct ethsock_arp_undo));
499 (*undo)->ipaddr = ipaddr;
500 memcpy((*undo)->hwaddr, hwaddr, 6);
502 DeleteIpNetEntry(&arp);
508 int ethsock_arp_add(struct ethsock *sock, uint8_t *hwaddr, uint32_t ipaddr, struct ethsock_arp_undo **undo)
510 ethsock_arp(sock, hwaddr, ipaddr, NULL);
511 return undo ? ethsock_arp(sock, hwaddr, ipaddr, undo) : -1;
514 int ethsock_arp_del(struct ethsock *sock, struct ethsock_arp_undo **undo)
520 int ret = ethsock_arp(sock, (*undo)->hwaddr, (*undo)->ipaddr, NULL);
527 static bool get_hwaddr_from_pcap(const pcap_if_t *dev, uint8_t *hwaddr)
529 #ifndef NMRPFLASH_WINDOWS
533 for (addr = dev->addresses; addr; addr = addr->next) {
535 printf("%s: sa_family=%d, sa_data={ ", dev->name,
536 addr->addr->sa_family);
537 for (i = 0; i != sizeof(addr->addr->sa_data); ++i) {
538 printf("%02x ", addr->addr->sa_data[i] & 0xff);
543 if (sockaddr_get_hwaddr(addr->addr, hwaddr)) {
549 return get_intf_info(dev->name, hwaddr, NULL);
552 int ethsock_list_all(void)
554 pcap_if_t *devs, *dev;
557 unsigned dev_num = 0, dev_ok = 0;
558 #ifdef NMRPFLASH_WINDOWS
562 if (x_pcap_findalldevs(&devs) != 0) {
566 memset(hwaddr, 0, 6);
568 for (dev = devs; dev; dev = dev->next, ++dev_num) {
569 if (dev->flags & PCAP_IF_LOOPBACK) {
571 printf("%-15s (loopback device)\n", dev->name);
576 if (!get_hwaddr_from_pcap(dev, hwaddr)) {
578 printf("%-15s (not an ethernet device)\n",
584 #ifndef NMRPFLASH_WINDOWS
585 printf("%-15s", dev->name);
587 /* Call this here so *_perror() calls don't happen within a line */
588 pretty = intf_get_pretty_name(dev->name);
591 printf("%s%u", NMRPFLASH_NETALIAS_PREFIX, dev_num);
593 printf("%s", dev->name);
597 for (addr = dev->addresses; addr; addr = addr->next) {
598 if (addr->addr->sa_family == AF_INET) {
600 inet_ntoa(((struct sockaddr_in*)addr->addr)->sin_addr));
606 printf(" %-15s", "0.0.0.0");
609 printf(" %s", mac_to_str(hwaddr));
611 #ifdef NMRPFLASH_WINDOWS
613 printf(" (%s)", pretty);
614 } else if (dev->description) {
615 printf(" (%s)", dev->description);
624 printf("No suitable network interfaces found.\n");
630 int ethsock_for_each_ip(struct ethsock *sock, ethsock_ip_callback_t callback,
633 struct ethsock_ip_callback_args args;
634 pcap_if_t *devs, *dev;
638 if (x_pcap_findalldevs(&devs) != 0) {
644 for (dev = devs; dev; dev = dev->next) {
645 if (strcmp(sock->intf, dev->name)) {
649 for (addr = dev->addresses; addr; addr = addr->next) {
650 if (addr->addr->sa_family == AF_INET) {
651 args.ipaddr = &((struct sockaddr_in*)addr->addr)->sin_addr;
652 args.ipmask = &((struct sockaddr_in*)addr->netmask)->sin_addr;
654 status = callback(&args);
664 pcap_freealldevs(devs);
666 return status <= 0 ? status : 0;
669 static inline void set_addr(void *p, uint32_t addr)
671 struct sockaddr_in* sin = p;
672 sin->sin_family = AF_INET;
673 sin->sin_addr.s_addr = addr;
675 ((struct sockaddr*)p)->sa_len = sizeof(struct sockaddr_in);
679 #ifndef NMRPFLASH_WINDOWS
680 static bool set_interface_up(int fd, const char *intf, bool up)
683 strncpy(ifr.ifr_name, intf, IFNAMSIZ);
685 if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) {
686 perror("ioctl(SIOCGIFFLAGS)");
691 ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
693 ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
696 if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) {
697 perror("ioctl(SIOCSIFFLAGS)");
706 int ethsock_ip_add(struct ethsock *sock, uint32_t ipaddr, uint32_t ipmask, struct ethsock_ip_undo **undo)
708 if (undo && !(*undo = malloc(sizeof(struct ethsock_ip_undo)))) {
713 int fd = socket(AF_INET, SOCK_DGRAM, 0);
715 sock_perror("socket");
720 #ifndef NMRPFLASH_WINDOWS
721 // XXX: undo is non-zero only if we're adding an IP
723 #ifdef NMRPFLASH_LINUX
725 strncpy(ifr.ifr_name, sock->intf, IFNAMSIZ);
726 // FIXME: automatically determine the next free alias
727 strcat(ifr.ifr_name, ":42");
730 set_addr(&ifr.ifr_addr, ipaddr);
731 if (ioctl(fd, SIOCSIFADDR, &ifr) != 0) {
732 perror("ioctl(SIOSIFADDR)");
736 set_addr(&ifr.ifr_netmask, ipmask);
737 if (ioctl(fd, SIOCSIFNETMASK, &ifr) != 0) {
738 perror("ioctl(SIOCSIFNETMASK)");
742 (*undo)->ip[0] = ipaddr;
743 (*undo)->ip[1] = ipmask;
746 if (!set_interface_up(fd, ifr.ifr_name, add ? true : false)) {
749 #else // NMRPFLASH_OSX (or any other BSD)
750 struct ifaliasreq ifra;
751 memset(&ifra, 0, sizeof(ifra));
752 strncpy(ifra.ifra_name, sock->intf, IFNAMSIZ);
754 set_addr(&ifra.ifra_addr, ipaddr);
755 set_addr(&ifra.ifra_mask, ipmask);
756 //set_addr(&ifra.ifra_broadaddr, (ipaddr & ipmask) | ~ipmask);
758 if (ioctl(fd, add ? SIOCAIFADDR : SIOCDIFADDR, &ifra) != 0) {
759 perror(add ? "ioctl(SIOCAIFADDR)" : "ioctl(SIOCDIFADDR)");
764 (*undo)->ip[0] = ipaddr;
765 (*undo)->ip[1] = ipmask;
766 set_interface_up(fd, ifra.ifra_name, true);
770 #else // NMRPFLASH_WINDOWS
771 struct sockaddr_in sin;
774 (*undo)->context = 0;
776 DWORD err = AddIPAddress(ipaddr, ipmask, sock->index, &(*undo)->context, &instance);
777 if (err != NO_ERROR && err != ERROR_DUP_DOMAINNAME && err != ERROR_OBJECT_ALREADY_EXISTS) {
778 win_perror2("AddIPAddress", err);
782 set_addr(&sin, ipaddr);
783 time_t beg = time_monotonic();
785 /* Wait until the new IP has actually been added */
787 while (bind(fd, (struct sockaddr*)&sin, sizeof(sin)) != 0) {
788 if ((time_monotonic() - beg) >= 5) {
789 fprintf(stderr, "Failed to bind after 5 seconds: ");
791 DeleteIPAddress((*undo)->context);
799 #ifndef NMRPFLASH_WINDOWS
807 int ethsock_ip_del(struct ethsock *sock, struct ethsock_ip_undo **undo)
815 #ifndef NMRPFLASH_WINDOWS
816 if ((*undo)->ip[0] != INADDR_NONE) {
817 ret = ethsock_ip_add(sock, (*undo)->ip[0], (*undo)->ip[1], NULL);
822 DeleteIPAddress((*undo)->context);