-#include <sys/socket.h>
#include <sys/types.h>
-#include <net/if_dl.h>
#include <stdbool.h>
-#include <ifaddrs.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
+#include "nmrpd.h"
+
+#if defined(NMRPFLASH_WINDOWS)
+#define NMRPFLASH_NETALIAS_PREFIX "net"
+#define WPCAP
+#include <pcap.h>
+#else
#include <pcap.h>
-#include "ethsock.h"
+#include <ifaddrs.h>
+#if defined(NMRPFLASH_LINUX)
+#define NMRPFLASH_AF_PACKET AF_PACKET
+#include <linux/if_packet.h>
+#else
+#define NMRPFLASH_AF_PACKET AF_LINK
+#include <net/if_types.h>
+#endif
+#endif
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
+
struct ethsock
{
pcap_t *pcap;
- struct timeval timeout;
+#ifndef NMRPFLASH_WINDOWS
int fd;
+#else
+ HANDLE handle;
+#endif
+ unsigned timeout;
uint8_t hwaddr[6];
};
-static bool ethsock_fill_hwaddr(struct ethsock *sock, const char *interface)
+const char *mac_to_str(uint8_t *mac)
+{
+ static char buf[18];
+ snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
+ mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+ return buf;
+}
+
+static int x_pcap_findalldevs(pcap_if_t **devs)
+{
+ char errbuf[PCAP_ERRBUF_SIZE];
+ if (pcap_findalldevs(devs, errbuf) != 0) {
+ fprintf(stderr, "%s.\n", errbuf);
+ return -1;
+ }
+
+ return 0;
+}
+
+#ifndef NMRPFLASH_WINDOWS
+static inline bool sockaddr_get_hwaddr(struct sockaddr *sa, uint8_t *hwaddr)
{
- struct ifaddrs *ifas, *ifa;
void *src;
+
+ if (sa->sa_family != NMRPFLASH_AF_PACKET) {
+ return false;
+ }
+
+#ifndef NMRPFLASH_LINUX
+ if (((struct sockaddr_dl*)addr)->sdl_type != IFT_ETHER) {
+ return false;
+ }
+ src = LLADDR((struct sockaddr_dl*)sa);
+#else
+ src = ((struct sockaddr_ll*)sa)->sll_addr;
+#endif
+
+ memcpy(hwaddr, src, 6);
+ return true;
+}
+
+static bool get_hwaddr_from_intf(const char *intf, uint8_t *hwaddr)
+{
+ struct ifaddrs *ifas, *ifa;
bool found;
if (getifaddrs(&ifas) != 0) {
found = false;
for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
- if (!strcmp(ifa->ifa_name, interface)) {
-#ifdef __linux__
- if (ifa->ifa_addr->sa_family != AF_PACKET) {
- continue;
+ if (!strcmp(ifa->ifa_name, intf)) {
+ if (sockaddr_get_hwaddr(ifa->ifa_addr, hwaddr)) {
+ found = true;
+ break;
}
- src = ((struct sockaddr_ll*)ifa->ifa_addr)->sll_addr;
+ }
+ }
+
+ freeifaddrs(ifas);
+ return found;
+}
+
#else
- if (ifa->ifa_addr->sa_family != AF_LINK) {
+
+void win_perror2(const char *msg, DWORD err)
+{
+ char *buf = NULL;
+ FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+ FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+ NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+ (LPTSTR)&buf, 0, NULL);
+
+ if (buf) {
+ /* FormatMessageA terminates buf with CRLF! */
+ fprintf(stderr, "%s: %s", msg, buf);
+ LocalFree(buf);
+ } else {
+ fprintf(stderr, "%s: error %d\n", msg, (int)err);
+ }
+}
+
+static bool get_hwaddr_from_intf(const char *intf, uint8_t *hwaddr)
+{
+ PIP_ADAPTER_INFO adapters, adapter;
+ DWORD ret;
+ ULONG i, bufLen = 0;
+ bool found = false;
+
+ if ((ret = GetAdaptersInfo(NULL, &bufLen)) != ERROR_BUFFER_OVERFLOW) {
+ win_perror2("GetAdaptersInfo", ret);
+ return false;
+ }
+
+ adapters = malloc(bufLen);
+ if (!adapters) {
+ perror("malloc");
+ return false;
+ }
+
+ if ((ret = GetAdaptersInfo(adapters, &bufLen) == NO_ERROR)) {
+ for (adapter = adapters; adapter; adapter = adapter->Next) {
+ if (adapter->Type != MIB_IF_TYPE_ETHERNET) {
continue;
}
- src = LLADDR((struct sockaddr_dl*)ifa->ifa_addr);
-#endif
- memcpy(sock->hwaddr, src, 6);
- found = true;
+
+ /* Interface names from WinPcap are "\Device\NPF_{GUID}", while
+ * AdapterName from GetAdaptersInfo is just "{GUID}".*/
+ if (strstr(intf, adapter->AdapterName)) {
+ if (adapter->AddressLength == 6) {
+ for (i = 0; i != 6; ++i) {
+ hwaddr[i] = adapter->Address[i];
+ }
+
+ found = true;
+ break;
+ }
+ }
+ }
+ } else {
+ win_perror2("GetAdaptersInfo", ret);
+ }
+
+ free(adapters);
+ return found;
+}
+
+static const char *intf_alias_to_wpcap(const char *intf)
+{
+ static char buf[128];
+ pcap_if_t *devs, *dev;
+ unsigned i = 0, dev_num = 0;
+
+ if (intf[0] == '\\') {
+ return intf;
+ } else if (sscanf(intf, NMRPFLASH_NETALIAS_PREFIX "%u", &dev_num) != 1) {
+ fprintf(stderr, "Invalid interface alias.\n");
+ return NULL;
+ }
+
+ if (x_pcap_findalldevs(&devs) != 0) {
+ return NULL;
+ }
+
+ for (dev = devs; dev; dev = dev->next, ++i) {
+ if (i == dev_num) {
+ if (verbosity) {
+ printf("%s%u: %s\n", NMRPFLASH_NETALIAS_PREFIX, i, dev->name);
+ }
+ strncpy(buf, dev->name, sizeof(buf) - 1);
+ buf[sizeof(buf) - 1] = '\0';
break;
}
}
- if (!found) {
- fprintf(stderr, "Failed to get MAC address of interface %s.\n", interface);
+ pcap_freealldevs(devs);
+
+ if (!dev) {
+ fprintf(stderr, "Interface alias not found.\n");
+ return NULL;
+ }
+
+ return buf;
+}
+
+static const char *intf_get_pretty_name(const char *intf)
+{
+ static char buf[512];
+ char *guid;
+ HKEY hkey;
+ LONG err;
+ DWORD len;
+
+ guid = strstr(intf, "NPF_{");
+ if (!guid) {
+ return NULL;
}
- freeifaddrs(ifas);
- return found;
+ guid += 4;
+
+ snprintf(buf, sizeof(buf),
+ "System\\CurrentControlSet\\Control\\Network\\"
+ "{4D36E972-E325-11CE-BFC1-08002BE10318}\\"
+ "%s\\Connection", guid);
+ err = RegOpenKeyExA(HKEY_LOCAL_MACHINE, buf, 0, KEY_READ, &hkey);
+ if (err != ERROR_SUCCESS) {
+ if (verbosity > 1) {
+ win_perror2("RegOpenKeyExA", err);
+ }
+ return NULL;
+ }
+
+ len = sizeof(buf);
+ err = RegQueryValueExA(hkey, "Name", NULL, NULL, (LPBYTE)buf, &len);
+ if (err == ERROR_SUCCESS) {
+ intf = buf;
+ } else {
+ if (verbosity > 1) {
+ win_perror2("RegQueryValueExA", err);
+ }
+ intf = NULL;
+ }
+
+ RegCloseKey(hkey);
+ return intf;
}
+#endif
inline uint8_t *ethsock_get_hwaddr(struct ethsock *sock)
{
return sock->hwaddr;
}
-struct ethsock *ethsock_create(const char *interface, uint16_t protocol)
+struct ethsock *ethsock_create(const char *intf, uint16_t protocol)
{
char buf[PCAP_ERRBUF_SIZE];
struct bpf_program fp;
return NULL;
}
- if (!ethsock_fill_hwaddr(sock, interface)) {
- goto cleanup_malloc;
+#ifdef NMRPFLASH_WINDOWS
+ intf = intf_alias_to_wpcap(intf);
+ if (!intf) {
+ return NULL;
}
+#endif
buf[0] = '\0';
- sock->pcap = pcap_open_live(interface, BUFSIZ, 1, 1, buf);
+ sock->pcap = pcap_open_live(intf, BUFSIZ, 1, 1, buf);
if (!sock->pcap) {
- fprintf(stderr, "%s\n", buf);
+ fprintf(stderr, "%s.\n", buf);
goto cleanup_malloc;
}
}
if (pcap_datalink(sock->pcap) != DLT_EN10MB) {
- fprintf(stderr, "Interface %s not supported.\n", interface);
+ fprintf(stderr, "%s is not an ethernet interface.\n",
+ intf);
goto cleanup_pcap;
}
+ if (!get_hwaddr_from_intf(intf, sock->hwaddr)) {
+ fprintf(stderr, "Failed to get MAC address of interface.\n");
+ goto cleanup_malloc;
+ }
+
+#ifndef NMRPFLASH_WINDOWS
sock->fd = pcap_get_selectable_fd(sock->pcap);
if (sock->fd == -1) {
fprintf(stderr, "No selectable file descriptor available.\n");
goto cleanup_pcap;
}
+#else
+ sock->handle = pcap_getevent(sock->pcap);
+ if (!sock->handle) {
+ fprintf(stderr, "No event handle available.\n");
+ goto cleanup_pcap;
+ }
+
+ err = pcap_setmintocopy(sock->pcap, 1);
+ if (err) {
+ pcap_perror(sock->pcap, "pcap_setmintocopy");
+ goto cleanup_pcap;
+ }
+#endif
- snprintf(buf, sizeof(buf), "ether proto %04x", protocol);
- err = pcap_compile(sock->pcap, &fp, buf, 0, PCAP_NETMASK_UNKNOWN);
+ snprintf(buf, sizeof(buf), "ether proto 0x%04x and not ether src %s",
+ protocol, mac_to_str(sock->hwaddr));
+
+ err = pcap_compile(sock->pcap, &fp, buf, 0, 0);
if (err) {
pcap_perror(sock->pcap, "pcap_compile");
goto cleanup_pcap;
}
- if ((err = pcap_setfilter(sock->pcap, &fp))) {
+ err = pcap_setfilter(sock->pcap, &fp);
+ pcap_freecode(&fp);
+
+ if (err) {
pcap_perror(sock->pcap, "pcap_setfilter");
goto cleanup_pcap;
}
return NULL;
}
+int select_fd(int fd, unsigned timeout)
+{
+ struct timeval tv;
+ int status;
+ fd_set fds;
+
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+
+ tv.tv_sec = timeout / 1000;
+ tv.tv_usec = 1000 * (timeout % 1000);
+
+ status = select(fd + 1, &fds, NULL, NULL, &tv);
+ if (status < 0) {
+ sock_perror("select");
+ }
+
+ return status;
+}
+
ssize_t ethsock_recv(struct ethsock *sock, void *buf, size_t len)
{
struct pcap_pkthdr* hdr;
const u_char *capbuf;
int status;
- fd_set fds;
-
- if (sock->timeout.tv_sec || sock->timeout.tv_usec) {
- FD_ZERO(&fds);
- FD_SET(sock->fd, &fds);
+#ifdef NMRPFLASH_WINDOWS
+ DWORD ret;
- status = select(sock->fd + 1, &fds, NULL, NULL, &sock->timeout);
- if (status == -1) {
- perror("select");
+ if (sock->timeout) {
+ ret = WaitForSingleObject(sock->handle, sock->timeout);
+ if (ret == WAIT_TIMEOUT) {
+ return 0;
+ } else if (ret != WAIT_OBJECT_0) {
+ win_perror2("WaitForSingleObject", ret);
+ return -1;
+ }
+ }
+#else
+ if (sock->timeout) {
+ status = select_fd(sock->fd, sock->timeout);
+ if (status < 0) {
return -1;
} else if (status == 0) {
- return 1;
+ return 0;
}
}
+#endif
status = pcap_next_ex(sock->pcap, &hdr, &capbuf);
switch (status) {
int ethsock_send(struct ethsock *sock, void *buf, size_t len)
{
-#if defined(_WIN32) || defined(_WIN64)
+#ifdef NMRPFLASH_WINDOWS
if (pcap_sendpacket(sock->pcap, buf, len) == 0) {
return 0;
} else {
return 0;
}
-int ethsock_set_timeout(struct ethsock *sock, unsigned msec)
+inline int ethsock_set_timeout(struct ethsock *sock, unsigned msec)
{
- sock->timeout.tv_sec = msec / 1000;
- sock->timeout.tv_usec = (msec % 1000) * 1000;
+ sock->timeout = msec;
+ return 0;
+}
+
+static bool get_hwaddr_from_pcap(const pcap_if_t *dev, uint8_t *hwaddr)
+{
+#ifndef NMRPFLASH_WINDOWS
+ pcap_addr_t *addr;
+ int i;
+
+ for (addr = dev->addresses; addr; addr = addr->next) {
+ if (verbosity > 1) {
+ printf("%s: sa_family=%d, sa_data={ ", dev->name,
+ addr->addr->sa_family);
+ for (i = 0; i != sizeof(addr->addr->sa_data); ++i) {
+ printf("%02x ", addr->addr->sa_data[i] & 0xff);
+ }
+ printf("}\n");
+ }
+
+ if (sockaddr_get_hwaddr(addr->addr, hwaddr)) {
+ return true;
+ }
+ }
+#endif
+
+ return get_hwaddr_from_intf(dev->name, hwaddr);
+}
+
+int ethsock_list_all(void)
+{
+ pcap_if_t *devs, *dev;
+ pcap_addr_t *addr;
+ uint8_t hwaddr[6];
+ unsigned dev_num = 0, dev_ok = 0;
+#ifdef NMRPFLASH_WINDOWS
+ const char *pretty;
+#endif
+
+ if (x_pcap_findalldevs(&devs) != 0) {
+ return -1;
+ }
+
+ memset(hwaddr, 0, 6);
+
+ for (dev = devs; dev; dev = dev->next, ++dev_num) {
+ if (dev->flags & PCAP_IF_LOOPBACK) {
+ if (verbosity) {
+ printf("%-15s (loopback device)\n", dev->name);
+ }
+ continue;
+ }
+
+ if (!get_hwaddr_from_pcap(dev, hwaddr)) {
+ if (verbosity) {
+ printf("%-15s (not an ethernet device)\n",
+ dev->name);
+ }
+ continue;
+ }
+
+#ifndef NMRPFLASH_WINDOWS
+ printf("%-15s", dev->name);
+#else
+ /* Call this here so *_perror() calls don't happen within a line */
+ pretty = intf_get_pretty_name(dev->name);
+
+ if (!verbosity) {
+ printf("%s%u", NMRPFLASH_NETALIAS_PREFIX, dev_num);
+ } else {
+ printf("%s", dev->name);
+ }
+#endif
+
+ for (addr = dev->addresses; addr; addr = addr->next) {
+ if (addr->addr->sa_family == AF_INET) {
+ printf(" %-15s",
+ inet_ntoa(((struct sockaddr_in*)addr->addr)->sin_addr));
+ break;
+ }
+ }
+
+ if (!addr) {
+ printf(" %-15s", "0.0.0.0");
+ }
+
+ printf(" %s", mac_to_str(hwaddr));
+
+#ifdef NMRPFLASH_WINDOWS
+ if (pretty) {
+ printf(" (%s)", pretty);
+ } else if (dev->description) {
+ printf(" (%s)", dev->description);
+ }
+
+#endif
+ printf("\n");
+ ++dev_ok;
+ }
+
+ if (!dev_ok) {
+ printf("No suitable network interfaces found.\n");
+ }
+
return 0;
}
projects / oweals / nmrpflash.git / blobdiff