+/**
+ * nmrpflash - Netgear Unbrick Utility
+ * Copyright (C) 2016 Joseph Lehner <joseph.c.lehner@gmail.com>
+ *
+ * nmrpflash is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * nmrpflash is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with nmrpflash. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
#include <sys/types.h>
#include <stdbool.h>
+#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
+#include <fcntl.h>
#include "nmrpd.h"
#if defined(NMRPFLASH_WINDOWS)
#if defined(NMRPFLASH_LINUX)
#define NMRPFLASH_AF_PACKET AF_PACKET
#include <linux/if_packet.h>
+#include <netlink/route/addr.h>
+#include <netlink/route/neighbour.h>
#else
#define NMRPFLASH_AF_PACKET AF_LINK
#include <net/if_types.h>
+#include <net/if_media.h>
#endif
#endif
pcap_t *pcap;
#ifndef NMRPFLASH_WINDOWS
int fd;
+#ifdef NMRPFLASH_LINUX
+ bool stp;
+#endif
#else
HANDLE handle;
DWORD index;
uint8_t hwaddr[6];
};
+struct ethsock_arp_undo
+{
+ uint32_t ipaddr;
+ uint8_t hwaddr[6];
+};
+
struct ethsock_ip_undo
{
#ifndef NMRPFLASH_WINDOWS
return 0;
}
+#ifndef NMRPFLASH_LINUX
+static int systemf(const char *fmt, ...)
+{
+ char cmd[1024];
+ int ret;
+ va_list va;
+ va_start(va, fmt);
+
+ ret = vsnprintf(cmd, sizeof(cmd) - 1, fmt, va);
+ if (ret >= sizeof(cmd) - 1) {
+ return -1;
+ }
+
+ ret = system(cmd);
+ va_end(va);
+
+ return ret;
+}
+#endif
+
#ifndef NMRPFLASH_WINDOWS
static inline bool sockaddr_get_hwaddr(struct sockaddr *sa, uint8_t *hwaddr)
{
return true;
}
-static bool get_intf_info(const char *intf, uint8_t *hwaddr, void *dummy)
+#ifdef NMRPFLASH_LINUX
+static int bridge_stp_state(const char *intf)
+{
+ char name[256];
+ snprintf(name, sizeof(name), "/sys/class/net/%s/bridge/stp_state", intf);
+ return open(name, O_RDWR, 0644);
+}
+
+static bool bridge_stp_enabled(const char *intf)
+{
+ char c;
+ int fd = bridge_stp_state(intf);
+ if (fd == -1) {
+ return false;
+ }
+
+ if (read(fd, &c, 1) != 1) {
+ c = '0';
+ }
+
+ close(fd);
+ return c == '1';
+}
+
+static bool bridge_stp(const char *intf, bool enabled)
+{
+ bool ret;
+ const char *s = enabled ? "1\n" : "0\n";
+ int fd = bridge_stp_state(intf);
+ if (fd == -1) {
+ return false;
+ }
+
+ ret = (write(fd, s, 2) == 2);
+ close(fd);
+
+ return ret;
+}
+
+static struct nl_addr *build_ip(uint32_t ip)
+{
+ struct nl_addr *na = nl_addr_build(AF_INET, &ip, 4);
+ if (!na) {
+ xperror("nl_addr_build");
+ }
+
+ return na;
+}
+
+static struct nl_sock *xnl_socket_route()
+{
+ int err;
+ struct nl_sock *sk = nl_socket_alloc();
+ if (sk) {
+ if (!(err = nl_connect(sk, NETLINK_ROUTE))) {
+ return sk;
+ }
+ nl_socket_free(sk);
+ nl_perror(err, "nl_connect");
+ } else {
+ xperror("nl_socket_alloc");
+ }
+
+ return NULL;
+}
+
+static bool intf_add_del_ip(const char *intf, uint32_t ipaddr, uint32_t ipmask, bool add)
+{
+ struct rtnl_addr *ra = NULL;
+ struct nl_sock *sk = NULL;
+ struct nl_addr *na = NULL;
+ int err = 1;
+
+ if (!(sk = xnl_socket_route())) {
+ return false;
+ }
+
+ if (!(ra = rtnl_addr_alloc())) {
+ xperror("rtnl_addr_alloc");
+ goto out;
+ }
+
+ rtnl_addr_set_ifindex(ra, if_nametoindex(intf));
+
+ if (!(na = build_ip(ipaddr))) {
+ goto out;
+ }
+
+ nl_addr_set_prefixlen(na, bitcount(ipmask));
+ rtnl_addr_set_local(ra, na);
+ nl_addr_put(na);
+
+ if (!(na = build_ip((ipaddr & ipmask) | ~ipmask))) {
+ goto out;
+ }
+
+ rtnl_addr_set_broadcast(ra, na);
+ nl_addr_put(na);
+
+ if ((err = add ? rtnl_addr_add(sk, ra, 0) : rtnl_addr_delete(sk, ra, 0)) < 0) {
+ if (add && err == -NLE_EXIST) {
+ err = 0;
+ } else if (add || verbosity > 1) {
+ nl_perror(err, add ? "rtnl_addr_add" : "rtnl_addr_delete");
+ }
+ }
+
+out:
+ rtnl_addr_put(ra);
+ nl_socket_free(sk);
+
+ return !err;
+}
+
+static bool intf_add_del_arp(const char *intf, uint32_t ipaddr, uint8_t *hwaddr, bool add)
+{
+#if 0
+ struct arpreq arp;
+ memset(&arp, 0, sizeof(arp));
+ arp.arp_ha.sa_family = ARPHRD_ETHER;
+ memcpy(&arp.arp_ha.sa_data, hwaddr, 6);
+ arp.arp_flags = ATF_PERM | ATF_COM;
+
+ struct sockaddr_in *in = (struct sockaddr_in*)&req.arp_pa;
+ in->sin_addr.s_addr = htonl(ipaddr);
+ in->sin_family = AF_INET;
+
+ int fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ return false;
+ }
+
+ bool ret = true;
+
+ if (ioctl(fd, add ? SIOCSARP : SIOCDARP, &req) < 0) {
+ perror(add ? "ioctl(SIOCSARP)" : "ioctl(SIOCDARP");
+ ret = false;
+ }
+
+ close(fd);
+ return ret;
+#else
+ struct nl_sock *sk;
+ struct rtnl_neigh *neigh;
+ struct nl_addr *mac, *ip;
+ int err = 1;
+
+ sk = NULL;
+ neigh = NULL;
+ mac = ip = NULL;
+
+ if (!(sk = xnl_socket_route())) {
+ goto out;
+ }
+
+ if (!(neigh = rtnl_neigh_alloc())) {
+ xperror("rtnl_neigh_alloc");
+ goto out;
+ }
+
+ if (!(mac = nl_addr_build(AF_PACKET, hwaddr, 6))) {
+ xperror("nl_addr_build");
+ goto out;
+ }
+
+ if (!(ip = nl_addr_build(AF_INET, &ipaddr, 4))) {
+ xperror("nl_addr_build");
+ goto out;
+ }
+
+ rtnl_neigh_set_ifindex(neigh, if_nametoindex(intf));
+ rtnl_neigh_set_dst(neigh, ip);
+
+ err = rtnl_neigh_delete(sk, neigh, 0);
+
+ if (add) {
+ rtnl_neigh_set_lladdr(neigh, mac);
+ rtnl_neigh_set_state(neigh, NUD_PERMANENT);
+ err = rtnl_neigh_add(sk, neigh, NLM_F_CREATE);
+ }
+
+ if (err && (add || verbosity > 1)) {
+ nl_perror(err, add ? "rtnl_neigh_add" : "rtnl_neigh_delete");
+ }
+
+out:
+ nl_addr_put(ip);
+ nl_addr_put(mac);
+ rtnl_neigh_put(neigh);
+ nl_socket_free(sk);
+
+ return !err;
+#endif
+}
+
+#endif
+
+static bool intf_get_info(const char *intf, uint8_t *hwaddr, bool *bridge)
{
struct ifaddrs *ifas, *ifa;
bool found;
if (getifaddrs(&ifas) != 0) {
- perror("getifaddrs");
+ xperror("getifaddrs");
return false;
}
found = false;
+ if (bridge) {
+ *bridge = false;
+ }
+
for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
if (!strcmp(ifa->ifa_name, intf)) {
if (sockaddr_get_hwaddr(ifa->ifa_addr, hwaddr)) {
+#ifdef NMRPFLASH_BSD
+ if (bridge) {
+ *bridge = ((struct if_data*) ifa->ifa_data)->ifi_type == IFT_BRIDGE;
+ }
+#endif
found = true;
break;
}
}
}
-static bool get_intf_info(const char *intf, uint8_t *hwaddr, DWORD *index)
+static bool intf_get_info(const char *intf, uint8_t *hwaddr, DWORD *index)
{
PIP_ADAPTER_INFO adapters, adapter;
DWORD ret;
adapters = malloc(bufLen);
if (!adapters) {
- perror("malloc");
+ xperror("malloc");
return false;
}
char buf[PCAP_ERRBUF_SIZE];
struct bpf_program fp;
struct ethsock *sock;
+ bool is_bridge;
int err;
- sock = malloc(sizeof(struct ethsock));
- if (!sock) {
- perror("malloc");
- return NULL;
- }
-
#ifdef NMRPFLASH_WINDOWS
intf = intf_alias_to_wpcap(intf);
if (!intf) {
}
#endif
+ sock = malloc(sizeof(struct ethsock));
+ if (!sock) {
+ xperror("malloc");
+ return NULL;
+ }
+
buf[0] = '\0';
sock->intf = intf;
sock->pcap = pcap_open_live(sock->intf, BUFSIZ, 1, 1, buf);
if (!sock->pcap) {
fprintf(stderr, "%s.\n", buf);
- goto cleanup_malloc;
+ goto cleanup;
}
if (*buf) {
if (pcap_datalink(sock->pcap) != DLT_EN10MB) {
fprintf(stderr, "%s is not an ethernet interface.\n",
intf);
- goto cleanup_pcap;
+ goto cleanup;
}
#ifndef NMRPFLASH_WINDOWS
- err = !get_intf_info(intf, sock->hwaddr, NULL);
+ err = !intf_get_info(intf, sock->hwaddr, &is_bridge);
#else
- err = !get_intf_info(intf, sock->hwaddr, &sock->index);
+ err = !intf_get_info(intf, sock->hwaddr, &sock->index);
#endif
if (err) {
fprintf(stderr, "Failed to get interface info.\n");
- goto cleanup_malloc;
+ goto cleanup;
}
#ifndef NMRPFLASH_WINDOWS
sock->fd = pcap_get_selectable_fd(sock->pcap);
if (sock->fd == -1) {
pcap_perror(sock->pcap, "pcap_get_selectable_fd");
- goto cleanup_pcap;
+ goto cleanup;
}
#else
sock->handle = pcap_getevent(sock->pcap);
if (!sock->handle) {
pcap_perror(sock->pcap, "pcap_getevent");
- goto cleanup_pcap;
+ goto cleanup;
}
err = pcap_setmintocopy(sock->pcap, 1);
if (err) {
pcap_perror(sock->pcap, "pcap_setmintocopy");
- goto cleanup_pcap;
+ goto cleanup;
}
#endif
err = pcap_compile(sock->pcap, &fp, buf, 0, 0);
if (err) {
pcap_perror(sock->pcap, "pcap_compile");
- goto cleanup_pcap;
+ goto cleanup;
}
err = pcap_setfilter(sock->pcap, &fp);
if (err) {
pcap_perror(sock->pcap, "pcap_setfilter");
- goto cleanup_pcap;
+ goto cleanup;
}
+#ifdef NMRPFLASH_LINUX
+ // nmrpflash does not work on bridge interfaces with STP enabled
+ if ((sock->stp = bridge_stp_enabled(intf))) {
+ if (!bridge_stp(intf, false)) {
+ fprintf(stderr, "Warning: failed to disable STP on %s.\n", intf);
+ }
+ }
+#else
+ if (is_bridge) {
+ fprintf(stderr, "Warning: bridge interfaces are not fully "
+ "supported on this platform.\n");
+ }
+#endif
+
return sock;
-cleanup_pcap:
- pcap_close(sock->pcap);
-cleanup_malloc:
- free(sock);
+cleanup:
+ ethsock_close(sock);
return NULL;
}
FD_ZERO(&fds);
FD_SET(fd, &fds);
- tv.tv_sec = timeout / 1000;
- tv.tv_usec = 1000 * (timeout % 1000);
+ tv.tv_sec = timeout / 1000000;
+ tv.tv_usec = timeout % 1000000;
status = select(fd + 1, &fds, NULL, NULL, &tv);
if (status < 0) {
int ethsock_close(struct ethsock *sock)
{
- pcap_close(sock->pcap);
+ if (!sock) {
+ return 0;
+ }
+
+#ifdef NMRPFLASH_LINUX
+ if (sock->stp) {
+ bridge_stp(sock->intf, true);
+ }
+#endif
+ if (sock->pcap) {
+ pcap_close(sock->pcap);
+ }
+
free(sock);
return 0;
}
return 0;
}
-#ifndef NMRPFLASH_WINDOWS
-int ethsock_arp_add(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr)
+static int ethsock_arp(struct ethsock *sock, uint8_t *hwaddr, uint32_t ipaddr, struct ethsock_arp_undo **undo)
{
- return 0;
-}
-
-int ethsock_arp_del(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr)
-{
- return 0;
-}
-#else
-static int ethsock_arp(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr, int add)
-{
- DWORD ret;
+#if defined(NMRPFLASH_UNIX) && !defined(NMRPFLASH_LINUX)
+ struct in_addr addr = { .s_addr = ipaddr };
+#elif defined(NMRPFLASH_WINDOWS)
+ DWORD err;
MIB_IPNETROW arp = {
.dwIndex = sock->index,
.dwPhysAddrLen = 6,
- .dwAddr = ipaddr->s_addr,
+ .dwAddr = ipaddr,
.dwType = MIB_IPNET_TYPE_STATIC
};
-
+
memcpy(arp.bPhysAddr, hwaddr, 6);
-
- if (add) {
- ret = CreateIpNetEntry(&arp);
- if (ret != NO_ERROR) {
- win_perror2("CreateIpNetEntry", ret);
+#endif
+
+ if (undo) {
+#if defined(NMRPFLASH_LINUX)
+ if (!intf_add_del_arp(sock->intf, ipaddr, hwaddr, true)) {
return -1;
}
+#elif defined(NMRPFLASH_WINDOWS)
+ err = CreateIpNetEntry(&arp);
+ if (err != NO_ERROR) {
+ win_perror2("CreateIpNetEntry", err);
+ return -1;
+ }
+#else
+ if (systemf("arp -s %s %s", inet_ntoa(addr), mac_to_str(hwaddr)) != 0) {
+ return -1;
+ }
+#endif
+
+ *undo = malloc(sizeof(struct ethsock_arp_undo));
+ if (!*undo) {
+ xperror("malloc");
+ return -1;
+ }
+
+ (*undo)->ipaddr = ipaddr;
+ memcpy((*undo)->hwaddr, hwaddr, 6);
} else {
- DeleteIpNetEntry(&arp);
+#if defined(NMRPFLASH_LINUX)
+ if (!intf_add_del_arp(sock->intf, ipaddr, hwaddr, false)) {
+ return -1;
+ }
+#elif defined(NMRPFLASH_WINDOWS)
+ return DeleteIpNetEntry(&arp) ? 0 : -1;
+#else
+ return systemf("arp -d %s", inet_ntoa(addr));
+#endif
}
-
+
return 0;
}
-int ethsock_arp_add(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr)
+int ethsock_arp_add(struct ethsock *sock, uint8_t *hwaddr, uint32_t ipaddr, struct ethsock_arp_undo **undo)
{
- ethsock_arp_del(sock, hwaddr, ipaddr);
- return ethsock_arp(sock, hwaddr, ipaddr, 1);
+ ethsock_arp(sock, hwaddr, ipaddr, NULL);
+ return undo ? ethsock_arp(sock, hwaddr, ipaddr, undo) : -1;
}
-int ethsock_arp_del(struct ethsock *sock, uint8_t *hwaddr, struct in_addr *ipaddr)
+int ethsock_arp_del(struct ethsock *sock, struct ethsock_arp_undo **undo)
{
- return ethsock_arp(sock, hwaddr, ipaddr, 0);
+ if (!*undo) {
+ return 0;
+ }
+
+ int ret = ethsock_arp(sock, (*undo)->hwaddr, (*undo)->ipaddr, NULL);
+ free(*undo);
+ *undo = NULL;
+ return ret;
}
-#endif
static bool get_hwaddr_from_pcap(const pcap_if_t *dev, uint8_t *hwaddr)
{
}
#endif
- return get_intf_info(dev->name, hwaddr, NULL);
+ return intf_get_info(dev->name, hwaddr, NULL);
}
int ethsock_list_all(void)
pretty = intf_get_pretty_name(dev->name);
if (!verbosity) {
- printf("%s%u", NMRPFLASH_NETALIAS_PREFIX, dev_num);
+ printf("%s%-2u", NMRPFLASH_NETALIAS_PREFIX, dev_num);
} else {
printf("%s", dev->name);
}
struct sockaddr_in* sin = p;
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = addr;
+#ifdef NMRPFLASH_BSD
+ ((struct sockaddr*)p)->sa_len = sizeof(struct sockaddr_in);
+#endif
}
-#ifndef NMRPFLASH_WINDOWS
-static bool set_interface_up(int fd, const char *intf, bool up)
+#if !defined(NMRPFLASH_WINDOWS) && !defined(NMRPFLASH_LINUX)
+static bool intf_up(int fd, const char *intf, bool up)
{
struct ifreq ifr;
strncpy(ifr.ifr_name, intf, IFNAMSIZ);
if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) {
- perror("ioctl(SIOCGIFFLAGS)");
+ if (up) {
+ xperror("ioctl(SIOCGIFFLAGS)");
+ }
return false;
}
}
if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) {
- perror("ioctl(SIOCSIFFLAGS)");
+ if (up) {
+ xperror("ioctl(SIOCSIFFLAGS)");
+ }
return false;
}
return true;
}
-
#endif
-int ethsock_ip_add(struct ethsock *sock, uint32_t ipaddr, uint32_t ipmask, struct ethsock_ip_undo **undo)
+static int ethsock_ip_add_del(struct ethsock *sock, uint32_t ipaddr, uint32_t ipmask, struct ethsock_ip_undo **undo, bool add)
{
- if (undo && !(*undo = malloc(sizeof(struct ethsock_ip_undo)))) {
- perror("malloc");
- return -1;
+ int ret, fd;
+
+ if (add && undo) {
+ if (!(*undo = malloc(sizeof(struct ethsock_ip_undo)))) {
+ xperror("malloc");
+ return -1;
+ }
+
+ memset(*undo, 0, sizeof(**undo));
}
- int fd = socket(AF_INET, SOCK_DGRAM, 0);
- if (!fd) {
+ ret = -1;
+ fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
sock_perror("socket");
- return -1;
+ goto out;
}
- int ret = -1;
#ifndef NMRPFLASH_WINDOWS
- // XXX: undo is non-zero only if we're adding an IP
- bool add = undo;
#ifdef NMRPFLASH_LINUX
- struct ifreq ifr;
- strncpy(ifr.ifr_name, sock->intf, IFNAMSIZ);
- // FIXME: automatically determine the next free alias
- strcat(ifr.ifr_name, ":42");
-
if (add) {
- set_addr(&ifr.ifr_addr, ipaddr);
- if (ioctl(fd, SIOCSIFADDR, &ifr) != 0) {
- perror("ioctl(SIOSIFADDR)");
- goto out;
- }
-
- set_addr(&ifr.ifr_netmask, ipmask);
- if (ioctl(fd, SIOCSIFNETMASK, &ifr) != 0) {
- perror("ioctl(SIOCSIFNETMASK)");
- goto out;
- }
-
(*undo)->ip[0] = ipaddr;
(*undo)->ip[1] = ipmask;
}
- if (!set_interface_up(fd, ifr.ifr_name, add ? true : false)) {
+ if (!intf_add_del_ip(sock->intf, (*undo)->ip[0], (*undo)->ip[1], add)) {
goto out;
}
#else // NMRPFLASH_OSX (or any other BSD)
struct ifaliasreq ifra;
+ memset(&ifra, 0, sizeof(ifra));
strncpy(ifra.ifra_name, sock->intf, IFNAMSIZ);
set_addr(&ifra.ifra_addr, ipaddr);
set_addr(&ifra.ifra_mask, ipmask);
//set_addr(&ifra.ifra_broadaddr, (ipaddr & ipmask) | ~ipmask);
- memset(&ifra.ifra_broadaddr, 0, sizeof(ifra.ifra_broadaddr));
if (ioctl(fd, add ? SIOCAIFADDR : SIOCDIFADDR, &ifra) != 0) {
- perror(add ? "ioctl(SIOCAIFADDR)" : "ioctl(SIOCDIFADDR)");
+ if (add) {
+ xperror("ioctl(SIOCAIFADDR");
+ }
goto out;
}
if (add) {
(*undo)->ip[0] = ipaddr;
(*undo)->ip[1] = ipmask;
- set_interface_up(fd, ifra.ifra_name, true);
+ intf_up(fd, ifra.ifra_name, true);
}
#endif
}
set_addr(&sin, ipaddr);
- clock_t now = clock();
+ time_t beg = time_monotonic();
/* Wait until the new IP has actually been added */
while (bind(fd, (struct sockaddr*)&sin, sizeof(sin)) != 0) {
- if (((clock() - now) / CLOCKS_PER_SEC) >= 5) {
+ if ((time_monotonic() - beg) >= 5) {
fprintf(stderr, "Failed to bind after 5 seconds: ");
sock_perror("bind");
DeleteIPAddress((*undo)->context);
goto out;
}
}
- return 0;
#endif
ret = 0;
#else
closesocket(fd);
#endif
+ if (ret != 0 && undo) {
+ free(*undo);
+ *undo = NULL;
+ }
+
return ret;
}
+int ethsock_ip_add(struct ethsock *sock, uint32_t ipaddr, uint32_t ipmask, struct ethsock_ip_undo **undo)
+{
+ return ethsock_ip_add_del(sock, ipaddr, ipmask, undo, true);
+}
+
int ethsock_ip_del(struct ethsock *sock, struct ethsock_ip_undo **undo)
{
if (!*undo) {
#ifndef NMRPFLASH_WINDOWS
if ((*undo)->ip[0] != INADDR_NONE) {
- ret = ethsock_ip_add(sock, (*undo)->ip[0], (*undo)->ip[1], NULL);
+ ret = ethsock_ip_add_del(sock, (*undo)->ip[0], (*undo)->ip[1], undo, false);
} else {
ret = 0;
}
#else
- DeleteIPAddress((*undo)->context);
- ret = 0;
+ ret = DeleteIPAddress((*undo)->context) ? 0 : -1;
#endif
free(*undo);
projects / oweals / nmrpflash.git / blobdiff