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Move utils.h implementations to utils.cpp

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This commit is contained in:
Matias Fontanini
2016-01-24 11:37:05 -08:00
parent dc1a5a6982
commit d7df3a449e
3 changed files with 201 additions and 188 deletions
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187
include/tins/utils.h
View File

@@ -30,38 +30,22 @@
#ifndef TINS_UTILS_H
#define TINS_UTILS_H
#ifndef _WIN32
#include <ifaddrs.h>
#else
#include <winsock2.h>
#include <iphlpapi.h>
#undef interface
#include "network_interface.h"
#endif
#include "macros.h"
#if defined(BSD) || defined(__FreeBSD_kernel__)
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#endif
#include <string>
#include <set>
#include <fstream>
#include <vector>
#include <stdint.h>
#include "ip_address.h"
#include "ipv6_address.h"
#include "hw_address.h"
#include "internals.h"
namespace Tins {
class NetworkInterface;
class PacketSender;
class PDU;
class IPv6Address;
template <size_t n, typename Storage>
class HWAddress;
/**
* \brief Network utils namespace.
@@ -71,8 +55,9 @@ class PDU;
* interface listing, etc.
*/
namespace Utils {
/**
* Struct that represents an entry in /proc/net/route
* Struct that represents an entry the routing table
*/
struct RouteEntry {
/**
@@ -266,46 +251,6 @@ TINS_API uint32_t pseudoheader_checksum(IPv6Address source_ip,
uint16_t len,
uint16_t flag);
/** \brief Generic function to iterate through interface and collect
* data.
*
* The parameter is applied to every interface found, allowing
* the object to collect data from them.
* \param functor An instance of an class which implements operator(struct ifaddrs*).
*/
#ifndef _WIN32
template<class Functor>
void generic_iface_loop(Functor& functor) {
struct ifaddrs* ifaddrs = 0;
struct ifaddrs* if_it = 0;
getifaddrs(&ifaddrs);
for (if_it = ifaddrs; if_it; if_it = if_it->ifa_next) {
if (functor(if_it)) {
break;
}
}
if (ifaddrs) {
freeifaddrs(ifaddrs);
}
}
#else // _WIN32
template<class Functor>
void generic_iface_loop(Functor& functor) {
ULONG size;
::GetAdaptersAddresses(AF_INET, 0, 0, 0, &size);
std::vector<uint8_t> buffer(size);
if (::GetAdaptersAddresses(AF_INET, 0, 0, (IP_ADAPTER_ADDRESSES *)&buffer[0], &size) == ERROR_SUCCESS) {
PIP_ADAPTER_ADDRESSES iface = (IP_ADAPTER_ADDRESSES *)&buffer[0];
while (iface) {
if (functor(iface)) {
break;
}
iface = iface->Next;
}
}
}
#endif // _WIN32
template <typename T>
struct is_pdu {
template <typename U>
@@ -338,130 +283,16 @@ dereference_until_pdu(T& value) {
return dereference_until_pdu(*value);
}
#if defined(BSD) || defined(__FreeBSD_kernel__)
inline std::vector<char> query_route_table() {
int mib[6];
std::vector<char> buf;
size_t len;
mib[0] = CTL_NET;
mib[1] = AF_ROUTE;
mib[2] = 0;
mib[3] = AF_INET;
mib[4] = NET_RT_DUMP;
mib[5] = 0;
if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
throw std::runtime_error("sysctl failed");
}
buf.resize(len);
if (sysctl(mib, 6, &buf[0], &len, NULL, 0) < 0) {
throw std::runtime_error("sysctl failed");
}
return buf;
}
template<typename ForwardIterator>
void parse_header(struct rt_msghdr* rtm, ForwardIterator iter) {
char* ptr = (char *)(rtm + 1);
sockaddr* sa = 0;
for (int i = 0; i < RTAX_MAX; i++) {
if (rtm->rtm_addrs & (1 << i)) {
sa = (struct sockaddr *)ptr;
ptr += sa->sa_len;
if (sa->sa_family == 0) {
sa = 0;
}
}
*iter++ = sa;
}
}
#endif
} // Utils
} // Tins
#if defined(BSD) || defined(__FreeBSD_kernel__)
template<class ForwardIterator>
void Tins::Utils::route_entries(ForwardIterator output) {
std::vector<char> buffer = query_route_table();
char* next = &buffer[0], *end = &buffer[buffer.size()];
rt_msghdr* rtm;
std::vector<sockaddr*> sa(RTAX_MAX);
char iface_name[IF_NAMESIZE];
while (next < end) {
rtm = (rt_msghdr*)next;
parse_header(rtm, sa.begin());
if (sa[RTAX_DST] && sa[RTAX_GATEWAY] && if_indextoname(rtm->rtm_index, iface_name)) {
RouteEntry entry;
entry.destination = IPv4Address(((struct sockaddr_in *)sa[RTAX_DST])->sin_addr.s_addr);
entry.gateway = IPv4Address(((struct sockaddr_in *)sa[RTAX_GATEWAY])->sin_addr.s_addr);
if (sa[RTAX_GENMASK]) {
entry.mask = IPv4Address(((struct sockaddr_in *)sa[RTAX_GENMASK])->sin_addr.s_addr);
}
else {
entry.mask = IPv4Address(uint32_t());
}
entry.interface = iface_name;
entry.metric = 0;
*output++ = entry;
}
next += rtm->rtm_msglen;
}
}
#elif defined(_WIN32)
template<class ForwardIterator>
void Tins::Utils::route_entries(ForwardIterator output) {
MIB_IPFORWARDTABLE* table;
ULONG size = 0;
GetIpForwardTable(0, &size, 0);
std::vector<uint8_t> buffer(size);
table = (MIB_IPFORWARDTABLE*)&buffer[0];
GetIpForwardTable(table, &size, 0);
for (DWORD i = 0; i < table->dwNumEntries; i++) {
MIB_IPFORWARDROW* row = &table->table[i];
if (row->dwForwardType == MIB_IPROUTE_TYPE_INDIRECT ||
row->dwForwardType == MIB_IPROUTE_TYPE_DIRECT) {
RouteEntry entry;
entry.interface = NetworkInterface::from_index(row->dwForwardIfIndex).name();
entry.destination = IPv4Address(row->dwForwardDest);
entry.mask = IPv4Address(row->dwForwardMask);
entry.gateway = IPv4Address(row->dwForwardNextHop);
entry.metric = row->dwForwardMetric1;
*output++ = entry;
}
}
}
#else
template<class ForwardIterator>
void Tins::Utils::route_entries(ForwardIterator output) {
using namespace Tins::Internals;
std::ifstream input("/proc/net/route");
std::string destination, mask, metric, gw;
uint32_t dummy;
skip_line(input);
RouteEntry entry;
while (input >> entry.interface >> destination >> gw) {
for (unsigned i(0); i < 4; ++i) {
input >> metric;
}
input >> mask;
from_hex(destination, dummy);
entry.destination = IPv4Address(dummy);
from_hex(mask, dummy);
entry.mask = IPv4Address(dummy);
from_hex(gw, dummy);
entry.gateway = IPv4Address(dummy);
from_hex(metric, dummy);
entry.metric = dummy;
skip_line(input);
*output = entry;
std::vector<RouteEntry> entries = route_entries();
for (size_t i = 0; i < entries.size(); ++i) {
*output = entries[i];
++output;
}
}
#endif
#endif // TINS_UTILS_H

33
src/network_interface.cpp
View File

@@ -40,10 +40,11 @@
#else
#include <linux/if_packet.h>
#endif
#include <ifaddrs.h>
#include <net/if.h>
#else
#include <winsock2.h>
#include <Iphlpapi.h>
#include <iphlpapi.h>
#endif
#include "network_interface.h"
#include "utils.h"
@@ -76,7 +77,7 @@ struct InterfaceInfoCollector {
const struct sockaddr_dl* addr_ptr = ((struct sockaddr_dl*)addr->ifa_addr);
if (addr->ifa_addr->sa_family == AF_LINK && addr_ptr->sdl_index == iface_id) {
info->hw_addr = (const uint8_t*)LLADDR(addr_ptr); // mmmm
info->hw_addr = (const uint8_t*)LLADDR(addr_ptr);
found_hw = true;
}
else if (addr->ifa_addr->sa_family == AF_INET && !std::strcmp(addr->ifa_name, iface_name)) {
@@ -253,7 +254,33 @@ NetworkInterface::Info NetworkInterface::info() const {
Info info;
InterfaceInfoCollector collector(&info, iface_id_, iface_name.c_str());
info.is_up = false;
Utils::generic_iface_loop(collector);
#ifdef _WIN32
ULONG size;
::GetAdaptersAddresses(AF_INET, 0, 0, 0, &size);
std::vector<uint8_t> buffer(size);
if (::GetAdaptersAddresses(AF_INET, 0, 0, (IP_ADAPTER_ADDRESSES *)&buffer[0], &size) == ERROR_SUCCESS) {
PIP_ADAPTER_ADDRESSES iface = (IP_ADAPTER_ADDRESSES *)&buffer[0];
while (iface) {
collector(iface);
iface = iface->Next;
}
}
#else // _WIN32
struct ifaddrs* ifaddrs = 0;
struct ifaddrs* if_it = 0;
getifaddrs(&ifaddrs);
for (if_it = ifaddrs; if_it; if_it = if_it->ifa_next) {
collector(if_it);
}
if (ifaddrs) {
freeifaddrs(ifaddrs);
}
#endif // _WIN32
// If we didn't even get the hw address or ip address, this went wrong
if (!collector.found_hw && !collector.found_ip) {

169
src/utils.cpp
View File

@@ -31,15 +31,21 @@
#include <sstream>
#include <memory>
#include <cstring>
#include <fstream>
#include "utils.h"
#ifndef _WIN32
#if defined(BSD) || defined(__FreeBSD_kernel__)
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/file.h>
#include <sys/sysctl.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <net/if.h>
#include <netinet/in.h>
#else
#include <netpacket/packet.h>
#endif
#include <ifaddrs.h>
#include <netdb.h>
#include <net/if.h>
#ifdef __ANDROID_API__
@@ -47,7 +53,10 @@
#include <linux/in6.h>
#endif
#else
#include <winsock2.h>
#include <iphlpapi.h>
#include <ws2tcpip.h>
#undef interface
#endif
#include "pdu.h"
#include "arp.h"
@@ -56,10 +65,12 @@
#include "network_interface.h"
#include "packet_sender.h"
#include "cxxstd.h"
#include "hw_address.h"
#include "memory_helpers.h"
using std::string;
using std::set;
using std::ifstream;
using std::vector;
using std::back_inserter;
using std::runtime_error;
@@ -97,6 +108,48 @@ addrinfo* resolve_domain(const string& to_resolve, int family) {
}
}
#if defined(BSD) || defined(__FreeBSD_kernel__)
vector<char> query_route_table() {
int mib[6];
vector<char> buf;
size_t len;
mib[0] = CTL_NET;
mib[1] = AF_ROUTE;
mib[2] = 0;
mib[3] = AF_INET;
mib[4] = NET_RT_DUMP;
mib[5] = 0;
if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
throw runtime_error("sysctl failed");
}
buf.resize(len);
if (sysctl(mib, 6, &buf[0], &len, NULL, 0) < 0) {
throw runtime_error("sysctl failed");
}
return buf;
}
template<typename ForwardIterator>
void parse_header(struct rt_msghdr* rtm, ForwardIterator iter) {
char* ptr = (char *)(rtm + 1);
sockaddr* sa = 0;
for (int i = 0; i < RTAX_MAX; i++) {
if (rtm->rtm_addrs & (1 << i)) {
sa = (struct sockaddr *)ptr;
ptr += sa->sa_len;
if (sa->sa_family == 0) {
sa = 0;
}
}
*iter++ = sa;
}
}
#endif
namespace Tins {
/** \endcond */
@@ -136,11 +189,88 @@ HWAddress<6> resolve_hwaddr(IPv4Address ip, PacketSender& sender) {
return resolve_hwaddr(sender.default_interface(), ip, sender);
}
#if defined(BSD) || defined(__FreeBSD_kernel__)
vector<RouteEntry> route_entries() {
vector<RouteEntry> entries;
route_entries(back_inserter(entries));
return entries;
vector<RouteEntry> output;
vector<char> buffer = query_route_table();
char* next = &buffer[0], *end = &buffer[buffer.size()];
rt_msghdr* rtm;
vector<sockaddr*> sa(RTAX_MAX);
char iface_name[IF_NAMESIZE];
while (next < end) {
rtm = (rt_msghdr*)next;
parse_header(rtm, sa.begin());
if (sa[RTAX_DST] && sa[RTAX_GATEWAY] && if_indextoname(rtm->rtm_index, iface_name)) {
RouteEntry entry;
entry.destination = IPv4Address(((struct sockaddr_in *)sa[RTAX_DST])->sin_addr.s_addr);
entry.gateway = IPv4Address(((struct sockaddr_in *)sa[RTAX_GATEWAY])->sin_addr.s_addr);
if (sa[RTAX_GENMASK]) {
entry.mask = IPv4Address(((struct sockaddr_in *)sa[RTAX_GENMASK])->sin_addr.s_addr);
}
else {
entry.mask = IPv4Address(uint32_t());
}
entry.interface = iface_name;
entry.metric = 0;
output.push_back(entry);
}
next += rtm->rtm_msglen;
}
return output;
}
#elif defined(_WIN32)
vector<RouteEntry> route_entries() {
vector<RouteEntry> output;
MIB_IPFORWARDTABLE* table;
ULONG size = 0;
GetIpForwardTable(0, &size, 0);
vector<uint8_t> buffer(size);
table = (MIB_IPFORWARDTABLE*)&buffer[0];
GetIpForwardTable(table, &size, 0);
for (DWORD i = 0; i < table->dwNumEntries; i++) {
MIB_IPFORWARDROW* row = &table->table[i];
if (row->dwForwardType == MIB_IPROUTE_TYPE_INDIRECT ||
row->dwForwardType == MIB_IPROUTE_TYPE_DIRECT) {
RouteEntry entry;
entry.interface = NetworkInterface::from_index(row->dwForwardIfIndex).name();
entry.destination = IPv4Address(row->dwForwardDest);
entry.mask = IPv4Address(row->dwForwardMask);
entry.gateway = IPv4Address(row->dwForwardNextHop);
entry.metric = row->dwForwardMetric1;
output.push_back(entry);
}
}
return output;
}
#else
vector<RouteEntry> route_entries() {
using namespace Tins::Internals;
vector<RouteEntry> output;
ifstream input("/proc/net/route");
string destination, mask, metric, gw;
uint32_t dummy;
skip_line(input);
RouteEntry entry;
while (input >> entry.interface >> destination >> gw) {
for (unsigned i(0); i < 4; ++i) {
input >> metric;
}
input >> mask;
from_hex(destination, dummy);
entry.destination = IPv4Address(dummy);
from_hex(mask, dummy);
entry.mask = IPv4Address(dummy);
from_hex(gw, dummy);
entry.gateway = IPv4Address(dummy);
from_hex(metric, dummy);
entry.metric = dummy;
skip_line(input);
output.push_back(entry);
}
return output;
}
#endif
bool gateway_from_ip(IPv4Address ip, IPv4Address& gw_addr) {
typedef vector<RouteEntry> entries_type;
@@ -156,11 +286,36 @@ bool gateway_from_ip(IPv4Address ip, IPv4Address& gw_addr) {
return false;
}
#ifdef _WIN32
set<string> network_interfaces() {
InterfaceCollector collector;
generic_iface_loop(collector);
return collector.ifaces;
set<string> output;
ULONG size;
::GetAdaptersAddresses(AF_INET, 0, 0, 0, &size);
std::vector<uint8_t> buffer(size);
if (::GetAdaptersAddresses(AF_INET, 0, 0, (IP_ADAPTER_ADDRESSES *)&buffer[0], &size) == ERROR_SUCCESS) {
PIP_ADAPTER_ADDRESSES iface = (IP_ADAPTER_ADDRESSES *)&buffer[0];
while (iface) {
output.insert(iface->AdapterName);
iface = iface->Next;
}
}
return output;
}
#else
set<string> network_interfaces() {
set<string> output;
struct ifaddrs* ifaddrs = 0;
struct ifaddrs* if_it = 0;
getifaddrs(&ifaddrs);
for (if_it = ifaddrs; if_it; if_it = if_it->ifa_next) {
output.insert(if_it->ifa_name);
}
if (ifaddrs) {
freeifaddrs(ifaddrs);
}
return output;
}
#endif // _WIN32
uint16_t channel_to_mhz(uint16_t channel) {
return 2407 + (channel * 5);