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Code Issues Releases Wiki Activity

Added Utils::route_entries to retrieve routing table entries.

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This commit is contained in:
Matias Fontanini
2012-06-07 11:45:51 -03:00
parent 4c30ebcddd
commit e4c0d74883
2 changed files with 65 additions and 39 deletions
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52
src/utils.cpp
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@@ -21,7 +21,6 @@
#include <stdexcept>
#include <sstream>
#include <fstream>
#include <stdexcept>
#include <cassert>
#include <cstring>
@@ -105,7 +104,7 @@ struct InterfaceInfoCollector {
}
};
bool from_hex(const string &str, uint32_t &result) {
bool Tins::Utils::Internals::from_hex(const string &str, uint32_t &result) {
unsigned i(0);
result = 0;
while(i < str.size()) {
@@ -122,7 +121,7 @@ bool from_hex(const string &str, uint32_t &result) {
return true;
}
void skip_line(istream &input) {
void Tins::Utils::Internals::skip_line(istream &input) {
int c = 0;
while(c != '\n' && input)
c = input.get();
@@ -248,46 +247,27 @@ bool Tins::Utils::resolve_hwaddr(const string &iface, IPv4Address ip,
string Tins::Utils::interface_from_ip(IPv4Address ip) {
if(ip == 0x7f000001)
return "lo";
ifstream input("/proc/net/route");
bool match(false);
string iface;
string destination, mask;
uint32_t destination_int, mask_int, ip_int = ip;
skip_line(input);
while(!match) {
input >> iface >> destination;
for(unsigned i(0); i < 6; ++i)
input >> mask;
from_hex(destination, destination_int);
from_hex(mask, mask_int);
if((ip_int & mask_int) == destination_int)
return iface;
skip_line(input);
std::vector<RouteEntry> entries;
uint32_t ip_int = ip;
route_entries(std::back_inserter(entries));
for(std::vector<RouteEntry>::const_iterator it(entries.begin()); it != entries.end(); ++it) {
std::cout << std::hex << ip_int << " " << (uint32_t)it->mask << " " << (uint32_t)it->destination << "\n";
if((ip_int & it->mask) == it->destination)
return it->interface;
}
return "";
}
bool Tins::Utils::gateway_from_ip(IPv4Address ip, IPv4Address &gw_addr) {
ifstream input("/proc/net/route");
bool match(false);
string iface;
string destination, mask, gw;
uint32_t destination_int, mask_int;
ip = Utils::net_to_host_l(ip);
skip_line(input);
while(!match) {
input >> iface >> destination >> gw;
for(unsigned i(0); i < 5; ++i)
input >> mask;
from_hex(destination, destination_int);
from_hex(mask, mask_int);
if((ip & mask_int) == destination_int) {
uint32_t tmp_ip;
from_hex(gw, tmp_ip);
gw_addr = net_to_host_l(tmp_ip);
std::vector<RouteEntry> entries;
uint32_t ip_int = ip;
route_entries(std::back_inserter(entries));
for(std::vector<RouteEntry>::const_iterator it(entries.begin()); it != entries.end(); ++it) {
std::cout << std::hex << ip_int << " " << (uint32_t)it->mask << " " << (uint32_t)it->destination << "\n";
if((ip_int & it->mask) == it->destination) {
gw_addr = it->gateway;
return true;
}
skip_line(input);
}
return false;
}