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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
include/utils.h
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@@ -29,6 +29,7 @@
#endif
#include <string>
#include <set>
#include <fstream>
#include <stdint.h>
#include "packetsender.h"
#include "ipaddress.h"
@@ -49,6 +50,14 @@ namespace Tins {
uint8_t hw_addr[6];
};
/**
* \brief Struct that represents an entry in /proc/net/route
*/
struct RouteEntry {
std::string interface;
IPv4Address destination, gateway, mask;
};
/** \brief Convert a dotted-ip-notation string to an integer.
*
* \param ip A dotted ip notation string
@@ -193,7 +202,16 @@ namespace Tins {
*
* \return bool indicating wether the lookup was successfull.
*/
bool gateway_from_ip(IPv4Address ip, IPv4Address &gw_addr) ;
bool gateway_from_ip(IPv4Address ip, IPv4Address &gw_addr);
/**
* \brief Retrieves entries int the routing table.
*
* \brief output ForwardIterator in which entries will be stored.
*/
template<class ForwardIterator>
void route_entries(ForwardIterator output);
/** \brief Convert 16 bit integer into network byte order.
@@ -275,7 +293,35 @@ namespace Tins {
if(ifaddrs)
freeifaddrs(ifaddrs);
}
};
};
namespace Internals {
void skip_line(std::istream &input);
bool from_hex(const std::string &str, uint32_t &result);
}
}
}
template<class ForwardIterator>
void Tins::Utils::route_entries(ForwardIterator output) {
using namespace Utils::Internals;
std::ifstream input("/proc/net/route");
std::string destination, mask, gw;
uint32_t dummy;
skip_line(input);
RouteEntry entry;
while(input >> entry.interface >> destination >> gw) {
for(unsigned i(0); i < 5; ++i)
input >> mask;
from_hex(destination, dummy);
entry.destination = net_to_host_l(dummy);
from_hex(mask, dummy);
entry.mask = net_to_host_l(dummy);
from_hex(gw, dummy);
entry.gateway = net_to_host_l(dummy);
skip_line(input);
*output = entry;
++output;
}
}
#endif