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Code Issues Releases Wiki Activity

Utils::route_entries now works on BSD.

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This commit is contained in:
Matias Fontanini
2012-11-29 17:11:10 -03:00
parent 4036e7daa2
commit acff776d56
3 changed files with 84 additions and 6 deletions
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77
include/utils.h
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@@ -37,9 +37,20 @@
#include <iphlpapi.h>
#undef interface
#endif
#include "arch.h"
#ifdef BSD
#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"
@@ -293,7 +304,72 @@ namespace Tins {
}
}
}
#ifdef BSD
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("Failed to ioctl");
buf.resize(len);
if (sysctl(mib, 6, &buf[0], &len, NULL, 0) < 0) {
throw std::runtime_error("Failed to ioctl");
}
return buf;
}
template<typename ForwardIterator>
void parse_header(struct rt_msghdr *rtm, ForwardIterator iter)
{
char *ptr = (char *)(rtm + 1);
sockaddr *sa;
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;
}
}
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;
*output++ = entry;
}
next += rtm->rtm_msglen;
}
}
#else
template<class ForwardIterator>
void Tins::Utils::route_entries(ForwardIterator output) {
using namespace Utils::Internals;
@@ -316,5 +392,6 @@ void Tins::Utils::route_entries(ForwardIterator output) {
++output;
}
}
#endif
#endif // TINS_UTILS_H