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Code Issues Releases Wiki Activity

Added Utils::interface_info.

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This commit is contained in:
Matias Fontanini
2012-03-23 11:25:14 -03:00
parent 4235feb43e
commit e642dfa418
2 changed files with 62 additions and 0 deletions
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27
include/utils.h
View File

@@ -40,6 +40,14 @@ namespace Tins {
* conversions, interface listing, etc.
*/
namespace Utils {
/**
* \brief Struct that represents an interface's information.
*/
struct InterfaceInfo {
uint32_t ip_addr, netmask, bcast_addr;
uint8_t hw_addr[6];
};
/** \brief Convert a dotted-ip-notation string to an integer.
*
* \param ip A dotted ip notation string
@@ -121,8 +129,23 @@ namespace Tins {
* If the lookup fails, false will be returned, true otherwise.
* \param iface The interface from which to extract the ip address.
* \param ip The ip address found will be returned in this param.
*
* \return bool indicating wether the operation was successfull.
*/
bool interface_ip(const std::string &iface, uint32_t &ip);
/**
* \brief Lookup the ip/hw/netmask/broadcast address of the
* given interface.
*
* If the lookup fails, false will be returned, true otherwise.
* \param iface The interface from which to extract the ip address.
* \param info The InterfaceInfo in which the information will
* be stored.
*
* \return bool indicating wether the operation was successfull.
*/
bool interface_info(const std::string &iface, InterfaceInfo &info);
/**
* \brief Lookup the hardware address of the given interface.
@@ -131,6 +154,8 @@ namespace Tins {
* \param iface The interface from which to extract the hardware address.
* \param buffer The hw address will be stored in this buffer. It must
* be at least 6 bytes long.
*
* \return bool indicating wether the operation was successfull.
*/
bool interface_hwaddr(const std::string &iface, uint8_t *buffer);
@@ -140,6 +165,8 @@ namespace Tins {
* If the lookup fails, false will be returned, true otherwise.
* \param iface The interface from which to extract the identifier.
* \param id The interface id will be returned in this parameter.
*
* \return bool indicating wether the operation was successfull.
*/
bool interface_id(const std::string &iface, uint32_t &id);

35
src/utils.cpp
View File

@@ -49,6 +49,7 @@ struct InterfaceCollector {
}
};
/** \cond */
struct IPv4Collector {
uint32_t ip;
bool found;
@@ -64,6 +65,7 @@ struct IPv4Collector {
}
};
/** \cond */
struct HWAddressCollector {
uint8_t *result;
bool found;
@@ -79,6 +81,30 @@ struct HWAddressCollector {
}
};
/** \cond */
struct InterfaceInfoCollector {
Tins::Utils::InterfaceInfo *info;
const char *iface;
bool found;
InterfaceInfoCollector(Tins::Utils::InterfaceInfo *res, const char *interface) :
info(res), iface(interface), found(false) { }
void operator() (struct ifaddrs *addr) {
if(addr->ifa_addr->sa_family == AF_PACKET && !strcmp(addr->ifa_name, iface))
memcpy(info->hw_addr, ((struct sockaddr_ll*)addr->ifa_addr)->sll_addr, sizeof(info->hw_addr));
else if(addr->ifa_addr->sa_family == AF_INET && !strcmp(addr->ifa_name, iface)) {
info->ip_addr = ((struct sockaddr_in *)addr->ifa_addr)->sin_addr.s_addr;
info->netmask = ((struct sockaddr_in *)addr->ifa_netmask)->sin_addr.s_addr;
if((addr->ifa_flags & (IFF_BROADCAST | IFF_POINTOPOINT)))
info->bcast_addr = ((struct sockaddr_in *)addr->ifa_ifu.ifu_broadaddr)->sin_addr.s_addr;
else
info->bcast_addr = 0;
found = true;
}
}
};
bool from_hex(const string &str, uint32_t &result) {
unsigned i(0);
result = 0;
@@ -284,6 +310,15 @@ bool Tins::Utils::interface_hwaddr(const string &iface, uint8_t *buffer) {
return collector.found;
}
bool Tins::Utils::interface_info(const string &iface, InterfaceInfo &info) {
InterfaceInfoCollector collector(&info, iface.c_str());
generic_iface_loop(collector);
info.ip_addr = net_to_host_l(info.ip_addr);
info.netmask = net_to_host_l(info.netmask);
info.bcast_addr = net_to_host_l(info.bcast_addr);
return collector.found;
}
bool Tins::Utils::interface_id(const string &iface, uint32_t &id) {
id = if_nametoindex(iface.c_str());
return (((int32_t)id) != -1);