diff options
Diffstat (limited to 'tinyNET/src/tnet_utils.c')
| -rwxr-xr-x | tinyNET/src/tnet_utils.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/tinyNET/src/tnet_utils.c b/tinyNET/src/tnet_utils.c index 56a436a..31e9c13 100755 --- a/tinyNET/src/tnet_utils.c +++ b/tinyNET/src/tnet_utils.c @@ -962,14 +962,23 @@ int tnet_getbestsource(const char* destination, tnet_port_t port, tnet_socket_ty if (!ifa->ifa_addr || ifa->ifa_addr->sa_family != destAddr.ss_family) { continue; } + + if (destAddr.ss_family == AF_INET) { + if (tnet_is_linklocal(ifa->ifa_addr) ^ tnet_is_linklocal(((struct sockaddr *)&destAddr))) { + TSK_DEBUG_INFO("Ignoring IPv4 linklocal address"); + continue; + } + } if (destAddr.ss_family == AF_INET6) { if (IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *) ifa->ifa_addr)->sin6_addr) ^ IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *) &destAddr)->sin6_addr)) { + TSK_DEBUG_INFO("Ignoring IPv6 linklocal address"); continue; } if (IN6_IS_ADDR_SITELOCAL(&((struct sockaddr_in6 *) ifa->ifa_addr)->sin6_addr) ^ IN6_IS_ADDR_SITELOCAL(&((struct sockaddr_in6 *) &destAddr)->sin6_addr)) { + TSK_DEBUG_INFO("Ignoring IPv6 sitelocal address"); continue; } } @@ -1262,6 +1271,42 @@ int tnet_get_ip_n_port(tnet_fd_t fd, tsk_bool_t getlocal, tnet_ip_t *ip, tnet_po } /**@ingroup tnet_utils_group + */ +tsk_bool_t tnet_is_loopback(const struct sockaddr *sa) +{ + if (!sa || (sa->sa_family != AF_INET && sa->sa_family != AF_INET6)) { + TSK_DEBUG_ERROR("Invalid paramete"); + return tsk_false; + } + if (sa->sa_family == AF_INET) { + const uint8_t* u8 = (const uint8_t*)&((const struct sockaddr_in*)sa)->sin_addr; + return u8[0] == 127; + } + else { + const uint32_t* u32 = (const uint32_t*)&((const struct sockaddr_in6*)sa)->sin6_addr; + return (u32[0] == 0) && (u32[4] == 0) && (u32[8] == 0) && (u32[12] == tnet_ntohl(1)); + } +} + +/**@ingroup tnet_utils_group + */ +tsk_bool_t tnet_is_linklocal(const struct sockaddr *sa) +{ + if (!sa || (sa->sa_family != AF_INET && sa->sa_family != AF_INET6)) { + TSK_DEBUG_ERROR("Invalid paramete"); + return tsk_false; + } + if (sa->sa_family == AF_INET) { + const uint8_t* u8 = (const uint8_t*)&((const struct sockaddr_in*)sa)->sin_addr; + return u8[0] == 169 && u8[1] == 254; + } + else { + const uint8_t* u8 = (const uint8_t*)&((const struct sockaddr_in6*)sa)->sin6_addr; + return ((u8[0] == 0xfe) && ((u8[1] & 0xc0) == 0x80)); + } +} + +/**@ingroup tnet_utils_group * Gets the maximum number of file descriptors (FDs) this process is allowed to open. */ int tnet_get_fd_max_allowed(tsk_size_t* fd_size) |
