diff options
Diffstat (limited to 'route.c')
| -rw-r--r-- | route.c | 163 |
1 files changed, 104 insertions, 59 deletions
@@ -2324,70 +2324,26 @@ get_default_gateway (in_addr_t *ret, in_addr_t *netmask) #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> +#include <net/route.h> +#include <net/if_dl.h> -/* all of this is taken from <net/route.h> in Darwin */ -#define RTA_DST 0x1 -#define RTA_GATEWAY 0x2 -#define RTA_NETMASK 0x4 - -#define RTM_GET 0x4 -#define RTM_VERSION 5 - -#define RTF_UP 0x1 -#define RTF_GATEWAY 0x2 - -/* - * These numbers are used by reliable protocols for determining - * retransmission behavior and are included in the routing structure. - */ -struct rt_metrics { - u_long rmx_locks; /* Kernel must leave these values alone */ - u_long rmx_mtu; /* MTU for this path */ - u_long rmx_hopcount; /* max hops expected */ - u_long rmx_expire; /* lifetime for route, e.g. redirect */ - u_long rmx_recvpipe; /* inbound delay-bandwidth product */ - u_long rmx_sendpipe; /* outbound delay-bandwidth product */ - u_long rmx_ssthresh; /* outbound gateway buffer limit */ - u_long rmx_rtt; /* estimated round trip time */ - u_long rmx_rttvar; /* estimated rtt variance */ - u_long rmx_pksent; /* packets sent using this route */ - u_long rmx_filler[4]; /* will be used for T/TCP later */ -}; - -/* - * Structures for routing messages. - */ -struct rt_msghdr { - u_short rtm_msglen; /* to skip over non-understood messages */ - u_char rtm_version; /* future binary compatibility */ - u_char rtm_type; /* message type */ - u_short rtm_index; /* index for associated ifp */ - int rtm_flags; /* flags, incl. kern & message, e.g. DONE */ - int rtm_addrs; /* bitmask identifying sockaddrs in msg */ - pid_t rtm_pid; /* identify sender */ - int rtm_seq; /* for sender to identify action */ - int rtm_errno; /* why failed */ - int rtm_use; /* from rtentry */ - u_long rtm_inits; /* which metrics we are initializing */ - struct rt_metrics rtm_rmx; /* metrics themselves */ -}; - -struct { +struct rtmsg { struct rt_msghdr m_rtm; char m_space[512]; -} m_rtmsg; +}; #define ROUNDUP(a) \ - ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) + ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t)) -bool -get_default_gateway (in_addr_t *ret, in_addr_t *netmask) +static bool +get_default_gateway_ex (in_addr_t *ret, in_addr_t *netmask, char **ifname) { struct gc_arena gc = gc_new (); + struct rtmsg m_rtmsg; int s, seq, l, pid, rtm_addrs, i; struct sockaddr so_dst, so_mask; char *cp = m_rtmsg.m_space; - struct sockaddr *gate = NULL, *sa; + struct sockaddr *gate = NULL, *ifp = NULL, *sa; struct rt_msghdr *rtm_aux; #define NEXTADDR(w, u) \ @@ -2401,8 +2357,9 @@ get_default_gateway (in_addr_t *ret, in_addr_t *netmask) pid = getpid(); seq = 0; - rtm_addrs = RTA_DST | RTA_NETMASK; + rtm_addrs = RTA_DST | RTA_NETMASK | RTA_IFP; + bzero(&m_rtmsg, sizeof(m_rtmsg)); bzero(&so_dst, sizeof(so_dst)); bzero(&so_mask, sizeof(so_mask)); bzero(&rtm, sizeof(struct rt_msghdr)); @@ -2444,11 +2401,16 @@ get_default_gateway (in_addr_t *ret, in_addr_t *netmask) cp = ((char *)(rtm_aux + 1)); if (rtm_aux->rtm_addrs) { for (i = 1; i; i <<= 1) - if (i & rtm_aux->rtm_addrs) { - sa = (struct sockaddr *)cp; - if (i == RTA_GATEWAY ) - gate = sa; - ADVANCE(cp, sa); + { + if (i & rtm_aux->rtm_addrs) + { + sa = (struct sockaddr *)cp; + if (i == RTA_GATEWAY ) + gate = sa; + else if (i == RTA_IFP) + ifp = sa; + ADVANCE(cp, sa); + } } } else @@ -2471,6 +2433,16 @@ get_default_gateway (in_addr_t *ret, in_addr_t *netmask) *netmask = 0xFFFFFF00; // FIXME -- get the real netmask of the adapter containing the default gateway } + if (ifp && ifname) + { + struct sockaddr_dl *adl = (struct sockaddr_dl *) ifp; + char *name = malloc(adl->sdl_nlen+1); + check_malloc_return(name); + memcpy(name, adl->sdl_data, adl->sdl_nlen); + name[adl->sdl_nlen] = '\0'; + *ifname = name; + } + gc_free (&gc); return true; } @@ -2481,6 +2453,12 @@ get_default_gateway (in_addr_t *ret, in_addr_t *netmask) } } +bool +get_default_gateway (in_addr_t *ret, in_addr_t *netmask) +{ + return get_default_gateway_ex(ret, netmask, NULL); +} + #elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) #include <sys/types.h> @@ -2896,6 +2874,73 @@ get_default_gateway_mac_addr (unsigned char *macaddr) return false; } +#elif defined(TARGET_DARWIN) + +bool +get_default_gateway_mac_addr (unsigned char *macaddr) +{ +# define max(a,b) ((a) > (b) ? (a) : (b)) + struct gc_arena gc = gc_new (); + struct ifconf ifc; + struct ifreq *ifr; + char *buffer, *cp; + bool status = false; + in_addr_t gw = 0; + char *ifname = NULL; + int sockfd = -1; + const int bufsize = 4096; + + if (!get_default_gateway_ex (&gw, NULL, &ifname)) /* get interface name of default gateway */ + { + msg (M_WARN, "GDGMA: get_default_gateway_ex failed"); + goto done; + } + + if (!ifname) + { + msg (M_WARN, "GDGMA: cannot get default gateway ifname"); + goto done; + } + + buffer = (char *) gc_malloc (bufsize, true, &gc); + + sockfd = socket(AF_INET, SOCK_DGRAM, 0); + if (sockfd < 0) + { + msg (M_WARN, "GDGMA: socket failed"); + goto done; + } + + ifc.ifc_len = bufsize; + ifc.ifc_buf = buffer; + + if (ioctl(sockfd, SIOCGIFCONF, (char *)&ifc) < 0) + { + msg (M_WARN, "GDGMA: ioctl failed"); + goto done; + } + + for (cp = buffer; cp <= buffer + bufsize - sizeof(struct ifreq); ) + { + ifr = (struct ifreq *)cp; + if (ifr->ifr_addr.sa_family == AF_LINK && !strncmp(ifr->ifr_name, ifname, IFNAMSIZ)) + { + struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr; + memcpy(macaddr, LLADDR(sdl), 6); + status = true; + } + cp += sizeof(ifr->ifr_name) + max(sizeof(ifr->ifr_addr), ifr->ifr_addr.sa_len); + } + + done: + if (sockfd >= 0) + close (sockfd); + free (ifname); + gc_free (&gc); + return status; +# undef max +} + #else bool |