diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/traceroute.c | 106 |
1 files changed, 63 insertions, 43 deletions
diff --git a/networking/traceroute.c b/networking/traceroute.c index 773fc6a..2ba558f 100644 --- a/networking/traceroute.c +++ b/networking/traceroute.c @@ -22,9 +22,6 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -//#define version "1.4a12" - - /* * traceroute host - trace the route ip packets follow going to "host". * @@ -272,12 +269,12 @@ struct hostinfo { }; /* Data section of the probe packet */ -struct outdata { +typedef struct outdata { unsigned char seq; /* sequence number of this packet */ unsigned char ttl; /* ttl packet left with */ // UNUSED. Retaining to have the same packet size. struct timeval tv_UNUSED ATTRIBUTE_PACKED; /* time packet left */ -}; +} outdata_t; struct IFADDRLIST { uint32_t addr; @@ -285,37 +282,6 @@ struct IFADDRLIST { }; -static struct ip *outip; /* last output (udp) packet */ -static struct udphdr *outudp; /* last output (udp) packet */ -static struct outdata *outdata; /* last output (udp) packet */ - -#if ENABLE_FEATURE_TRACEROUTE_USE_ICMP -static struct icmp *outicmp; /* last output (icmp) packet */ -#endif - -static int s; /* receive (icmp) socket file descriptor */ -static int sndsock; /* send (udp/icmp) socket file descriptor */ - -static int packlen; /* total length of packet */ -static int minpacket; /* min ip packet size */ -static int maxpacket = 32 * 1024; /* max ip packet size */ -static int pmtu; /* Path MTU Discovery (RFC1191) */ - -static char *hostname; - -static uint16_t ident; -static uint16_t port = 32768 + 666; /* start udp dest port # for probe packets */ - -static int waittime = 5; /* time to wait for response (in seconds) */ -static int doipcksum = 1; /* calculate ip checksums by default */ - -#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE -static int optlen; /* length of ip options */ -#else -#define optlen 0 -#endif - - /* Keep in sync with getopt32 call! */ #define OPT_DONT_FRAGMNT (1<<0) /* F */ #define OPT_USE_ICMP (1<<1) /* I */ @@ -346,6 +312,36 @@ static int optlen; /* length of ip options */ struct globals { + struct ip *outip; /* last output (udp) packet */ + struct udphdr *outudp; /* last output (udp) packet */ + struct outdata *outdata; /* last output (udp) packet */ + +#if ENABLE_FEATURE_TRACEROUTE_USE_ICMP + struct icmp *outicmp; /* last output (icmp) packet */ +#endif + + int rcvsock; /* receive (icmp) socket file descriptor */ + int sndsock; /* send (udp/icmp) socket file descriptor */ + + int packlen; /* total length of packet */ + int minpacket; /* min ip packet size */ + int maxpacket; // 32 * 1024; /* max ip packet size */ + int pmtu; /* Path MTU Discovery (RFC1191) */ + + char *hostname; + + uint16_t ident; + uint16_t port; // 32768 + 666; /* start udp dest port # for probe packets */ + + int waittime; // 5; /* time to wait for response (in seconds) */ + int doipcksum; // 1; /* calculate ip checksums by default */ + +#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE + int optlen; /* length of ip options */ +#else +#define optlen 0 +#endif + struct sockaddr_storage whereto; /* Who to try to reach */ struct sockaddr_storage wherefrom; /* Who we are */ /* last inbound (icmp) packet */ @@ -359,11 +355,35 @@ struct globals { }; #define G (*ptr_to_globals) -#define INIT_G() PTR_TO_GLOBALS = xzalloc(sizeof(G)) +#define outip (G.outip ) +#define outudp (G.outudp ) +#define outdata (G.outdata ) +#define outicmp (G.outicmp ) +#define rcvsock (G.rcvsock ) +#define sndsock (G.sndsock ) +#define packlen (G.packlen ) +#define minpacket (G.minpacket) +#define maxpacket (G.maxpacket) +#define pmtu (G.pmtu ) +#define hostname (G.hostname ) +#define ident (G.ident ) +#define port (G.port ) +#define waittime (G.waittime ) +#define doipcksum (G.doipcksum) +#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE +#define optlen (G.optlen ) +#endif #define packet (G.packet ) #define whereto (G.whereto ) #define wherefrom (G.wherefrom) #define gwlist (G.gwlist ) +#define INIT_G() do { \ + PTR_TO_GLOBALS = xzalloc(sizeof(G)); \ + maxpacket = 32 * 1024; \ + port = 32768 + 666; \ + waittime = 5; \ + doipcksum = 1; \ +} while (0) /* @@ -1035,15 +1055,15 @@ int traceroute_main(int argc, char **argv) /* Ensure the socket fds won't be 0, 1 or 2 */ bb_sanitize_stdio(); - s = xsocket(AF_INET, SOCK_RAW, IPPROTO_ICMP); + rcvsock = xsocket(AF_INET, SOCK_RAW, IPPROTO_ICMP); #if TRACEROUTE_SO_DEBUG if (op & OPT_DEBUG) - setsockopt(s, SOL_SOCKET, SO_DEBUG, + setsockopt(rcvsock, SOL_SOCKET, SO_DEBUG, &const_int_1, sizeof(const_int_1)); #endif if (op & OPT_BYPASS_ROUTE) - setsockopt(s, SOL_SOCKET, SO_DONTROUTE, + setsockopt(rcvsock, SOL_SOCKET, SO_DONTROUTE, &const_int_1, sizeof(const_int_1)); sndsock = xsocket(AF_INET, SOCK_RAW, IPPROTO_RAW); @@ -1124,7 +1144,7 @@ int traceroute_main(int argc, char **argv) outicmp = (struct icmp *)outp; outicmp->icmp_type = ICMP_ECHO; outicmp->icmp_id = htons(ident); - outdata = (struct outdata *)(outp + 8); /* XXX magic number */ + outdata = (outdata_t *)(outp + 8); /* XXX magic number */ } else #endif { @@ -1132,7 +1152,7 @@ int traceroute_main(int argc, char **argv) outudp = (struct udphdr *)outp; outudp->source = htons(ident); outudp->len = htons((uint16_t)(packlen - (sizeof(*outip) + optlen))); - outdata = (struct outdata *)(outudp + 1); + outdata = (outdata_t *)(outudp + 1); } /* Get the interface address list */ @@ -1214,7 +1234,7 @@ int traceroute_main(int argc, char **argv) t1 = monotonic_us(); send_probe(++seq, ttl); ++sentfirst; - while ((cc = wait_for_reply(s, from)) != 0) { + while ((cc = wait_for_reply(rcvsock, from)) != 0) { t2 = monotonic_us(); i = packet_ok(packet, cc, from, seq); /* Skip short packet */ |