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traceroute: stop using global data/bss
(add/remove: 0/15 grow/shrink: 0/1 up/down: 0/-95) Total: -95 bytes text data bss dec hex filename 777245 1094 9008 787347 c0393 busybox_old 777206 1084 8976 787266 c0342 busybox_unstripped
This commit is contained in:
Denis Vlasenko
parent
4ca2965b99
commit
9ad2cb3f1a
@ -22,9 +22,6 @@
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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//#define version "1.4a12"
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/*
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* traceroute host - trace the route ip packets follow going to "host".
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*
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@ -272,12 +269,12 @@ struct hostinfo {
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};
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/* Data section of the probe packet */
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struct outdata {
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typedef struct outdata {
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unsigned char seq; /* sequence number of this packet */
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unsigned char ttl; /* ttl packet left with */
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// UNUSED. Retaining to have the same packet size.
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struct timeval tv_UNUSED ATTRIBUTE_PACKED; /* time packet left */
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};
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} outdata_t;
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struct IFADDRLIST {
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uint32_t addr;
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@ -285,37 +282,6 @@ struct IFADDRLIST {
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};
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static struct ip *outip; /* last output (udp) packet */
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static struct udphdr *outudp; /* last output (udp) packet */
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static struct outdata *outdata; /* last output (udp) packet */
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#if ENABLE_FEATURE_TRACEROUTE_USE_ICMP
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static struct icmp *outicmp; /* last output (icmp) packet */
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#endif
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static int s; /* receive (icmp) socket file descriptor */
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static int sndsock; /* send (udp/icmp) socket file descriptor */
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static int packlen; /* total length of packet */
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static int minpacket; /* min ip packet size */
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static int maxpacket = 32 * 1024; /* max ip packet size */
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static int pmtu; /* Path MTU Discovery (RFC1191) */
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static char *hostname;
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static uint16_t ident;
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static uint16_t port = 32768 + 666; /* start udp dest port # for probe packets */
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static int waittime = 5; /* time to wait for response (in seconds) */
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static int doipcksum = 1; /* calculate ip checksums by default */
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#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE
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static int optlen; /* length of ip options */
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#else
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#define optlen 0
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#endif
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/* Keep in sync with getopt32 call! */
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#define OPT_DONT_FRAGMNT (1<<0) /* F */
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#define OPT_USE_ICMP (1<<1) /* I */
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@ -346,6 +312,36 @@ static int optlen; /* length of ip options */
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struct globals {
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struct ip *outip; /* last output (udp) packet */
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struct udphdr *outudp; /* last output (udp) packet */
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struct outdata *outdata; /* last output (udp) packet */
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#if ENABLE_FEATURE_TRACEROUTE_USE_ICMP
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struct icmp *outicmp; /* last output (icmp) packet */
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#endif
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int rcvsock; /* receive (icmp) socket file descriptor */
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int sndsock; /* send (udp/icmp) socket file descriptor */
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int packlen; /* total length of packet */
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int minpacket; /* min ip packet size */
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int maxpacket; // 32 * 1024; /* max ip packet size */
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int pmtu; /* Path MTU Discovery (RFC1191) */
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char *hostname;
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uint16_t ident;
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uint16_t port; // 32768 + 666; /* start udp dest port # for probe packets */
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int waittime; // 5; /* time to wait for response (in seconds) */
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int doipcksum; // 1; /* calculate ip checksums by default */
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#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE
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int optlen; /* length of ip options */
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#else
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#define optlen 0
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#endif
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struct sockaddr_storage whereto; /* Who to try to reach */
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struct sockaddr_storage wherefrom; /* Who we are */
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/* last inbound (icmp) packet */
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@ -359,11 +355,35 @@ struct globals {
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};
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#define G (*ptr_to_globals)
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#define INIT_G() PTR_TO_GLOBALS = xzalloc(sizeof(G))
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#define outip (G.outip )
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#define outudp (G.outudp )
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#define outdata (G.outdata )
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#define outicmp (G.outicmp )
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#define rcvsock (G.rcvsock )
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#define sndsock (G.sndsock )
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#define packlen (G.packlen )
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#define minpacket (G.minpacket)
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#define maxpacket (G.maxpacket)
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#define pmtu (G.pmtu )
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#define hostname (G.hostname )
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#define ident (G.ident )
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#define port (G.port )
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#define waittime (G.waittime )
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#define doipcksum (G.doipcksum)
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#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE
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#define optlen (G.optlen )
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#endif
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#define packet (G.packet )
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#define whereto (G.whereto )
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#define wherefrom (G.wherefrom)
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#define gwlist (G.gwlist )
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#define INIT_G() do { \
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PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
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maxpacket = 32 * 1024; \
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port = 32768 + 666; \
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waittime = 5; \
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doipcksum = 1; \
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} while (0)
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/*
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@ -1035,15 +1055,15 @@ int traceroute_main(int argc, char **argv)
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/* Ensure the socket fds won't be 0, 1 or 2 */
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bb_sanitize_stdio();
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s = xsocket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
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rcvsock = xsocket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
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#if TRACEROUTE_SO_DEBUG
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if (op & OPT_DEBUG)
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setsockopt(s, SOL_SOCKET, SO_DEBUG,
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setsockopt(rcvsock, SOL_SOCKET, SO_DEBUG,
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&const_int_1, sizeof(const_int_1));
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#endif
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if (op & OPT_BYPASS_ROUTE)
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setsockopt(s, SOL_SOCKET, SO_DONTROUTE,
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setsockopt(rcvsock, SOL_SOCKET, SO_DONTROUTE,
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&const_int_1, sizeof(const_int_1));
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sndsock = xsocket(AF_INET, SOCK_RAW, IPPROTO_RAW);
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@ -1124,7 +1144,7 @@ int traceroute_main(int argc, char **argv)
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outicmp = (struct icmp *)outp;
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outicmp->icmp_type = ICMP_ECHO;
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outicmp->icmp_id = htons(ident);
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outdata = (struct outdata *)(outp + 8); /* XXX magic number */
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outdata = (outdata_t *)(outp + 8); /* XXX magic number */
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} else
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#endif
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{
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@ -1132,7 +1152,7 @@ int traceroute_main(int argc, char **argv)
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outudp = (struct udphdr *)outp;
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outudp->source = htons(ident);
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outudp->len = htons((uint16_t)(packlen - (sizeof(*outip) + optlen)));
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outdata = (struct outdata *)(outudp + 1);
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outdata = (outdata_t *)(outudp + 1);
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}
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/* Get the interface address list */
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@ -1214,7 +1234,7 @@ int traceroute_main(int argc, char **argv)
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t1 = monotonic_us();
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send_probe(++seq, ttl);
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++sentfirst;
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while ((cc = wait_for_reply(s, from)) != 0) {
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while ((cc = wait_for_reply(rcvsock, from)) != 0) {
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t2 = monotonic_us();
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i = packet_ok(packet, cc, from, seq);
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/* Skip short packet */
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