diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/ping.c | 64 |
1 files changed, 44 insertions, 20 deletions
diff --git a/networking/ping.c b/networking/ping.c index e919b3a..8c08c80 100644 --- a/networking/ping.c +++ b/networking/ping.c @@ -149,8 +149,33 @@ enum { MAX_DUP_CHK = (8 * 128), MAXWAIT = 10, PINGINTERVAL = 1, /* 1 second */ + pingsock = 0, }; +static void +#if ENABLE_PING6 +create_icmp_socket(len_and_sockaddr *lsa) +#else +create_icmp_socket(void) +#define create_icmp_socket(lsa) create_icmp_socket() +#endif +{ + int sock; +#if ENABLE_PING6 + if (lsa->u.sa.sa_family == AF_INET6) + sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6); + else +#endif + sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */ + if (sock < 0) { + if (errno == EPERM) + bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); + bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket); + } + + xmove_fd(sock, pingsock); +} + #if !ENABLE_FEATURE_FANCY_PING /* Simple version */ @@ -171,12 +196,10 @@ static void noresp(int ign UNUSED_PARAM) static void ping4(len_and_sockaddr *lsa) { struct icmp *pkt; - int pingsock, c; - - pingsock = create_icmp_socket(); + int c; pkt = (struct icmp *) G.packet; - memset(pkt, 0, sizeof(G.packet)); + /*memset(pkt, 0, sizeof(G.packet)); already is */ pkt->icmp_type = ICMP_ECHO; pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet)); @@ -184,11 +207,15 @@ static void ping4(len_and_sockaddr *lsa) /* listen for replies */ while (1) { +#if 0 struct sockaddr_in from; socklen_t fromlen = sizeof(from); c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0, (struct sockaddr *) &from, &fromlen); +#else + c = recv(pingsock, G.packet, sizeof(G.packet), 0); +#endif if (c < 0) { if (errno != EINTR) bb_perror_msg("recvfrom"); @@ -210,13 +237,11 @@ static void ping4(len_and_sockaddr *lsa) static void ping6(len_and_sockaddr *lsa) { struct icmp6_hdr *pkt; - int pingsock, c; + int c; int sockopt; - pingsock = create_icmp6_socket(); - pkt = (struct icmp6_hdr *) G.packet; - memset(pkt, 0, sizeof(G.packet)); + /*memset(pkt, 0, sizeof(G.packet)); already is */ pkt->icmp6_type = ICMP6_ECHO_REQUEST; sockopt = offsetof(struct icmp6_hdr, icmp6_cksum); @@ -226,18 +251,21 @@ static void ping6(len_and_sockaddr *lsa) /* listen for replies */ while (1) { +#if 0 struct sockaddr_in6 from; socklen_t fromlen = sizeof(from); c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0, (struct sockaddr *) &from, &fromlen); +#else + c = recv(pingsock, G.packet, sizeof(G.packet), 0); +#endif if (c < 0) { if (errno != EINTR) bb_perror_msg("recvfrom"); continue; } - if (c >= ICMP_MINLEN) { /* icmp6_hdr */ - pkt = (struct icmp6_hdr *) G.packet; + if (c >= ICMP_MINLEN) { /* icmp6_hdr */ if (pkt->icmp6_type == ICMP6_ECHO_REPLY) break; } @@ -285,6 +313,7 @@ static int common_ping_main(sa_family_t af, char **argv) signal(SIGALRM, noresp); alarm(5); /* give the host 5000ms to respond */ + create_icmp_socket(lsa); #if ENABLE_PING6 if (lsa->u.sa.sa_family == AF_INET6) ping6(lsa); @@ -318,7 +347,6 @@ enum { struct globals { - int pingsock; int if_index; char *str_I; len_and_sockaddr *source_lsa; @@ -347,7 +375,6 @@ struct globals { char rcvd_tbl[MAX_DUP_CHK / 8]; } FIX_ALIASING; #define G (*(struct globals*)&bb_common_bufsiz1) -#define pingsock (G.pingsock ) #define if_index (G.if_index ) #define source_lsa (G.source_lsa ) #define str_I (G.str_I ) @@ -369,7 +396,6 @@ void BUG_ping_globals_too_big(void); #define INIT_G() do { \ if (sizeof(G) > COMMON_BUFSIZE) \ BUG_ping_globals_too_big(); \ - pingsock = -1; \ datalen = DEFDATALEN; \ timeout = MAXWAIT; \ tmin = UINT_MAX; \ @@ -655,7 +681,6 @@ static void ping4(len_and_sockaddr *lsa) { int sockopt; - pingsock = create_icmp_socket(); pingaddr.sin = lsa->u.sin; if (source_lsa) { if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF, @@ -663,8 +688,6 @@ static void ping4(len_and_sockaddr *lsa) bb_error_msg_and_die("can't set multicast source interface"); xbind(pingsock, &source_lsa->u.sa, source_lsa->len); } - if (str_I) - setsockopt_bindtodevice(pingsock, str_I); /* enable broadcast pings */ setsockopt_broadcast(pingsock); @@ -713,13 +736,9 @@ static void ping6(len_and_sockaddr *lsa) struct iovec iov; char control_buf[CMSG_SPACE(36)]; - pingsock = create_icmp6_socket(); pingaddr.sin6 = lsa->u.sin6; - /* untested whether "-I addr" really works for IPv6: */ if (source_lsa) xbind(pingsock, &source_lsa->u.sa, source_lsa->len); - if (str_I) - setsockopt_bindtodevice(pingsock, str_I); #ifdef ICMP6_FILTER { @@ -806,6 +825,11 @@ static void ping(len_and_sockaddr *lsa) } printf(": %d data bytes\n", datalen); + create_icmp_socket(lsa); + /* untested whether "-I addr" really works for IPv6: */ + if (str_I) + setsockopt_bindtodevice(pingsock, str_I); + G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN; G.rcv_packet = xzalloc(G.sizeof_rcv_packet); #if ENABLE_PING6 |