diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/ping.c | 67 |
1 files changed, 30 insertions, 37 deletions
diff --git a/networking/ping.c b/networking/ping.c index d8a3b772f..52e48867e 100644 --- a/networking/ping.c +++ b/networking/ping.c @@ -28,6 +28,7 @@ #include <net/if.h> #include <netinet/ip_icmp.h> #include "busybox.h" + #if ENABLE_PING6 #include <netinet/icmp6.h> /* I see RENUMBERED constants in bits/in.h - !!? @@ -85,7 +86,7 @@ static void noresp(int ign ATTRIBUTE_UNUSED) exit(EXIT_FAILURE); } -static void ping(len_and_sockaddr *lsa) +static void ping4(len_and_sockaddr *lsa) { struct sockaddr_in pingaddr; struct icmp *pkt; @@ -222,7 +223,7 @@ int ping_main(int argc, char **argv) ping6(lsa); else #endif - ping(lsa); + ping4(lsa); printf("%s is alive!\n", hostname); return EXIT_SUCCESS; } @@ -300,7 +301,25 @@ static void pingstats(int junk ATTRIBUTE_UNUSED) exit(status); } -static void sendping(int junk ATTRIBUTE_UNUSED) +static void sendping_tail(void (*sp)(int), int sz, int sizeof_packet) +{ + if (sz < 0) + bb_perror_msg_and_die("sendto"); + if (sz != sizeof_packet) + bb_error_msg_and_die("ping wrote %d chars; %d expected", sz, + sizeof_packet); + + signal(SIGALRM, sp); + if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */ + alarm(PINGINTERVAL); + } else { /* done, wait for the last ping to come back */ + /* todo, don't necessarily need to wait so long... */ + signal(SIGALRM, pingstats); + alarm(MAXWAIT); + } +} + +static void sendping4(int junk ATTRIBUTE_UNUSED) { struct icmp *pkt; int i; @@ -322,20 +341,7 @@ static void sendping(int junk ATTRIBUTE_UNUSED) i = sendto(pingsock, packet, sizeof(packet), 0, &pingaddr.sa, sizeof(pingaddr.sin)); - if (i < 0) - bb_perror_msg_and_die("sendto"); - if ((size_t)i != sizeof(packet)) - bb_error_msg_and_die("ping wrote %d chars; %d expected", i, - (int)sizeof(packet)); - - signal(SIGALRM, sendping); - if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */ - alarm(PINGINTERVAL); - } else { /* done, wait for the last ping to come back */ - /* todo, don't necessarily need to wait so long... */ - signal(SIGALRM, pingstats); - alarm(MAXWAIT); - } + sendping_tail(sendping4, i, sizeof(packet)); } #if ENABLE_PING6 static void sendping6(int junk ATTRIBUTE_UNUSED) @@ -359,20 +365,7 @@ static void sendping6(int junk ATTRIBUTE_UNUSED) i = sendto(pingsock, packet, sizeof(packet), 0, &pingaddr.sa, sizeof(pingaddr.sin6)); - if (i < 0) - bb_perror_msg_and_die("sendto"); - if ((size_t)i != sizeof(packet)) - bb_error_msg_and_die("ping wrote %d chars; %d expected", i, - (int)sizeof(packet)); - - signal(SIGALRM, sendping6); - if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */ - alarm(PINGINTERVAL); - } else { /* done, wait for the last ping to come back */ - /* todo, don't necessarily need to wait so long... */ - signal(SIGALRM, pingstats); - alarm(MAXWAIT); - } + sendping_tail(sendping6, i, sizeof(packet)); } #endif @@ -424,7 +417,7 @@ static char *icmp6_type_name(int id) } #endif -static void unpack(char *buf, int sz, struct sockaddr_in *from) +static void unpack4(char *buf, int sz, struct sockaddr_in *from) { struct icmp *icmppkt; struct iphdr *iphdr; @@ -560,7 +553,7 @@ static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimi } #endif -static void ping(len_and_sockaddr *lsa) +static void ping4(len_and_sockaddr *lsa) { char packet[datalen + MAXIPLEN + MAXICMPLEN]; int sockopt; @@ -588,7 +581,7 @@ static void ping(len_and_sockaddr *lsa) signal(SIGINT, pingstats); /* start the ping's going ... */ - sendping(0); + sendping4(0); /* listen for replies */ while (1) { @@ -603,7 +596,7 @@ static void ping(len_and_sockaddr *lsa) bb_perror_msg("recvfrom"); continue; } - unpack(packet, c, &from); + unpack4(packet, c, &from); if (pingcount > 0 && nreceived >= pingcount) break; } @@ -730,7 +723,7 @@ int ping_main(int argc, char **argv) datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */ - /* exactly one argument needed, -v and -q don't mix. So do 4, 6 */ + /* exactly one argument needed, -v and -q don't mix */ opt_complementary = "=1:q--v:v--q"; getopt32(argc, argv, OPT_STRING, &opt_c, &opt_s, &opt_I); if (option_mask32 & OPT_c) pingcount = xatoul(opt_c); // -c @@ -758,7 +751,7 @@ int ping_main(int argc, char **argv) ping6(lsa); else #endif - ping(lsa); + ping4(lsa); pingstats(0); return EXIT_SUCCESS; } |