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authorDenis Vlasenko2006-09-02 16:17:30 +0000
committerDenis Vlasenko2006-09-02 16:17:30 +0000
commit2cbe6e6eb237a8f51139be4d450997a0317ec593 (patch)
tree30bc665ee14823b8a6d34e309a14655d24b6eb93 /networking/ping.c
parentdb7f2e5881b9ae40896d7660cd2f2446f514c72d (diff)
downloadbusybox-2cbe6e6eb237a8f51139be4d450997a0317ec593.zip
busybox-2cbe6e6eb237a8f51139be4d450997a0317ec593.tar.gz
ping: implement -I option
Diffstat (limited to 'networking/ping.c')
-rw-r--r--networking/ping.c61
1 files changed, 51 insertions, 10 deletions
diff --git a/networking/ping.c b/networking/ping.c
index 967a3e3..18fb926 100644
--- a/networking/ping.c
+++ b/networking/ping.c
@@ -155,6 +155,7 @@ int ping_main(int argc, char **argv)
#else /* ! CONFIG_FEATURE_FANCY_PING */
/* full(er) version */
static struct sockaddr_in pingaddr;
+static struct sockaddr_in sourceaddr;
static int pingsock = -1;
static int datalen; /* intentionally uninitialized to work around gcc bug */
@@ -264,16 +265,15 @@ static void unpack(char *buf, int sz, struct sockaddr_in *from)
gettimeofday(&tv, NULL);
- /* check IP header */
- iphdr = (struct iphdr *) buf;
- hlen = iphdr->ihl << 2;
/* discard if too short */
if (sz < (datalen + ICMP_MINLEN))
return;
+ /* check IP header */
+ iphdr = (struct iphdr *) buf;
+ hlen = iphdr->ihl << 2;
sz -= hlen;
icmppkt = (struct icmp *) (buf + hlen);
-
if (icmppkt->icmp_id != myid)
return; /* not our ping */
@@ -329,12 +329,17 @@ static void ping(const char *host)
pingsock = create_icmp_socket();
+ if (sourceaddr.sin_addr.s_addr) {
+ if (bind(pingsock, (struct sockaddr*)&sourceaddr, sizeof(sourceaddr)) == -1)
+ bb_error_msg_and_die("could not bind to address");
+ }
+
memset(&pingaddr, 0, sizeof(struct sockaddr_in));
pingaddr.sin_family = AF_INET;
hostent = xgethostbyname(host);
if (hostent->h_addrtype != AF_INET)
- bb_error_msg_and_die("unknown address type; only AF_INET is currently supported.");
+ bb_error_msg_and_die("unknown address type; only AF_INET is currently supported");
memcpy(&pingaddr.sin_addr, hostent->h_addr, sizeof(pingaddr.sin_addr));
@@ -348,10 +353,14 @@ static void ping(const char *host)
setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
sizeof(sockopt));
- printf("PING %s (%s): %d data bytes\n",
- hostent->h_name,
- inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr),
- datalen);
+ printf("PING %s (%s)",
+ hostent->h_name,
+ inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr));
+ if (sourceaddr.sin_addr.s_addr) {
+ printf(" from %s",
+ inet_ntoa(*(struct in_addr *) &sourceaddr.sin_addr.s_addr));
+ }
+ printf(": %d data bytes\n", datalen);
signal(SIGINT, pingstats);
@@ -378,6 +387,27 @@ static void ping(const char *host)
pingstats(0);
}
+/* TODO: consolidate ether-wake.c, dnsd.c, ifupdown.c, nslookup.c
+ * versions of below thing. BTW we have far too many "%u.%u.%u.%u" too...
+*/
+static int parse_nipquad(const char *str, struct sockaddr_in* addr)
+{
+ char dummy;
+ unsigned i1, i2, i3, i4;
+ if (sscanf(str, "%u.%u.%u.%u%c",
+ &i1, &i2, &i3, &i4, &dummy) == 4
+ && ( (i1|i2|i3|i4) <= 0xff )
+ ) {
+ uint8_t* ptr = (uint8_t*)&addr->sin_addr;
+ ptr[0] = i1;
+ ptr[1] = i2;
+ ptr[2] = i3;
+ ptr[3] = i4;
+ return 0;
+ }
+ return 1; /* error */
+}
+
int ping_main(int argc, char **argv)
{
char *thisarg;
@@ -386,7 +416,6 @@ int ping_main(int argc, char **argv)
argc--;
argv++;
- options = 0;
/* Parse any options */
while (argc >= 1 && **argv == '-') {
thisarg = *argv;
@@ -407,6 +436,18 @@ int ping_main(int argc, char **argv)
argv++;
datalen = atoi(*argv);
break;
+ case 'I':
+ if (--argc <= 0)
+ bb_show_usage();
+ argv++;
+/* ping6 accepts iface too:
+ if_index = if_nametoindex(*argv);
+ if (!if_index) ...
+ make it true for ping too. TODO.
+*/
+ if (parse_nipquad(*argv, &sourceaddr))
+ bb_show_usage();
+ break;
default:
bb_show_usage();
}