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authorDenys Vlasenko <vda.linux@googlemail.com>2013-06-27 22:30:46 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2013-06-27 22:30:46 (GMT)
commit59f46676a9c03303809f40d1a27c4d2e9e640697 (patch)
treecb95d1c4f3da2e3ebc9358917a2aac3dafa6cc50
parent4928e9f7d0a17898300f20567a331417fafc16c1 (diff)
downloadbusybox-59f46676a9c03303809f40d1a27c4d2e9e640697.tar.gz
busybox-59f46676a9c03303809f40d1a27c4d2e9e640697.tar.bz2
Move create_icmp[6]_socket to its only user, and simplify it
function old new delta run_applet_and_exit 711 714 +3 sendping_tail 239 236 -3 common_ping_main 1798 1770 -28 create_icmp_socket 65 - -65 create_icmp6_socket 65 - -65 ------------------------------------------------------------------------------ (add/remove: 0/4 grow/shrink: 1/2 up/down: 3/-161) Total: -158 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--include/libbb.h3
-rw-r--r--libbb/Kbuild.src2
-rw-r--r--libbb/create_icmp6_socket.c38
-rw-r--r--libbb/create_icmp_socket.c36
-rw-r--r--networking/ping.c64
5 files changed, 44 insertions, 99 deletions
diff --git a/include/libbb.h b/include/libbb.h
index 65c6b9f..0852104 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1109,9 +1109,6 @@ void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
/* Networking */
-int create_icmp_socket(void) FAST_FUNC;
-int create_icmp6_socket(void) FAST_FUNC;
-/* interface.c */
/* This structure defines protocol families and their handlers. */
struct aftype {
const char *name;
diff --git a/libbb/Kbuild.src b/libbb/Kbuild.src
index 61eec26..c5d86c0 100644
--- a/libbb/Kbuild.src
+++ b/libbb/Kbuild.src
@@ -27,8 +27,6 @@ lib-y += concat_subpath_file.o
lib-y += copy_file.o
lib-y += copyfd.o
lib-y += crc32.o
-lib-y += create_icmp6_socket.o
-lib-y += create_icmp_socket.o
lib-y += default_error_retval.o
lib-y += device_open.o
lib-y += dump.o
diff --git a/libbb/create_icmp6_socket.c b/libbb/create_icmp6_socket.c
deleted file mode 100644
index 368c690..0000000
--- a/libbb/create_icmp6_socket.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Utility routines.
- *
- * create raw socket for icmp (IPv6 version) protocol
- * and drop root privileges if running setuid
- *
- * Licensed under GPLv2, see file LICENSE in this source tree.
- */
-
-#include "libbb.h"
-
-#if ENABLE_FEATURE_IPV6
-int FAST_FUNC create_icmp6_socket(void)
-{
- int sock;
-#if 0
- struct protoent *proto;
- proto = getprotobyname("ipv6-icmp");
- /* if getprotobyname failed, just silently force
- * proto->p_proto to have the correct value for "ipv6-icmp" */
- sock = socket(AF_INET6, SOCK_RAW,
- (proto ? proto->p_proto : IPPROTO_ICMPV6));
-#else
- sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
-#endif
- 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);
- }
-
- /* drop root privs if running setuid */
- xsetuid(getuid());
-
- return sock;
-}
-#endif
diff --git a/libbb/create_icmp_socket.c b/libbb/create_icmp_socket.c
deleted file mode 100644
index 5856269..0000000
--- a/libbb/create_icmp_socket.c
+++ /dev/null
@@ -1,36 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Utility routines.
- *
- * create raw socket for icmp protocol
- * and drop root privileges if running setuid
- *
- * Licensed under GPLv2, see file LICENSE in this source tree.
- */
-
-#include "libbb.h"
-
-int FAST_FUNC create_icmp_socket(void)
-{
- int sock;
-#if 0
- struct protoent *proto;
- proto = getprotobyname("icmp");
- /* if getprotobyname failed, just silently force
- * proto->p_proto to have the correct value for "icmp" */
- sock = socket(AF_INET, SOCK_RAW,
- (proto ? proto->p_proto : 1)); /* 1 == ICMP */
-#else
- sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
-#endif
- 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);
- }
-
- /* drop root privs if running setuid */
- xsetuid(getuid());
-
- return sock;
-}
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