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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>
This commit is contained in:
Denys Vlasenko
parent
4928e9f7d0
commit
59f46676a9
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@ -1109,9 +1109,6 @@ void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
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/* Networking */
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int create_icmp_socket(void) FAST_FUNC;
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int create_icmp6_socket(void) FAST_FUNC;
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/* interface.c */
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/* This structure defines protocol families and their handlers. */
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struct aftype {
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const char *name;
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@ -27,8 +27,6 @@ lib-y += concat_subpath_file.o
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lib-y += copy_file.o
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lib-y += copyfd.o
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lib-y += crc32.o
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lib-y += create_icmp6_socket.o
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lib-y += create_icmp_socket.o
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lib-y += default_error_retval.o
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lib-y += device_open.o
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lib-y += dump.o
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@ -1,38 +0,0 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* create raw socket for icmp (IPv6 version) protocol
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* and drop root privileges if running setuid
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
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#if ENABLE_FEATURE_IPV6
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int FAST_FUNC create_icmp6_socket(void)
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{
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int sock;
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#if 0
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struct protoent *proto;
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proto = getprotobyname("ipv6-icmp");
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/* if getprotobyname failed, just silently force
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* proto->p_proto to have the correct value for "ipv6-icmp" */
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sock = socket(AF_INET6, SOCK_RAW,
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(proto ? proto->p_proto : IPPROTO_ICMPV6));
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#else
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sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
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#endif
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if (sock < 0) {
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if (errno == EPERM)
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bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
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}
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/* drop root privs if running setuid */
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xsetuid(getuid());
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return sock;
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}
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#endif
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@ -1,36 +0,0 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* create raw socket for icmp protocol
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* and drop root privileges if running setuid
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
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int FAST_FUNC create_icmp_socket(void)
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{
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int sock;
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#if 0
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struct protoent *proto;
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proto = getprotobyname("icmp");
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/* if getprotobyname failed, just silently force
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* proto->p_proto to have the correct value for "icmp" */
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sock = socket(AF_INET, SOCK_RAW,
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(proto ? proto->p_proto : 1)); /* 1 == ICMP */
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#else
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sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
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#endif
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if (sock < 0) {
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if (errno == EPERM)
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bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
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}
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/* drop root privs if running setuid */
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xsetuid(getuid());
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return sock;
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}
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@ -149,8 +149,33 @@ enum {
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MAX_DUP_CHK = (8 * 128),
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MAXWAIT = 10,
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PINGINTERVAL = 1, /* 1 second */
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pingsock = 0,
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};
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static void
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#if ENABLE_PING6
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create_icmp_socket(len_and_sockaddr *lsa)
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#else
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create_icmp_socket(void)
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#define create_icmp_socket(lsa) create_icmp_socket()
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#endif
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{
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int sock;
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#if ENABLE_PING6
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if (lsa->u.sa.sa_family == AF_INET6)
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sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
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else
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#endif
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sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
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if (sock < 0) {
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if (errno == EPERM)
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bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
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}
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xmove_fd(sock, pingsock);
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}
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#if !ENABLE_FEATURE_FANCY_PING
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/* Simple version */
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@ -171,12 +196,10 @@ static void noresp(int ign UNUSED_PARAM)
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static void ping4(len_and_sockaddr *lsa)
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{
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struct icmp *pkt;
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int pingsock, c;
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pingsock = create_icmp_socket();
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int c;
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pkt = (struct icmp *) G.packet;
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memset(pkt, 0, sizeof(G.packet));
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/*memset(pkt, 0, sizeof(G.packet)); already is */
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pkt->icmp_type = ICMP_ECHO;
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pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet));
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@ -184,11 +207,15 @@ static void ping4(len_and_sockaddr *lsa)
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/* listen for replies */
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while (1) {
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#if 0
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struct sockaddr_in from;
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socklen_t fromlen = sizeof(from);
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c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
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(struct sockaddr *) &from, &fromlen);
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#else
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c = recv(pingsock, G.packet, sizeof(G.packet), 0);
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#endif
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if (c < 0) {
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if (errno != EINTR)
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bb_perror_msg("recvfrom");
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@ -210,13 +237,11 @@ static void ping4(len_and_sockaddr *lsa)
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static void ping6(len_and_sockaddr *lsa)
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{
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struct icmp6_hdr *pkt;
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int pingsock, c;
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int c;
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int sockopt;
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pingsock = create_icmp6_socket();
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pkt = (struct icmp6_hdr *) G.packet;
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memset(pkt, 0, sizeof(G.packet));
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/*memset(pkt, 0, sizeof(G.packet)); already is */
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pkt->icmp6_type = ICMP6_ECHO_REQUEST;
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sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
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@ -226,18 +251,21 @@ static void ping6(len_and_sockaddr *lsa)
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/* listen for replies */
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while (1) {
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#if 0
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struct sockaddr_in6 from;
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socklen_t fromlen = sizeof(from);
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c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
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(struct sockaddr *) &from, &fromlen);
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#else
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c = recv(pingsock, G.packet, sizeof(G.packet), 0);
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#endif
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if (c < 0) {
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if (errno != EINTR)
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bb_perror_msg("recvfrom");
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continue;
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}
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if (c >= ICMP_MINLEN) { /* icmp6_hdr */
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pkt = (struct icmp6_hdr *) G.packet;
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if (c >= ICMP_MINLEN) { /* icmp6_hdr */
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if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
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break;
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}
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@ -285,6 +313,7 @@ static int common_ping_main(sa_family_t af, char **argv)
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signal(SIGALRM, noresp);
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alarm(5); /* give the host 5000ms to respond */
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create_icmp_socket(lsa);
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#if ENABLE_PING6
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if (lsa->u.sa.sa_family == AF_INET6)
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ping6(lsa);
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@ -318,7 +347,6 @@ enum {
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struct globals {
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int pingsock;
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int if_index;
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char *str_I;
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len_and_sockaddr *source_lsa;
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@ -347,7 +375,6 @@ struct globals {
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char rcvd_tbl[MAX_DUP_CHK / 8];
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} FIX_ALIASING;
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#define G (*(struct globals*)&bb_common_bufsiz1)
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#define pingsock (G.pingsock )
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#define if_index (G.if_index )
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#define source_lsa (G.source_lsa )
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#define str_I (G.str_I )
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@ -369,7 +396,6 @@ void BUG_ping_globals_too_big(void);
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#define INIT_G() do { \
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if (sizeof(G) > COMMON_BUFSIZE) \
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BUG_ping_globals_too_big(); \
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pingsock = -1; \
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datalen = DEFDATALEN; \
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timeout = MAXWAIT; \
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tmin = UINT_MAX; \
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@ -655,7 +681,6 @@ static void ping4(len_and_sockaddr *lsa)
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{
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int sockopt;
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pingsock = create_icmp_socket();
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pingaddr.sin = lsa->u.sin;
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if (source_lsa) {
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if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
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@ -663,8 +688,6 @@ static void ping4(len_and_sockaddr *lsa)
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bb_error_msg_and_die("can't set multicast source interface");
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xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
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}
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if (str_I)
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setsockopt_bindtodevice(pingsock, str_I);
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/* enable broadcast pings */
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setsockopt_broadcast(pingsock);
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@ -713,13 +736,9 @@ static void ping6(len_and_sockaddr *lsa)
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struct iovec iov;
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char control_buf[CMSG_SPACE(36)];
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pingsock = create_icmp6_socket();
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pingaddr.sin6 = lsa->u.sin6;
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/* untested whether "-I addr" really works for IPv6: */
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if (source_lsa)
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xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
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if (str_I)
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setsockopt_bindtodevice(pingsock, str_I);
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#ifdef ICMP6_FILTER
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{
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@ -806,6 +825,11 @@ static void ping(len_and_sockaddr *lsa)
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}
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printf(": %d data bytes\n", datalen);
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create_icmp_socket(lsa);
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/* untested whether "-I addr" really works for IPv6: */
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if (str_I)
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setsockopt_bindtodevice(pingsock, str_I);
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G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
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G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
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#if ENABLE_PING6
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