diff options
| -rw-r--r-- | networking/zcip.c | 87 |
1 files changed, 13 insertions, 74 deletions
diff --git a/networking/zcip.c b/networking/zcip.c index b5a904d..a6b034e 100644 --- a/networking/zcip.c +++ b/networking/zcip.c @@ -9,10 +9,6 @@ */ /* - * This can build as part of BusyBox or by itself: - * - * $(CROSS_COMPILE)cc -Os -Wall -DNO_BUSYBOX -DDEBUG -o zcip zcip.c - * * ZCIP just manages the 169.254.*.* addresses. That network is not * routed at the IP level, though various proxies or bridges can * certainly be used. Its naming is built over multicast DNS. @@ -26,22 +22,15 @@ // - avoid silent script failures, especially under load... // - link status monitoring (restart on link-up; stop on link-down) +#include "busybox.h" #include <errno.h> -#include <stdlib.h> -#include <stdio.h> #include <string.h> #include <syslog.h> #include <poll.h> #include <time.h> -#include <unistd.h> -#include <sys/ioctl.h> -#include <sys/types.h> #include <sys/wait.h> -#include <sys/socket.h> -#include <arpa/inet.h> -#include <netinet/in.h> #include <netinet/ether.h> #include <net/ethernet.h> #include <net/if.h> @@ -78,34 +67,20 @@ enum { DEFEND_INTERVAL = 10 }; -static const unsigned char ZCIP_VERSION[] = "0.75 (18 April 2005)"; -static char *prog; - static const struct in_addr null_ip = { 0 }; static const struct ether_addr null_addr = { {0, 0, 0, 0, 0, 0} }; static int verbose = 0; -#ifdef DEBUG - -#define DBG(fmt,args...) \ - fprintf(stderr, "%s: " fmt , prog , ## args) -#define VDBG(fmt,args...) do { \ - if (verbose) fprintf(stderr, "%s: " fmt , prog ,## args); \ - } while (0) -#else - #define DBG(fmt,args...) \ do { } while (0) #define VDBG DBG -#endif /* DEBUG */ /** * Pick a random link local IP address on 169.254/16, except that * the first and last 256 addresses are reserved. */ -static void -pick(struct in_addr *ip) +static void pick(struct in_addr *ip) { unsigned tmp; @@ -119,8 +94,7 @@ pick(struct in_addr *ip) /** * Broadcast an ARP packet. */ -static int -arp(int fd, struct sockaddr *saddr, int op, +static int arp(int fd, struct sockaddr *saddr, int op, const struct ether_addr *source_addr, struct in_addr source_ip, const struct ether_addr *target_addr, struct in_addr target_ip) { @@ -153,8 +127,7 @@ arp(int fd, struct sockaddr *saddr, int op, /** * Run a script. */ -static int -run(char *script, char *arg, char *intf, struct in_addr *ip) +static int run(char *script, char *arg, char *intf, struct in_addr *ip) { int pid, status; char *why; @@ -182,8 +155,8 @@ run(char *script, char *arg, char *intf, struct in_addr *ip) goto bad; } if (WEXITSTATUS(status) != 0) { - fprintf(stderr, "%s: script %s failed, exit=%d\n", - prog, script, WEXITSTATUS(status)); + bb_error_msg("script %s failed, exit=%d\n", + script, WEXITSTATUS(status)); return -errno; } } @@ -195,35 +168,11 @@ bad: return status; } -#ifndef NO_BUSYBOX -#include "busybox.h" -#endif - -/** - * Print usage information. - */ -static void ATTRIBUTE_NORETURN -zcip_usage(const char *msg) -{ - fprintf(stderr, "%s: %s\n", prog, msg); -#ifdef NO_BUSYBOX - fprintf(stderr, "Usage: %s [OPTIONS] ifname script\n" - "\t-f foreground mode (implied by -v)\n" - "\t-q quit after address (no daemon)\n" - "\t-r 169.254.x.x request this address first\n" - "\t-v verbose; show version\n", - prog); - exit(0); -#else - bb_show_usage(); -#endif -} /** * Return milliseconds of random delay, up to "secs" seconds. */ -static inline unsigned -ms_rdelay(unsigned secs) +static inline unsigned ms_rdelay(unsigned secs) { return lrand48() % (secs * 1000); } @@ -232,12 +181,6 @@ ms_rdelay(unsigned secs) * main program */ -#ifdef NO_BUSYBOX -int -main(int argc, char *argv[]) - __attribute__ ((weak, alias ("zcip_main"))); -#endif - int zcip_main(int argc, char *argv[]) { char *intf = NULL; @@ -259,7 +202,6 @@ int zcip_main(int argc, char *argv[]) int t; // parse commandline: prog [options] ifname script - prog = argv[0]; while ((t = getopt(argc, argv, "fqr:v")) != EOF) { switch (t) { case 'f': @@ -272,17 +214,15 @@ int zcip_main(int argc, char *argv[]) if (inet_aton(optarg, &ip) == 0 || (ntohl(ip.s_addr) & IN_CLASSB_NET) != LINKLOCAL_ADDR) { - zcip_usage("invalid link address"); + bb_error_msg_and_die("invalid link address"); } continue; case 'v': - if (!verbose) - printf("%s: version %s\n", prog, ZCIP_VERSION); verbose++; foreground = 1; continue; default: - zcip_usage("bad option"); + bb_error_msg_and_die("bad option"); } } if (optind < argc - 1) { @@ -291,8 +231,8 @@ int zcip_main(int argc, char *argv[]) script = argv[optind++]; } if (optind != argc || !intf) - zcip_usage("wrong number of arguments"); - openlog(prog, 0, LOG_DAEMON); + bb_show_usage(); + openlog(bb_applet_name, 0, LOG_DAEMON); // initialize the interface (modprobe, ifup, etc) if (run(script, "init", intf, NULL) < 0) @@ -447,8 +387,7 @@ fail: if (fds[0].revents & POLLERR) { // FIXME: links routinely go down; // this shouldn't necessarily exit. - fprintf(stderr, "%s %s: poll error\n", - prog, intf); + bb_error_msg("%s: poll error\n", intf); if (ready) { run(script, "deconfig", intf, &ip); @@ -536,6 +475,6 @@ bad: perror(why); else syslog(LOG_ERR, "%s %s, %s error: %s", - prog, intf, why, strerror(errno)); + bb_applet_name, intf, why, strerror(errno)); return EXIT_FAILURE; } |