diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/zcip.c | 41 |
1 files changed, 21 insertions, 20 deletions
diff --git a/networking/zcip.c b/networking/zcip.c index 330ec7af4..a7f19d5db 100644 --- a/networking/zcip.c +++ b/networking/zcip.c @@ -72,9 +72,8 @@ enum { DEFEND }; -#define DBG(fmt,args...) \ +#define VDBG(fmt,args...) \ do { } while (0) -#define VDBG DBG static unsigned long opts; #define FOREGROUND (opts & 1) @@ -86,7 +85,7 @@ static unsigned long opts; */ static void pick(struct in_addr *ip) { - unsigned tmp; + unsigned tmp; /* use cheaper math than lrand48() mod N */ do { @@ -95,10 +94,12 @@ static void pick(struct in_addr *ip) ip->s_addr = htonl((LINKLOCAL_ADDR + 0x0100) + tmp); } +/* TODO: we need a flag to direct bb_[p]error_msg output to stderr. */ + /** * Broadcast an ARP packet. */ -static int arp(int fd, struct sockaddr *saddr, int op, +static void 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) { @@ -127,14 +128,15 @@ static int arp(int fd, struct sockaddr *saddr, int op, perror("sendto"); else syslog(LOG_ERR, "sendto: %s", strerror(errno)); - return -errno; + //return -errno; } - return 0; + // Currently all callers ignore errors, that's why returns are + // commented out... + //return 0; } /** * Run a script. - * TODO: we need a flag to direct bb_[p]error_msg output to stderr. */ static int run(char *script, char *arg, char *intf, struct in_addr *ip) { @@ -233,22 +235,20 @@ int zcip_main(int argc, char *argv[]) char *r_opt; bb_opt_complementally = "vv"; // -v options accumulate opts = bb_getopt_ulflags(argc, argv, "fqr:v", &r_opt, &verbose); - if (opts & 4) { + if (opts & 4) { // -r n.n.n.n if (inet_aton(r_opt, &ip) == 0 || (ntohl(ip.s_addr) & IN_CLASSB_NET) != LINKLOCAL_ADDR) { bb_error_msg_and_die("invalid link address"); } } - if (verbose) opts |= 1; + if (verbose) opts |= 1; // -v implies -f argc -= optind; argv += optind; if (argc != 2) bb_show_usage(); - intf = argv[0]; script = argv[1]; setenv("interface", intf, 1); - openlog(bb_applet_name, 0, LOG_DAEMON); // initialize the interface (modprobe, ifup, etc) if (run(script, "init", intf, NULL) < 0) @@ -287,6 +287,7 @@ int zcip_main(int argc, char *argv[]) // daemonize now; don't delay system startup if (!FOREGROUND) { xdaemon(0, verbose); + openlog(bb_applet_name, 0, LOG_DAEMON); syslog(LOG_INFO, "start, interface %s", intf); } @@ -335,13 +336,13 @@ int zcip_main(int argc, char *argv[]) VDBG("state = %d\n", state); switch (state) { case PROBE: - // timeouts in the PROBE state means no conflicting ARP packets + // timeouts in the PROBE state mean no conflicting ARP packets // have been received, so we can progress through the states if (nprobes < PROBE_NUM) { nprobes++; VDBG("probe/%d %s@%s\n", nprobes, intf, inet_ntoa(ip)); - (void)arp(fd, &saddr, ARPOP_REQUEST, + arp(fd, &saddr, ARPOP_REQUEST, ð_addr, null_ip, &null_addr, ip); timeout = PROBE_MIN * 1000; @@ -354,32 +355,32 @@ int zcip_main(int argc, char *argv[]) nclaims = 0; VDBG("announce/%d %s@%s\n", nclaims, intf, inet_ntoa(ip)); - (void)arp(fd, &saddr, ARPOP_REQUEST, + arp(fd, &saddr, ARPOP_REQUEST, ð_addr, ip, ð_addr, ip); timeout = ANNOUNCE_INTERVAL * 1000; } break; case RATE_LIMIT_PROBE: - // timeouts in the RATE_LIMIT_PROBE state means no conflicting ARP packets + // timeouts in the RATE_LIMIT_PROBE state mean no conflicting ARP packets // have been received, so we can move immediately to the announce state state = ANNOUNCE; nclaims = 0; VDBG("announce/%d %s@%s\n", nclaims, intf, inet_ntoa(ip)); - (void)arp(fd, &saddr, ARPOP_REQUEST, + arp(fd, &saddr, ARPOP_REQUEST, ð_addr, ip, ð_addr, ip); timeout = ANNOUNCE_INTERVAL * 1000; break; case ANNOUNCE: - // timeouts in the ANNOUNCE state means no conflicting ARP packets + // timeouts in the ANNOUNCE state mean no conflicting ARP packets // have been received, so we can progress through the states if (nclaims < ANNOUNCE_NUM) { nclaims++; VDBG("announce/%d %s@%s\n", nclaims, intf, inet_ntoa(ip)); - (void)arp(fd, &saddr, ARPOP_REQUEST, + arp(fd, &saddr, ARPOP_REQUEST, ð_addr, ip, ð_addr, ip); timeout = ANNOUNCE_INTERVAL * 1000; @@ -394,7 +395,7 @@ int zcip_main(int argc, char *argv[]) conflicts = 0; timeout = -1; // Never timeout in the monitor state. - // NOTE: all other exit paths + // NOTE: all other exit paths // should deconfig ... if (QUIT) return EXIT_SUCCESS; @@ -518,7 +519,7 @@ int zcip_main(int argc, char *argv[]) VDBG("monitor conflict -- defending\n"); state = DEFEND; timeout = DEFEND_INTERVAL * 1000; - (void)arp(fd, &saddr, + arp(fd, &saddr, ARPOP_REQUEST, ð_addr, ip, ð_addr, ip); |