diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/ipcalc.c | 44 | ||||
| -rw-r--r-- | networking/udhcp/arpping.c | 3 |
2 files changed, 23 insertions, 24 deletions
diff --git a/networking/ipcalc.c b/networking/ipcalc.c index 18abc12..7855849 100644 --- a/networking/ipcalc.c +++ b/networking/ipcalc.c @@ -75,29 +75,34 @@ int get_prefix(unsigned long netmask); #endif int ipcalc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int ipcalc_main(int argc, char **argv) +int ipcalc_main(int argc UNUSED_PARAM, char **argv) { unsigned opt; - int have_netmask = 0; - in_addr_t netmask, broadcast, network, ipaddr; - struct in_addr a; + bool have_netmask = 0; + struct in_addr s_netmask, s_broadcast, s_network, s_ipaddr; + /* struct in_addr { in_addr_t s_addr; } and in_addr_t + * (which in turn is just a typedef to uint32_t) + * are essentially the same type. A few macros for less verbosity: */ +#define netmask (s_netmask.s_addr) +#define broadcast (s_broadcast.s_addr) +#define network (s_network.s_addr) +#define ipaddr (s_ipaddr.s_addr) char *ipstr; #if ENABLE_FEATURE_IPCALC_LONG_OPTIONS applet_long_options = ipcalc_longopts; #endif opt = getopt32(argv, "mbn" IF_FEATURE_IPCALC_FANCY("phs")); - argc -= optind; argv += optind; + if (opt & SILENT) + logmode = LOGMODE_NONE; /* suppress error_msg() output */ if (opt & (BROADCAST | NETWORK | NETPREFIX)) { - if (argc > 2 || argc <= 0) + if (!argv[0] || !argv[1] || argv[2]) bb_show_usage(); } else { - if (argc != 1) + if (!argv[0] || argv[1]) bb_show_usage(); } - if (opt & SILENT) - logmode = LOGMODE_NONE; /* Suppress error_msg() output */ ipstr = argv[0]; if (ENABLE_FEATURE_IPCALC_FANCY) { @@ -108,8 +113,7 @@ int ipcalc_main(int argc, char **argv) while (*prefixstr) { if (*prefixstr == '/') { - *prefixstr = (char)0; - prefixstr++; + *prefixstr++ = '\0'; if (*prefixstr) { unsigned msk; netprefix = xatoul_range(prefixstr, 0, 32); @@ -130,42 +134,36 @@ int ipcalc_main(int argc, char **argv) prefixstr++; } } - ipaddr = inet_aton(ipstr, &a); - if (ipaddr == 0) { + if (inet_aton(ipstr, &s_ipaddr) == 0) { bb_error_msg_and_die("bad IP address: %s", argv[0]); } - ipaddr = a.s_addr; - if (argc == 2) { + if (argv[1]) { if (ENABLE_FEATURE_IPCALC_FANCY && have_netmask) { bb_error_msg_and_die("use prefix or netmask, not both"); } - - netmask = inet_aton(argv[1], &a); - if (netmask == 0) { + if (inet_aton(argv[1], &s_netmask) == 0) { bb_error_msg_and_die("bad netmask: %s", argv[1]); } - netmask = a.s_addr; } else { - /* JHC - If the netmask wasn't provided then calculate it */ if (!ENABLE_FEATURE_IPCALC_FANCY || !have_netmask) netmask = get_netmask(ipaddr); } if (opt & NETMASK) { - printf("NETMASK=%s\n", inet_ntoa((*(struct in_addr *) &netmask))); + printf("NETMASK=%s\n", inet_ntoa(s_netmask)); } if (opt & BROADCAST) { broadcast = (ipaddr & netmask) | ~netmask; - printf("BROADCAST=%s\n", inet_ntoa((*(struct in_addr *) &broadcast))); + printf("BROADCAST=%s\n", inet_ntoa(s_broadcast)); } if (opt & NETWORK) { network = ipaddr & netmask; - printf("NETWORK=%s\n", inet_ntoa((*(struct in_addr *) &network))); + printf("NETWORK=%s\n", inet_ntoa(s_network)); } if (ENABLE_FEATURE_IPCALC_FANCY) { diff --git a/networking/udhcp/arpping.c b/networking/udhcp/arpping.c index 548796e..cf18153 100644 --- a/networking/udhcp/arpping.c +++ b/networking/udhcp/arpping.c @@ -87,6 +87,7 @@ int FAST_FUNC arpping(uint32_t test_nip, /* wait for arp reply, and check it */ timeout_ms = 2000; do { + typedef uint32_t aliased_uint32_t FIX_ALIASING; int r; unsigned prevTime = monotonic_ms(); @@ -107,7 +108,7 @@ int FAST_FUNC arpping(uint32_t test_nip, && arp.operation == htons(ARPOP_REPLY) /* don't check it: Linux doesn't return proper tHaddr (fixed in 2.6.24?) */ /* && memcmp(arp.tHaddr, from_mac, 6) == 0 */ - && *((uint32_t *) arp.sInaddr) == test_nip + && *(aliased_uint32_t*)arp.sInaddr == test_nip ) { /* if ARP source MAC matches safe_mac * (which is client's MAC), then it's not a conflict |