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| author | Denys Vlasenko | 2015-08-04 15:06:38 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2015-08-04 15:06:38 +0200 |
| commit | a83e3ae172dd516f8aa3e075a9cb292339606ed6 (patch) | |
| tree | 2c2c103e2954238165bf19f896b229f03200b87e /networking/zcip.c | |
| parent | e3475838354d6bba414ab8cdc2211313ad29dc9d (diff) | |
| download | busybox-a83e3ae172dd516f8aa3e075a9cb292339606ed6.zip busybox-a83e3ae172dd516f8aa3e075a9cb292339606ed6.tar.gz | |
zcip: tweak comments and make unsigned division more obvious
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/zcip.c')
| -rw-r--r-- | networking/zcip.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/networking/zcip.c b/networking/zcip.c index a167c7e..dba269b 100644 --- a/networking/zcip.c +++ b/networking/zcip.c @@ -56,9 +56,6 @@ struct arp_packet { } PACKED; enum { - /* 169.254.0.0 */ - LINKLOCAL_ADDR = 0xa9fe0000, - /* 0-1 seconds before sending 1st probe */ PROBE_WAIT = 1, /* 1-2 seconds between probes */ @@ -70,7 +67,7 @@ enum { /* if probe/announce sees a conflict, multiply RANDOM(NUM_CONFLICT) by... */ CONFLICT_MULTIPLIER = 2, /* if we monitor and see a conflict, how long is defend state? */ - DEFEND_INTERVAL = 10 + DEFEND_INTERVAL = 10, }; /* States during the configuration process. */ @@ -196,7 +193,7 @@ static int run(char *argv[3], const char *param, uint32_t nip) */ static ALWAYS_INLINE unsigned random_delay_ms(unsigned secs) { - return rand() % (secs * 1000); + return (unsigned)rand() % (secs * 1000); } /** @@ -328,9 +325,9 @@ int zcip_main(int argc UNUSED_PARAM, char **argv) // - start with some address we want to try // - short random delay // - arp probes to see if another host uses it - // 00:04:e2:64:23:c2 > ff:ff:ff:ff:ff:ff: arp who-has 169.254.194.171 tell 0.0.0.0 + // 00:04:e2:64:23:c2 > ff:ff:ff:ff:ff:ff arp who-has 169.254.194.171 tell 0.0.0.0 // - arp announcements that we're claiming it - // 00:04:e2:64:23:c2 > ff:ff:ff:ff:ff:ff: arp who-has 169.254.194.171 (00:04:e2:64:23:c2) tell 169.254.194.171 + // 00:04:e2:64:23:c2 > ff:ff:ff:ff:ff:ff arp who-has 169.254.194.171 (00:04:e2:64:23:c2) tell 169.254.194.171 // - use it // - defend it, within limits // exit if: @@ -412,7 +409,7 @@ int zcip_main(int argc UNUSED_PARAM, char **argv) // NOTE: all other exit paths should deconfig... if (QUIT) return EXIT_SUCCESS; - // fall through: switch_to_MONITOR + // fall through: switch to MONITOR default: // case DEFEND: // case MONITOR: (shouldn't happen, MONITOR timeout is infinite) @@ -520,7 +517,7 @@ int zcip_main(int argc UNUSED_PARAM, char **argv) } // Note: if we only have a target IP conflict here (ip_conflict & 2), // IOW: if we just saw this sort of ARP packet: - // aa:bb:cc:dd:ee:ff > xx:xx:xx:xx:xx:xx: arp who-has <chosen_nip> tell 0.0.0.0 + // aa:bb:cc:dd:ee:ff > xx:xx:xx:xx:xx:xx arp who-has <chosen_nip> tell 0.0.0.0 // we expect _kernel_ to respond to that, because <chosen_nip> // is (expected to be) configured on this iface. } // while (1) |