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udhcpc: exit if iface disappeared; use correct MAC if it changes

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function                                             old     new   delta
udhcpc_main                                         2560    2618     +58

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-10-20 22:26:38 +02:00
parent c72c1d7b31
commit 5d374e9b14
1 changed files with 14 additions and 6 deletions
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20
networking/udhcp/dhcpc.c
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@ -928,6 +928,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
uint8_t *temp, *message;
const char *str_V, *str_h, *str_F, *str_r;
IF_FEATURE_UDHCP_PORT(char *str_P;)
void *clientid_mac_ptr;
llist_t *list_O = NULL;
llist_t *list_x = NULL;
int tryagain_timeout = 20;
@ -1004,7 +1005,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
IF_FEATURE_UDHCP_PORT( OPT_P = 1 << OPTBIT_P,)
};
/* Default options. */
/* Default options */
IF_FEATURE_UDHCP_PORT(SERVER_PORT = 67;)
IF_FEATURE_UDHCP_PORT(CLIENT_PORT = 68;)
client_config.interface = "eth0";
@ -1086,11 +1087,13 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
return 1;
}
clientid_mac_ptr = NULL;
if (!(opt & OPT_C) && !udhcp_find_option(client_config.options, DHCP_CLIENT_ID)) {
/* not suppressed and not set, set the default client ID */
client_config.clientid = alloc_dhcp_option(DHCP_CLIENT_ID, "", 7);
client_config.clientid[OPT_DATA] = 1; /* type: ethernet */
memcpy(client_config.clientid + OPT_DATA+1, client_config.client_mac, 6);
clientid_mac_ptr = client_config.clientid + OPT_DATA+1;
memcpy(clientid_mac_ptr, client_config.client_mac, 6);
}
if (str_V[0] != '\0')
client_config.vendorclass = alloc_dhcp_option(DHCP_VENDOR, str_V, 0);
@ -1173,10 +1176,15 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
* or if the status of the bridge changed).
* Refresh ifindex and client_mac:
*/
udhcp_read_interface(client_config.interface,
&client_config.ifindex,
NULL,
client_config.client_mac);
if (udhcp_read_interface(client_config.interface,
&client_config.ifindex,
NULL,
client_config.client_mac)
) {
return 1; /* iface is gone? */
}
if (clientid_mac_ptr)
memcpy(clientid_mac_ptr, client_config.client_mac, 6);
/* We will restart the wait in any case */
already_waited_sec = 0;