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Make ndhc use the new 'ip4' ifchd command.

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This commit is contained in:
Nicholas J. Kain 2014-03-09 13:57:37 -04:00
parent c4f09b1a9a
commit 06ff60bb6b
1 changed files with 50 additions and 9 deletions
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59
ndhc/ifchange.c
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@ -141,13 +141,11 @@ static int ifchd_cmd(char *buf, size_t buflen, uint8_t *optdata,
int (*dofn)(char *, size_t, char *, uint8_t *, ssize_t);
char *optname;
switch (code) {
IFCHD_SW_CMD(SUBNET, ip);
IFCHD_SW_CMD(DNS, iplist);
IFCHD_SW_CMD(LPRSVR, iplist);
IFCHD_SW_CMD(NTPSVR, iplist);
IFCHD_SW_CMD(WINS, iplist);
IFCHD_SW_CMD(ROUTER, ip);
IFCHD_SW_CMD(BROADCAST, ip);
IFCHD_SW_CMD(TIMEZONE, s32);
IFCHD_SW_CMD(HOSTNAME, str);
IFCHD_SW_CMD(DOMAIN, str);
@ -208,13 +206,58 @@ void ifchange_deconfig(void)
static size_t send_client_ip(char *out, size_t olen, struct dhcpmsg *packet)
{
char ip[32], ipb[64];
if (!memcmp(&packet->yiaddr, &cfg_packet.yiaddr, sizeof packet->yiaddr))
return 0;
static char snClassC[] = "255.255.255.0";
uint8_t optdata[MAX_DOPT_SIZE], olddata[MAX_DOPT_SIZE];
char ipb[4*INET_ADDRSTRLEN], ip[INET_ADDRSTRLEN], sn[INET_ADDRSTRLEN],
bc[INET_ADDRSTRLEN];
ssize_t optlen, oldlen;
bool change_ipaddr = false;
bool have_subnet = false;
bool change_subnet = false;
bool have_bcast = false;
bool change_bcast = false;
if (memcmp(&packet->yiaddr, &cfg_packet.yiaddr, sizeof packet->yiaddr))
change_ipaddr = true;
inet_ntop(AF_INET, &packet->yiaddr, ip, sizeof ip);
snprintf(ipb, sizeof ipb, "ip:%s;", ip);
optlen = get_dhcp_opt(packet, DCODE_SUBNET, optdata, sizeof optdata);
if (optlen >= 4) {
have_subnet = true;
inet_ntop(AF_INET, optdata, sn, sizeof sn);
oldlen = get_dhcp_opt(&cfg_packet, DCODE_SUBNET, olddata,
sizeof olddata);
if (oldlen != optlen || memcmp(optdata, olddata, optlen))
change_subnet = true;
}
optlen = get_dhcp_opt(packet, DCODE_BROADCAST, optdata, sizeof optdata);
if (optlen >= 4) {
have_bcast = true;
inet_ntop(AF_INET, optdata, bc, sizeof bc);
oldlen = get_dhcp_opt(&cfg_packet, DCODE_BROADCAST, olddata,
sizeof olddata);
if (oldlen != optlen || memcmp(optdata, olddata, optlen))
change_bcast = true;
}
// Nothing to change.
if (!change_ipaddr && !change_subnet && !change_bcast)
return 0;
if (!have_subnet) {
log_line("Server did not send a subnet mask. Assuming class C (255.255.255.0).");
memcpy(sn, snClassC, sizeof snClassC);
}
if (have_bcast) {
snprintf(ipb, sizeof ipb, "ip4:%s,%s,%s;", ip, sn, bc);
} else {
snprintf(ipb, sizeof ipb, "ip4:%s,%s;", ip, sn);
}
strnkcat(out, ipb, olen);
log_line("Sent to ifchd: %s", out);
log_line("Sent to ifchd: %s", ipb);
return strlen(ipb);
}
@ -253,13 +296,11 @@ void ifchange_bind(struct dhcpmsg *packet)
snprintf(buf, sizeof buf, CMD_INTERFACE ":%s;", client_config.interface);
tbs |= send_client_ip(buf, sizeof buf, packet);
tbs |= send_cmd(buf, sizeof buf, packet, DCODE_SUBNET);
tbs |= send_cmd(buf, sizeof buf, packet, DCODE_ROUTER);
tbs |= send_cmd(buf, sizeof buf, packet, DCODE_DNS);
tbs |= send_cmd(buf, sizeof buf, packet, DCODE_HOSTNAME);
tbs |= send_cmd(buf, sizeof buf, packet, DCODE_DOMAIN);
tbs |= send_cmd(buf, sizeof buf, packet, DCODE_MTU);
tbs |= send_cmd(buf, sizeof buf, packet, DCODE_BROADCAST);
tbs |= send_cmd(buf, sizeof buf, packet, DCODE_WINS);
if (tbs) {
sockfd = open_ifch();