Revert "RFC: dhcpv4 support openwrt alias ip addr"

1 files changed, 23 insertions, 43 deletions

diff --git a/src/dhcpv4.c b/src/dhcpv4.c
index 26cd5e1..a657e13 100644
--- a/src/dhcpv4.c
+++ b/src/dhcpv4.c
@@ -118,41 +118,19 @@ int setup_dhcpv4_interface(struct interface *iface, bool enable)
 			return -1;
 		}
 
-#ifndef WITH_UBUS
+		// Create a range if not specified
 		struct ifreq ifreq;
 		strncpy(ifreq.ifr_name, iface->ifname, sizeof(ifreq.ifr_name));
 
 		struct sockaddr_in *saddr = (struct sockaddr_in*)&ifreq.ifr_addr;
 		struct sockaddr_in *smask = (struct sockaddr_in*)&ifreq.ifr_netmask;
-
-		if (!ioctl(sock, SIOCGIFADDR, &ifreq)) {
+		if (!(iface->dhcpv4_start.s_addr & htonl(0xffff0000)) &&
+				!(iface->dhcpv4_end.s_addr & htonl(0xffff0000)) &&
+				!ioctl(sock, SIOCGIFADDR, &ifreq)) {
 			struct in_addr addr = saddr->sin_addr;
-			iface->dhcpv4_addr.s_addr = addr.s_addr;
+
 			ioctl(sock, SIOCGIFNETMASK, &ifreq);
 			struct in_addr mask = smask->sin_addr;
-			iface->dhcpv4_mask.s_addr = mask.s_addr;
-		}
-#else
-		const char* saddr = ubus_get_address4(iface->name);
-		struct in_addr addr;
-		inet_pton(AF_INET,saddr, &addr);
-		iface->dhcpv4_addr.s_addr = addr.s_addr;
-		int bits = ubus_get_mask4(iface->name);
-		struct in_addr mask;
-		if (bits < -32 || bits > 32)
-			bits = 0;
-
-		mask.s_addr = bits ? htonl(~((1 << (32 - abs(bits))) - 1)) : 0;
-		if (bits < 0)
-			mask.s_addr = ~mask.s_addr;
-
-		iface->dhcpv4_mask.s_addr = mask.s_addr;
-#endif
-
-		// Create a range if not specified
-		if (!(iface->dhcpv4_start.s_addr & htonl(0xffff0000)) &&
-				!(iface->dhcpv4_end.s_addr & htonl(0xffff0000)) &&
-				iface->dhcpv4_addr.s_addr) {
 
 			uint32_t start = ntohl(iface->dhcpv4_start.s_addr);
 			uint32_t end = ntohl(iface->dhcpv4_end.s_addr);
@@ -186,11 +164,6 @@ int setup_dhcpv4_interface(struct interface *iface, bool enable)
 
 
 		}
-		syslog(LOG_WARNING, "DHCPv4 dhcp addr  %s", inet_ntoa(iface->dhcpv4_addr));
-		syslog(LOG_WARNING, "DHCPv4 dhcp mask  %s", inet_ntoa(iface->dhcpv4_mask));
-		syslog(LOG_WARNING, "DHCPv4 dhcp start %s", inet_ntoa(iface->dhcpv4_start));
-		syslog(LOG_WARNING, "DHCPv4 dhcp end   %s", inet_ntoa(iface->dhcpv4_end));
-
 
 		// Parse static entries
 		struct lease *lease;
@@ -230,8 +203,8 @@ int setup_dhcpv4_interface(struct interface *iface, bool enable)
 		// Clean invalid assignments
 		struct dhcpv4_assignment *a, *n;
 		list_for_each_entry_safe(a, n, &iface->dhcpv4_assignments, head) {
-			if ((htonl(a->addr) & mask.s_addr) !=
-					(iface->dhcpv4_start.s_addr & mask.s_addr)) {
+			if ((htonl(a->addr) & smask->sin_addr.s_addr) !=
+					(iface->dhcpv4_start.s_addr & smask->sin_addr.s_addr)) {
 				list_del(&a->head);
 				free(a);
 			}
@@ -285,6 +258,8 @@ static void handle_dhcpv4(void *addr, void *data, size_t len,
 		return;
 
 	int sock = iface->dhcpv4_event.uloop.fd;
+	struct sockaddr_in ifaddr;
+	struct sockaddr_in ifnetmask;
 
 	syslog(LOG_NOTICE, "Got DHCPv4 request");
 
@@ -295,10 +270,15 @@ static void handle_dhcpv4(void *addr, void *data, size_t len,
 		return;
 	}
 
-	uint32_t network = iface->dhcpv4_addr.s_addr & iface->dhcpv4_mask.s_addr;
+	memcpy(&ifaddr, &ifreq.ifr_addr, sizeof(ifaddr));
+	if (ioctl(sock, SIOCGIFNETMASK, &ifreq))
+		return;
+
+	memcpy(&ifnetmask, &ifreq.ifr_netmask, sizeof(ifnetmask));
+	uint32_t network = ifaddr.sin_addr.s_addr & ifnetmask.sin_addr.s_addr;
 
-	if ((iface->dhcpv4_start.s_addr & iface->dhcpv4_mask.s_addr) != network ||
-			(iface->dhcpv4_end.s_addr & iface->dhcpv4_mask.s_addr) != network) {
+	if ((iface->dhcpv4_start.s_addr & ifnetmask.sin_addr.s_addr) != network ||
+			(iface->dhcpv4_end.s_addr & ifnetmask.sin_addr.s_addr) != network) {
 		syslog(LOG_WARNING, "DHCPv4 range out of assigned network");
 		return;
 	}
@@ -316,7 +296,7 @@ static void handle_dhcpv4(void *addr, void *data, size_t len,
 		.flags = req->flags,
 		.ciaddr = {INADDR_ANY},
 		.giaddr = req->giaddr,
-		.siaddr = iface->dhcpv4_addr,
+		.siaddr = ifaddr.sin_addr,
 	};
 	memcpy(reply.chaddr, req->chaddr, sizeof(reply.chaddr));
 
@@ -345,7 +325,7 @@ static void handle_dhcpv4(void *addr, void *data, size_t len,
 		} else if (opt->type == DHCPV4_OPT_IPADDRESS && opt->len == 4) {
 			memcpy(&reqaddr, opt->data, 4);
 		} else if (opt->type == DHCPV4_OPT_SERVERID && opt->len == 4) {
-			if (memcmp(opt->data, &iface->dhcpv4_addr, 4))
+			if (memcmp(opt->data, &ifaddr.sin_addr, 4))
 				return;
 		} else if (iface->filter_class && opt->type == DHCPV4_OPT_USER_CLASS) {
 			uint8_t *c = opt->data, *cend = &opt->data[opt->len];
@@ -397,7 +377,7 @@ static void handle_dhcpv4(void *addr, void *data, size_t len,
 		return;
 
 	dhcpv4_put(&reply, &cookie, DHCPV4_OPT_MESSAGE, 1, &msg);
-	dhcpv4_put(&reply, &cookie, DHCPV4_OPT_SERVERID, 4, &iface->dhcpv4_addr);
+	dhcpv4_put(&reply, &cookie, DHCPV4_OPT_SERVERID, 4, &ifaddr.sin_addr);
 
 	if (lease) {
 		reply.yiaddr.s_addr = htonl(lease->addr);
@@ -411,7 +391,7 @@ static void handle_dhcpv4(void *addr, void *data, size_t len,
 		val = htonl(875 * iface->dhcpv4_leasetime / 1000);
 		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_REBIND, 4, &val);
 
-		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_NETMASK, 4, &iface->dhcpv4_mask);
+		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_NETMASK, 4, &ifnetmask.sin_addr);
 
 		if (lease->hostname[0])
 			dhcpv4_put(&reply, &cookie, DHCPV4_OPT_HOSTNAME,
@@ -441,14 +421,14 @@ static void handle_dhcpv4(void *addr, void *data, size_t len,
 	}
 
 	if (iface->dhcpv4_router_cnt == 0)
-		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_ROUTER, 4, &iface->dhcpv4_addr);
+		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_ROUTER, 4, &ifaddr.sin_addr);
 	else
 		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_ROUTER,
 				4 * iface->dhcpv4_router_cnt, iface->dhcpv4_router);
 
 
 	if (iface->dhcpv4_dns_cnt == 0)
-		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_DNSSERVER, 4, &iface->dhcpv4_addr);
+		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_DNSSERVER, 4, &ifaddr.sin_addr);
 	else
 		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_DNSSERVER,
 				4 * iface->dhcpv4_dns_cnt, iface->dhcpv4_dns);