Merge pull request #539 from majbthrd/nettweaks

net_lwip_webserver: efficiency tweaks

examples/device/net_lwip_webserver/src/lwipopts.h

@@ -35,7 +35,7 @@
 /* Prevent having to link sys_arch.c (we don't test the API layers in unit tests) */
 #define NO_SYS                          1
 #define MEM_ALIGNMENT                   4
-#define LWIP_RAW                        1
+#define LWIP_RAW                        0
 #define LWIP_NETCONN                    0
 #define LWIP_SOCKET                     0
 #define LWIP_DHCP                       0
@@ -54,4 +54,6 @@
 #define LWIP_HTTPD_SSI                  0
 #define LWIP_HTTPD_SSI_INCLUDE_TAG      0
 
+#define LWIP_SINGLE_NETIF               1
+
 #endif /* __LWIPOPTS_H__ */

examples/device/net_lwip_webserver/src/main.c

@@ -71,22 +71,21 @@ static const ip_addr_t gateway = IPADDR4_INIT_BYTES(0, 0, 0, 0);
 /* database IP addresses that can be offered to the host; this must be in RAM to store assigned MAC addresses */
 static dhcp_entry_t entries[] =
 {
-  /* mac    ip address        subnet mask        lease time */
-  { {0}, {192, 168, 7, 2}, {255, 255, 255, 0}, 24 * 60 * 60 },
-  { {0}, {192, 168, 7, 3}, {255, 255, 255, 0}, 24 * 60 * 60 },
-  { {0}, {192, 168, 7, 4}, {255, 255, 255, 0}, 24 * 60 * 60 }
+    /* mac ip address                          lease time */
+    { {0}, IPADDR4_INIT_BYTES(192, 168, 7, 2), 24 * 60 * 60 },
+    { {0}, IPADDR4_INIT_BYTES(192, 168, 7, 3), 24 * 60 * 60 },
+    { {0}, IPADDR4_INIT_BYTES(192, 168, 7, 4), 24 * 60 * 60 },
 };
 
-/* DHCP configuration parameters, leveraging "entries" above */
 static const dhcp_config_t dhcp_config =
 {
-  {192, 168, 7, 1}, 67,    /* server address (self), port */
-  {192, 168, 7, 1},        /* dns server (self) */
-  "usb",                   /* dns suffix */
-  TU_ARRAY_SIZE(entries),  /* number of entries */
-  entries                  /* pointer to entries */
+    .router = IPADDR4_INIT_BYTES(0, 0, 0, 0),  /* router address (if any) */
+    .port = 67,                                /* listen port */
+    .dns = IPADDR4_INIT_BYTES(192, 168, 7, 1), /* dns server (if any) */
+    "usb",                                     /* dns suffix */
+    TU_ARRAY_SIZE(entries),                    /* num entry */
+    entries                                    /* entries */
 };
-
 static err_t linkoutput_fn(struct netif *netif, struct pbuf *p)
 {
   (void)netif;

lib/networking/dhserver.c

@@ -96,23 +96,23 @@ static const dhcp_config_t *config = NULL;
 
 char magic_cookie[] = {0x63,0x82,0x53,0x63};
 
-static uint32_t get_ip(const uint8_t *pnt)
+static ip_addr_t get_ip(const uint8_t *pnt)
 {
-  uint32_t result;
+  ip_addr_t result;
   memcpy(&result, pnt, sizeof(result));
   return result;
 }
 
-static void set_ip(uint8_t *pnt, uint32_t value)
+static void set_ip(uint8_t *pnt, ip_addr_t value)
 {
-  memcpy(pnt, &value, sizeof(value));
+  memcpy(pnt, &value.addr, sizeof(value.addr));
 }
 
-static dhcp_entry_t *entry_by_ip(uint32_t ip)
+static dhcp_entry_t *entry_by_ip(ip_addr_t ip)
 {
 	int i;
 	for (i = 0; i < config->num_entry; i++)
-		if (get_ip(config->entries[i].addr) == ip)
+		if (config->entries[i].addr.addr == ip.addr)
 			return &config->entries[i];
 	return NULL;
 }
@@ -162,11 +162,11 @@ uint8_t *find_dhcp_option(uint8_t *attrs, int size, uint8_t attr)
 int fill_options(void *dest,
 	uint8_t msg_type,
 	const char *domain,
-	uint32_t dns,
+	ip_addr_t dns,
 	int lease_time,
-	uint32_t serverid,
-	uint32_t router,
-	uint32_t subnet)
+	ip_addr_t serverid,
+	ip_addr_t router,
+	ip_addr_t subnet)
 {
 	uint8_t *ptr = (uint8_t *)dest;
 	/* ACK message type */
@@ -195,7 +195,7 @@ int fill_options(void *dest,
 	ptr += 4;
 
 	/* router */
-	if (router != 0)
+	if (router.addr != 0)
 	{
 		*ptr++ = DHCP_ROUTER;
 		*ptr++ = 4;
@@ -214,7 +214,7 @@ int fill_options(void *dest,
 	}
 
 	/* domain name server (DNS) */
-	if (dns != 0)
+	if (dns.addr != 0)
 	{
 		*ptr++ = DHCP_DNSSERVER;
 		*ptr++ = 4;
@@ -232,6 +232,7 @@ static void udp_recv_proc(void *arg, struct udp_pcb *upcb, struct pbuf *p, const
 	uint8_t *ptr;
 	dhcp_entry_t *entry;
 	struct pbuf *pp;
+	struct netif *netif = netif_get_by_index(p->if_idx);
 
 	(void)arg;
 	(void)addr;
@@ -249,7 +250,7 @@ static void udp_recv_proc(void *arg, struct udp_pcb *upcb, struct pbuf *p, const
 			dhcp_data.dp_op = 2; /* reply */
 			dhcp_data.dp_secs = 0;
 			dhcp_data.dp_flags = 0;
-			set_ip(dhcp_data.dp_yiaddr, get_ip(entry->addr));
+			set_ip(dhcp_data.dp_yiaddr, entry->addr);
 			memcpy(dhcp_data.dp_magic, magic_cookie, 4);
 
 			memset(dhcp_data.dp_options, 0, sizeof(dhcp_data.dp_options));
@@ -257,11 +258,11 @@ static void udp_recv_proc(void *arg, struct udp_pcb *upcb, struct pbuf *p, const
 			fill_options(dhcp_data.dp_options,
 				DHCP_OFFER,
 				config->domain,
-				get_ip(config->dns),
+				config->dns,
 				entry->lease, 
-				get_ip(config->addr),
-				get_ip(config->addr), 
-				get_ip(entry->subnet));
+				*netif_ip4_addr(netif),
+				config->router,
+				*netif_ip4_netmask(netif));
 
 			pp = pbuf_alloc(PBUF_TRANSPORT, sizeof(dhcp_data), PBUF_POOL);
 			if (pp == NULL) break;
@@ -299,11 +300,11 @@ static void udp_recv_proc(void *arg, struct udp_pcb *upcb, struct pbuf *p, const
 			fill_options(dhcp_data.dp_options,
 				DHCP_ACK,
 				config->domain,
-				get_ip(config->dns),
+				config->dns,
 				entry->lease, 
-				get_ip(config->addr),
-				get_ip(config->addr), 
-				get_ip(entry->subnet));
+				*netif_ip4_addr(netif),
+				config->router,
+				*netif_ip4_netmask(netif));
 
 			/* 6. send ACK */
 			pp = pbuf_alloc(PBUF_TRANSPORT, sizeof(dhcp_data), PBUF_POOL);

lib/networking/dhserver.h

@@ -42,16 +42,15 @@
 typedef struct dhcp_entry
 {
 	uint8_t  mac[6];
-	uint8_t  addr[4];
-	uint8_t  subnet[4];
+	ip_addr_t addr;
 	uint32_t lease;
 } dhcp_entry_t;
 
 typedef struct dhcp_config
 {
-	uint8_t       addr[4];
+	ip_addr_t     router;
 	uint16_t      port;
-	uint8_t       dns[4];
+	ip_addr_t     dns;
 	const char   *domain;
 	int           num_entry;
 	dhcp_entry_t *entries;