net: cosmetic: Clean up DNS variables and functions

Make a thorough pass through all variables and function names contained
within dns.c and remove CamelCase and improve naming.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>

common/cmd_net.c

@@ -393,12 +393,12 @@ int do_dns(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		return CMD_RET_FAILURE;
 	}
 
-	NetDNSResolve = argv[1];
+	net_dns_resolve = argv[1];
 
 	if (argc == 3)
-		NetDNSenvvar = argv[2];
+		net_dns_env_var = argv[2];
 	else
-		NetDNSenvvar = NULL;
+		net_dns_env_var = NULL;
 
 	if (NetLoop(DNS) < 0) {
 		printf("dns lookup of %s failed, check setup\n", argv[1]);

include/net.h

@@ -508,8 +508,8 @@ extern u32	net_boot_file_size;
 extern u32	net_boot_file_expected_size_in_blocks;
 
 #if defined(CONFIG_CMD_DNS)
-extern char *NetDNSResolve;		/* The host to resolve  */
-extern char *NetDNSenvvar;		/* the env var to put the ip into */
+extern char *net_dns_resolve;		/* The host to resolve  */
+extern char *net_dns_env_var;		/* the env var to put the ip into */
 #endif
 
 #if defined(CONFIG_CMD_PING)

net/dns.c

@@ -29,13 +29,12 @@
 
 #include "dns.h"
 
-char *NetDNSResolve;	/* The host to resolve  */
-char *NetDNSenvvar;	/* The envvar to store the answer in */
+char *net_dns_resolve;	/* The host to resolve  */
+char *net_dns_env_var;	/* The envvar to store the answer in */
 
-static int DnsOurPort;
+static int dns_our_port;
 
-static void
-DnsSend(void)
+static void dns_send(void)
 {
 	struct header *header;
 	int n, name_len;
@@ -44,12 +43,12 @@ DnsSend(void)
 	const char *name;
 	enum dns_query_type qtype = DNS_A_RECORD;
 
-	name = NetDNSResolve;
+	name = net_dns_resolve;
 	pkt = (uchar *)(net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE);
 	p = pkt;
 
 	/* Prepare DNS packet header */
-	header           = (struct header *) pkt;
+	header           = (struct header *)pkt;
 	header->tid      = 1;
 	header->flags    = htons(0x100);	/* standard query */
 	header->nqueries = htons(1);		/* Just one query */
@@ -59,7 +58,7 @@ DnsSend(void)
 
 	/* Encode DNS name */
 	name_len = strlen(name);
-	p = (uchar *) &header->data;	/* For encoding host name into packet */
+	p = (uchar *)&header->data;	/* For encoding host name into packet */
 
 	do {
 		s = strchr(name, '.');
@@ -88,15 +87,14 @@ DnsSend(void)
 	n = p - pkt;				/* Total packet length */
 	debug("Packet size %d\n", n);
 
-	DnsOurPort = random_port();
+	dns_our_port = random_port();
 
 	net_send_udp_packet(net_server_ethaddr, net_dns_server,
-			    DNS_SERVICE_PORT, DnsOurPort, n);
+			    DNS_SERVICE_PORT, dns_our_port, n);
 	debug("DNS packet sent\n");
 }
 
-static void
-DnsTimeout(void)
+static void dns_timeout_handler(void)
 {
 	puts("Timeout\n");
 	net_set_state(NETLOOP_FAIL);
@@ -109,20 +107,20 @@ static void dns_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 	const unsigned char *p, *e, *s;
 	u16 type, i;
 	int found, stop, dlen;
-	char IPStr[22];
+	char ip_str[22];
 	struct in_addr ip_addr;
 
 
 	debug("%s\n", __func__);
-	if (dest != DnsOurPort)
+	if (dest != dns_our_port)
 		return;
 
 	for (i = 0; i < len; i += 4)
 		debug("0x%p - 0x%.2x  0x%.2x  0x%.2x  0x%.2x\n",
-			pkt+i, pkt[i], pkt[i+1], pkt[i+2], pkt[i+3]);
+		      pkt+i, pkt[i], pkt[i+1], pkt[i+2], pkt[i+3]);
 
 	/* We sent one query. We want to have a single answer: */
-	header = (struct header *) pkt;
+	header = (struct header *)pkt;
 	if (ntohs(header->nqueries) != 1)
 		return;
 
@@ -151,7 +149,6 @@ static void dns_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 
 	/* Loop through the answers, we want A type answer */
 	for (found = stop = 0; !stop && &p[12] < e; ) {
-
 		/* Skip possible name in CNAME answer */
 		if (*p != 0xc0) {
 			while (*p && &p[12] < e)
@@ -170,7 +167,8 @@ static void dns_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 			p += 12 + dlen;
 		} else if (type == DNS_A_RECORD) {
 			debug("Found A-record\n");
-			found = stop = 1;
+			found = 1;
+			stop = 1;
 		} else {
 			debug("Unknown type\n");
 			stop = 1;
@@ -178,33 +176,32 @@ static void dns_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 	}
 
 	if (found && &p[12] < e) {
-
 		dlen = get_unaligned_be16(p+10);
 		p += 12;
 		memcpy(&ip_addr, p, 4);
 
 		if (p + dlen <= e) {
-			ip_to_string(ip_addr, IPStr);
-			printf("%s\n", IPStr);
-			if (NetDNSenvvar)
-				setenv(NetDNSenvvar, IPStr);
-		} else
+			ip_to_string(ip_addr, ip_str);
+			printf("%s\n", ip_str);
+			if (net_dns_env_var)
+				setenv(net_dns_env_var, ip_str);
+		} else {
 			puts("server responded with invalid IP number\n");
+		}
 	}
 
 	net_set_state(NETLOOP_SUCCESS);
 }
 
-void
-DnsStart(void)
+void dns_start(void)
 {
 	debug("%s\n", __func__);
 
-	NetSetTimeout(DNS_TIMEOUT, DnsTimeout);
+	NetSetTimeout(DNS_TIMEOUT, dns_timeout_handler);
 	net_set_udp_handler(dns_handler);
 
 	/* Clear a previous MAC address, the server IP might have changed. */
 	memset(net_server_ethaddr, 0, sizeof(net_server_ethaddr));
 
-	DnsSend();
+	dns_send();
 }

net/dns.h

@@ -31,6 +31,6 @@ struct header {
 	unsigned char	data[1];	/* Data, variable length */
 };
 
-extern void DnsStart(void);		/* Begin DNS */
+void dns_start(void);		/* Begin DNS */
 
 #endif

net/net.c

@@ -427,7 +427,7 @@ restart:
 #endif
 #if defined(CONFIG_CMD_DNS)
 		case DNS:
-			DnsStart();
+			dns_start();
 			break;
 #endif
 #if defined(CONFIG_CMD_LINK_LOCAL)