Implement getting current speed from network interfaces

The network interface must be supported by ethtool, as its syscall is
used for this. This is at least the case for e1000 cards.

Unfortunately, getting the speed needs root privileges. Therefore, you
have to enable it in configuration separately.

1 files changed, 29 insertions, 2 deletions

diff --git a/wmiistatus.c b/wmiistatus.c
index a7f0b7a..e99625a 100644
--- a/wmiistatus.c
+++ b/wmiistatus.c
@@ -50,6 +50,9 @@
 #include <glob.h>
 #include <dirent.h>
 #include <getopt.h>
+#include <linux/ethtool.h>
+#include <linux/sockios.h>
+
 
 #define _IS_WMIISTATUS_C
 #include "wmiistatus.h"
@@ -262,7 +265,7 @@ static char *get_wireless_info() {
 			else (void)snprintf(part, sizeof(part), "W: down");
 
 			} else {
-				char *ip_address;
+				const char *ip_address;
 				(void)snprintf(part, sizeof(part), "W: (%02d%%) ", quality);
 				ip_address = get_ip_address(wlan_interface);
 				strcpy(part+strlen(part), ip_address);
@@ -311,10 +314,34 @@ static const char *get_ip_address(const char *interface) {
 static char *get_eth_info() {
 	static char part[512];
 	const char *ip_address = get_ip_address(eth_interface);
+	int ethspeed = 0;
+
+	if (get_ethspeed) {
+		struct ifreq ifr;
+		struct ethtool_cmd ecmd;
+		int fd, err;
+
+		if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+			write_error_to_statusbar("Could not open socket");
+
+		ecmd.cmd = ETHTOOL_GSET;
+		(void)memset(&ifr, 0, sizeof(ifr));
+		ifr.ifr_data = (caddr_t)&ecmd;
+		(void)strcpy(ifr.ifr_name, eth_interface);
+		if ((err = ioctl(fd, SIOCETHTOOL, &ifr)) == 0)
+			ethspeed = ecmd.speed;
+		else write_error_to_statusbar("Could not get interface speed. Insufficient privileges?");
+
+		(void)close(fd);
+	}
 
 	if (ip_address == NULL)
 		(void)snprintf(part, sizeof(part), "E: down");
-	else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
+	else {
+		if (get_ethspeed)
+			(void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
+		else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
+	}
 
 	return part;
 }