From 82914c53f777c3d69bb593a0108c6326f61a6d86 Mon Sep 17 00:00:00 2001
From: Matvey <mathway.home@gmail.com>
Date: Thu, 5 Jan 2023 03:34:23 +0300
Subject: [PATCH] added leaked_ip function - ip as seen by internet

---
 components/ip.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++--
 config.def.h    |  1 +
 slstatus.h      |  1 +
 3 files changed, 80 insertions(+), 2 deletions(-)

diff --git a/components/ip.c b/components/ip.c
index 9476549..bed3003 100644
--- a/components/ip.c
+++ b/components/ip.c
@@ -1,4 +1,6 @@
 /* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <unistd.h>
 #include <ifaddrs.h>
 #include <netdb.h>
 #include <stdio.h>
@@ -27,9 +29,9 @@ ip(const char *interface, unsigned short sa_family)
 	}
 
 	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
-		if (!ifa->ifa_addr)
+		if (!ifa->ifa_addr) {
 			continue;
-
+		}
 		s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6),
 		                host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
 		if (!strcmp(ifa->ifa_name, interface) &&
@@ -59,3 +61,77 @@ ipv6(const char *interface)
 {
 	return ip(interface, AF_INET6);
 }
+
+const char *
+leaked_ip(void)
+{
+	static const char *check_domain = "ip-api.com";
+	static const char *check_request =
+		"GET /line/?fields=query,country HTTP/1.1\r\n"
+		"Host: ip-api.com\r\n\r\n";
+	static const char *bad_addr = "X.X.X.X(Unavailable)";
+	
+	struct addrinfo *ai;
+	int remote_fd;
+	char *p;
+	int s, n;
+	int gai_errno;
+
+	if ((gai_errno = getaddrinfo(check_domain, "http", NULL, &ai)))
+	{
+		warn("Can't resolve domain %s: %s", check_domain, gai_strerror(gai_errno));
+		return bad_addr;
+	}
+	if ((remote_fd = socket(ai->ai_family, ai->ai_socktype, 0)) == -1)
+	{
+		freeaddrinfo(ai);
+		warn("socket:");
+		return bad_addr;
+	}
+	
+	if (connect(remote_fd, ai->ai_addr, ai->ai_addrlen) == -1)
+	{
+		freeaddrinfo(ai);
+		close(remote_fd);
+		warn("connect:", check_domain);
+		return bad_addr;
+	}
+	freeaddrinfo(ai);
+
+	// send request
+	n = strlen(check_request);
+	p = (char *) check_request;
+	while (n)
+	{
+		s = write(remote_fd, p, n);
+
+		if (s == -1)
+		{
+			if (errno == EINTR)
+				continue;
+			close(remote_fd);
+			warn("write:");
+			return bad_addr;
+		}
+		n -= s;
+		p += s;
+	}
+	
+	p = buf;
+	n = sizeof(buf);
+	s = read(remote_fd, p, n);
+	close(remote_fd);
+	p = strstr(buf, "\r\n\r\n");
+	if (!p)
+	{
+		warn("Can't resolve %s: Bad response from server", check_domain);
+		return bad_addr;
+	}
+	p += 4;
+	sscanf(p, "%*s%s", buf);
+	strcat(buf, "(");
+	sscanf(p, "%s", buf+strlen(buf));
+	strcat(buf, ")");
+	
+	return buf;
+}
diff --git a/config.def.h b/config.def.h
index d805331..75c282b 100644
--- a/config.def.h
+++ b/config.def.h
@@ -31,6 +31,7 @@ static const char unknown_str[] = "n/a";
  * hostname            hostname                        NULL
  * ipv4                IPv4 address                    interface name (eth0)
  * ipv6                IPv6 address                    interface name (eth0)
+ * leaked_ip           IP address leaked to Internet   NULL
  * kernel_release      `uname -r`                      NULL
  * keyboard_indicators caps/num lock indicators        format string (c?n?)
  *                                                     see keyboard_indicators.c
diff --git a/slstatus.h b/slstatus.h
index 8ef5874..6f67ccd 100644
--- a/slstatus.h
+++ b/slstatus.h
@@ -30,6 +30,7 @@ const char *hostname(const char *unused);
 /* ip */
 const char *ipv4(const char *interface);
 const char *ipv6(const char *interface);
+const char *leaked_ip(void);
 
 /* kernel_release */
 const char *kernel_release(const char *unused);
-- 
2.35.1