Switch completely to SDL2 version

The now legacy version of LimoX with GTK4 and libstrophe is now not part
of the main branch anymore. There might be a legacy branch keeping this
version at the time of reading.

This cut of implemented functionality is motivated by these reasons:
- Implementing XMPP is fun, educative and gives full control.
- Low level graphics with SDL2 is portable, fast, educative an mature.
- I do not have to use GLib and a crazy event loop anymore (run and hide)

1 files changed, 41 insertions, 7 deletions

diff --git a/xmpp.c b/xmpp.c
index 865b235..e1ab985 100644
--- a/xmpp.c
+++ b/xmpp.c
@@ -30,14 +30,51 @@ char *domainpart(char *jid)
 		}
 	}
 
-	char* retval = (char *)malloc((stop-start+1) * sizeof(char));
-	memcpy(retval, jid+start, (stop-start)*sizeof(char));
+	char *retval = (char *)malloc((stop-start+1) * sizeof(char));
+	memcpy(retval, jid+start, (stop-start) * sizeof(char));
 	retval[stop] = '\0';
 
 	return retval;
 }
 
-void net_init(void)
+/*
+ * Return the preferred struct addrinfo * or NULL
+ *
+ * This handles DNS resolution. It returns the first valid addrinfo which is
+ * returned by getaddrinfo. Mind that the addrinfo could use IPv6 instead of
+ * IPv4.
+ */
+struct addrinfo *get_addrinfo(char *domain)
+{
+	struct addrinfo hints;
+	struct addrinfo *servinfo;
+	memset(&hints, 0, sizeof hints);
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	if (getaddrinfo(domain, "xmpp-client", &hints, &servinfo) != 0) {
+		printf("Failed to resolve hostname '%s'.\n", domain);
+		return NULL;
+	}
+	struct addrinfo *p;
+	for(p=servinfo; p!=NULL; p=p->ai_next) {
+		if (p->ai_family == AF_INET) {
+			printf("an IPv4!\n");  // TODO
+
+		} else if (p->ai_family == AF_INET6) {
+			printf("an IPv6!\n");  // TODO
+		} else {
+			printf("Unknown addrinfo address type.\n");
+		}
+	}
+	return NULL;
+}
+
+/*
+ * Initialize the network connection to the XMPP server
+ *
+ * TODO: Error handling is missing.
+ */
+void xmpp_connect(void)
 {
 	printf("net_init()\n");
 
@@ -46,9 +83,6 @@ void net_init(void)
 	char *domain = domainpart(user_str);
 	printf("Trying to connect as '%s' with '%s'.\n", user_str, pwd_str);
 	printf("Domainpart is '%s'.\n", domain);
-}
 
-void net_quit(void)
-{
-	printf("net_quit()\n");
+	get_addrinfo(domain);
 }