1 files changed, 63 insertions, 0 deletions
diff --git a/src/rexmpp_socks.h b/src/rexmpp_socks.h
new file mode 100644
index 0000000..213a92d
--- /dev/null
+++ b/src/rexmpp_socks.h
@@ -0,0 +1,63 @@
+/**
+   @file rexmpp_socks.h
+   @brief SOCKS5 connection establishment.
+   @author defanor <defanor@uberspace.net>
+   @date 2020
+   @copyright MIT license.
+*/
+
+#ifndef REXMPP_SOCKS_H
+#define REXMPP_SOCKS_H
+
+#include <unistd.h>
+
+
+#define REXMPP_SOCKS_BUF_LEN 300
+
+
+enum socks_io_state {
+  REXMPP_SOCKS_WRITING,
+  REXMPP_SOCKS_READING
+};
+
+enum socks_stage {
+  REXMPP_SOCKS_AUTH,
+  REXMPP_SOCKS_CMD,
+  REXMPP_SOCKS_DONE
+};
+
+enum socks_err {
+  REXMPP_SOCKS_CONNECTED,
+  REXMPP_SOCKS_E_AGAIN,
+  REXMPP_SOCKS_E_TCP,
+  REXMPP_SOCKS_E_REPLY,
+  REXMPP_SOCKS_E_VERSION,
+  REXMPP_SOCKS_E_SOCKS,
+  REXMPP_SOCKS_E_HOST
+};
+
+struct rexmpp_socks {
+  int fd;
+  const char *host;
+  uint16_t port;
+  enum socks_stage stage;
+  enum socks_io_state io_state;
+  int socks_error;
+  char buf[REXMPP_SOCKS_BUF_LEN];
+  size_t buf_len;
+  size_t buf_sent;
+};
+typedef struct rexmpp_socks rexmpp_socks_t;
+
+
+enum socks_err
+rexmpp_socks_proceed (rexmpp_socks_t *s);
+
+enum socks_err
+rexmpp_socks_init (rexmpp_socks_t *s,
+                   int fd,
+                   const char *host,
+                   uint16_t port);
+
+
+#endif