From c5c3c438c96eedacb6c6241317a56bd587a39cc8 Mon Sep 17 00:00:00 2001
From: Saverio Proto <zioproto@gmail.com>
Date: Wed, 21 May 2014 18:55:54 +0200
Subject: [PATCH] Drop old invitation.[ch]

---
 src/invitation.c | 947 -----------------------------------------------
 src/invitation.h |  27 --
 2 files changed, 974 deletions(-)
 delete mode 100644 src/invitation.c
 delete mode 100644 src/invitation.h

diff --git a/src/invitation.c b/src/invitation.c
deleted file mode 100644
index 1fba77e1..00000000
--- a/src/invitation.c
+++ /dev/null
@@ -1,947 +0,0 @@
-/*
-    invitation.c -- Create and accept invitations
-    Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
-
-#include "system.h"
-
-#include "control_common.h"
-#include "crypto.h"
-#include "ecdsa.h"
-#include "ecdsagen.h"
-#include "invitation.h"
-#include "netutl.h"
-#include "sptps.h"
-#include "tincctl.h"
-#include "utils.h"
-#include "xalloc.h"
-
-int addressfamily = AF_UNSPEC;
-
-static void scan_for_hostname(const char *filename, char **hostname, char **port) {
-	if(!filename || (*hostname && *port))
-		return;
-
-	FILE *f = fopen(filename, "r");
-	if(!f)
-		return;
-
-	while(fgets(line, sizeof line, f)) {
-		if(!rstrip(line))
-			continue;
-		char *p = line, *q;
-		p += strcspn(p, "\t =");
-		if(!*p)
-			continue;
-		q = p + strspn(p, "\t ");
-		if(*q == '=')
-			q += 1 + strspn(q + 1, "\t ");
-		*p = 0;
-		p = q + strcspn(q, "\t ");
-		if(*p)
-			*p++ = 0;
-		p += strspn(p, "\t ");
-		p[strcspn(p, "\t ")] = 0;
-
-		if(!*port && !strcasecmp(line, "Port")) {
-			*port = xstrdup(q);
-		} else if(!*hostname && !strcasecmp(line, "Address")) {
-			*hostname = xstrdup(q);
-			if(*p) {
-				free(*port);
-				*port = xstrdup(p);
-			}
-		}
-
-		if(*hostname && *port)
-			break;
-	}
-
-	fclose(f);
-}
-
-char *get_my_hostname() {
-	char *hostname = NULL;
-	char *port = NULL;
-	char *hostport = NULL;
-	char *name = get_my_name(false);
-	char filename[PATH_MAX];
-
-	// Use first Address statement in own host config file
-	if(check_id(name)) {
-		snprintf(filename,PATH_MAX, "%s" SLASH "hosts" SLASH "%s", confbase, name);
-		scan_for_hostname(filename, &hostname, &port);
-		scan_for_hostname(tinc_conf, &hostname, &port);
-	}
-
-	if(hostname)
-		goto done;
-
-	// If that doesn't work, guess externally visible hostname
-	fprintf(stderr, "Trying to discover externally visible hostname...\n");
-	struct addrinfo *ai = str2addrinfo("tinc-vpn.org", "80", SOCK_STREAM);
-	struct addrinfo *aip = ai;
-	static const char request[] = "GET http://tinc-vpn.org/host.cgi HTTP/1.0\r\n\r\n";
-
-	while(aip) {
-		int s = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
-		if(s >= 0) {
-			if(connect(s, aip->ai_addr, aip->ai_addrlen)) {
-				closesocket(s);
-				s = -1;
-			}
-		}
-		if(s >= 0) {
-			send(s, request, sizeof request - 1, 0);
-			int len = recv(s, line, sizeof line - 1, MSG_WAITALL);
-			if(len > 0) {
-				line[len] = 0;
-				if(line[len - 1] == '\n')
-					line[--len] = 0;
-				char *p = strrchr(line, '\n');
-				if(p && p[1])
-					hostname = xstrdup(p + 1);
-			}
-			closesocket(s);
-			if(hostname)
-				break;
-		}
-		aip = aip->ai_next;
-		continue;
-	}
-
-	if(ai)
-		freeaddrinfo(ai);
-
-	// Check that the hostname is reasonable
-	if(hostname) {
-		for(char *p = hostname; *p; p++) {
-			if(isalnum(*p) || *p == '-' || *p == '.' || *p == ':')
-				continue;
-			// If not, forget it.
-			free(hostname);
-			hostname = NULL;
-			break;
-		}
-	}
-
-	if(!tty) {
-		if(!hostname) {
-			fprintf(stderr, "Could not determine the external address or hostname. Please set Address manually.\n");
-			return NULL;
-		}
-		goto save;
-	}
-
-again:
-	fprintf(stderr, "Please enter your host's external address or hostname");
-	if(hostname)
-		fprintf(stderr, " [%s]", hostname);
-	fprintf(stderr, ": ");
-
-	if(!fgets(line, sizeof line, stdin)) {
-		fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
-		free(hostname);
-		return NULL;
-	}
-
-	if(!rstrip(line)) {
-		if(hostname)
-			goto save;
-		else
-			goto again;
-	}
-
-	for(char *p = line; *p; p++) {
-		if(isalnum(*p) || *p == '-' || *p == '.')
-			continue;
-		fprintf(stderr, "Invalid address or hostname.\n");
-		goto again;
-	}
-
-	free(hostname);
-	hostname = xstrdup(line);
-
-save:
-	if(filename) {
-		FILE *f = fopen(filename, "a");
-		if(f) {
-			fprintf(f, "\nAddress = %s\n", hostname);
-			fclose(f);
-		} else {
-			fprintf(stderr, "Could not append Address to %s: %s\n", filename, strerror(errno));
-		}
-	}
-
-done:
-	if(port) {
-		if(strchr(hostname, ':'))
-			xasprintf(&hostport, "[%s]:%s", hostname, port);
-		else
-			xasprintf(&hostport, "%s:%s", hostname, port);
-	} else {
-		if(strchr(hostname, ':'))
-			xasprintf(&hostport, "[%s]", hostname);
-		else
-			hostport = xstrdup(hostname);
-	}
-
-	free(hostname);
-	free(port);
-	return hostport;
-}
-
-static bool fcopy(FILE *out, const char *filename) {
-	FILE *in = fopen(filename, "r");
-	if(!in) {
-		fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
-		return false;
-	}
-
-	char buf[1024];
-	size_t len;
-	while((len = fread(buf, 1, sizeof buf, in)))
-		fwrite(buf, len, 1, out);
-	fclose(in);
-	return true;
-}
-
-int cmd_invite(int argc, char *argv[]) {
-	if(argc < 2) {
-		fprintf(stderr, "Not enough arguments!\n");
-		return 1;
-	}
-
-	// Check validity of the new node's name
-	if(!check_id(argv[1])) {
-		fprintf(stderr, "Invalid name for node.\n");
-		return 1;
-	}
-
-	char *myname = get_my_name(true);
-	if(!myname)
-		return 1;
-
-	// Ensure no host configuration file with that name exists
-	char filename [PATH_MAX];
-	snprintf(filename,PATH_MAX, "%s" SLASH "hosts" SLASH "%s", confbase, argv[1]);
-	if(!access(filename, F_OK)) {
-		fprintf(stderr, "A host config file for %s already exists!\n", argv[1]);
-		return 1;
-	}
-
-	// If a daemon is running, ensure no other nodes now about this name
-	bool found = false;
-	if(connect_tincd(false)) {
-		sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
-
-		while(recvline(fd, line, sizeof line)) {
-			char node[4096];
-			int code, req;
-			if(sscanf(line, "%d %d %s", &code, &req, node) != 3)
-				break;
-			if(!strcmp(node, argv[1]))
-				found = true;
-		}
-
-		if(found) {
-			fprintf(stderr, "A node with name %s is already known!\n", argv[1]);
-			return 1;
-		}
-	}
-
-	char hash[64];
-
-	snprintf(filename,PATH_MAX, "%s" SLASH "invitations", confbase);
-	if(mkdir(filename, 0700) && errno != EEXIST) {
-		fprintf(stderr, "Could not create directory %s: %s\n", filename, strerror(errno));
-		return 1;
-	}
-
-	// Count the number of valid invitations, clean up old ones
-	DIR *dir = opendir(filename);
-	if(!dir) {
-		fprintf(stderr, "Could not read directory %s: %s\n", filename, strerror(errno));
-		return 1;
-	}
-
-	errno = 0;
-	int count = 0;
-	struct dirent *ent;
-	time_t deadline = time(NULL) - 604800; // 1 week in the past
-
-	while((ent = readdir(dir))) {
-		if(strlen(ent->d_name) != 24)
-			continue;
-		char invname[PATH_MAX];
-		struct stat st;
-		snprintf(invname,PATH_MAX, "%s" SLASH "%s", filename, ent->d_name);
-		if(!stat(invname, &st)) {
-			if(deadline < st.st_mtime)
-				count++;
-			else
-				unlink(invname);
-		} else {
-			fprintf(stderr, "Could not stat %s: %s\n", invname, strerror(errno));
-			errno = 0;
-		}
-	}
-
-	if(errno) {
-		fprintf(stderr, "Error while reading directory %s: %s\n", filename, strerror(errno));
-		closedir(dir);
-		return 1;
-	}
-		
-	closedir(dir);
-
-	ecdsa_t *key;
-	snprintf(filename,PATH_MAX, "%s" SLASH "invitations" SLASH "ecdsa_key.priv", confbase);
-
-	// Remove the key if there are no outstanding invitations.
-	if(!count)
-		unlink(filename);
-
-	// Create a new key if necessary.
-	FILE *f = fopen(filename, "r");
-	if(!f) {
-		if(errno != ENOENT) {
-			fprintf(stderr, "Could not read %s: %s\n", filename, strerror(errno));
-			return 1;
-		}
-
-		key = ecdsa_generate();
-		if(!key) {
-			return 1;
-		}
-		f = fopen(filename, "w");
-		if(!f) {
-			fprintf(stderr, "Could not write %s: %s\n", filename, strerror(errno));
-			return 1;
-		}
-		chmod(filename, 0600);
-		ecdsa_write_pem_private_key(key, f);
-		fclose(f);
-
-		if(connect_tincd(false))
-			sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
-	} else {
-		key = ecdsa_read_pem_private_key(f);
-		fclose(f);
-		if(!key)
-			fprintf(stderr, "Could not read private key from %s\n", filename);
-	}
-
-	if(!key)
-		return 1;
-
-	// Create a hash of the key.
-	char *fingerprint = ecdsa_get_base64_public_key(key);
-	sha512(fingerprint, strlen(fingerprint), hash);
-	b64encode_urlsafe(hash, hash, 18);
-
-	// Create a random cookie for this invitation.
-	char cookie[25];
-	randomize(cookie, 18);
-
-	// Create a filename that doesn't reveal the cookie itself
-	char buf[18 + strlen(fingerprint)];
-	char cookiehash[64];
-	memcpy(buf, cookie, 18);
-	memcpy(buf + 18, fingerprint, sizeof buf - 18);
-	sha512(buf, sizeof buf, cookiehash);
-	b64encode_urlsafe(cookiehash, cookiehash, 18);
-
-	b64encode_urlsafe(cookie, cookie, 18);
-
-	// Create a file containing the details of the invitation.
-	snprintf(filename,PATH_MAX, "%s" SLASH "invitations" SLASH "%s", confbase, cookiehash);
-	int ifd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
-	if(!ifd) {
-		fprintf(stderr, "Could not create invitation file %s: %s\n", filename, strerror(errno));
-		return 1;
-	}
-	f = fdopen(ifd, "w");
-	if(!f)
-		abort();
-
-	// Get the local address
-	char *address = get_my_hostname();
-
-	// Fill in the details.
-	fprintf(f, "Name = %s\n", argv[1]);
-	if(netname)
-		fprintf(f, "NetName = %s\n", netname);
-	fprintf(f, "ConnectTo = %s\n", myname);
-
-	// Copy Broadcast and Mode
-	FILE *tc = fopen(tinc_conf, "r");
-	if(tc) {
-		char buf[1024];
-		while(fgets(buf, sizeof buf, tc)) {
-			if((!strncasecmp(buf, "Mode", 4) && strchr(" \t=", buf[4]))
-					|| (!strncasecmp(buf, "Broadcast", 9) && strchr(" \t=", buf[9]))) {
-				fputs(buf, f);
-				// Make sure there is a newline character.
-				if(!strchr(buf, '\n'))
-					fputc('\n', f);
-			}
-		}
-		fclose(tc);
-	}
-
-	fprintf(f, "#---------------------------------------------------------------#\n");
-	fprintf(f, "Name = %s\n", myname);
-
-	char filename2[PATH_MAX];
-	snsprintf(filename2,PATH_MAX, "%s" SLASH "hosts" SLASH "%s", confbase, myname);
-	fcopy(f, filename2);
-	fclose(f);
-
-	// Create an URL from the local address, key hash and cookie
-	char *url;
-	xasprintf(&url, "%s/%s%s", address, hash, cookie);
-
-	return 0;
-}
-
-static int sock;
-static char cookie[18];
-static sptps_t sptps;
-static char *data;
-static size_t datalen;
-static bool success = false;
-
-static char cookie[18], hash[18];
-
-static char *get_line(const char **data) {
-	if(!data || !*data)
-		return NULL;
-
-	if(!**data) {
-		*data = NULL;
-		return NULL;
-	}
-
-	static char line[1024];
-	const char *end = strchr(*data, '\n');
-	size_t len = end ? end - *data : strlen(*data);
-	if(len >= sizeof line) {
-		fprintf(stderr, "Maximum line length exceeded!\n");
-		return NULL;
-	}
-	if(len && !isprint(**data))
-		abort();
-
-	memcpy(line, *data, len);
-	line[len] = 0;
-
-	if(end)
-		*data = end + 1;
-	else
-		*data = NULL;
-
-	return line;
-}
-
-static char *get_value(const char *data, const char *var) {
-	char *line = get_line(&data);
-	if(!line)
-		return NULL;
-
-	char *sep = line + strcspn(line, " \t=");
-	char *val = sep + strspn(sep, " \t");
-	if(*val == '=')
-		val += 1 + strspn(val + 1, " \t");
-	*sep = 0;
-	if(strcasecmp(line, var))
-		return NULL;
-	return val;
-}
-
-static char *grep(const char *data, const char *var) {
-	static char value[1024];
-
-	const char *p = data;
-	int varlen = strlen(var);
-
-	// Skip all lines not starting with var
-	while(strncasecmp(p, var, varlen) || !strchr(" \t=", p[varlen])) {
-		p = strchr(p, '\n');
-		if(!p)
-			break;
-		else
-			p++;
-	}
-
-	if(!p)
-		return NULL;
-
-	p += varlen;
-	p += strspn(p, " \t");
-	if(*p == '=')
-		p += 1 + strspn(p + 1, " \t");
-
-	const char *e = strchr(p, '\n');
-	if(!e)
-		return xstrdup(p);
-
-	if(e - p >= sizeof value) {
-		fprintf(stderr, "Maximum line length exceeded!\n");
-		return NULL;
-	}
-
-	memcpy(value, p, e - p);
-	value[e - p] = 0;
-	return value;
-}
-
-static bool finalize_join(void) {
-	char *name = xstrdup(get_value(data, "Name"));
-	if(!name) {
-		fprintf(stderr, "No Name found in invitation!\n");
-		return false;
-	}
-
-	if(!check_id(name)) {
-		fprintf(stderr, "Invalid Name found in invitation: %s!\n", name);
-		return false;
-	}
-
-	if(!netname)
-		netname = grep(data, "NetName");
-
-	bool ask_netname = false;
-	char temp_netname[32];
-
-make_names:
-	free(tinc_conf);
-	free(hosts_dir);
-
-	xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
-	xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
-
-	if(!access(tinc_conf, F_OK)) {
-		fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
-		if(confbasegiven)
-			return false;
-
-		// Generate a random netname, ask for a better one later.
-		ask_netname = true;
-		snprintf(temp_netname, sizeof temp_netname, "join_%x", rand());
-		netname = temp_netname;
-		goto make_names;
-	}	
-
-	if(mkdir(confbase, 0777) && errno != EEXIST) {
-		fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
-		return false;
-	}
-
-	if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
-		fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
-		return false;
-	}
-
-	FILE *f = fopen(tinc_conf, "w");
-	if(!f) {
-		fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
-		return false;
-	}
-
-	fprintf(f, "Name = %s\n", name);
-
-	char filename[PATH_MAX];
-	snprintf(filename,PATH_MAX, "%s" SLASH "%s", hosts_dir, name);
-	FILE *fh = fopen(filename, "w");
-	if(!fh) {
-		fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
-		return false;
-	}
-
-	// Filter first chunk on approved keywords, split between tinc.conf and hosts/Name
-	// Other chunks go unfiltered to their respective host config files
-	const char *p = data;
-	char *l, *value;
-
-	while((l = get_line(&p))) {
-		// Ignore comments
-		if(*l == '#')
-			continue;
-
-		// Split line into variable and value
-		int len = strcspn(l, "\t =");
-		value = l + len;
-		value += strspn(value, "\t ");
-		if(*value == '=') {
-			value++;
-			value += strspn(value, "\t ");
-		}
-		l[len] = 0;
-
-		// Is it a Name?
-		if(!strcasecmp(l, "Name"))
-			if(strcmp(value, name))
-				break;
-			else
-				continue;
-		else if(!strcasecmp(l, "NetName"))
-			continue;
-
-		// Check the list of known variables
-		bool found = false;
-		int i;
-		for(i = 0; variables[i].name; i++) {
-			if(strcasecmp(l, variables[i].name))
-				continue;
-			found = true;
-			break;
-		}
-
-		// Ignore unknown and unsafe variables
-		if(!found) {
-			fprintf(stderr, "Ignoring unknown variable '%s' in invitation.\n", l);
-			continue;
-		} else if(!(variables[i].type & VAR_SAFE)) {
-			fprintf(stderr, "Ignoring unsafe variable '%s' in invitation.\n", l);
-			continue;
-		}
-
-		// Copy the safe variable to the right config file
-		fprintf(variables[i].type & VAR_HOST ? fh : f, "%s = %s\n", l, value);
-	}
-
-	fclose(f);
-
-	while(l && !strcasecmp(l, "Name")) {
-		if(!check_id(value)) {
-			fprintf(stderr, "Invalid Name found in invitation.\n");
-			return false;
-		}
-
-		if(!strcmp(value, name)) {
-			fprintf(stderr, "Secondary chunk would overwrite our own host config file.\n");
-			return false;
-		}
-
-		snprintf(filename,PATH_MAX, "%s" SLASH "%s", hosts_dir, value);
-		f = fopen(filename, "w");
-
-		if(!f) {
-			fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
-			return false;
-		}
-
-		while((l = get_line(&p))) {
-			if(!strcmp(l, "#---------------------------------------------------------------#"))
-				continue;
-			int len = strcspn(l, "\t =");
-			if(len == 4 && !strncasecmp(l, "Name", 4)) {
-				value = l + len;
-				value += strspn(value, "\t ");
-				if(*value == '=') {
-					value++;
-					value += strspn(value, "\t ");
-				}
-				l[len] = 0;
-				break;
-			}
-
-			fputs(l, f);
-			fputc('\n', f);
-		}
-
-		fclose(f);
-	}
-
-	// Generate our key and send a copy to the server
-	ecdsa_t *key = ecdsa_generate();
-	if(!key)
-		return false;
-
-	char *b64key = ecdsa_get_base64_public_key(key);
-	if(!b64key)
-		return false;
-
-	snprintf(filename,PATH_MAX, "%s" SLASH "ecdsa_key.priv", confbase);
-	f = fopenmask(filename, "w", 0600);
-
-	if(!ecdsa_write_pem_private_key(key, f)) {
-		fprintf(stderr, "Error writing private key!\n");
-		ecdsa_free(key);
-		fclose(f);
-		return false;
-	}
-
-	fclose(f);
-
-	fprintf(fh, "ECDSAPublicKey = %s\n", b64key);
-
-	sptps_send_record(&sptps, 1, b64key, strlen(b64key));
-	free(b64key);
-
-	ecdsa_free(key);
-
-	check_port(name);
-
-ask_netname:
-	if(ask_netname && tty) {
-		fprintf(stderr, "Enter a new netname: ");
-		if(!fgets(line, sizeof line, stdin)) {
-			fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
-			return false;
-		}
-		if(!*line || *line == '\n')
-			goto ask_netname;
-
-		line[strlen(line) - 1] = 0;
-
-		char *newbase;
-		xasprintf(&newbase, CONFDIR SLASH "tinc" SLASH "%s", line);
-		if(rename(confbase, newbase)) {
-			fprintf(stderr, "Error trying to rename %s to %s: %s\n", confbase, newbase, strerror(errno));
-			free(newbase);
-			goto ask_netname;
-		}
-
-		free(newbase);
-		netname = line;
-	}
-
-	fprintf(stderr, "Configuration stored in: %s\n", confbase);
-
-	return true;
-}
-
-
-static bool invitation_send(void *handle, uint8_t type, const char *data, size_t len) {
-	while(len) {
-		int result = send(sock, data, len, 0);
-		if(result == -1 && errno == EINTR)
-			continue;
-		else if(result <= 0)
-			return false;
-		data += result;
-		len -= result;
-	}
-	return true;
-}
-
-static bool invitation_receive(void *handle, uint8_t type, const char *msg, uint16_t len) {
-	switch(type) {
-		case SPTPS_HANDSHAKE:
-			return sptps_send_record(&sptps, 0, cookie, sizeof cookie);
-
-		case 0:
-			data = xrealloc(data, datalen + len + 1);
-			memcpy(data + datalen, msg, len);
-			datalen += len;
-			data[datalen] = 0;
-			break;
-
-		case 1:
-			return finalize_join();
-
-		case 2:
-			fprintf(stderr, "Invitation succesfully accepted.\n");
-			shutdown(sock, SHUT_RDWR);
-			success = true;
-			break;
-
-		default:
-			return false;
-	}
-
-	return true;
-}
-
-int cmd_join(int argc, char *argv[]) {
-	free(data);
-	data = NULL;
-	datalen = 0;
-
-	if(argc > 2) {
-		fprintf(stderr, "Too many arguments!\n");
-		return 1;
-	}
-
-	// Make sure confbase exists and is accessible.
-	if(mkdir(confbase, 0777) && errno != EEXIST) {
-		fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
-		return 1;
-	}
-
-	if(access(confbase, R_OK | W_OK | X_OK)) {
-		fprintf(stderr, "No permission to write in directory %s: %s\n", confbase, strerror(errno));
-		return 1;
-	}
-
-	// If a netname or explicit configuration directory is specified, check for an existing tinc.conf.
-	if((netname || confbasegiven) && !access(tinc_conf, F_OK)) {
-		fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
-		return 1;
-	}
-
-	// Either read the invitation from the command line or from stdin.
-	char *invitation;
-
-	if(argc > 1) {
-		invitation = argv[1];
-	} else {
-		if(tty)
-			fprintf(stderr, "Enter invitation URL: ");
-		errno = EPIPE;
-		if(!fgets(line, sizeof line, stdin)) {
-			fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
-			return false;
-		}
-		invitation = line;
-	}
-
-	// Parse the invitation URL.
-	rstrip(line);
-
-	char *slash = strchr(invitation, '/');
-	if(!slash)
-		goto invalid;
-
-	*slash++ = 0;
-
-	if(strlen(slash) != 48)
-		goto invalid;
-
-	char *address = invitation;
-	char *port = NULL;
-	if(*address == '[') {
-		address++;
-		char *bracket = strchr(address, ']');
-		if(!bracket)
-			goto invalid;
-		*bracket = 0;
-		if(bracket[1] == ':')
-			port = bracket + 2;
-	} else {
-		port = strchr(address, ':');
-		if(port)
-			*port++ = 0;
-	}
-
-	if(!port || !*port)
-		port = "655";
-
-	if(!b64decode(slash, hash, 18) || !b64decode(slash + 24, cookie, 18))
-		goto invalid;
-
-	// Generate a throw-away key for the invitation.
-	ecdsa_t *key = ecdsa_generate();
-	if(!key)
-		return 1;
-
-	char *b64key = ecdsa_get_base64_public_key(key);
-
-	// Connect to the tinc daemon mentioned in the URL.
-	struct addrinfo *ai = str2addrinfo(address, port, SOCK_STREAM);
-	if(!ai)
-		return 1;
-
-	sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
-	if(sock <= 0) {
-		fprintf(stderr, "Could not open socket: %s\n", strerror(errno));
-		return 1;
-	}
-
-	if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
-		fprintf(stderr, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
-		closesocket(sock);
-		return 1;
-	}
-
-	fprintf(stderr, "Connected to %s port %s...\n", address, port);
-
-	// Tell him we have an invitation, and give him our throw-away key.
-	int len = snprintf(line, sizeof line, "0 ?%s %d.%d\n", b64key, PROT_MAJOR, PROT_MINOR);
-	if(len <= 0 || len >= sizeof line)
-		abort();
-
-	if(!sendline(sock, "0 ?%s %d.%d", b64key, PROT_MAJOR, 1)) {
-		fprintf(stderr, "Error sending request to %s port %s: %s\n", address, port, strerror(errno));
-		closesocket(sock);
-		return 1;
-	}
-
-	char hisname[4096] = "";
-	int code, hismajor, hisminor = 0;
-
-	if(!recvline(sock, line, sizeof line) || sscanf(line, "%d %s %d.%d", &code, hisname, &hismajor, &hisminor) < 3 || code != 0 || hismajor != PROT_MAJOR || !check_id(hisname) || !recvline(sock, line, sizeof line) || !rstrip(line) || sscanf(line, "%d ", &code) != 1 || code != ACK || strlen(line) < 3) {
-		fprintf(stderr, "Cannot read greeting from peer\n");
-		closesocket(sock);
-		return 1;
-	}
-
-	// Check if the hash of the key he gave us matches the hash in the URL.
-	char *fingerprint = line + 2;
-	char hishash[64];
-	if(!sha512(fingerprint, strlen(fingerprint), hishash)) {
-		fprintf(stderr, "Could not create hash\n%s\n", line + 2);
-		return 1;
-	}
-	if(memcmp(hishash, hash, 18)) {
-		fprintf(stderr, "Peer has an invalid key!\n%s\n", line + 2);
-		return 1;
-
-	}
-	
-	ecdsa_t *hiskey = ecdsa_set_base64_public_key(fingerprint);
-	if(!hiskey)
-		return 1;
-
-	// Start an SPTPS session
-	if(!sptps_start(&sptps, NULL, true, false, key, hiskey, "tinc invitation", 15, invitation_send, invitation_receive))
-		return 1;
-
-	// Feed rest of input buffer to SPTPS
-	if(!sptps_receive_data(&sptps, buffer, blen))
-		return 1;
-
-	while((len = recv(sock, line, sizeof line, 0))) {
-		if(len < 0) {
-			if(errno == EINTR)
-				continue;
-			fprintf(stderr, "Error reading data from %s port %s: %s\n", address, port, strerror(errno));
-			return 1;
-		}
-
-		if(!sptps_receive_data(&sptps, line, len))
-			return 1;
-	}
-	
-	sptps_stop(&sptps);
-	ecdsa_free(hiskey);
-	ecdsa_free(key);
-	closesocket(sock);
-
-	if(!success) {
-		fprintf(stderr, "Connection closed by peer, invitation cancelled.\n");
-		return 1;
-	}
-
-	return 0;
-
-invalid:
-	fprintf(stderr, "Invalid invitation URL.\n");
-	return 1;
-}
diff --git a/src/invitation.h b/src/invitation.h
deleted file mode 100644
index b3d48cc9..00000000
--- a/src/invitation.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
-    invitation.h -- header for invitation.c.
-    Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
-
-#ifndef __TINC_INVITATION_H__
-#define __TINC_INVITATION_H__
-
-bool recvdata(int fd, char *data, size_t len);
-int cmd_invite(int argc, char *argv[]);
-int cmd_join(int argc, char *argv[]);
-
-#endif
-- 
2.39.5