From 810dde21ee65653c15606917b19566cfbaaf165e Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Tue, 9 Aug 2022 21:54:45 +0200
Subject: ecp server added

---
 ecp/test/vc_common.c | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 ecp/test/vc_common.c

(limited to 'ecp/test/vc_common.c')

diff --git a/ecp/test/vc_common.c b/ecp/test/vc_common.c
new file mode 100644
index 0000000..0508ac1
--- /dev/null
+++ b/ecp/test/vc_common.c
@@ -0,0 +1,127 @@
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include <ecp/core.h>
+#include <ecp/dir/dir.h>
+#include <ecp/vconn/vconn.h>
+
+#include <openssl/crypto.h>
+#include <openssl/sha.h>
+
+#include "vc_common.h"
+
+#define VCONN_NODES 3
+
+#define MIN(X, Y)           (((X) < (Y)) ? (X) : (Y))
+#define MAX(X, Y)           (((X) > (Y)) ? (X) : (Y))
+
+static void msg_remove_item(unsigned char *msg, uint16_t i, uint16_t c) {
+    if (c - i - 1) memmove(msg + i * ECP_SIZE_DIR_ITEM, msg + (i + 1) * ECP_SIZE_DIR_ITEM, (c - i - 1) * ECP_SIZE_DIR_ITEM);
+}
+
+static void hrw_select(unsigned char *msg, uint16_t count, ecp_ecdh_public_t *pub, ecp_ecdh_public_t *hrw_pub, ecp_ecdh_public_t vconn_pub[], size_t *_vconn_size, ecp_tr_addr_t *addr) {
+    unsigned char *_msg = msg;
+    unsigned char hash[SHA_DIGEST_LENGTH];
+    unsigned char hrw_hash[SHA_DIGEST_LENGTH];
+    ecp_ecdh_public_t hash_pub[2];
+    size_t vconn_size = *_vconn_size;
+    ECPDirItem dir_item;
+    SHA_CTX ctx;
+    int i, hrw_i;
+
+    if (count == 0) return;
+
+    memset(hrw_hash, 0, sizeof(hrw_hash));
+    memcpy(&hash_pub[0], pub, sizeof(ecp_ecdh_public_t));
+
+    for (i=0; i<count; i++) {
+        unsigned char *host;
+        uint16_t port;
+        size_t rv;
+
+        rv = ecp_dir_item_parse(&dir_item, _msg);
+        _msg += rv;
+
+        host = dir_item.node.addr.host;
+        port = dir_item.node.addr.port;
+        printf("ITEM: %d.%d.%d.%d:%d\n", host[0], host[1], host[2], host[3], ntohs(port));
+
+        memcpy(&hash_pub[1], &dir_item.node.key_perma.public, sizeof(ecp_ecdh_public_t));
+        SHA1_Init(&ctx);
+        SHA1_Update(&ctx, hash_pub, sizeof(hash_pub));
+        SHA1_Final(hash, &ctx);
+        if (memcmp(hrw_hash, hash, sizeof(hash)) < 0) {
+            hrw_i = i;
+            memcpy(hrw_hash, hash, sizeof(hash));
+            memcpy(hrw_pub, &dir_item.node.key_perma, sizeof(ecp_ecdh_public_t));
+        }
+    }
+
+    printf("SELECTED: %d\n", hrw_i);
+    msg_remove_item(msg, hrw_i, count);
+    count--;
+
+    vconn_size = MIN(count, vconn_size);
+    for (i=0; i<vconn_size; i++) {
+        uint16_t s;
+
+        s = arc4random() % count;
+        _msg = msg + s * ECP_SIZE_DIR_ITEM;
+        ecp_dir_item_parse(&dir_item, _msg);
+        memcpy(&vconn_pub[i], &dir_item.node.key_perma, sizeof(ecp_ecdh_public_t));
+        if (i==0) *addr = dir_item.node.addr;
+        msg_remove_item(msg, s, count);
+        count--;
+    }
+    *_vconn_size = vconn_size;
+}
+
+int vc_open_inb(ECPConnection *vlink, unsigned char *msg, uint16_t count, ecp_ecdh_public_t *local_pub) {
+    ecp_ecdh_public_t vconn_pub[VCONN_NODES - 1];
+    ecp_ecdh_public_t hrw_pub;
+    ecp_tr_addr_t addr;
+    ECPNode node;
+    ECPVConnOutb *vconn;
+    size_t vconn_size;
+    int rv;
+
+    vconn_size = VCONN_NODES - 1;
+    hrw_select(msg, count, local_pub, &hrw_pub, vconn_pub, &vconn_size, &addr);
+
+    vconn = malloc(sizeof(ECPVConnOutb) * vconn_size);
+    if (vconn == NULL) return ECP_ERR_ALLOC;
+
+    ecp_vconn_init(vconn, vconn_pub, vconn_size, vlink->sock);
+    ecp_node_init(&node, &hrw_pub, &addr);
+    rv = ecp_vconn_open(vconn, vlink, &node);
+    printf("ecp_vconn_open RV:%d\n", rv);
+
+    return ECP_OK;
+}
+
+int vc_open_outb(ECPConnection *conn, unsigned char *msg, uint16_t count, ecp_ecdh_public_t *remote_pub) {
+    ecp_ecdh_public_t vconn_pub[VCONN_NODES];
+    ecp_ecdh_public_t hrw_pub;
+    ecp_tr_addr_t addr;
+    ECPNode node;
+    ECPVConnOutb *vconn;
+    size_t vconn_size;
+    int rv;
+
+    vconn_size = VCONN_NODES - 1;
+    hrw_select(msg, count, remote_pub, &hrw_pub, vconn_pub, &vconn_size, &addr);
+    memcpy(&vconn_pub[vconn_size], &hrw_pub, sizeof(ecp_ecdh_public_t));
+    vconn_size++;
+
+    vconn = malloc(sizeof(ECPVConnOutb) * vconn_size);
+    if (vconn == NULL) return ECP_ERR_ALLOC;
+
+    ecp_vconn_init(vconn, vconn_pub, vconn_size, conn->sock);
+    ecp_node_init(&node, remote_pub, &addr);
+    rv = ecp_vconn_open(vconn, conn, &node);
+    printf("ecp_vconn_open RV:%d\n", rv);
+
+    return ECP_OK;
+}
-- 
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