nortega/neocomm
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Adding a node returns a pointer to the new node.

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This should help to edit aspects of it, such as whether or not it is a
directory and such.
This commit is contained in:
Nicolás A. Ortega 2017-07-02 13:06:36 +02:00
parent 605a91bc41
commit cafe6a7243
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GPG Key ID: 3D786FB3123FF1DD
2 changed files with 64 additions and 38 deletions
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41
include/nodes.h
View File

@ -19,6 +19,24 @@
#pragma once
/**
* @brief Simple address structure providing IP/DNS and port information.
*/
struct address {
char *address; ///< IP/DNS string.
unsigned short port; ///< Port of address.
};
struct node {
// The address of the node
struct address address;
// Whether or not it is a directory node/server
int directory;
// Useful variables for passing on connections of new nodes
unsigned int connections;
unsigned int max_connections;
};
/**
* @brief Initialize the node list.
* @details This function allocates memory and prepares the nodes list, you
@ -56,21 +74,30 @@ unsigned int NeoComm_get_node_max();
unsigned int NeoComm_get_node_count();
/**
* @brief Add a new node to the list with an address (normally IP) and port.
* @brief Add a new node where only address is given (all other variables
* are set to 0).
*
* @param addr Address of the new node (normally an IP, but also DNS).
* @param port Port number for new node.
* @param addr Address of the new node.
*
* @return If the node list is full it will return 0, else 1.
* @return If the list is full then it will return NULL, else it will return
* a pointer to the new (or old, if already existing) node.
*/
int NeoComm_add_node(char *addr, unsigned short port);
struct node *NeoComm_add_node(struct address addr);
/**
* @brief Remove a node from the list.
*
* @param addr The address of the node.
* @param port The public port of the node.
*
* @return If the node was not found it returns 0, else it returns 1.
*/
int NeoComm_remove_node(char *addr, unsigned short port);
int NeoComm_remove_node(struct address addr);
/**
* @brief Get a pointer to the node with a given address.
*
* @param addr The address of the node.
*
* @return A modifiable pointer to the node or NULL if not found.
*/
struct node *NeoComm_get_node(struct address addr);

61
src/nodes.c
View File

@ -22,17 +22,6 @@
#include <stdlib.h>
#include <string.h>
struct node {
// The address of the node
char *address;
unsigned short port;
// Whether or not it is a directory node/server
int directory;
// Useful variables for passing on connections of new nodes
unsigned int connections;
unsigned int max_connections;
};
// List of nodes
static struct node *node_list;
// Maximum number of nodes
@ -46,7 +35,7 @@ int NeoComm_init_nodes(unsigned int max_nodes) {
return 0;
for(unsigned int i = 0; i < max_nodes; ++i)
node_list[i].address = NULL;
node_list[i].address.address = NULL;
node_max = max_nodes;
node_count = 0;
@ -75,42 +64,41 @@ unsigned int NeoComm_get_node_count() {
return node_count;
}
int NeoComm_add_node(char *addr, unsigned short port) {
struct node *NeoComm_add_node(struct address addr) {
if(node_count >= node_max)
return 0;
for(unsigned int i = 0; i < node_count; ++i)
return NULL;
for(unsigned int i = 0; i < node_max; ++i)
{
if(strcmp(node_list[i].address, addr) == 0 &&
node_list[i].port == port)
return 1;
if(strcmp(node_list[i].address.address, addr.address) == 0 &&
node_list[i].address.port == addr.port)
return &node_list[i];
}
for(unsigned int i = 0; i < node_max; ++i)
{
if(!node_list[i].address)
if(!node_list[i].address.address)
{
node_list[i].address = addr;
node_list[i].port = port;
node_list[i].address.address = addr.address;
node_list[i].address.port = addr.port;
node_list[i].directory = 0;
node_list[i].connections = 0;
node_list[i].max_connections = 0;
break;
node_count++;
return &node_list[i];
}
}
node_count++;
return 1;
return NULL;
}
int NeoComm_remove_node(char *addr, unsigned short port) {
int NeoComm_remove_node(struct address addr) {
int removed = 0;
for(unsigned int i = 0; i < node_count; ++i)
for(unsigned int i = 0; i < node_max; ++i)
{
if(!removed && strcmp(node_list[i].address, addr) == 0 &&
node_list[i].port == port)
if(!removed && strcmp(node_list[i].address.address,
addr.address) == 0 &&
node_list[i].address.port == addr.port)
{
node_list[i].address = NULL;
node_list[i].address.address = NULL;
node_count--;
removed = 1;
break;
@ -120,3 +108,14 @@ int NeoComm_remove_node(char *addr, unsigned short port) {
return 0;
return 1;
}
struct node *NeoComm_get_node(struct address addr) {
for(unsigned int i = 0; i < node_max; ++i)
{
if(strcmp(node_list[i].address.address, addr.address) == 0 &&
node_list[i].address.port == addr.port) {
return &node_list[i];
}
}
return NULL;
}