Adding a node returns a pointer to the new node.
This should help to edit aspects of it, such as whether or not it is a directory and such.
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@ -19,6 +19,24 @@
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#pragma once
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/**
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* @brief Simple address structure providing IP/DNS and port information.
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*/
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struct address {
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char *address; ///< IP/DNS string.
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unsigned short port; ///< Port of address.
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};
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struct node {
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// The address of the node
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struct address address;
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// Whether or not it is a directory node/server
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int directory;
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// Useful variables for passing on connections of new nodes
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unsigned int connections;
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unsigned int max_connections;
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};
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/**
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* @brief Initialize the node list.
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* @details This function allocates memory and prepares the nodes list, you
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@ -56,21 +74,30 @@ unsigned int NeoComm_get_node_max();
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unsigned int NeoComm_get_node_count();
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/**
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* @brief Add a new node to the list with an address (normally IP) and port.
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* @brief Add a new node where only address is given (all other variables
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* are set to 0).
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*
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* @param addr Address of the new node (normally an IP, but also DNS).
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* @param port Port number for new node.
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* @param addr Address of the new node.
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*
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* @return If the node list is full it will return 0, else 1.
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* @return If the list is full then it will return NULL, else it will return
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* a pointer to the new (or old, if already existing) node.
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*/
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int NeoComm_add_node(char *addr, unsigned short port);
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struct node *NeoComm_add_node(struct address addr);
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/**
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* @brief Remove a node from the list.
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*
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* @param addr The address of the node.
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* @param port The public port of the node.
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*
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* @return If the node was not found it returns 0, else it returns 1.
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*/
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int NeoComm_remove_node(char *addr, unsigned short port);
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int NeoComm_remove_node(struct address addr);
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/**
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* @brief Get a pointer to the node with a given address.
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*
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* @param addr The address of the node.
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*
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* @return A modifiable pointer to the node or NULL if not found.
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*/
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struct node *NeoComm_get_node(struct address addr);
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61
src/nodes.c
61
src/nodes.c
@ -22,17 +22,6 @@
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#include <stdlib.h>
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#include <string.h>
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struct node {
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// The address of the node
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char *address;
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unsigned short port;
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// Whether or not it is a directory node/server
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int directory;
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// Useful variables for passing on connections of new nodes
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unsigned int connections;
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unsigned int max_connections;
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};
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// List of nodes
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static struct node *node_list;
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// Maximum number of nodes
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@ -46,7 +35,7 @@ int NeoComm_init_nodes(unsigned int max_nodes) {
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return 0;
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for(unsigned int i = 0; i < max_nodes; ++i)
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node_list[i].address = NULL;
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node_list[i].address.address = NULL;
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node_max = max_nodes;
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node_count = 0;
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@ -75,42 +64,41 @@ unsigned int NeoComm_get_node_count() {
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return node_count;
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}
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int NeoComm_add_node(char *addr, unsigned short port) {
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struct node *NeoComm_add_node(struct address addr) {
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if(node_count >= node_max)
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return 0;
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for(unsigned int i = 0; i < node_count; ++i)
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return NULL;
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for(unsigned int i = 0; i < node_max; ++i)
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{
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if(strcmp(node_list[i].address, addr) == 0 &&
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node_list[i].port == port)
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return 1;
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if(strcmp(node_list[i].address.address, addr.address) == 0 &&
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node_list[i].address.port == addr.port)
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return &node_list[i];
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}
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for(unsigned int i = 0; i < node_max; ++i)
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{
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if(!node_list[i].address)
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if(!node_list[i].address.address)
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{
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node_list[i].address = addr;
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node_list[i].port = port;
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node_list[i].address.address = addr.address;
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node_list[i].address.port = addr.port;
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node_list[i].directory = 0;
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node_list[i].connections = 0;
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node_list[i].max_connections = 0;
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break;
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node_count++;
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return &node_list[i];
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}
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}
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node_count++;
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return 1;
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return NULL;
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}
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int NeoComm_remove_node(char *addr, unsigned short port) {
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int NeoComm_remove_node(struct address addr) {
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int removed = 0;
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for(unsigned int i = 0; i < node_count; ++i)
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for(unsigned int i = 0; i < node_max; ++i)
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{
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if(!removed && strcmp(node_list[i].address, addr) == 0 &&
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node_list[i].port == port)
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if(!removed && strcmp(node_list[i].address.address,
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addr.address) == 0 &&
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node_list[i].address.port == addr.port)
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{
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node_list[i].address = NULL;
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node_list[i].address.address = NULL;
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node_count--;
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removed = 1;
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break;
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@ -120,3 +108,14 @@ int NeoComm_remove_node(char *addr, unsigned short port) {
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return 0;
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return 1;
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}
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struct node *NeoComm_get_node(struct address addr) {
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for(unsigned int i = 0; i < node_max; ++i)
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{
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if(strcmp(node_list[i].address.address, addr.address) == 0 &&
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node_list[i].address.port == addr.port) {
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return &node_list[i];
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}
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}
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return NULL;
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}
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