silcnet.c
- Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+ Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2000 Pekka Riikonen
+ Copyright (C) 1997 - 2001 Pekka Riikonen
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
#include "silcincludes.h"
#include "silcnet.h"
-/* This function creates server or daemon or listener or what ever. This
- does not fork a new process, it must be done by the caller if caller
- wants to create a child process. This is used by the SILC server.
- If argument `ip_addr' is NULL `any' address will be used. Returns
- the created socket or -1 on error. */
-
-int silc_net_create_server(int port, char *ip_addr)
-{
- int sock, rval;
- struct sockaddr_in server;
-
- SILC_LOG_DEBUG(("Creating a new server listener"));
-
- /* Create the socket */
- sock = socket(PF_INET, SOCK_STREAM, 0);
- if (sock < 0) {
- SILC_LOG_ERROR(("Cannot create socket: %s", strerror(errno)));
- return -1;
- }
-
- /* Set the socket options */
- rval = silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
- if (rval < 0) {
- SILC_LOG_ERROR(("Cannot set socket options: %s", strerror(errno)));
- return -1;
- }
-
- /* Set the socket information for bind() */
- memset(&server, 0, sizeof(server));
- server.sin_family = PF_INET;
- if (port)
- server.sin_port = htons(port);
-
- /* Convert IP address to network byte order */
- if (ip_addr)
- inet_aton(ip_addr, &server.sin_addr);
- else
- server.sin_addr.s_addr = INADDR_ANY;
-
- /* Bind the server socket */
- rval = bind(sock, (struct sockaddr *)&server, sizeof(server));
- if (rval < 0) {
- SILC_LOG_ERROR(("Cannot bind socket: %s", strerror(errno)));
- return -1;
- }
-
- /* Specify that we are listenning */
- rval = listen(sock, 5);
- if (rval < 0) {
- SILC_LOG_ERROR(("Cannot set socket listenning: %s", strerror(errno)));
- return -1;
- }
-
- /* Set the server socket to non-blocking mode */
- silc_net_set_socket_nonblock(sock);
-
- SILC_LOG_DEBUG(("Server listener created, fd=%d", sock));
-
- return sock;
-}
-
-void silc_net_close_server(int sock)
-{
- shutdown(sock, 2);
- close(sock);
-
- SILC_LOG_DEBUG(("Server socket closed"));
-}
-
-/* Creates a connection (TCP/IP) to a remote host. Returns the connection
- socket or -1 on error. This blocks the process while trying to create
- the connection. */
-
-int silc_net_create_connection(int port, char *host)
-{
- int sock, rval;
- struct hostent *dest;
- struct sockaddr_in desthost;
-
- SILC_LOG_DEBUG(("Creating connection to host %s port %d", host, port));
-
- /* Do host lookup */
- dest = gethostbyname(host);
- if (!dest) {
- SILC_LOG_ERROR(("Network (%s) unreachable", host));
- return -1;
- }
-
- /* Set socket information */
- memset(&desthost, 0, sizeof(desthost));
- desthost.sin_port = htons(port);
- desthost.sin_family = PF_INET;
- memcpy(&desthost.sin_addr, dest->h_addr_list[0], sizeof(desthost.sin_addr));
-
- /* Create the connection socket */
- sock = socket(PF_INET, SOCK_STREAM, 0);
- if (sock < 0) {
- SILC_LOG_ERROR(("Cannot create socket: %s", strerror(errno)));
- return -1;
- }
-
- /* Connect to the host */
- rval = connect(sock, (struct sockaddr *)&desthost, sizeof(desthost));
- if (rval < 0) {
- SILC_LOG_ERROR(("Cannot connect to remote host: %s", strerror(errno)));
- shutdown(sock, 2);
- close(sock);
- return -1;
- }
-
- /* Set appropriate options */
- silc_net_set_socket_opt(sock, IPPROTO_TCP, TCP_NODELAY, 1);
- silc_net_set_socket_opt(sock, SOL_SOCKET, SO_KEEPALIVE, 1);
-
- SILC_LOG_DEBUG(("Connection created"));
-
- return sock;
-}
-
-/* Creates a connection (TCP/IP) to a remote host. Returns the connection
- socket or -1 on error. This creates non-blocking socket hence the
- connection returns directly. To get the result of the connect() one
- must select() the socket and read the result after it's ready. */
-
-int silc_net_create_connection_async(int port, char *host)
-{
- int sock, rval;
- struct hostent *dest;
- struct sockaddr_in desthost;
-
- SILC_LOG_DEBUG(("Creating connection (async) to host %s port %d",
- host, port));
-
- /* Do host lookup */
- dest = gethostbyname(host);
- if (!dest) {
- SILC_LOG_ERROR(("Network (%s) unreachable", host));
- return -1;
- }
-
- /* Set socket information */
- memset(&desthost, 0, sizeof(desthost));
- desthost.sin_port = htons(port);
- desthost.sin_family = PF_INET;
- memcpy(&desthost.sin_addr, dest->h_addr_list[0], sizeof(desthost.sin_addr));
-
- /* Create the connection socket */
- sock = socket(PF_INET, SOCK_STREAM, 0);
- if (sock < 0) {
- SILC_LOG_ERROR(("Cannot create socket: %s", strerror(errno)));
- return -1;
- }
-
- /* Set the socket to non-blocking mode */
- silc_net_set_socket_nonblock(sock);
-
- /* Connect to the host */
- rval = connect(sock, (struct sockaddr *)&desthost, sizeof(desthost));
- if (rval < 0) {
- if (errno != EINPROGRESS) {
- SILC_LOG_ERROR(("Cannot connect to remote host: %s", strerror(errno)));
- shutdown(sock, 2);
- close(sock);
- return -1;
- }
- }
-
- /* Set appropriate options */
- silc_net_set_socket_opt(sock, IPPROTO_TCP, TCP_NODELAY, 1);
- silc_net_set_socket_opt(sock, SOL_SOCKET, SO_KEEPALIVE, 1);
-
- SILC_LOG_DEBUG(("Connection operation in progress"));
-
- return sock;
-}
-
-/* Closes the connection */
-
-void silc_net_close_connection(int sock)
-{
- close(sock);
-}
-
/* Accepts a connection from a particular socket */
int silc_net_accept_connection(int sock)
return accept(sock, 0, 0);
}
-/* Set's the socket to non-blocking mode. */
-
-int silc_net_set_socket_nonblock(int sock)
-{
- return fcntl(sock, F_SETFL, fcntl(sock, F_GETFL, 0) | O_NONBLOCK);
-}
-
/* Sets a option for a socket. */
int silc_net_set_socket_opt(int sock, int level, int option, int on)
int silc_net_is_ip(const char *addr)
{
struct in_addr tmp;
- return inet_aton(addr, &tmp);
+ int len = sizeof(tmp);
+ return silc_net_addr2bin(addr, (unsigned char *)&tmp.s_addr, len);
}
/* Performs lookups for remote name and IP address. This peforms reverse
projects / crypto.git / blobdiff