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sockets.c
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sockets.c
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// Sockets.c
//
// Copyright (C) 2007 David J. Goehrig
// All Rights Reserved
//
#include "include.h"
#include "defines.h"
#include "str.h"
#include "log.h"
#include "sockets.h"
#include "timers.h"
#include "hostnames.h"
#include "client.h"
#include "server.h"
#include "tls.h"
#define STREAM 1
#define PACKET 0
void
signal_handler(int sig)
{
if (client.response->socket) client.response->socket->closed = 1;
}
void
socket_signal_handlers()
{
signal(SIGPIPE,signal_handler);
}
int
nonblock(reg fd)
{
int flags = fcntl(fd,F_GETFL,0);
return fcntl(fd,F_SETFL,flags | O_NONBLOCK);
}
int
keepalive(reg fd)
{
int value = 1 ;
return setsockopt(fd,SOL_SOCKET,SO_KEEPALIVE,&value,sizeof(int));
}
int
nodelay(reg fd)
{
int value = 1;
return setsockopt(fd,IPPROTO_TCP,TCP_NODELAY,&value,sizeof(int));
}
int
socket_timeout(reg fd, size_t seconds)
{
timeout(seconds,0);
return setsockopt(fd,SOL_SOCKET,SO_RCVTIMEO,&Timeout,sizeof(Timeout))
&& setsockopt(fd,SOL_SOCKET,SO_SNDTIMEO,&Timeout,sizeof(Timeout));
}
int
new_socket(int stream)
{
int one = 1;
reg fd = socket(AF_INET,stream ? SOCK_STREAM : SOCK_DGRAM,0);
if (0 > fd) return 0;
if (setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,&one,sizeof(one))) {
perror("setsockopt");
exit(0);
}
return fd;
}
int
bind_socket(reg fd, IPAddress addr, int port)
{
attachTo(addr,port);
if (bind(fd,(struct sockaddr*)&Address,sizeof(Address))) {
error("Failed to bind to port %i\n",port);
close(fd);
return 0;
}
return fd;
}
int
listen_socket(reg fd)
{
if (listen(fd,128)) { // See man page on listen
close(fd);
return 0;
}
return fd;
}
int
open_socket(int port)
{
reg fd = new_socket(STREAM);
if (!bind_socket(fd,(IPAddress)0,port)) error("Failed to bind to port %i",port);
if (!listen_socket(fd)) error("Failed to listen to port %i",port);
return fd;
}
Socket
resume_socket(Socket sc)
{
sc->host = NULL;
sc->buf = NULL;
sc->closed = 0;
return sc;
}
Socket
create_socket(reg fd, TLSInfo tls)
{
Socket retval = (Socket)reserve(sizeof(struct socket_cache_struct));
retval->fd = fd;
retval->tls= (tls ? open_tls(tls,fd) : NULL);
retval->peer = Address.sin_addr.s_addr;
retval->port = Address.sin_port;
return resume_socket(retval);
}
Socket
accept_socket(reg fd, TLSInfo tls)
{
Address_len = sizeof(Address);
reg sock = accept(fd,(struct sockaddr*)&Address,(socklen_t*)&Address_len);
if (sock < 1) {
error("[JAWAS] failed to accept socket");
return NULL;
}
nonblock(sock);
keepalive(sock);
socket_timeout(sock,SOCKET_CONNECT_TIMEOUT);
Socket retval = create_socket(sock,tls);
while (tls && 0 < accept_tls(retval->tls));
return retval;
}
Socket
connect_socket(str host, int port, int ssl)
{
Socket retval;
int i;
IPAddress* ipaddrs = lookup(host);
int sock = new_socket(1);
if (!sock) {
error("[JAWAS] failed to create socket");
return NULL;
}
int connected = 0;
for (i = 0; ipaddrs[i]; ++i) {
debug("Connecting to socket %s",ipaddress(ipaddrs[i],port));
attachTo(ipaddrs[i],port);
timeout(SOCKET_CONNECT_TIMEOUT,0);
timer();
connected = 1;
if (connect(sock,(struct sockaddr*)&Address,Address_len)) {
if (client.alarm) {
error("[JAWAS] socket conect timeout!");
client.alarm = 0;
}
perror("connect");
error("[JAWAS] failed to connect to %c:%i",host,port);
connected = 0;
continue;
}
client.alarm = 0;
timeout(0,0);
timer();
break;
}
if (!connected) return NULL;
keepalive(sock);
socket_timeout(sock,SOCKET_CONNECT_TIMEOUT);
retval = create_socket(sock,ssl ? server.tls_client :NULL);
retval->host = _("%c",host);
retval->peer = Address.sin_addr.s_addr;
retval->port = port;
if (ssl && (connect_tls(retval->tls) ||check_tls(retval->tls))) {
error("[SSL] Failed to make secure connection");
return NULL;
}
return retval;
}
void
close_socket(Socket sc)
{
if (!sc) return;
if (sc->tls) close_tls(sc->tls);
close(sc->fd);
}
str
read_socket(Socket sc)
{
int delta;
for (sc->buf = sc->buf ? clone(sc->buf) : blank(0);
(delta = sc->tls ?
read_tls(sc->tls,sc->buf->data + sc->buf->length,Max_Buffer_Size) :
read(sc->fd,sc->buf->data + sc->buf->length,Max_Buffer_Size));
sc->buf->length += advance(delta)) {
// fprintf(stderr,"Read %i bytes at %p\n",delta,sc->buf);
if (delta == 0) {
fprintf(stderr,"READ ZERO!!!\n");
sc->closed = 1;
return sc->buf;
}
if (delta == -1 ) {
if (errno == EAGAIN) {
// fprintf(stderr,"Returning %d bytes [%s]\n",len(sc->buf),sc->buf->data);
return sc->buf;
}
error("ERROR %i occured", errno);
return NULL;
}
}
return sc->buf;
}
int
write_to_socket(Socket sc,char* data, int length)
{
if (sc->closed) return 0;
int retval = sc->tls ? write_tls(sc->tls,data,length) : write(sc->fd,data,length);
if (retval < 0) {
sc->closed = 1;
return 0;
}
return retval;
}
int
write_socket(Socket sc, str buf)
{
if (! sc || !buf) return 0;
return write_to_socket(sc,buf->data,buf->length);
}
int
write_chunk(Socket sc, char* data, int length)
{
int retval = 0;
str header = _("%h\r\n",length);
write_to_socket(sc,header->data,header->length);
if (data) retval = write_to_socket(sc,data,length);
write_to_socket(sc,"\r\n",2);
return retval;
}
int
write_chunked_socket(Socket sc, str buf)
{
if (!sc) return 0;
int i, retval = 0;
for (i = 0; i < buf->length; i += MAX_WRITE_SIZE)
retval += write_chunk(sc,buf->data + i,min(MAX_WRITE_SIZE,buf->length - i));
return retval;
}
int
send_contents(Socket sc, str buf, int chunked)
{
if (!sc || !buf) return 0;
return chunked ? write_chunked_socket(sc,buf) : write_socket(sc,buf);
}
int
write_raw_socket(Socket sc, char* data, int length)
{
int retval = write_to_socket(sc,data,length);
if (retval < 0) {
retval = 0;
sc->closed = 1;
}
return retval;
}
int
write_raw_chunked_socket(Socket sc, char *data, int length)
{
int retval = write_chunk(sc,data,length);
if (retval < 0) {
retval = 0;
sc->closed = 1;
}
return retval;
}
int
send_raw_contents(Socket sc, File fc, int off, int chunked)
{
if (!sc || !fc) return 0;
return chunked ?
write_raw_chunked_socket(sc,fc->data+off,min(fc->st.st_size-off,MAX_WRITE_SIZE)) :
write_raw_socket(sc,fc->data +off,min(fc->st.st_size-off,MAX_WRITE_SIZE));
}
int
closed_socket(Socket sc, char* msg)
{
if (sc->closed) {
error("%c : Socket<%p>",msg);
return 1;
}
return 0;
}
str
socket_peer(Socket sc)
{
return ipaddress(sc->peer,sc->port);
}
void
socket_notice(Socket sc, char* msg)
{
notice("Socket <%p> %s %c\n", sc, socket_peer(sc), msg);
}
void
socket_attach(Socket sc, IPAddress peer, int port)
{
sc->peer = peer;
sc->port = port;
}
size_t
socket_send(Socket sc, str msg)
{
attachTo(sc->peer,sc->port);
return sendto(sc->fd,msg->data,msg->length,0,(struct sockaddr *)&Address,sizeof(Address));
}
str
socket_recv(Socket sc)
{
attachTo(sc->peer,sc->port);
Address_len = sizeof(Address);
size_t msg_size;
recvfrom(sc->fd,&msg_size,sizeof(size_t),0, (struct sockaddr*)&Address, (socklen_t *)&Address_len);
str retval = blank(msg_size);
retval->length = recvfrom(sc->fd, retval->data, retval->length, 0, (struct sockaddr *)&Address, (socklen_t *)&Address_len);
return retval;
}