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#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "addr.h"
#include "binding.h"
#include "../io/log.h"
static void create_udp_binding(UdpSocket* socket, uint16_t port) {
if (create_udp_socket(V6, socket) < 0) {
ERROR("Failed to create UDP socket: %s", strerror(errno));
exit(EXIT_FAILURE);
}
IpAddr addr;
ip_addr_any6(&addr);
SocketAddr socketaddr;
create_socket_addr(port, addr, &socketaddr);
if (bind_udp_socket(&socketaddr, socket) < 0) {
ERROR("Failed to bind UDP socket on port %hu: %s", port, strerror(errno));
exit(EXIT_FAILURE);
}
}
static void create_tcp_binding(TcpSocket* socket, uint16_t port) {
if (create_tcp_socket(V6, socket) < 0) {
ERROR("Failed to create TCP socket: %s", strerror(errno));
exit(EXIT_FAILURE);
}
IpAddr addr;
ip_addr_any6(&addr);
SocketAddr socketaddr;
create_socket_addr(port, addr, &socketaddr);
if (bind_tcp_socket(&socketaddr, socket) < 0) {
ERROR("Failed to bind TCP socket on port %hu: %s", port, strerror(errno));
exit(EXIT_FAILURE);
}
if (listen_tcp_socket(socket, 5) < 0) {
ERROR("Failed to listen on TCP socket: %s", strerror(errno));
exit(EXIT_FAILURE);
}
}
void create_binding(BindingType type, uint16_t port, Binding* binding) {
binding->type = type;
if (type == UDP) {
create_udp_binding(&binding->sock.udp, port);
} else if(type == TCP) {
create_tcp_binding(&binding->sock.tcp, port);
} else {
exit(EXIT_FAILURE);
}
}
void free_binding(Binding* binding) {
if (binding->type == UDP) {
close_udp_socket(&binding->sock.udp);
} else if(binding->type == TCP) {
close_tcp_socket(&binding->sock.tcp);
}
}
bool accept_connection(Binding* binding, Connection* connection) {
connection->type = binding->type;
if(binding->type == UDP) {
connection->sock.udp.udp = binding->sock.udp;
memset(&connection->sock.udp.clientaddr, 0, sizeof(SocketAddr));
return true;
}
if (accept_tcp_socket(&binding->sock.tcp, &connection->sock.tcp) < 0) {
ERROR("Failed to accept TCP connection: %s", strerror(errno));
return false;
}
return true;
}
static void read_to_packet(uint8_t* buf, uint16_t len, Packet* packet) {
PacketBuffer* pkbuffer = buffer_create(len);
for (int i = 0; i < len; i++) {
buffer_write(pkbuffer, buf[i]);
}
buffer_seek(pkbuffer, 0);
read_packet(pkbuffer, packet);
buffer_free(pkbuffer);
}
static bool read_udp(Connection* connection, Packet* packet) {
uint8_t buffer[512];
int32_t n = read_udp_socket(
&connection->sock.udp.udp,
buffer,
512,
&connection->sock.udp.clientaddr
);
if (n < 0) {
return false;
}
read_to_packet(buffer, n, packet);
return true;
}
static bool read_tcp(Connection* connection, Packet* packet) {
uint16_t len;
if ( read_tcp_stream(
&connection->sock.tcp,
&len,
sizeof(uint16_t)
) < 0) {
return false;
}
uint8_t buffer[len];
if ( read_tcp_stream(
&connection->sock.tcp,
buffer,
len
) < 0) {
return false;
}
read_to_packet(buffer, len, packet);
return true;
}
bool read_connection(Connection* connection, Packet* packet) {
if (connection->type == UDP) {
return read_udp(connection, packet);
} else if (connection->type == TCP) {
return read_tcp(connection, packet);
}
return false;
}
static bool write_udp(Connection* connection, uint8_t* buf, uint16_t len) {
//if (len > 512) {
buf[2] = buf[2] | 0x03;
// len = 512;
// }
return write_udp_socket(
&connection->sock.udp.udp,
buf,
len,
&connection->sock.udp.clientaddr
) == len;
}
static bool write_tcp(Connection* connection, uint8_t* buf, uint16_t len) {
len = htons(len);
if (write_tcp_stream(
&connection->sock.tcp,
&len,
sizeof(uint16_t)
) < 0) {
return false;
}
if (write_tcp_stream(
&connection->sock.tcp,
buf,
len
) < 0) {
return false;
}
return true;
}
bool write_connection(Connection* connection, Packet* packet) {
PacketBuffer* pkbuffer = buffer_create(64);
write_packet(pkbuffer, packet);
uint16_t len = buffer_get_size(pkbuffer);
uint8_t* buffer = buffer_get_ptr(pkbuffer);
bool success = false;
if(connection->type == UDP) {
success = write_udp(connection, buffer, len);
} else if(connection->type == TCP) {
success = write_tcp(connection, buffer, len);
};
buffer_free(pkbuffer);
return success;
}
void free_connection(Connection* connection) {
if (connection->type == TCP) {
close_tcp_stream(&connection->sock.tcp);
}
}
static bool create_udp_request(SocketAddr* addr, Connection* request) {
if ( create_udp_socket(addr->type, &request->sock.udp.udp) < 0) {
ERROR("Failed to connect to UDP socket: %s", strerror(errno));
return false;
}
request->sock.udp.clientaddr = *addr;
return true;
}
static bool create_tcp_request(SocketAddr* addr, Connection* request) {
if( connect_tcp_stream(addr, &request->sock.tcp) < 0) {
ERROR("Failed to connect to TCP socket: %s", strerror(errno));
return false;
}
return true;
}
bool create_request(BindingType type, SocketAddr* addr, Connection* request) {
request->type = type;
if (type == UDP) {
return create_udp_request(addr, request);
} else if (type == TCP) {
return create_tcp_request(addr, request);
} else {
return true;
}
}
bool request_packet(Connection* request, Packet* in, Packet* out) {
if (!write_connection(request, in)) {
return false;
}
if (!read_connection(request, out)) {
return false;
}
return true;
}
void free_request(Connection* connection) {
if (connection->type == UDP) {
close_udp_socket(&connection->sock.udp.udp);
} else if (connection->type == TCP) {
close_tcp_stream(&connection->sock.tcp);
}
}
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