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#include <ctype.h>
#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"
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)
) < 2) {
return false;
}
len = ntohs(len);
uint8_t buffer[len];
if (read_tcp_stream(
&connection->sock.tcp,
buffer,
len
) < len) {
return false;
}
read_to_packet(buffer, len, packet);
return true;
}
static 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) {
uint16_t net_len = htons(len);
if (write_tcp_stream(
&connection->sock.tcp,
&net_len,
sizeof(uint16_t)
) < 0) {
return false;
}
if (write_tcp_stream(
&connection->sock.tcp,
buf,
len
) < 0) {
return false;
}
return true;
}
static 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) {
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) {
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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