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talk_thread.c
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talk_thread.c
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#include "talk_thread.h"
void *talk_thread(void *arg)
{
pthread_detach(pthread_self());
pthread_t friend_thread_id = pthread_self();
//socket_fd ==> address ==> friend_name enqueue_connector
//get socket_fd
socket_fd talk_socket_fd = ((struct talk_thread_arg *)arg)->connect_socket_fd;
//int state = TALK_RUNNING;
int connect_launcher = ((struct talk_thread_arg *)arg)->connect_launcher;
int connect_type;
int file_trans_fd = (int)((struct talk_thread_arg *)arg)->file_trans_fd;
//can create a new function get_friend_address(socket_fd talk_socket_fd, char *ip)
struct sockaddr addr;
socklen_t addr_len = sizeof(struct sockaddr);
getpeername(talk_socket_fd, (struct sockaddr *)&addr, &addr_len);
//get address
char ip[16] = {0};
strcpy(ip, inet_ntoa(((struct sockaddr_in *)&addr)->sin_addr));
char *friend_name = (char *)malloc_string_safe(friend_name, get_friend_name_length(&name_address, ip) * sizeof(char));
get_friend_name(&name_address, ip, friend_name);
//get friend_name
//init data recv
Queue *data_recv = init_split_data_recv();
if (talk_socket_fd == 0)
goto end;
//set connect type
if (connect_launcher == FALSE) {//for receiver recv connect type, set type, send ACK
//recv head control data_length
if (recv_unwrap_split_data(talk_socket_fd, data_recv, NULL) == FALSE) goto end;
char *head_control_data = init_data_recombine(data_recv);
recombine_data(data_recv, head_control_data);
connect_type = atoi(head_control_data);
destroy_data_recombine(head_control_data);
send(talk_socket_fd, ACK_STR, strlen(ACK_STR), 0);
}else{//for launcher get and set connect type, send type, recv ACK(no need to check is data equal ACK)
connect_type = ((struct talk_thread_arg *)arg)->connect_type;
char *send_control_str;
if (connect_type == MESSAGE_CONNECT)
send_control_str = MESSAGE_CONNECT_STR;
if (connect_type == FILE_CONNECT)
send_control_str = FILE_CONNECT_STR;
//send head control data
send_wrap_split_data(talk_socket_fd, send_control_str, ETB);
//recv head control ACK
if (recv_equal_char(talk_socket_fd, ACK) == FALSE) goto end;
}
//enqueue_connector
enqueue_connector(&connectors, friend_name, friend_thread_id, talk_socket_fd, connect_type);
//init and set arg by type
//runs service
//destroy
struct connect_info *cinfo;
if (connect_type == MESSAGE_CONNECT) {
cinfo = init_message(talk_socket_fd, friend_name, data_recv);
show_message(cinfo);
destroy_message(cinfo);
}else if (connect_type == FILE_CONNECT) {
cinfo = init_download(talk_socket_fd, friend_name, data_recv, file_trans_fd);
download_file(cinfo);
destroy_download(cinfo);
}else{
goto end;
}
end:
free_safe(arg);
destroy_split_data_recv(data_recv);
if (!find_connector_by_threadid(&connectors, friend_thread_id, NULL)) {
remove_connector(&connectors, talk_socket_fd);
}
close_connector(talk_socket_fd);
free_safe(friend_name);
pthread_exit((void *)NULL);
}
struct connect_info *init_message(socket_fd talk_socket_fd, char *friend_name, Queue *data_recv)
{
struct connect_info *cinfo = (struct connect_info*)malloc_safe(cinfo, sizeof(struct connect_info));
cinfo->data_recv = data_recv;
cinfo->connect_socket_fd = talk_socket_fd;
cinfo->friend_name = friend_name;
return cinfo;
}
void show_message(struct connect_info *cinfo)
{
while (!client_shutdown) {
if (recv_unwrap_split_data(cinfo->connect_socket_fd, cinfo->data_recv, NULL) == FALSE) break;
char *message = init_data_recombine(cinfo->data_recv);
recombine_data(cinfo->data_recv, message);
show(cinfo->friend_name, message, SHOW_DIRECTION_IN);
destroy_data_recombine(message);
usleep(500);
}
}
void destroy_message(struct connect_info *cinfo)
{
free_safe(cinfo);
}
struct connect_info *init_download(socket_fd talk_socket_fd, char *friend_name, Queue *data_recv, int file_trans_fd)
{
struct connect_info *cinfo = (struct connect_info*)malloc_safe(cinfo, sizeof(struct connect_info));
struct file_trans *task;
if (file_trans_fd == ERROR) {//Accepter recv file_name init
if (recv_unwrap_split_data(talk_socket_fd, data_recv, NULL) == FALSE) return NULL;
char *file_name = init_data_recombine(data_recv);
recombine_data(data_recv, file_name);
send(talk_socket_fd, ACK_STR, strlen(ACK_STR), 0);
if (recv_unwrap_split_data(talk_socket_fd, data_recv, NULL) == FALSE) return NULL;
char *total_size_str = init_data_recombine(data_recv);
recombine_data(data_recv, total_size_str);
send(talk_socket_fd, ACK_STR, strlen(ACK_STR), 0);
long total_size = atol(total_size_str);
file_trans_fd = init_file_trans(file_trans_control, FALSE, file_name, NULL, total_size);
task = find_file_trans_task(file_trans_control, file_trans_fd);
char *size_info = (char *)malloc_string_safe(size_info, strlen(SIZE_INFO_HEAD) + strlen(total_size_str) + strlen(SIZE_INFO_TAIL));
sprintf(size_info, "%s%s%s", SIZE_INFO_HEAD, total_size_str, SIZE_INFO_TAIL);
show(task->file_name, size_info, SHOW_DIRECTION_SYSTEM_INFO);
destroy_data_recombine(file_name);
destroy_data_recombine(total_size_str);
free(size_info);
/* destroy_data_recombine(md5);*/
}else{//Launcher send file_name
task = find_file_trans_task(file_trans_control, file_trans_fd);
send_wrap_split_data(talk_socket_fd, task->file_name, ETB);
//recv head control ACK
if (recv_equal_char(talk_socket_fd, ACK) == FALSE) return NULL;
//send total_size_str
char *send_total_size_str = long_to_string(task->total_size);
char *size_info = (char *)malloc_string_safe(size_info, strlen(SIZE_INFO_HEAD) + strlen(send_total_size_str) + strlen(SIZE_INFO_TAIL));
sprintf(size_info, "%s%s%s", SIZE_INFO_HEAD, send_total_size_str, SIZE_INFO_TAIL);
show(task->file_name, size_info, SHOW_DIRECTION_SYSTEM_INFO);
free(size_info);
send_wrap_split_data(talk_socket_fd, send_total_size_str, ETB);
//recv head control ACK
if (recv_equal_char(talk_socket_fd, ACK) == FALSE) return NULL;
free_safe(send_total_size_str);
}
cinfo->friend_name = friend_name;
cinfo->data_recv = data_recv;
cinfo->connect_socket_fd = talk_socket_fd;
cinfo->file_trans_fd = file_trans_fd;
return cinfo;
}
void download_file(struct connect_info *cinfo)
{
struct file_trans *task = find_file_trans_task(file_trans_control, cinfo->file_trans_fd);
int result;
unsigned char ch[1];
if(task->connect_launcher == TRUE){//Launcher read send
show(task->file_name, "send begin", SHOW_DIRECTION_SYSTEM_INFO);
while (task->fin_size < task->total_size && !client_shutdown){
fread(ch, sizeof(unsigned char), 1, task->file_ptr);
result = send(cinfo->connect_socket_fd, ch, 1, 0);
if (result == -1) break;
task->fin_size += 1;
}
if (task->fin_size == task->total_size) {
show(task->file_name, "send finished", SHOW_DIRECTION_SYSTEM_INFO);
}
}else{//Accepter recv append
show(task->file_name, "download begin", SHOW_DIRECTION_SYSTEM_INFO);
while (task->fin_size < task->total_size && !client_shutdown){
result = recv(cinfo->connect_socket_fd, ch, 1, 0);
if (result < 0 && !(errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN)) break;
task->fin_size += 1;
fwrite(ch, sizeof(unsigned char), 1, task->file_ptr);
}
if (task->fin_size == task->total_size) {
show(task->file_name, "download finished", SHOW_DIRECTION_SYSTEM_INFO);
}
}
}
void destroy_download(struct connect_info *cinfo)
{
destroy_file_trans(file_trans_control, cinfo->file_trans_fd);
free_safe(cinfo);
}
Queue *init_split_data_recv()
{
Queue *data_recv = (Queue *)malloc_safe(data_recv, sizeof(Queue));
InitQueue(data_recv, sizeof(char *));
return data_recv;
}
int recv_equal_char(socket_fd recv_socket_fd,char ch)
{
char chstr[2] = {ch, 0};
Queue *data_split = init_split_data_recv();
int result = recv_unwrap_split_data(recv_socket_fd, data_split, NULL);
if (result == TRUE) {
char *data = init_data_recombine(data_split);
recombine_data(data_split, data);
result = strcmp(data, chstr) == TRUE?TRUE:FALSE;
destroy_data_recombine(data);
}
destroy_split_data_recv(data_split);
return result;
}
int recv_unwrap_split_data(socket_fd recv_socket_fd, Queue *data_recv, char *tail)
{
int recv_result;
int recv_end = 0;
do {
char *recvbuf = (char *)malloc_string_safe(recvbuf, RECV_BUFSIZE * sizeof(char));
recv_result = recv(recv_socket_fd, recvbuf, RECV_BUFSIZE - 1, 0);
if (!compare_wrap(recvbuf, ETB)) {
recv_end = 1;
un_wrap(recvbuf, tail);
}
EnQueue(data_recv, &recvbuf);
if (recv_result <= 0 && !(errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN))
return FALSE;
} while (!recv_end &&( recv_result > 0 || (recv_result < 0 && (errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN))));
return TRUE;
}
void destroy_split_data_recv(Queue *data_recv)
{
while (QueueLength(data_recv)) {//prevent malloc without free
char *recvbuf;
DeQueue(data_recv, &recvbuf);
free_safe(recvbuf);
}
DestroyQueue(data_recv);
free_safe(data_recv);
}
char *init_data_recombine(Queue *data_recv)
{
int queue_length_max = QueueLength(data_recv);
char *data = (char *)malloc_string_safe(data, RECV_BUFSIZE * sizeof(char) * (queue_length_max + 1));
return data;
}
void recombine_data(LinkQueue *data_recv,char *data)
{
int queue_length_max = QueueLength(data_recv);
int queue_length = queue_length_max;
int data_length = 0;
while (queue_length > 0) {
char *recvbuf;
DeQueue(data_recv, &recvbuf);
if (data != NULL){
memcpy(data + data_length, recvbuf, strlen(recvbuf));
data_length += strlen(recvbuf);
}
free_safe(recvbuf);
queue_length = QueueLength(data_recv);
} //recombine all data to message
}
void destroy_data_recombine(char *data)
{
free_safe(data);
}