static int
send_list_udp(struct socket_server *ss, struct socket *s, struct wb_list *list, struct socket_message *result) {
while (list->head) {
struct write_buffer * tmp = list->head;
union sockaddr_all sa;
socklen_t sasz = udp_socket_address(s, tmp->udp_address, &sa);
int err = sendto(s->fd, tmp->ptr, tmp->sz, 0, &sa.s, sasz);
if (err < 0) {
switch(errno) {
case EINTR:
case AGAIN_WOULDBLOCK:
return -1;
}
fprintf(stderr, "socket-server : udp (%d) sendto error %s.\n",s->id, strerror(errno));
return -1;
/* // ignore udp sendto error
result->opaque = s->opaque;
result->id = s->id;
result->ud = 0;
result->data = NULL;
return SOCKET_ERROR;
*/
}
s->wb_size -= tmp->sz;
list->head = tmp->next;
write_buffer_free(ss,tmp);
}
list->tail = NULL;
return -1;
}
static int
send_list_tcp(struct socket_server *ss, struct socket *s, struct wb_list *list, struct socket_message *result) {
while (list->head) {
struct write_buffer * tmp = list->head;
for (;;) {
int sz = write(s->fd, tmp->ptr, tmp->sz);
if (sz < 0) {
switch(errno) {
case EINTR:
continue;
case EAGAIN:
return -1;
}
force_close(ss,s, result);
return SOCKET_CLOSE;
}
s->wb_size -= sz;
if (sz != tmp->sz) {
tmp->ptr += sz;
tmp->sz -= sz;
return -1;
}
break;
}
list->head = tmp->next;
write_buffer_free(ss,tmp);
}
list->tail = NULL;
return -1;
}
// 清空写缓冲区，并释放内存空间
static void
free_wb_list(struct socket_server *ss, struct wb_list *list) {
struct write_buffer *wb = list->head;
while (wb) {
struct write_buffer *tmp = wb;
wb = wb->next;
write_buffer_free(ss, tmp);
}
list->head = NULL;
list->tail = NULL;
}
// 发送tcp数据
// 正常返回 -1
// 失败返回 SOCKET_CLOSE
static int
send_list_tcp(struct socket_server *ss, struct socket *s, struct wb_list *list, struct socket_message *result) {
while (list->head) {
struct write_buffer * tmp = list->head;
for (;;) {
// 往套接字写入数据
int sz = write(s->fd, tmp->ptr, tmp->sz);
if (sz < 0) {
switch(errno) {
case EINTR:
// 信用中断，循环等待
continue;
case AGAIN_WOULDBLOCK:
// 写缓冲区满，直接返回
return -1;
}
// 关闭socket
force_close(ss,s, result);
return SOCKET_CLOSE;
}
s->wb_size -= sz;
if (sz != tmp->sz) {
// 如果缓冲区数据没有发送完，直接返回-1
// tmp缓冲区仍然在缓冲区链表中，等待下一次发送
tmp->ptr += sz;
tmp->sz -= sz;
return -1;
}
break;
}
// head指针偏移到tmp下一个缓冲区
list->head = tmp->next;
// 释放tmp缓冲区
write_buffer_free(ss,tmp);
}
list->tail = NULL;
return -1;
}