static void
core_close(struct context *ctx, struct conn *conn)
{
rstatus_t status;
char type, *addrstr;
ASSERT(conn->sd > 0);
if (conn->client) {
type = 'c';
addrstr = nc_unresolve_peer_desc(conn->sd);
} else {
type = conn->proxy ? 'p' : 's';
addrstr = nc_unresolve_addr(conn->addr, conn->addrlen);
}
log_debug(LOG_NOTICE, "close %c %d '%s' on event %04"PRIX32" eof %d done "
"%d rb %zu sb %zu%c %s", type, conn->sd, addrstr, conn->events,
conn->eof, conn->done, conn->recv_bytes, conn->send_bytes,
conn->err ? ':' : ' ', conn->err ? strerror(conn->err) : "");
status = event_del_conn(ctx->ep, conn);
if (status < 0) {
log_warn("event del conn e %d %c %d failed, ignored: %s", ctx->ep,
type, conn->sd, strerror(errno));
}
conn->close(ctx, conn);
}
/*
* Unresolve the socket descriptor address by translating it to a
* character string describing the host and service
*
* This routine is not reentrant
*/
char *
nc_unresolve_desc(int sd)
{
struct sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
int status;
status = getsockname(sd, (struct sockaddr *)&addr, &addrlen);
if (status < 0) {
return "unknown";
}
return nc_unresolve_addr((struct sockaddr *)&addr, addrlen);
}
/*
* Unresolve the socket descriptor address by translating it to a
* character string describing the host and service
*
* This routine is not reentrant
*/
char *
nc_unresolve_desc(int sd)
{
static struct sockinfo si;
struct sockaddr *addr;
socklen_t addrlen;
int status;
memset(&si, 0, sizeof(si));
addr = (struct sockaddr *)&si.addr;
addrlen = sizeof(si.addr);
status = getsockname(sd, addr, &addrlen);
if (status < 0) {
return "unknown";
}
return nc_unresolve_addr(addr, addrlen);
}
/*
* Unresolve the socket descriptor peer address by translating it to a
* character string describing the host and service
* client使用
* This routine is not reentrant
*/
char *
nc_unresolve_peer_desc(int sd)
{
static struct sockinfo si;
struct sockaddr *addr;
socklen_t addrlen;
int status;
memset(&si, 0, sizeof(si));
addr = (struct sockaddr *)&si.addr;
addrlen = sizeof(si.addr);
/**
*getpeername函数用于获取与某个套接字关联的外地协议地址
* getpeername()函数用于从端口s中获取与它捆绑的端口名，
* 并把它存放在sockaddr类型的name结构中。它适用于数据报或流类套接口。
* */
status = getpeername(sd, addr, &addrlen);
if (status < 0) {
return "unknown";
}
//获取地址
return nc_unresolve_addr(addr, addrlen);
}