static
void
set_get(NDB_SOCKET_TYPE fd, int level, int optval, const char *optname,
int val)
{
int actual = 0, defval = 0;
SOCKET_SIZE_TYPE len = sizeof(actual);
my_getsockopt(fd, level, optval, (char*)&defval, &len);
if (my_setsockopt(fd, level, optval,
(char*)&val, sizeof(val)) < 0)
{
#ifdef DEBUG_TRANSPORTER
g_eventLogger->error("setsockopt(%s, %d) errno: %d %s",
optname, val, errno, strerror(errno));
#endif
}
len = sizeof(actual);
if ((my_getsockopt(fd, level, optval,
(char*)&actual, &len) == 0) &&
actual != val)
{
#ifdef DEBUG_TRANSPORTER
g_eventLogger->error("setsockopt(%s, %d) - actual %d default: %d",
optname, val, actual, defval);
#endif
}
}
void dg_cli(FILE *fp, int sockfd, const SA *pservaddr, socklen_t servlen)
{
int n = 0;
const int on = 1;
char sendline[MAXLINE] = {0};
char recvline[MAXLINE + 1] = {0};
sigset_t sigset_alrm;
socklen_t len ;
struct sockaddr *preply_addr;
preply_addr = my_malloc(servlen); //???为什么要这个?
my_setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on));
my_signal(SIGALRM, recvfrom_alarm);
my_sigemptyset(&sigset_alrm);
my_sigaddset(&sigset_alrm, SIGALRM);
while (my_fgets(sendline, MAXLINE, fp) != NULL)
{
my_sendto(sockfd, sendline, strlen(sendline),
0, pservaddr, servlen);
alarm(5);
while(1)
{
len = servlen;
// DEBUG;
// printf("recvfrom 前面!\n");
my_sigprocmask(SIG_UNBLOCK, &sigset_alrm, NULL);
n = recvfrom(sockfd, recvline, MAXLINE,
0, preply_addr, &len);
my_sigprocmask(SIG_BLOCK, &sigset_alrm, NULL);
if (n < 0)
{
if (errno == EINTR)
{
break;
}
else
{
err_sys("recvfrom error");
}
}
else
{
recvline[n] = 0;
sleep(1);
printf("from %s: %s",
my_sock_ntop_host(preply_addr, len),
recvline);
}
}//while
}//while
free(preply_addr);
}
//p258
//执行服务器的通常步骤
int
tcp_listen(const char *host, const char *serv, socklen_t *addrlenp)
{
int listenfd = 0;
int n = 0;
const int on = 1;
struct addrinfo hints;
struct addrinfo *res = NULL;
struct addrinfo *ressave = NULL;
bzero(&hints, sizeof(struct addrinfo));
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
printf("listen中!!!");
//if n != 0, 表示error
if ( (n = getaddrinfo(host, serv, &hints, &res)) != 0 )
{
err_quit("tcp_listen error for %s, %s: %s",
host, serv, gai_strerror(n));
}
ressave = res; //保存res
do
{
//系统调用
listenfd = socket(res->ai_family,
res->ai_socktype,
res->ai_protocol);
if (listenfd < 0)
{
continue; //error, try next one
}
my_setsockopt(listenfd, SOL_SOCKET,
SO_REUSEADDR,
&on, sizeof(on));
//系统调用
if (bind(listenfd, res->ai_addr, res->ai_addrlen) == 0)
{
break; //success!
}
my_close(listenfd);
} while( (res = res->ai_next) != NULL );
if (res == NULL)
{
err_sys("tcp_listen error for %s, %s", host, serv);
}
my_listen(listenfd, LISTENQ);
if (addrlenp) //addrlenp是一个指针
{
//return size of protocal address(值结果参数)
*addrlenp = res->ai_addrlen;
}
//printf("")
struct sockaddr test ;
printf("ai_addr = %s\n", my_inet_ntop(AF_INET, (const char *)ressave->ai_addr, (char*)&test, sizeof(test)));
freeaddrinfo(ressave);
return (listenfd);
}
void dg_cli(FILE *fp, int sockfd, const SA *pservaddr, socklen_t servlen)
{
int n = 0;
int maxfdp1 = 0;
const int on = 1;
char sendline[MAXLINE] = {0};
char recvline[MAXLINE] = {0};
fd_set rset;
socklen_t len;
struct sockaddr *preply_addr = NULL;
preply_addr = my_malloc(servlen);
my_setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on));
my_pipe(pipefd);
// printf("pipefd[0] = %d\n", pipefd[0]); //+
maxfdp1 = max(sockfd, pipefd[0]) + 1;
FD_ZERO(&rset);
my_signal(SIGALRM, recvfrom_alarm);
while (my_fgets(sendline, MAXLINE, fp) != NULL )
{
my_sendto(sockfd, sendline, strlen(sendline),
0, pservaddr, servlen);
alarm(3);
while (1)
{
FD_SET(sockfd, &rset);
FD_SET(pipefd[0], &rset);
if ( (n = select(maxfdp1, &rset, NULL, NULL, NULL)) < 0 )
{
if (errno == EINTR)
{
DEBUG;
printf("select errno = EINTR\n"); //+
continue;
}
else
{
err_sys("select error");
}
}
// printf("kankan!\n");
if ( FD_ISSET(sockfd, &rset) )
{
len = servlen;
n = my_recvfrom(sockfd, recvline, MAXLINE,
0, preply_addr, &len);
recvline[n] = 0;
printf("from %s: %s",
my_sock_ntop(preply_addr, len),
recvline);
}
if ( FD_ISSET(pipefd[0], &rset) )
{
// printf("read 上面\n");
my_read(pipefd[0], &n, 1); //timer expired
// printf("read 下面!\n");
break;
}
}
}
free(preply_addr);
}
