int main(int argc,char *argv[])
{
int sockfd;
const int on = 1;
pid_t pid;
struct sockaddr_in *sa,cliaddr,wildaddr;
struct ifi_info *ifi,*ifihead;
for(ifi = ifihead = get_ifi_info(AF_INET,1);ifi != NULL;
ifi=ifi->ifi_next){
sa = (struct sockaddr_in*)ifi->ifi_addr;
sa->sin_port = htons(SERV_PORT);
sa->sin_family = AF_INET;
sockfd = Socket(AF_INET,SOCK_DGRAM,0);
setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&on,sizeof(on));
Bind(sockfd,(SA*)sa,sizeof(*sa));
if((pid = fork()) == 0){
mydg_echo(sockfd,*cliaddr,sizeof(cliaddr),(SA*)sa);
exit(0);
}
if(ifi->ifi_flags & IFF_BROADCAST){
sockfd = Socket(AF_INET,SOCK_DAGRAM,0);
setsockopt(sockfd,SOL_SOCKET,SOCK_DGRAM,&on,sizeof(on));
sa = (struct sockaddr_in *)ifi->ifi_brdaddr;
sa ->sin_port = htons(SERV_PORT);
sa->sin_family = AF_INET;
if(Bind(sockfd,sa,sizeof(*sa)) < 0){
if(errno == EINUSEADDR){
err_quit("EINUSERADDR:for %s\n",Sock_ntop(sa,sizeof(*sa));
}else{
err_quit("error bind for %s\n",Sock_ntop(sa,sizeof(*sa)));
}
}
int
main(int argc, char **argv)
{
struct ifi_info *ifi, *ifihead;
struct sockaddr *sa;
u_char *ptr;
int i, family, doaliases;
if (argc != 3)
err_quit("usage: prifinfo <inet4|inet6> <doaliases>");
if (strcmp(argv[1], "inet4") == 0)
family = AF_INET;
#ifdef AF_INET6
else if (strcmp(argv[1], "inet6") == 0)
family = AF_INET6;
#endif
else
err_quit("invalid <address-family>");
doaliases = atoi(argv[2]);
for (ifihead = ifi = Get_ifi_info(family, doaliases);
ifi != NULL; ifi = ifi->ifi_next) {
printf("%s: <", ifi->ifi_name);
if (ifi->ifi_flags & IFF_UP) printf("UP ");
if (ifi->ifi_flags & IFF_BROADCAST) printf("BCAST ");
if (ifi->ifi_flags & IFF_MULTICAST) printf("MCAST ");
if (ifi->ifi_flags & IFF_LOOPBACK) printf("LOOP ");
if (ifi->ifi_flags & IFF_POINTOPOINT) printf("P2P ");
printf(">\n");
if ( (i = ifi->ifi_hlen) > 0) {
ptr = ifi->ifi_haddr;
do {
printf("%s%x", (i == ifi->ifi_hlen) ? " " : ":", *ptr++);
} while (--i > 0);
printf("\n");
}
if ( (sa = ifi->ifi_addr) != NULL)
printf(" IP addr: %s\n", Sock_ntop(sa, sa->sa_len));
if ( (sa = ifi->ifi_brdaddr) != NULL)
printf(" broadcast addr: %s\n", Sock_ntop(sa, sa->sa_len));
if ( (sa = ifi->ifi_dstaddr) != NULL)
printf(" destination addr: %s\n", Sock_ntop(sa, sa->sa_len));
}
free_ifi_info(ifihead);
exit(0);
}
int main(int argc,char *argv[])
{
int listenfd,connfd;
socklen_t addrlen,len;
struct sockaddr *cliaddr;
char buffer[MAXLINE];
time_t ticks;
if(argc == 2)
listenfd = tcp_listen(NULL,argv[1],&addrlen);
if(argc == 3)
listenfd = tcp_listen(argv[1],argv[2],&addrlen);
else
err_quit("usage:daytimetcpsrv2:[<host>] <service or port>]");
cliaddr = malloc(addrlen);
for (;;) {
len = addrlen;
connfd = accpet(listenfd,cliaddr,&len);
printf("connection from %s\n",Sock_ntop(cliaddr,len));
ticks = time(NULL);
snprintf(buffer,sizeof(buffer),"%.24s\r\n",ctime(&ticks));
Writen(connfd,buffer,strlen(buffer));
Close(connfd);
}
}
int main(int argc, char **argv) {
int listenfd;
int connfd;
socklen_t len;
char buff[MAXLINE];
time_t ticks;
struct sockaddr_storage cliaddr;
if (argc != 2)
err_quit("usage: daytimetcpsrv1 <service or port#>");
listenfd = Tcp_listen(NULL, argv[1], NULL);
for ( ; ; ) {
len = sizeof(cliaddr);
connfd = Accept(listenfd, (SA *)&cliaddr, &len);
printf("connectoin from %s\n", Sock_ntop((SA *)&cliaddr, len));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
Write(connfd, buff, strlen(buff));
Close(connfd);
}
}
int
main(int argc, char **argv)
{
int sockfd;
socklen_t len;
struct sockaddr_in cliaddr, servaddr;
if (argc != 2)
err_quit("usage: udpcli <IPaddress>");
sockfd = Socket(AF_INET, SOCK_DGRAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(SERV_PORT);
Inet_pton(AF_INET, argv[1], &servaddr.sin_addr);
Connect(sockfd, (SA *) &servaddr, sizeof(servaddr));
len = sizeof(cliaddr);
Getsockname(sockfd, (SA *) &cliaddr, &len);
printf("local address %s\n", Sock_ntop((SA *) &cliaddr, len));
exit(0);
}
int main(int argc, char **argv) {
int sockfd;
ssize_t n;
char buff[MAXLINE];
time_t ticks;
socklen_t len;
struct sockaddr_storage cliaddr;
if (argc == 2)
sockfd = Udp_server(NULL, argv[1], NULL);
else if (argc == 3)
sockfd = Udp_server(argv[1], argv[2], NULL);
else
err_quit("usage: daytimeupdsrv [ host ] <service or port>");
for ( ; ; ) {
len = sizeof(cliaddr);
n = Recvfrom(sockfd, buff, MAXLINE, 0, (SA *)&cliaddr, &len);
printf("datagram from %s\n", Sock_ntop((SA *)&cliaddr, len));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
Sendto(sockfd, buff, strlen(buff), 0, (SA *)&cliaddr, len);
}
}
int main(int argc, char** argv)
{
if(argc != 3)
{
fprintf(stderr,
"usage: daytimeserv <host> <service>\n");
exit(-1);
}
struct sockaddr_storage cliaddr;
int listenfd = tcp_listen(argv[1], argv[2],NULL);
socklen_t len;
int connfd ;
time_t ticks;
char buff[MAXLINE];
for(; ; )
{
len = sizeof(cliaddr);
connfd = Accept(listenfd, (SA*) &cliaddr,&len);
printf("connection from %s\n",
Sock_ntop((SA*)&cliaddr, len));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
Write(connfd, buff, strlen(buff));
Close(connfd);
}
}
void dg_cli(FILE *fp, int sockfd, const SA *pservaddr, socklen_t servlen)
{
int icmpfd, maxfdp1;
char sendline[MAXLINE], recvline[MAXLINE + 1];
fd_set rset;
ssize_t n;
struct timeval tv;
struct icmpd_err icmpd_err;
struct sockaddr_un sun;
Sock_bind_wild(sockfd, pservaddr->sa_family);
icmpfd = Socket(AF_LOCAL, SOCK_STREAM, 0);
sun.sun_family = AF_LOCAL;
strcpy(sun.sun_path, ICMPD_PATH);
Connect(icmpfd, (SA *)&sun, sizeof(sun));
Write_fd(icmpfd, "1", 1, sockfd);
n = Read(icmpfd, recvline, 1);
if (n != 1 || recvline[0] != '1')
err_quit("error creating icmp socket, n = %d, char = %c",
n, recvline[0]);
FD_ZERO(&rset);
maxfdp1 = max(sockfd, icmpfd) + 1;
while (Fgets(sendline, MAXLINE, fp) != NULL) {
Sendto(sockfd, sendline, strlen(sendline), 0,
pservaddr, servlen);
tv.tv_sec = 5;
tv.tv_usec = 0;
FD_SET(sockfd, &rset);
FD_SET(icmpfd, &rset);
if ((n = Select(maxfdp1, &rset, NULL, NULL, &tv)) == 0) {
fprintf(stderr, "socket timeout\n");
continue;
}
if (FD_ISSET(sockfd, &rset)) {
n = Recvfrom(sockfd, recvline, MAXLINE, 0,
NULL, NULL);
recvline[n] = 0;
Fputs(recvline, stdout);
}
if (FD_ISSET(icmpfd, &rset)) {
if ((n = Read(icmpfd, &icmpd_err,
sizeof(icmpd_err))) == 0)
err_quit("ICMP daemon terminate");
else if (n != sizeof(icmpd_err))
err_quit("n = %d, expected %d",
n, sizeof(icmpd_err));
printf("ICMP error: dest = %s, %s, type = %d,"
" code = %d\n",
Sock_ntop((SA *)&icmpd_err.icmpd_dest,
icmpd_err.icmpd_len),
strerror(icmpd_err.icmpd_errno),
icmpd_err.icmpd_type,
icmpd_err.icmpd_code);
}
}
}
int main(int argc, char **argv)
{
int sockfd;
struct ifi_info *ifi;
unsigned char *ptr;
struct arpreq arpreq;
struct sockaddr_in *sin;
sockfd = Socket(AF_INET, SOCK_DGRAM, 0);
for (ifi = get_ifi_info(AF_INET, 0); ifi != NULL; ifi = ifi->ifi_next)
{
printf("%s: ", (char *)Sock_ntop(ifi->ifi_addr, sizeof(struct sockaddr_in)));
sin = (struct sockaddr_in *)&arpreq.arp_pa;
memcpy(sin, ifi->ifi_addr, sizeof(struct sockaddr_in));
if (ioctl(sockfd, SIOCGARP, &arpreq) < 0)
{
err_ret("ioctl SIOCGARP");
continue;
}
ptr = &arpreq.arp_ha.sa_data[0];
printf("%x:%x:%x:%x:%x:%x\n", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5));
}
exit(0);
}
int main(int argc, char **argv) {
int listenfd, connfd;
socklen_t addrlen, len;
struct sockaddr *cliaddr;
char buff[MAXLINE];
time_t ticks;
if (argc < 2 || argc > 3)
err_quit("usage: daytimetcpsrv2 [ <host> ] <service or port#>");
daemon_init(argv[0], 0);
if (argc == 2)
listenfd = Tcp_listen(NULL, argv[1], &addrlen);
else
listenfd = Tcp_listen(argv[1], argv[2], &addrlen);
cliaddr = Malloc(addrlen);
for (;;) {
len = addrlen;
connfd = Accept(listenfd, cliaddr, &len);
err_msg("connection from %s", Sock_ntop(cliaddr, len));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
Write(connfd, buff, strlen(buff));
Close(connfd);
}
}
void
sctp_print_addresses(struct sockaddr_storage *addrs, int num)
{
struct sockaddr_storage *ss;
int i,salen;
ss = addrs;
for(i=0; i<num; i++){
printf("%s\n", Sock_ntop((SA *)ss, salen));
#ifdef HAVE_SOCKADDR_SA_LEN
salen = ss->ss_len;
#else
switch(ss->ss_family) {
case AF_INET:
salen = sizeof(struct sockaddr_in);
break;
#ifdef IPV6
case AF_INET6:
salen = sizeof(struct sockaddr_in6);
break;
#endif
default:
err_quit("sctp_print_addresses: unknown AF");
break;
}
#endif
ss = (struct sockaddr_storage *)((char *)ss + salen);
}
}
int
main(int argc, char **argv)
{
int i, listenfd, connfd;
socklen_t addrlen, len;
struct sockaddr *cliaddr;
char buff[MAXLINE];
time_t ticks;
if (argc == 2)
listenfd = Tcp_listen(NULL, argv[1], &addrlen);
else if (argc == 3)
listenfd = Tcp_listen(argv[1], argv[2], &addrlen);
else
err_quit("usage: daytimetcpsrv2 [ <host> ] <service or port>");
cliaddr = Malloc(addrlen);
for ( ; ; ) {
len = addrlen;
connfd = Accept(listenfd, cliaddr, &len);
printf("connection from %s\n", Sock_ntop(cliaddr, len));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
for (i = 0; i < strlen(buff); i++)
Send(connfd, &buff[i], 1, MSG_EOR);
Close(connfd);
}
}
int main(int argc, char** argv)
{
int listenfd, connfd;
socklen_t len;
char buff[MAXLINE];
time_t ticks;
struct sockaddr_in6 servaddr, cliaddr;
listenfd = Socket(AF_INET6, SOCK_STREAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin6_family = AF_INET6;
servaddr.sin6_addr = in6addr_any;
servaddr.sin6_port = htons(13); /* 时间服务器 */
Bind(listenfd, (SA*)&servaddr, sizeof(servaddr));
Listen(listenfd, LISTENQ);
for (;;) {
len = sizeof(cliaddr);
connfd = Accept(listenfd, (SA*)&cliaddr, &len);
printf("来自 %s 的连接\n", Sock_ntop((SA*)&cliaddr, len));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
Write(connfd, buff, strlen(buff));
Close(connfd);
}
}
void *sendscl_tcps_conn(void *arg)
{
ssize_t n;
char buf[MAXLINE];
char conninfo[128];
newconn_t *conn;
int connfd;
conn = (newconn_t *)arg;
connfd = conn->fd;
// show connection information
memset(conninfo, 0, sizeof(conninfo));
snprintf(conninfo, sizeof(conninfo), "[addr: %s][addrlen: %d]",
Sock_ntop((SA *)&conn->cliaddr, conn->len), conn->len);
SEND_DBG(DBG_FLAG_SCL, "new connection--> %s\n", conninfo);
free(conn);
for(; ;) {
n = Recvfrom(unixfd, buf, MAXLINE, 0, NULL, NULL);
if(n > 0) {
//for debug, print received data
SEND_PRINT(sendg.debug_scl, conninfo, buf, n);
Write(connfd, buf, n);
}
}
Close(connfd);
return NULL;
}
int
main(int argc, char **argv)
{
int sockfd;
ssize_t n;
char buff[MAXLINE];
time_t ticks;
socklen_t addrlen, len;
struct sockaddr *cliaddr;
if (argc == 2)
sockfd = Udp_server_reuseaddr(NULL, argv[1], &addrlen);
else if (argc == 3)
sockfd = Udp_server_reuseaddr(argv[1], argv[2], &addrlen);
else
err_quit("usage: daytimeudpsrv [ <host> ] <service or port>");
cliaddr = Malloc(addrlen);
for ( ; ; ) {
len = addrlen;
n = Recvfrom(sockfd, buff, MAXLINE, 0, cliaddr, &len);
printf("datagram from %s\n", Sock_ntop(cliaddr, len));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
Sendto(sockfd, buff, strlen(buff), 0, cliaddr, len);
}
}
void
dg_cli(FILE *fp, int sockfd, const SA *pservaddr, socklen_t servlen)
{
int n;
char sendline[MAXLINE], recvline[MAXLINE + 1];
socklen_t len;
struct sockaddr *preply_addr;
preply_addr = Malloc(servlen);
while (Fgets(sendline, MAXLINE, fp) != NULL) {
Sendto(sockfd, sendline, strlen(sendline), 0, pservaddr, servlen);
len = servlen;
n = Recvfrom(sockfd, recvline, MAXLINE, 0, preply_addr, &len);
if (len != servlen || memcmp(pservaddr, preply_addr, len) != 0) {
printf("reply from %s (ignored)\n",
Sock_ntop(preply_addr, len));
continue;
}
recvline[n] = 0; /* null terminate */
Fputs(recvline, stdout);
}
}
void
dg_echo(int sockfd, struct sockaddr *pcliaddr, socklen_t clilen)
{
int flags;
const int on = 1;
socklen_t len;
ssize_t n;
char mesg[MAXLINE], str[INET6_ADDRSTRLEN],
ifname[IFNAMSIZ];
struct in_addr in_zero;
struct unp_in_pktinfo pktinfo;
/* 若支持IP_RECVDSATDDR和IP_RECVIF套接字选项，则设置它们 */
#ifdef IP_RECVDSTADDR
if (setsockopt(sockfd, IPPROTO_IP, IP_RECVDSTADDR, &on, sizeof(on)) < 0)
err_ret("setsockopt of IP_RECVDSTADDR");
#endif
#ifdef IP_RECVIF
if (setsockopt(sockfd, IPPROTO_IP, IP_RECVIF, &on, sizeof(on)) < 0)
err_ret("setsockopt of IP_RECVIF");
#endif
bzero(&in_zero, sizeof(struct in_addr)); /* all 0 IPv4 address */
for ( ; ; ) {
len = clilen;
flags = 0;
/* 读取来自套接字的数据报 */
n = recvfrom_flag(sockfd, mesg, MAXLINE, &flags,
pcliaddr, &len, &pktinfo);
/* 把所读取的字节数显示，最大字节数不能超过20字节，若超过，则发生截断情况；
* 调用sock_ntop把源IP地址和端口号转换为表达格式并输出 */
printf("%d-byte datagram from %s", n, Sock_ntop(pcliaddr, len));
/* 若返回的IP地址不为0，则调用inet_ntop转化目的IP地址格式并输出 */
if (memcmp(&pktinfo.ipi_addr, &in_zero, sizeof(in_zero)) != 0)
printf(", to %s", inet_ntop(AF_INET, &pktinfo.ipi_addr,
str, sizeof(str)));
printf(", index = %d", pktinfo.ipi_ifindex);
/* 若返回的接口索引不为0，则调用if_indextoname获取接口名字并显示 */
if (pktinfo.ipi_ifindex > 0)
printf(", recv i/f = %s",
if_indextoname(pktinfo.ipi_ifindex, ifname));
printf(", flags = %d",flags);
/* 以下是测试4个标志 */
#ifdef MSG_TRUNC
if (flags & MSG_TRUNC) printf(" (datagram truncated)");
#endif
#ifdef MSG_CTRUNC
if (flags & MSG_CTRUNC) printf(" (control info truncated)");
#endif
#ifdef MSG_BCAST
if (flags & MSG_BCAST) printf(" (broadcast)");
#endif
#ifdef MSG_MCAST
if (flags & MSG_MCAST) printf(" (multicast)");
#endif
printf("\n");
/* 回射文本字符串给客户端 */
sendto(sockfd, mesg, n, 0, pcliaddr, len);
}
}
void mydg_echo(int sockfd, SA* myaddr, socklen_t salen)
{
int n;
char mesg[MAXLINE];
socklen_t len;
struct sockaddr* cli;
cli = Malloc(salen);
for (;;) {
len = salen;
n = Recvfrom(sockfd, mesg, MAXLINE, 0, cli, &len);
printf("child %d, datagram from %s", getpid(), Sock_ntop(cli, len));
printf(", to %s\n", Sock_ntop(myaddr, salen));
Sendto(sockfd, mesg, n, 0, cli, len);
}
}
void adv_mydg_echo(int sockfd, SA *pcliaddr, socklen_t clilen,
SA *myaddr)
{
int n;
char mesg[MAXLINE];
socklen_t len;
for (;;) {
len = clilen;
n = Recvfrom(sockfd, mesg, MAXLINE, 0, pcliaddr, &len);
printf("child %d, datagram from %s",
getpid(), Sock_ntop(pcliaddr, len));
printf(", to %s\n", Sock_ntop(myaddr, clilen));
Sendto(sockfd, mesg, n, 0, pcliaddr, len);
}
}
int main(int argc, char **argv)
{
int sockfd, n;
char recvline[MAXLINE + 1];
struct sockaddr_in servaddr;
struct in_addr **pptr;
struct in_addr *inetaddrp[2];
struct in_addr inetaddr;
struct hostent *hp;
struct servent *sp;
if (argc != 3)
err_quit("Usage: servent <hostname> <service>");
if ((hp = gethostbyname(argv[1])) == NULL)
{
if (inet_aton(argv[1], &inetaddr) == 0)
err_quit("hostname error for %s: %s", argv[1], hstrerror(h_errno));
else
inetaddrp[0] = &inetaddr;
inetaddrp[1] = NULL;
pptr = inetaddrp;
}
else
pptr = (struct in_addr **)hp->h_addr_list;
if ((sp = getservbyname(argv[2], "tcp")) == NULL)
err_quit("getserbyname error for %s", argv[2]);
for ( ; *pptr != NULL; pptr++)
{
sockfd = Socket(AF_INET, SOCK_STREAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = sp->s_port;
memcpy(&servaddr.sin_addr, *pptr, sizeof(struct in_addr));
printf("trying %s\n", Sock_ntop((SA *)&servaddr, sizeof(servaddr)));
if (connect(sockfd, (SA *)&servaddr, sizeof(servaddr)) == 0)
break;
err_ret("connect error");
close(sockfd);
}
if (*pptr == NULL)
err_quit("unable to connect");
while ((n = Read(sockfd, recvline, MAXLINE)) > 0)
{
recvline[n] = 0;
Fputs(recvline, stdout);
}
exit(0);
}
int
main(int argc, char **argv)
{
int sockfd, n;
char recvline[MAXLINE + 1];
struct sockaddr_in servaddr;
struct in_addr **pptr, *addrs[2];
struct hostent *hp;
struct servent *sp;
if (argc != 3)
err_quit("usage: daytimetcpcli2 <hostname> <service>");
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) == 1) {
addrs[0] = &servaddr.sin_addr;
addrs[1] = NULL;
pptr = &addrs[0];
} else if ( (hp = gethostbyname(argv[1])) != NULL) {
pptr = (struct in_addr **) hp->h_addr_list;
} else
err_quit("hostname error for %s: %s", argv[1], hstrerror(h_errno));
if ( (n = atoi(argv[2])) > 0)
servaddr.sin_port = htons(n);
else if ( (sp = getservbyname(argv[2], "tcp")) != NULL)
servaddr.sin_port = sp->s_port;
else
err_quit("getservbyname error for %s", argv[2]);
for ( ; *pptr != NULL; pptr++) {
sockfd = Socket(AF_INET, SOCK_STREAM, 0);
memmove(&servaddr.sin_addr, *pptr, sizeof(struct in_addr));
printf("trying %s\n",
Sock_ntop((SA *) &servaddr, sizeof(servaddr)));
if (connect(sockfd, (SA *) &servaddr, sizeof(servaddr)) == 0)
break; /* success */
err_ret("connect error");
close(sockfd);
}
if (*pptr == NULL)
err_quit("unable to connect");
while ( (n = Read(sockfd, recvline, MAXLINE)) > 0) {
recvline[n] = 0; /* null terminate */
Fputs(recvline, stdout);
}
exit(0);
}
void
dg_echo(int sockfd, SA *pcliaddr, socklen_t clilen)
{
int flags;
const int on = 1;
socklen_t len;
ssize_t n;
char mesg[MAXLINE], str[INET6_ADDRSTRLEN],
ifname[IFNAMSIZ];
struct in_addr in_zero;
struct unp_in_pktinfo pktinfo;
#ifdef IP_RECVDSTADDR
if (setsockopt(sockfd, IPPROTO_IP, IP_RECVDSTADDR, &on, sizeof(on)) < 0)
err_ret("setsockopt of IP_RECVDSTADDR");
#endif
#ifdef IP_RECVIF
if (setsockopt(sockfd, IPPROTO_IP, IP_RECVIF, &on, sizeof(on)) < 0)
err_ret("setsockopt of IP_RECVIF");
#endif
bzero(&in_zero, sizeof(struct in_addr)); /* all 0 IPv4 address */
for ( ; ; )
{
len = clilen;
flags = 0;
n = Recvfrom_flags(sockfd, mesg, MAXLINE, &flags,
pcliaddr, &len, &pktinfo);
printf("%d-byte datagram from %s", n, Sock_ntop(pcliaddr, len));
if (memcmp(&pktinfo.ipi_addr, &in_zero, sizeof(in_zero)) != 0)
printf(", to %s", Inet_ntop(AF_INET, &pktinfo.ipi_addr,
str, sizeof(str)));
if (pktinfo.ipi_ifindex > 0)
printf(", recv i/f = %s",
If_indextoname(pktinfo.ipi_ifindex, ifname));
#ifdef MSG_TRUNC
if (flags & MSG_TRUNC) printf(" (datagram truncated)");
#endif
#ifdef MSG_CTRUNC
if (flags & MSG_CTRUNC) printf(" (control info truncated)");
#endif
#ifdef MSG_BCAST
if (flags & MSG_BCAST) printf(" (broadcast)");
#endif
#ifdef MSG_MCAST
if (flags & MSG_MCAST) printf(" (multicast)");
#endif
printf("\n");
Sendto(sockfd, mesg, n, 0, pcliaddr, len);
}
}
int
main(int argc, char **argv)
{
int sockfd;
ssize_t n;
char buff[MAXLINE];
time_t ticks;
socklen_t len;
struct sockaddr_storage cliaddr;
struct addrinfo hints, *res;
int on = 1;
if (argc == 2)
sockfd = Udp_server(NULL, argv[1], NULL);
else if (argc == 3) {
bzero(&hints, sizeof(struct addrinfo));
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
if ( ( n = getaddrinfo(argv[1], argv[2], &hints, &res)) != 0)
err_quit("udp_server error for %s, %s: %s",
argv[1], argv[2], gai_strerror(n));
do {
sockfd = socket(res->ai_family, res->ai_socktype,
res->ai_protocol);
if (sockfd < 0)
continue; /* error - try next one */
Setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
&on, sizeof(on));
if (bind(sockfd, res->ai_addr, res->ai_addrlen) == 0)
break; /* success */
Close(sockfd);
} while ( (res = res->ai_next) != NULL);
if (res == NULL)
err_sys("udp_server error");
} else
err_quit("usage: daytimeudpsrv [ <host> ] <service or port>");
for ( ; ; ) {
len = sizeof(cliaddr);
n = Recvfrom(sockfd, buff, MAXLINE, 0, (SA *)&cliaddr, &len);
printf("datagram from %s\n", Sock_ntop((SA *)&cliaddr, len));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
Sendto(sockfd, buff, strlen(buff), 0, (SA *)&cliaddr, len);
}
}
void *recvscl_tcps_conn(void *arg)
{
int connfd;
newconn_t *conn;
ssize_t n;
char buf[MAXLINE];
int sclfd = -1;
char conninfo[128];
// show connection information
conn = (newconn_t *)arg;
connfd = conn->fd;
memset(conninfo, 0, sizeof(conninfo));
snprintf(conninfo, sizeof(conninfo), "[%s]",
Sock_ntop((SA *)&conn->cliaddr, conn->len));
RECVSCL_DBG("new connection--> %s\n", conninfo);
free(conn);
// todo, whether need it?
Pthread_detach(pthread_self());
// ricann todo, decide save file name from camid
sclfd = recv_openfile(recvg.save_scl, 0, recvg.save_scl_name);
for(; ;) {
n = read(connfd, buf, MAXLINE);
if(n == 0)
break;
if(n < 0) {
if(errno == EINTR)
continue;
recv_closefile(recvg.save_scl, sclfd);
err_sys("[recvscl_tcps_conn]read error");
}
// debug info
RECVSCL_DBG("[tcps]%s: recv %d bytes...\n", conninfo, n);
// print receive data
RECV_PRINT(recvg.debug_scl, conninfo, buf, n);
// write info file
recv_writefile(recvg.save_scl, sclfd, buf, n);
}
recv_closefile(recvg.save_scl, sclfd);
return NULL;
}
void recv_all(int sockfd,socklen_t salen)
{
static char buf[MAXLINE+1];
struct sockaddr *sa;
socklen_t len;
int n;
sa = Malloc(salen);
for(;;){
len = salen;
n = recvfrom(sockfd,buf,MAXLINE,0,sa,&len);
buf[n] = 0;
printf("from %s : %s",Sock_ntop(sa,salen),buf);
}
}
void get_conn(client_conn *conn) {
const char *server_ip = (const char*)cargs->ip_addr;
int server_port = cargs->serv_portno;
struct sockaddr *serv_sa = inet_pton_sa(server_ip, server_port);
vector *ifaces = get_all_interfaces();
struct ifi_info serv_ifi;
memset(&serv_ifi, 0, sizeof(serv_ifi));
serv_ifi.ifi_addr = serv_sa;
conn->is_local = FALSE;
// Check if the server is on the same machine as the client.
algorithm_reduce(ifaces, is_local_interface_reducer, &serv_ifi);
// serv_ifi.ifi_myflags is == 1 if the client & server share an IP
// address.
if (serv_ifi.ifi_myflags) {
// Client & server are on the same machine.
conn->is_local = TRUE;
conn->cli_sa = inet_pton_sa("127.0.0.1", 0);
conn->serv_sa = inet_pton_sa("127.0.0.1", server_port);
return;
}
serv_ifi.ifi_myflags = 0; // The length of the longest match.
algorithm_reduce(ifaces, longest_match_reducer, &serv_ifi);
if (serv_ifi.ifi_brdaddr) {
conn->is_local = TRUE;
conn->serv_sa = serv_sa;
char client_ip[40];
strcpy(client_ip, Sock_ntop_host(serv_ifi.ifi_brdaddr, sizeof(SA)));
// Client bind(2)s to port 0 (locally).
conn->cli_sa = inet_pton_sa(client_ip, 0);
return;
}
// We could not find any local interfaces that match. Let the kernel
// choose the outgoing interface for us.
VERBOSE("serv_sa: %s\n", Sock_ntop(serv_sa, sizeof(*serv_sa)));
conn->cli_sa = inet_pton_sa("0.0.0.0", 0);
conn->serv_sa = serv_sa;
}
int
main(int argc, char **argv)
{
int listenfd, connfd;
socklen_t clilen;
struct sockaddr_un cliaddr, servaddr;
char buff[MAXLINE];
time_t ticks;
size_t nbytes;
int i;
if (argc != 1)
err_quit("usage: daytimetcpsrv2 [ <host> ] <service or port>");
listenfd = Socket(AF_UNIX, SOCK_STREAM, 0);
unlink(UNIXSTR_PATH);
bzero(&servaddr, sizeof(struct sockaddr_un));
servaddr.sun_family = AF_UNIX;
strcpy(servaddr.sun_path, UNIXSTR_PATH);
Bind(listenfd, (SA *) &servaddr, SUN_LEN(&servaddr));
Listen(listenfd, LISTENQ);
for ( ; ; ) {
clilen = sizeof(cliaddr);
if ( (connfd = accept(listenfd, (SA *)&cliaddr, &clilen)) < 0) {
if (errno == EINTR)
continue;
else
err_sys("accept error");
}
printf("connection from %s\n", Sock_ntop((SA *)&cliaddr, clilen));
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
nbytes = strlen(buff);
for (i = 0; i < nbytes; i++) {
if (send(connfd, buff+i, 1, MSG_EOR) < 0)
err_sys("send error");
/* Write(connfd, buff+i, 1); */
}
Close(connfd);
}
}
int
main(int argc, char **argv)
{
int sockfd;
ssize_t n;
char buff[MAXLINE];
time_t ticks;
socklen_t len;
struct sockaddr_storage cliaddr;
if ( argc == 2)
sockfd = Udp_server( NULL, argv[1], NULL);
else if ( argc == 3)
sockfd = Udp_server( argv[1], argv[2], NULL);
else
err_quit( "usage: daytimeudpsrv [ <host> ] <service or port>");
for ( ; ; ) {
len = sizeof(cliaddr);
/* since socket is unconnected we use Recvfrom and Sendto,
* not Read, Write */
n = Recvfrom(sockfd, buff, MAXLINE, 0, (SA *)&cliaddr, &len);
printf( "datagram from %s\n", Sock_ntop((SA *)&cliaddr, len));
/* response */
time_t rawTime;
time( &rawTime);
struct tm * timeInfo;
timeInfo = localtime( &rawTime);
strftime( buff, MAXLINE, "cf16 daytime service on port 13. "
"The time on this server now is: %A, %B %d, %G %T %p-%Z\n",
timeInfo);
//ticks = time(NULL);
//snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
Sendto( sockfd, buff, strlen(buff), 0, (SA *)&cliaddr, len);
/* At this moment we don't know if peer is reachable or not
* If it is not reachable sendto return Success but Recvfrom
* will block forever (it doesn't see an ICMP "destination
* unreachable" packet coming back from peer because socket
* is unconnected)
*/
}
}
int main(int argc, char const *argv[])
{
socklen_t len;
struct sockaddr *cliaddr;
char buff[MAXLINE];
time_t ticks;
daemon_inetd(argv[0],LOG_LOCAL2);
cliaddr=(struct sockaddr *)Malloc(sizeof(struct sockaddr_storage));
len=sizeof(struct sockaddr_storage);
Getpeername(0,cliaddr,&len);
err_msg("connection from %s",Sock_ntop(cliaddr,len));
ticks=time(NULL);
snprintf(buff,sizeof(buff),"%.24s\r\n",ctime(&ticks));
Write(0,buff,strlen(buff));
Close(0);//close TCP connection
return 0;
}
void
recv_all(int recvfd, socklen_t salen)
{
int n;
char line[MAXLINE+1];
socklen_t len;
struct sockaddr *safrom;
safrom = Malloc(salen);
for ( ; ; ) {
len = salen;
n = Recvfrom(recvfd, line, MAXLINE, 0, safrom, &len);
line[n] = 0; /* null terminate */
printf("from %s: %s", Sock_ntop(safrom, len), line);
}
}