// the opration of DIR command
void command_dir(struct packet* shp, struct packet* data, int sfd_client, char* lpwd)
{
int x;
shp->type = DATA;
DIR* d = opendir(lpwd);
if(!d)
{
er("opendir()", (int) d);
sprintf(shp->buffer, "ER: could not get the dir info!\n");
data = htonp(shp);
if( (x = send(sfd_server_data, data, size_packet,0)) != size_packet)
er("send()",x);
}
else
{
sprintf(shp->buffer, "OK: get the dir info.\n");
data = htonp(shp);
if(( x = send(sfd_server_data, data, size_packet, 0)) != size_packet)
er("send()",x);
}
struct dirent* e;
while(e = readdir(d))
{
sprintf(shp->buffer, "%s\t%s", e->d_type == 4 ? "DIR:" : e->d_type == 8 ? "FILE:" : "UNDEF:" , e->d_name);
data = htonp(shp);
//if(( x = send(sfd_client, data, size_packet, 0)) != size_packet)
if(( x = send(sfd_server_data, data, size_packet, 0)) != size_packet)
er("send()", x);
}
send_EOT(shp, data, sfd_server_data);
//send_EOT(shp, data, sfd_client);
}
void send_EOT(struct packet* hp, struct packet* data, int sfd)
{
int x;
hp->type = EOT;
data = htonp(hp);
if((x = send(sfd, data, size_packet, 0)) != size_packet)
er("send()", x);
}
void send_EOT(struct packet* hp, struct packet* data, int sfd)
{
int x;
hp->type = EOT;
hp->datalen = 0;
memset(hp->buffer, '\0', sizeof(char) *LENBUFFER);
data = htonp(hp);
if((x = send(sfd, data, size_packet, 0)) != size_packet)
er("send()", x);
}
void send_file(struct packet* hp, struct packet* data, int sfd, FILE* f)
{
int x;
int i = 0, j = 0;
while(!feof(f))
{
memset(hp->buffer, '\0', sizeof(char) * LENBUFFER);
hp->datalen = fread(hp->buffer, 1, LENBUFFER - 1, f);
i += hp->datalen;
//printpacket(hp, HP);
data = htonp(hp);
if((x = send(sfd, data, size_packet, 0)) != size_packet)
er("send()", x);
j++;
}
fprintf(stderr, "\t%d byte(s) read.\n", i);
fprintf(stderr, "\t%d data packet(s) sent.\n", j);
fflush(stderr);
}
// the operation of GET file command
void command_get(struct packet* shp, struct packet* data, int sfd_client, char* lpwd)
{
int x;
FILE* f = fopen(shp->buffer, "rb");
shp->type = INFO;
shp->comid = GET;
strcpy(shp->buffer, f ? "OK: File found; processing..." : "ER: Error opening file.");
printpacket(shp, HP);
data = htonp(shp);
if(( x = send(sfd_client, data, size_packet, 0)) != size_packet)
er("send()", x);
if(f)
{
shp->type = DATA;
//send_file(shp, data, sfd_client, f);
send_file(shp, data, sfd_server_data, f);
fclose(f);
}
send_EOT(shp, data, sfd_server_data);
//send_EOT(shp, data, sfd_client);
}
// the operation of PRT command
void command_prt(struct packet* shp, struct packet* data, int sfd_client, char* lpwd)
{
if(DEBUG)
printf("Starting prt...\n");
int x;
int dataportnum = atoi(shp->buffer);
shp->type = INFO;
shp->comid = PRT;
strcpy(shp->buffer, dataportnum ? "OK: Port Gotten; processing..." : "ER: Error getting port num.");
printpacket(shp, HP);
data = htonp(shp);
if(( x = send(sfd_client, data, size_packet, 0)) != size_packet)
er("send()", x);
if(DEBUG)
printf("OK, waiting for connection\n");
if(dataportnum)
{
struct sockaddr_in skin_server_data;
int x;
size_t size_sockaddr = sizeof(struct sockaddr), size_packet = sizeof(struct packet);
if(( x = sfd_server_data = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
er("socket()", x);
memset((char*) & skin_server_data, 0, sizeof(struct sockaddr_in));
skin_server_data.sin_family = AF_INET;
skin_server_data.sin_addr.s_addr = inet_addr(IPCLIENT);
skin_server_data.sin_port = htons(dataportnum);
if(( x = connect(sfd_server_data, (struct sockaddr*) &skin_server_data, size_sockaddr)) < 0)
er("connect()", x);
printf(ID "Data channel build. Communicating with client @ %s:%d...\n\n", IPCLIENT, dataportnum);
}
send_EOT(shp, data, sfd_client);
}
