void* serve_client(void* info) { int sfd_client, connection_id, x; struct packet* data = (struct packet*) malloc(size_packet); struct packet* shp; char lpwd[LENBUFFER]; struct client_info* ci = (struct client_info*) info; sfd_client = ci->sfd; connection_id = ci->cid; while(1) { if((x = recv(sfd_client, data, size_packet, 0)) == 0) { fprintf(stderr, "client closed/terminated. closing connection.\n"); break; } shp = ntohp(data); if(shp->type == TERM) break; if(shp->conid == -1) shp->conid = connection_id; if(shp->type == REQU) { switch(shp->comid) { case PWD: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_pwd(shp, data, sfd_client, lpwd); break; case CD: if((x = chdir(shp->buffer)) == -1) fprintf(stderr, "Wrong path.\n"); command_cd(shp, data, sfd_client, x == -1 ? "fail" : "success"); break; case MKDIR: command_mkdir(shp, data, sfd_client); break; case LS: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_ls(shp, data, sfd_client, lpwd); break; case GET: command_get(shp, data, sfd_client); break; case PUT: command_put(shp, data, sfd_client); break; case RGET: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_rget(shp, data, sfd_client); send_EOT(shp, data, sfd_client); if((x = chdir(lpwd)) == -1) fprintf(stderr, "Wrong path.\n"); default: // print error break; } /* //send info and then proceed to complete the request shp->type = INFO; strcpy(path, shp->buffer); sprintf(shp->buffer, "File found. Processing..."); data = htonp(shp); if((x = send(sfd_client, data, size_packet, 0)) != size_packet) er("send()", x); send_file(path, sfd_client, shp); send_TERM(sfd_client, shp); */ } else { //show error, send TERM and break fprintf(stderr, "packet incomprihensible. closing connection.\n"); send_TERM(shp, data, sfd_client); break; } } close(sfd_client); fflush(stdout); }
int main(int argc, char* argv[]) { //BEGIN: initialization struct sockaddr_in sin_server; int sfd_client, x; size_t size_sockaddr = sizeof(struct sockaddr), size_packet = sizeof(struct packet); short int connection_id; struct packet* chp = (struct packet*) malloc(size_packet); // client host packet set0(chp); struct packet* data; // network packet if((x = sfd_client = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) er("socket()", x); memset((char*) &sin_server, 0, sizeof(struct sockaddr_in)); sin_server.sin_family = AF_INET; sin_server.sin_addr.s_addr = inet_addr(IPSERVER); sin_server.sin_port = htons(PORTSERVER); if((x = connect(sfd_client, (struct sockaddr*) &sin_server, size_sockaddr)) < 0) er("connect()", x); printf(ID "FTP Client started up. Attempting communication with server @ %s:%d...\n\n", IPSERVER, PORTSERVER); //END: initialization struct command* cmd; char lpwd[LENBUFFER], pwd[LENBUFFER]; //用作本地和FTP server端的当前工作区间名的缓冲区 char userinput[LENUSERINPUT]; while(1) { printf("\t> "); fgets(userinput, LENUSERINPUT, stdin); /* in order to give a filename with spaces, put ':' instead of ' '. If a command needs x paths, and y (y > x) paths are provided, y - x paths will be ignored. */ cmd = userinputtocommand(userinput); if(!cmd) continue; //printcommand(cmd); switch(cmd->id) { case GET: if(cmd->npaths) command_get(chp, data, sfd_client, *cmd->paths); else fprintf(stderr, "No path to file given.\n"); break; case PUT: if(cmd->npaths) command_put(chp, data, sfd_client, *cmd->paths); else fprintf(stderr, "No path to file given.\n"); break; case MGET: if(cmd->npaths) command_mget(chp, data, sfd_client, cmd->npaths, cmd->paths); else fprintf(stderr, "No path to file given.\n"); break; case MPUT: if(cmd->npaths) command_mput(chp, data, sfd_client, cmd->npaths, cmd->paths); else fprintf(stderr, "No path to file given.\n"); break; case MGETWILD: command_mgetwild(chp, data, sfd_client); break; case MPUTWILD: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_mputwild(chp, data, sfd_client, lpwd); break; case CD: if(cmd->npaths) command_cd(chp, data, sfd_client, *cmd->paths); else fprintf(stderr, "No path given.\n"); break; case LCD: // 改变local 工作区间 if(cmd->npaths) command_lcd(*cmd->paths); else fprintf(stderr, "No path given.\n"); break; case PWD: command_pwd(chp, data, sfd_client); break; case LPWD: // local pwd if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); printf("\t%s\n", lpwd); break; case DIR_: case LS: command_ls(chp, data, sfd_client); break; case LDIR: case LLS: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_lls(lpwd); break; case MKDIR: if(cmd->npaths) command_mkdir(chp, data, sfd_client, *cmd->paths); else fprintf(stderr, "No path to directory given.\n"); break; case LMKDIR: if(cmd->npaths) command_lmkdir(*cmd->paths); else fprintf(stderr, "No path to directory given.\n"); break; case RGET: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_rget(chp, data, sfd_client); if((x = chdir(lpwd)) == -1) fprintf(stderr, "Wrong path.\n"); break; case RPUT: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_rput(chp, data, sfd_client); if((x = chdir(lpwd)) == -1) fprintf(stderr, "Wrong path.\n"); break; case EXIT: goto outside_client_command_loop; default: // display error break; } } outside_client_command_loop: /* chp->type = REQU; chp->conid = -1; strcpy(path, argv[1]); strcpy(chp->buffer, argv[1]); //printpacket(chp, HP); data = htonp(chp); if((x = send(sfd_client, data, size_packet, 0)) != size_packet) er("send()", x); set0(data); do { if((x = recv(sfd_client, data, size_packet, 0)) <= 0) er("recv()", x); chp = htonp(data); if(chp->type == INFO) printf(ID "Server says: %s\n", chp->buffer); else if(chp->type == DATA) { //printpacket(chp, HP); receive_file(extract_filename(path), sfd_client, chp); } } while(chp->type != TERM); fprintf(stderr, "TERM received; exiting...\n"); */ close(sfd_client); printf(ID "Done.\n"); fflush(stdout); return 0; }
void* serve_client(void* info) { int sfd_client, connection_id, x; struct packet shp; char lpwd[LENBUFFER]; struct client_info* ci = (struct client_info*) info; sfd_client = ci->sfd; connection_id = ci->cid; while(1) { if(recv_packet_ret(sfd_client, &shp) < 0) { fprintf(stderr, "client ID(%d) closed/terminated. closing connection.\n", connection_id); break; } if(shp.type == TERM) break; if(shp.conid == -1) shp.conid = connection_id; if(shp.type == REQU) { switch(shp.comid) { case PWD: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_pwd(sfd_client, &shp, lpwd); break; case CD: if((x = chdir(shp.buffer)) == -1) fprintf(stderr, "Wrong path.\n"); command_cd(sfd_client, &shp, x == -1 ? "fail" : "success"); break; case MKDIR: command_mkdir(sfd_client, &shp); break; case LS: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_ls(sfd_client, &shp, lpwd); break; case GET: command_get(sfd_client, &shp); break; case PUT: command_put(sfd_client, &shp); break; case RGET: if(!getcwd(lpwd, sizeof lpwd)) er("getcwd()", 0); command_rget(sfd_client, &shp); send_EOT(sfd_client, &shp); if((x = chdir(lpwd)) == -1) fprintf(stderr, "Wrong path.\n"); break; default: // print error break; } } else { //show error, send TERM and break fprintf(stderr, "packet incomprihensible. closing connection.\n"); send_TERM(sfd_client, &shp); break; } } close(sfd_client); fflush(stdout); return NULL; }