7 #include <sys/socket.h>
9 #include <netinet/in.h>
18 #define closesocket close
19 #define fcntlsocket fcntl
22 static int sendcmd(struct ftp *ftp, const char *fmt, ...);
23 static int handle_control(struct ftp *ftp);
24 static int handle_data(struct ftp *ftp, int s);
25 static void proc_control(struct ftp *ftp, const char *buf);
27 static void cproc_pwd(struct ftp *ftp, int code, const char *buf, void *cls);
28 static void cproc_cwd(struct ftp *ftp, int code, const char *buf, void *cls);
31 struct ftp *ftp_alloc(void)
35 if(!(ftp = calloc(1, sizeof *ftp))) {
38 ftp->ctl = ftp->data = -1;
42 void ftp_free(struct ftp *ftp)
51 int ftp_connect(struct ftp *ftp, const char *hostname, int port)
54 struct sockaddr_in addr;
56 if((ftp->ctl = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
57 errmsg("failed to create control socket\n");
61 if(!(host = gethostbyname(hostname))) {
62 errmsg("failed to resolve host: %s\n", hostname);
63 closesocket(ftp->ctl);
68 memset(&addr, 0, sizeof addr);
69 addr.sin_family = AF_INET;
70 addr.sin_addr = *((struct in_addr*)host->h_addr);
71 addr.sin_port = htons(port);
73 if(connect(ftp->ctl, (struct sockaddr*)&addr, sizeof addr) == -1) {
74 errmsg("failed to connect to: %s (port: %d)\n", hostname, port);
75 closesocket(ftp->ctl);
80 fcntlsocket(ftp->ctl, F_SETFL, fcntlsocket(ftp->ctl, F_GETFL) | O_NONBLOCK);
85 void ftp_close(struct ftp *ftp)
88 closesocket(ftp->ctl);
93 closesocket(ftp->data);
99 int ftp_sockets(struct ftp *ftp, int *sockv, int maxsize)
101 if(ftp->ctl >= 0 && maxsize) {
108 int ftp_pending(struct ftp *ftp)
112 struct timeval tv = {0, 0};
116 FD_SET(ftp->ctl, &rdset);
120 FD_SET(ftp->data, &rdset);
121 if(ftp->data > maxfd) maxfd = ftp->data;
123 if(maxfd == -1) return 0;
125 return select(maxfd + 1, &rdset, 0, 0, &tv) > 0 ? 1 : 0;
128 int ftp_handle(struct ftp *ftp, int s)
131 return handle_control(ftp);
134 return handle_data(ftp, s);
139 static int sendcmd(struct ftp *ftp, const char *fmt, ...)
149 vsprintf(buf, fmt, ap);
153 return send(ftp->ctl, buf, strlen(buf), 0);
156 static int handle_control(struct ftp *ftp)
159 char *buf, *start, *end;
161 while((sz = sizeof ftp->crecv - ftp->num_crecv) > 0) {
162 start = ftp->crecv + ftp->num_crecv;
163 if((rd = recv(ftp->ctl, start, sz, 0)) == -1) {
164 if(errno == EINTR) continue;
165 /* assume EWOULDBLOCK, try again next time */
175 for(i=0; i<rd; i++) {
176 if(start[i] == '\n') {
178 proc_control(ftp, buf);
182 if(buf != ftp->crecv && buf < end) {
183 ftp->num_crecv = end - buf;
184 memmove(ftp->crecv, buf, ftp->num_crecv);
190 static int handle_data(struct ftp *ftp, int s)
195 static int respcode(const char *resp)
197 if(!isdigit(resp[0]) || !isdigit(resp[1]) || !isdigit(resp[2])) {
201 if(isspace(resp[3])) {
210 static void proc_control(struct ftp *ftp, const char *buf)
214 while(*buf && isspace(*buf)) buf++;
216 if((code = respcode(buf)) == 0) {
217 warnmsg("ignoring invalid response: %s\n", buf);
221 return; /* ignore continuations for now */
225 ftp->cproc(ftp, code, buf, ftp->cproc_cls);
232 sendcmd(ftp, "user %s", ftp->user ? ftp->user : "anonymous");
235 sendcmd(ftp, "pass %s", ftp->pass ? ftp->pass : "foobar");
239 infomsg("login successful\n");
245 errmsg("login failed\n");
250 int ftp_update(struct ftp *ftp)
255 int ftp_pwd(struct ftp *ftp)
258 ftp->cproc = cproc_pwd;
262 int ftp_chdir(struct ftp *ftp, const char *dirname)
265 sendcmd(ftp, "cwd %s", dirname);
266 ftp->cproc = cproc_cwd;
270 static int get_quoted_text(const char *str, char *buf)
273 const char *src, *end;
275 if(!(src = strchr(str, '"'))) {
280 while(*end && *end != '"') end++;
284 memcpy(buf, src, len);
289 static void cproc_pwd(struct ftp *ftp, int code, const char *buf, void *cls)
294 warnmsg("pwd failed\n");
298 dirname = alloca(strlen(buf) + 1);
299 if(get_quoted_text(buf, dirname) == -1) {
300 warnmsg("pwd: invalid response: %s\n", buf);
304 free(ftp->curdir_rem);
305 ftp->curdir_rem = strdup_nf(dirname);
309 static void cproc_cwd(struct ftp *ftp, int code, const char *buf, void *cls)