5 #include <sys/socket.h>
7 #include <netinet/in.h>
16 #define closesocket close
17 #define fcntlsocket fcntl
20 static int handle_control(struct ftp *ftp);
21 static int handle_data(struct ftp *ftp, int s);
22 static void proc_control(struct ftp *ftp, const char *buf);
24 struct ftp *ftp_alloc(void)
28 if(!(ftp = calloc(1, sizeof *ftp))) {
31 ftp->ctl = ftp->data = -1;
35 void ftp_free(struct ftp *ftp)
44 int ftp_connect(struct ftp *ftp, const char *hostname, int port)
47 struct sockaddr_in addr;
49 if((ftp->ctl = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
50 errmsg("failed to create control socket\n");
54 if(!(host = gethostbyname(hostname))) {
55 errmsg("failed to resolve host: %s\n", hostname);
56 closesocket(ftp->ctl);
61 memset(&addr, 0, sizeof addr);
62 addr.sin_family = AF_INET;
63 addr.sin_addr = *((struct in_addr*)host->h_addr);
64 addr.sin_port = htons(port);
66 if(connect(ftp->ctl, (struct sockaddr*)&addr, sizeof addr) == -1) {
67 errmsg("failed to connect to: %s (port: %d)\n", hostname, port);
68 closesocket(ftp->ctl);
73 fcntlsocket(ftp->ctl, F_SETFL, fcntlsocket(ftp->ctl, F_GETFL) | O_NONBLOCK);
78 void ftp_close(struct ftp *ftp)
81 closesocket(ftp->ctl);
86 closesocket(ftp->data);
92 int ftp_sockets(struct ftp *ftp, int *sockv, int maxsize)
94 if(ftp->ctl >= 0 && maxsize) {
101 int ftp_pending(struct ftp *ftp)
105 struct timeval tv = {0, 0};
109 FD_SET(ftp->ctl, &rdset);
113 FD_SET(ftp->data, &rdset);
114 if(ftp->data > maxfd) maxfd = ftp->data;
116 if(maxfd == -1) return 0;
118 return select(maxfd + 1, &rdset, 0, 0, &tv) > 0 ? 1 : 0;
121 int ftp_handle(struct ftp *ftp, int s)
124 return handle_control(ftp);
127 return handle_data(ftp, s);
132 static int handle_control(struct ftp *ftp)
135 char *buf, *start, *end;
137 while((sz = sizeof ftp->crecv - ftp->num_crecv) > 0) {
138 start = ftp->crecv + ftp->num_crecv;
139 if((rd = recv(ftp->ctl, start, sz, 0)) == -1) {
140 if(errno == EINTR) continue;
141 /* assume EWOULDBLOCK, try again next time */
151 for(i=0; i<rd; i++) {
152 if(start[i] == '\n') {
154 proc_control(ftp, buf);
158 if(buf != ftp->crecv && buf < end) {
159 ftp->num_crecv = end - buf;
160 memmove(ftp->crecv, buf, ftp->num_crecv);
166 static int handle_data(struct ftp *ftp, int s)
171 static void proc_control(struct ftp *ftp, const char *buf)
175 int ftp_update(struct ftp *ftp)
180 int ftp_chdir(struct ftp *ftp, const char *dirname)