#include "config.h"
#endif /* HAVE_CONFIG_H */
+#include <atalk/standards.h>
+
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
-#include <arpa/inet.h>
+#include <sys/uio.h>
#include <netinet/in.h>
+#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <time.h>
+#include <sys/ioctl.h>
#include <atalk/logger.h>
+#include <atalk/util.h>
static char ipv4mapprefix[] = {0,0,0,0,0,0,0,0,0,0,0xff,0xff};
* io mode for the socket
* @param timeout (r) number of seconds to try reading
*
- * @returns number of bytes actually read or -1 on fatal error
+ * @returns number of bytes actually read or -1 on timeout or error
*/
ssize_t readt(int socket, void *data, const size_t length, int setnonblocking, int timeout)
{
- size_t stored;
- ssize_t len;
+ size_t stored = 0;
+ ssize_t len = 0;
struct timeval now, end, tv;
fd_set rfds;
int ret;
- stored = 0;
+ FD_ZERO(&rfds);
+
+ if (setnonblocking) {
+ if (setnonblock(socket, 1) != 0)
+ return -1;
+ }
+
+ /* Calculate end time */
+ (void)gettimeofday(&now, NULL);
+ end = now;
+ end.tv_sec += timeout;
+
+ while (stored < length) {
+ len = recv(socket, (char *) data + stored, length - stored, 0);
+ if (len == -1) {
+ switch (errno) {
+ case EINTR:
+ continue;
+ case EAGAIN:
+ FD_SET(socket, &rfds);
+ tv.tv_usec = 0;
+ tv.tv_sec = timeout;
+
+ while ((ret = select(socket + 1, &rfds, NULL, NULL, &tv)) < 1) {
+ switch (ret) {
+ case 0:
+ LOG(log_debug, logtype_dsi, "select timeout %d s", timeout);
+ errno = EAGAIN;
+ goto exit;
+
+ default: /* -1 */
+ switch (errno) {
+ case EINTR:
+ (void)gettimeofday(&now, NULL);
+ if (now.tv_sec > end.tv_sec
+ ||
+ (now.tv_sec == end.tv_sec && now.tv_usec >= end.tv_usec)) {
+ LOG(log_debug, logtype_afpd, "select timeout %d s", timeout);
+ goto exit;
+ }
+ if (now.tv_usec > end.tv_usec) {
+ tv.tv_usec = 1000000 + end.tv_usec - now.tv_usec;
+ tv.tv_sec = end.tv_sec - now.tv_sec - 1;
+ } else {
+ tv.tv_usec = end.tv_usec - now.tv_usec;
+ tv.tv_sec = end.tv_sec - now.tv_sec;
+ }
+ FD_SET(socket, &rfds);
+ continue;
+ case EBADF:
+ /* possibly entered disconnected state, don't spam log here */
+ LOG(log_debug, logtype_afpd, "select: %s", strerror(errno));
+ stored = -1;
+ goto exit;
+ default:
+ LOG(log_error, logtype_afpd, "select: %s", strerror(errno));
+ stored = -1;
+ goto exit;
+ }
+ }
+ } /* while (select) */
+ continue;
+ } /* switch (errno) */
+ LOG(log_error, logtype_afpd, "read: %s", strerror(errno));
+ stored = -1;
+ goto exit;
+ } /* (len == -1) */
+ else if (len > 0)
+ stored += len;
+ else
+ break;
+ } /* while (stored < length) */
+
+exit:
+ if (setnonblocking) {
+ if (setnonblock(socket, 0) != 0)
+ return -1;
+ }
+
+ if (len == -1 && stored == 0)
+ /* last read or select got an error and we haven't got yet anything => return -1*/
+ return -1;
+ return stored;
+}
+
+/*!
+ * non-blocking drop-in replacement for read with timeout using select
+ *
+ * @param socket (r) socket, if in blocking mode, pass "setnonblocking" arg as 1
+ * @param data (rw) buffer for the read data
+ * @param lenght (r) how many bytes to read
+ * @param setnonblocking (r) when non-zero this func will enable and disable non blocking
+ * io mode for the socket
+ * @param timeout (r) number of seconds to try reading
+ *
+ * @returns number of bytes actually read or -1 on fatal error
+ */
+ssize_t writet(int socket, void *data, const size_t length, int setnonblocking, int timeout)
+{
+ size_t stored = 0;
+ ssize_t len = 0;
+ struct timeval now, end, tv;
+ fd_set rfds;
+ int ret;
if (setnonblocking) {
if (setnonblock(socket, 1) != 0)
end.tv_sec += timeout;
while (stored < length) {
- len = read(socket, (char *) data + stored, length - stored);
+ len = write(socket, (char *) data + stored, length - stored);
if (len == -1) {
switch (errno) {
case EINTR:
* @param ai (rw) pointer to an struct sockaddr
* @parma mask (r) number of maskbits
*/
-void apply_ip_mask(struct sockaddr *sa, uint32_t mask)
+void apply_ip_mask(struct sockaddr *sa, int mask)
{
switch (sa->sa_family) {
return ret;
}
+
+/*!
+ * Add a fd to a dynamic pollfd array that is allocated and grown as needed
+ *
+ * This uses an additional array of struct polldata which stores type information
+ * (enum fdtype) and a pointer to anciliary user data.
+ *
+ * 1. Allocate the arrays with the size of "maxconns" if *fdsetp is NULL.
+ * 2. Fill in both array elements and increase count of used elements
+ *
+ * @param maxconns (r) maximum number of connections, determines array size
+ * @param fdsetp (rw) pointer to callers pointer to the pollfd array
+ * @param polldatap (rw) pointer to callers pointer to the polldata array
+ * @param fdset_usedp (rw) pointer to an int with the number of used elements
+ * @param fdset_sizep (rw) pointer to an int which stores the array sizes
+ * @param fd (r) file descriptor to add to the arrays
+ * @param fdtype (r) type of fd, currently IPC_FD or LISTEN_FD
+ * @param data (rw) pointer to data the caller want to associate with an fd
+ */
+void fdset_add_fd(int maxconns,
+ struct pollfd **fdsetp,
+ struct polldata **polldatap,
+ int *fdset_usedp,
+ int *fdset_sizep,
+ int fd,
+ enum fdtype fdtype,
+ void *data)
+{
+ struct pollfd *fdset = *fdsetp;
+ struct polldata *polldata = *polldatap;
+ int fdset_size = *fdset_sizep;
+
+ LOG(log_debug, logtype_default, "fdset_add_fd: adding fd %i in slot %i", fd, *fdset_usedp);
+
+ if (fdset == NULL) { /* 1 */
+ /* Initialize with space for all possibly active fds */
+ fdset = calloc(maxconns, sizeof(struct pollfd));
+ if (! fdset)
+ exit(EXITERR_SYS);
+
+ polldata = calloc(maxconns, sizeof(struct polldata));
+ if (! polldata)
+ exit(EXITERR_SYS);
+
+ fdset_size = maxconns;
+
+ *fdset_sizep = fdset_size;
+ *fdsetp = fdset;
+ *polldatap = polldata;
+
+ LOG(log_debug, logtype_default, "fdset_add_fd: initialized with space for %i conncections",
+ maxconns);
+ }
+
+ /* 2 */
+ fdset[*fdset_usedp].fd = fd;
+ fdset[*fdset_usedp].events = POLLIN;
+ polldata[*fdset_usedp].fdtype = fdtype;
+ polldata[*fdset_usedp].data = data;
+ (*fdset_usedp)++;
+}
+
+/*!
+ * Remove a fd from our pollfd array
+ *
+ * 1. Search fd
+ * 2a Matched last (or only) in the set ? null it and return
+ * 2b If we remove the last array elemnt, just decrease count
+ * 3. If found move all following elements down by one
+ * 4. Decrease count of used elements in array
+ *
+ * This currently doesn't shrink the allocated storage of the array.
+ *
+ * @param fdsetp (rw) pointer to callers pointer to the pollfd array
+ * @param polldatap (rw) pointer to callers pointer to the polldata array
+ * @param fdset_usedp (rw) pointer to an int with the number of used elements
+ * @param fdset_sizep (rw) pointer to an int which stores the array sizes
+ * @param fd (r) file descriptor to remove from the arrays
+ */
+void fdset_del_fd(struct pollfd **fdsetp,
+ struct polldata **polldatap,
+ int *fdset_usedp,
+ int *fdset_sizep _U_,
+ int fd)
+{
+ struct pollfd *fdset = *fdsetp;
+ struct polldata *polldata = *polldatap;
+
+ if (*fdset_usedp < 1)
+ return;
+
+ for (int i = 0; i < *fdset_usedp; i++) {
+ if (fdset[i].fd == fd) { /* 1 */
+ if ((i + 1) == *fdset_usedp) { /* 2a */
+ fdset[i].fd = -1;
+ memset(&polldata[i], 0, sizeof(struct polldata));
+ } else if (i < (*fdset_usedp - 1)) { /* 2b */
+ memmove(&fdset[i],
+ &fdset[i+1],
+ (*fdset_usedp - i - 1) * sizeof(struct pollfd)); /* 3 */
+ memmove(&polldata[i],
+ &polldata[i+1],
+ (*fdset_usedp - i - 1) * sizeof(struct polldata)); /* 3 */
+ }
+ (*fdset_usedp)--;
+ break;
+ }
+ }
+}
+
+/* Length of the space taken up by a padded control message of length len */
+#ifndef CMSG_SPACE
+#define CMSG_SPACE(len) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + __CMSG_ALIGN(len))
+#endif
+
+/*
+ * Receive a fd on a suitable socket
+ * @args fd (r) PF_UNIX socket to receive on
+ * @args nonblocking (r) 0: fd is in blocking mode - 1: fd is nonblocking, poll for 1 sec
+ * @returns fd on success, -1 on error
+ */
+int recv_fd(int fd, int nonblocking)
+{
+ int ret;
+ struct msghdr msgh;
+ struct iovec iov[1];
+ struct cmsghdr *cmsgp = NULL;
+ char buf[CMSG_SPACE(sizeof(int))];
+ char dbuf[80];
+ struct pollfd pollfds[1];
+
+ pollfds[0].fd = fd;
+ pollfds[0].events = POLLIN;
+
+ memset(&msgh,0,sizeof(msgh));
+ memset(buf,0,sizeof(buf));
+
+ msgh.msg_name = NULL;
+ msgh.msg_namelen = 0;
+
+ msgh.msg_iov = iov;
+ msgh.msg_iovlen = 1;
+
+ iov[0].iov_base = dbuf;
+ iov[0].iov_len = sizeof(dbuf);
+
+ msgh.msg_control = buf;
+ msgh.msg_controllen = sizeof(buf);
+
+ if (nonblocking) {
+ do {
+ ret = poll(pollfds, 1, 2000); /* poll 2 seconds, evtl. multipe times (EINTR) */
+ } while ( ret == -1 && errno == EINTR );
+ if (ret != 1)
+ return -1;
+ ret = recvmsg(fd, &msgh, 0);
+ } else {
+ do {
+ ret = recvmsg(fd, &msgh, 0);
+ } while ( ret == -1 && errno == EINTR );
+ }
+
+ if ( ret == -1 ) {
+ return -1;
+ }
+
+ for ( cmsgp = CMSG_FIRSTHDR(&msgh); cmsgp != NULL; cmsgp = CMSG_NXTHDR(&msgh,cmsgp) ) {
+ if ( cmsgp->cmsg_level == SOL_SOCKET && cmsgp->cmsg_type == SCM_RIGHTS ) {
+ return *(int *) CMSG_DATA(cmsgp);
+ }
+ }
+
+ if ( ret == sizeof (int) )
+ errno = *(int *)dbuf; /* Rcvd errno */
+ else
+ errno = ENOENT; /* Default errno */
+
+ return -1;
+}
+
+/*
+ * Send a fd across a suitable socket
+ */
+int send_fd(int socket, int fd)
+{
+ int ret;
+ struct msghdr msgh;
+ struct iovec iov[1];
+ struct cmsghdr *cmsgp = NULL;
+ char *buf;
+ size_t size;
+ int er=0;
+
+ size = CMSG_SPACE(sizeof fd);
+ buf = malloc(size);
+ if (!buf) {
+ LOG(log_error, logtype_cnid, "error in sendmsg: %s", strerror(errno));
+ return -1;
+ }
+
+ memset(&msgh,0,sizeof (msgh));
+ memset(buf,0, size);
+
+ msgh.msg_name = NULL;
+ msgh.msg_namelen = 0;
+
+ msgh.msg_iov = iov;
+ msgh.msg_iovlen = 1;
+
+ iov[0].iov_base = &er;
+ iov[0].iov_len = sizeof(er);
+
+ msgh.msg_control = buf;
+ msgh.msg_controllen = size;
+
+ cmsgp = CMSG_FIRSTHDR(&msgh);
+ cmsgp->cmsg_level = SOL_SOCKET;
+ cmsgp->cmsg_type = SCM_RIGHTS;
+ cmsgp->cmsg_len = CMSG_LEN(sizeof(fd));
+
+ *((int *)CMSG_DATA(cmsgp)) = fd;
+ msgh.msg_controllen = cmsgp->cmsg_len;
+
+ do {
+ ret = sendmsg(socket,&msgh, 0);
+ } while ( ret == -1 && errno == EINTR );
+ if (ret == -1) {
+ LOG(log_error, logtype_cnid, "error in sendmsg: %s", strerror(errno));
+ free(buf);
+ return -1;
+ }
+ free(buf);
+ return 0;
+}
projects / netatalk.git / blobdiff