#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>
+#include <atalk/errchk.h>
static char ipv4mapprefix[] = {0,0,0,0,0,0,0,0,0,0,0xff,0xff};
return 0;
}
+/*!
+ * 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, 0 means no timeout
+ *
+ * @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 = 0;
+ ssize_t len = 0;
+ struct timeval now, end, tv;
+ fd_set rfds;
+ int ret;
+
+ FD_ZERO(&rfds);
+
+ if (setnonblocking) {
+ if (setnonblock(socket, 1) != 0)
+ return -1;
+ }
+
+ /* Calculate end time */
+ if (timeout) {
+ (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);
+ if (timeout) {
+ tv.tv_usec = 0;
+ tv.tv_sec = timeout;
+ }
+
+ while ((ret = select(socket + 1, &rfds, NULL, NULL, timeout ? &tv : NULL)) < 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:
+ if (timeout) {
+ (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
*
*
* @returns number of bytes actually read or -1 on fatal error
*/
-ssize_t readt(int socket, void *data, const size_t length, int setnonblocking, int timeout)
+ssize_t writet(int socket, void *data, const size_t length, int setnonblocking, int timeout)
{
size_t stored = 0;
ssize_t len = 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;
}
+
+/*!
+ * Tokenize IP(4/6) addresses with an optional port into address and port
+ *
+ * @param ipurl (r) IP URL string
+ * @param address (w) IP address
+ * @param port (w) IP port
+ *
+ * @returns 0 on success, -1 on failure
+ *
+ * Tokenize IPv4, IPv4:port, IPv6, [IPv6] or [IPv6:port] URL into address and
+ * port and return two allocated strings with the address and the port.
+ *
+ * If the function returns 0, then address point to a newly allocated
+ * valid address string, port may either be NULL or point to a newly
+ * allocated port number.
+ *
+ * If the function returns -1, then the contents of address and port are
+ * undefined.
+ */
+int tokenize_ip_port(const char *ipurl, char **address, char **port)
+{
+ EC_INIT;
+ char *p = NULL;
+ char *s;
+
+ AFP_ASSERT(ipurl && address && port);
+ EC_NULL( p = strdup(ipurl));
+
+ /* Either ipv4, ipv4:port, ipv6, [ipv6] or [ipv6]:port */
+
+ if (!strchr(p, ':')) {
+ /* IPv4 address without port */
+ *address = p;
+ p = NULL; /* prevent free() */
+ *port = NULL;
+ EC_EXIT_STATUS(0);
+ }
+
+ /* Either ipv4:port, ipv6, [ipv6] or [ipv6]:port */
+
+ if (strchr(p, '.')) {
+ /* ipv4:port */
+ *address = p;
+ p = strchr(p, ':');
+ *p = '\0';
+ EC_NULL( *port = strdup(p + 1));
+ p = NULL; /* prevent free() */
+ EC_EXIT_STATUS(0);
+ }
+
+ /* Either ipv6, [ipv6] or [ipv6]:port */
+
+ if (p[0] != '[') {
+ /* ipv6 */
+ *address = p;
+ p = NULL; /* prevent free() */
+ *port = NULL;
+ EC_EXIT_STATUS(0);
+ }
+
+ /* [ipv6] or [ipv6]:port */
+
+ EC_NULL( *address = strdup(p + 1) );
+
+ if ((s = strchr(*address, ']')) == NULL) {
+ LOG(log_error, logtype_dsi, "tokenize_ip_port: malformed ipv6 address %s\n", ipurl);
+ EC_FAIL;
+ }
+ *s = '\0';
+ /* address now points to the ipv6 address without [] */
+
+ if (s[1] == ':') {
+ /* [ipv6]:port */
+ EC_NULL( *port = strdup(s + 2) );
+ } else {
+ /* [ipv6] */
+ *port = NULL;
+ }
+
+EC_CLEANUP:
+ if (p)
+ free(p);
+ EC_EXIT;
+}
+
+/**
+ * Allocate and initialize atalk socket event struct
+ **/
+struct asev *asev_init(int max)
+{
+ struct asev *asev = calloc(1, sizeof(struct asev));
+
+ if (asev == NULL) {
+ return NULL;
+ }
+
+ /* Initialize with space for all possibly active fds */
+ asev->fdset = calloc(max, sizeof(struct pollfd));
+ asev->data = calloc(max, sizeof(struct asev_data));
+
+ if (asev->fdset == NULL || asev->data == NULL) {
+ free(asev->fdset);
+ free(asev->data);
+ free(asev);
+ return NULL;
+ }
+
+ asev->max = max;
+ asev->used = 0;
+
+ return asev;
+}
+
+/**
+ * Add a fd to a dynamic pollfd array and associated data array
+ *
+ * This uses an additional array of struct polldata which stores type
+ * information (enum fdtype) and a pointer to anciliary user data.
+ **/
+bool asev_add_fd(struct asev *asev,
+ int fd,
+ enum asev_fdtype fdtype,
+ void *private)
+{
+ if (asev == NULL) {
+ return false;
+ }
+
+ if (!(asev->used < asev->max)) {
+ return false;
+ }
+
+ asev->fdset[asev->used].fd = fd;
+ asev->fdset[asev->used].events = POLLIN;
+ asev->data[asev->used].fdtype = fdtype;
+ asev->data[asev->used].private = private;
+ asev->used++;
+
+ return true;
+}
+
+/**
+ * Remove fd from asev
+ *
+ * @returns true if the fd was deleted, otherwise false
+ **/
+bool asev_del_fd(struct asev *asev, int fd)
+{
+ int i;
+ int numafter;
+
+ if (asev == NULL) {
+ return false;
+ }
+
+ if (asev->used == 0) {
+ LOG(log_error, logtype_cnid, "asev_del_fd: empty");
+ return false;
+ }
+
+ for (i = 0; i < asev->used; i++) {
+ /*
+ * Scan the array for a matching fd
+ */
+ if (asev->fdset[i].fd == fd) {
+ /*
+ * found fd
+ */
+ if ((i + 1) == asev->used) {
+ /*
+ * it's the last (or only) array element, simply null it
+ */
+ asev->fdset[i].fd = -1;
+ asev->data[i].fdtype = 0;
+ asev->data[i].private = NULL;
+ } else {
+ /*
+ * Move down by one all subsequent elements
+ */
+ numafter = asev->used - (i + 1);
+ memmove(&asev->fdset[i], &asev->fdset[i+1],
+ numafter * sizeof(struct pollfd));
+ memmove(&asev->data[i], &asev->data[i+1],
+ numafter * sizeof(struct asev_data));
+ }
+ asev->used--;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+/* 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