-/*
+/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Tim Potter 2000-2001
-
+ Copyright (C) Jeremy Allison 1992-2007
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
-/* the last IP received from */
-struct in_addr lastip;
+/*******************************************************************
+ Map a text hostname or IP address (IPv4 or IPv6) into a
+ struct sockaddr_storage.
+******************************************************************/
+
+bool interpret_string_addr(struct sockaddr_storage *pss,
+ const char *str,
+ int flags)
+{
+ struct addrinfo *res = NULL;
+#if defined(HAVE_IPV6)
+ char addr[INET6_ADDRSTRLEN];
+ unsigned int scope_id = 0;
+
+ if (strchr_m(str, ':')) {
+ char *p = strchr_m(str, '%');
+
+ /*
+ * Cope with link-local.
+ * This is IP:v6:addr%ifname.
+ */
+
+ if (p && (p > str) && ((scope_id = if_nametoindex(p+1)) != 0)) {
+ strlcpy(addr, str,
+ MIN(PTR_DIFF(p,str)+1,
+ sizeof(addr)));
+ str = addr;
+ }
+ }
+#endif
+
+ zero_addr(pss);
+
+ if (!interpret_string_addr_internal(&res, str, flags|AI_ADDRCONFIG)) {
+ return false;
+ }
+ if (!res) {
+ return false;
+ }
+ /* Copy the first sockaddr. */
+ memcpy(pss, res->ai_addr, res->ai_addrlen);
+
+#if defined(HAVE_IPV6)
+ if (pss->ss_family == AF_INET6 && scope_id) {
+ struct sockaddr_in6 *ps6 = (struct sockaddr_in6 *)pss;
+ if (IN6_IS_ADDR_LINKLOCAL(&ps6->sin6_addr) &&
+ ps6->sin6_scope_id == 0) {
+ ps6->sin6_scope_id = scope_id;
+ }
+ }
+#endif
+
+ freeaddrinfo(res);
+ return true;
+}
+
+/*******************************************************************
+ Set an address to INADDR_ANY.
+******************************************************************/
+
+void zero_addr(struct sockaddr_storage *pss)
+{
+ memset(pss, '\0', sizeof(*pss));
+ /* Ensure we're at least a valid sockaddr-storage. */
+ pss->ss_family = AF_INET;
+}
+
+/****************************************************************************
+ Get a port number in host byte order from a sockaddr_storage.
+****************************************************************************/
+
+uint16_t get_sockaddr_port(const struct sockaddr_storage *pss)
+{
+ uint16_t port = 0;
+
+ if (pss->ss_family != AF_INET) {
+#if defined(HAVE_IPV6)
+ /* IPv6 */
+ const struct sockaddr_in6 *sa6 =
+ (const struct sockaddr_in6 *)pss;
+ port = ntohs(sa6->sin6_port);
+#endif
+ } else {
+ const struct sockaddr_in *sa =
+ (const struct sockaddr_in *)pss;
+ port = ntohs(sa->sin_port);
+ }
+ return port;
+}
+
+/****************************************************************************
+ Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
+****************************************************************************/
+
+static char *print_sockaddr_len(char *dest,
+ size_t destlen,
+ const struct sockaddr *psa,
+ socklen_t psalen)
+{
+ if (destlen > 0) {
+ dest[0] = '\0';
+ }
+ (void)sys_getnameinfo(psa,
+ psalen,
+ dest, destlen,
+ NULL, 0,
+ NI_NUMERICHOST);
+ return dest;
+}
+
+/****************************************************************************
+ Print out an IPv4 or IPv6 address from a struct sockaddr_storage.
+****************************************************************************/
+
+char *print_sockaddr(char *dest,
+ size_t destlen,
+ const struct sockaddr_storage *psa)
+{
+ return print_sockaddr_len(dest, destlen, (struct sockaddr *)psa,
+ sizeof(struct sockaddr_storage));
+}
+
+/****************************************************************************
+ Print out a canonical IPv4 or IPv6 address from a struct sockaddr_storage.
+****************************************************************************/
+
+char *print_canonical_sockaddr(TALLOC_CTX *ctx,
+ const struct sockaddr_storage *pss)
+{
+ char addr[INET6_ADDRSTRLEN];
+ char *dest = NULL;
+ int ret;
+
+ /* Linux getnameinfo() man pages says port is unitialized if
+ service name is NULL. */
+
+ ret = sys_getnameinfo((const struct sockaddr *)pss,
+ sizeof(struct sockaddr_storage),
+ addr, sizeof(addr),
+ NULL, 0,
+ NI_NUMERICHOST);
+ if (ret != 0) {
+ return NULL;
+ }
+
+ if (pss->ss_family != AF_INET) {
+#if defined(HAVE_IPV6)
+ dest = talloc_asprintf(ctx, "[%s]", addr);
+#else
+ return NULL;
+#endif
+ } else {
+ dest = talloc_asprintf(ctx, "%s", addr);
+ }
+
+ return dest;
+}
+
+/****************************************************************************
+ Return the string of an IP address (IPv4 or IPv6).
+****************************************************************************/
+
+static const char *get_socket_addr(int fd, char *addr_buf, size_t addr_len)
+{
+ struct sockaddr_storage sa;
+ socklen_t length = sizeof(sa);
+
+ /* Ok, returning a hard coded IPv4 address
+ * is bogus, but it's just as bogus as a
+ * zero IPv6 address. No good choice here.
+ */
+
+ strlcpy(addr_buf, "0.0.0.0", addr_len);
+
+ if (fd == -1) {
+ return addr_buf;
+ }
-/* the last port received from */
-int lastport=0;
+ if (getsockname(fd, (struct sockaddr *)&sa, &length) < 0) {
+ DEBUG(0,("getsockname failed. Error was %s\n",
+ strerror(errno) ));
+ return addr_buf;
+ }
-int smb_read_error = 0;
+ return print_sockaddr_len(addr_buf, addr_len, (struct sockaddr *)&sa, length);
+}
+
+#if 0
+/* Not currently used. JRA. */
+/****************************************************************************
+ Return the port number we've bound to on a socket.
+****************************************************************************/
+
+static int get_socket_port(int fd)
+{
+ struct sockaddr_storage sa;
+ socklen_t length = sizeof(sa);
+
+ if (fd == -1) {
+ return -1;
+ }
+
+ if (getsockname(fd, (struct sockaddr *)&sa, &length) < 0) {
+ DEBUG(0,("getpeername failed. Error was %s\n",
+ strerror(errno) ));
+ return -1;
+ }
+
+#if defined(HAVE_IPV6)
+ if (sa.ss_family == AF_INET6) {
+ return ntohs(((struct sockaddr_in6 *)&sa)->sin6_port);
+ }
+#endif
+ if (sa.ss_family == AF_INET) {
+ return ntohs(((struct sockaddr_in *)&sa)->sin_port);
+ }
+ return -1;
+}
+#endif
+
+void set_sockaddr_port(struct sockaddr_storage *psa, uint16 port)
+{
+#if defined(HAVE_IPV6)
+ if (psa->ss_family == AF_INET6) {
+ ((struct sockaddr_in6 *)psa)->sin6_port = htons(port);
+ }
+#endif
+ if (psa->ss_family == AF_INET) {
+ ((struct sockaddr_in *)psa)->sin_port = htons(port);
+ }
+}
+
+const char *client_name(int fd)
+{
+ return get_peer_name(fd,false);
+}
+
+const char *client_addr(int fd, char *addr, size_t addrlen)
+{
+ return get_peer_addr(fd,addr,addrlen);
+}
+
+const char *client_socket_addr(int fd, char *addr, size_t addr_len)
+{
+ return get_socket_addr(fd, addr, addr_len);
+}
+
+#if 0
+/* Not currently used. JRA. */
+int client_socket_port(int fd)
+{
+ return get_socket_port(fd);
+}
+#endif
+
+/****************************************************************************
+ Accessor functions to make thread-safe code easier later...
+****************************************************************************/
+
+void set_smb_read_error(enum smb_read_errors *pre,
+ enum smb_read_errors newerr)
+{
+ if (pre) {
+ *pre = newerr;
+ }
+}
+
+void cond_set_smb_read_error(enum smb_read_errors *pre,
+ enum smb_read_errors newerr)
+{
+ if (pre && *pre == SMB_READ_OK) {
+ *pre = newerr;
+ }
+}
/****************************************************************************
Determine if a file descriptor is in fact a socket.
****************************************************************************/
-BOOL is_a_socket(int fd)
+bool is_a_socket(int fd)
{
- int v,l;
+ int v;
+ socklen_t l;
l = sizeof(int);
return(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&v, &l) == 0);
}
} smb_socket_option;
static const smb_socket_option socket_options[] = {
- {"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL},
- {"SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR, 0, OPT_BOOL},
- {"SO_BROADCAST", SOL_SOCKET, SO_BROADCAST, 0, OPT_BOOL},
+ {"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL},
+ {"SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR, 0, OPT_BOOL},
+ {"SO_BROADCAST", SOL_SOCKET, SO_BROADCAST, 0, OPT_BOOL},
#ifdef TCP_NODELAY
- {"TCP_NODELAY", IPPROTO_TCP, TCP_NODELAY, 0, OPT_BOOL},
+ {"TCP_NODELAY", IPPROTO_TCP, TCP_NODELAY, 0, OPT_BOOL},
+#endif
+#ifdef TCP_KEEPCNT
+ {"TCP_KEEPCNT", IPPROTO_TCP, TCP_KEEPCNT, 0, OPT_INT},
+#endif
+#ifdef TCP_KEEPIDLE
+ {"TCP_KEEPIDLE", IPPROTO_TCP, TCP_KEEPIDLE, 0, OPT_INT},
+#endif
+#ifdef TCP_KEEPINTVL
+ {"TCP_KEEPINTVL", IPPROTO_TCP, TCP_KEEPINTVL, 0, OPT_INT},
#endif
#ifdef IPTOS_LOWDELAY
- {"IPTOS_LOWDELAY", IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY, OPT_ON},
+ {"IPTOS_LOWDELAY", IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY, OPT_ON},
#endif
#ifdef IPTOS_THROUGHPUT
- {"IPTOS_THROUGHPUT", IPPROTO_IP, IP_TOS, IPTOS_THROUGHPUT, OPT_ON},
+ {"IPTOS_THROUGHPUT", IPPROTO_IP, IP_TOS, IPTOS_THROUGHPUT, OPT_ON},
#endif
#ifdef SO_REUSEPORT
- {"SO_REUSEPORT", SOL_SOCKET, SO_REUSEPORT, 0, OPT_BOOL},
+ {"SO_REUSEPORT", SOL_SOCKET, SO_REUSEPORT, 0, OPT_BOOL},
#endif
#ifdef SO_SNDBUF
- {"SO_SNDBUF", SOL_SOCKET, SO_SNDBUF, 0, OPT_INT},
+ {"SO_SNDBUF", SOL_SOCKET, SO_SNDBUF, 0, OPT_INT},
#endif
#ifdef SO_RCVBUF
- {"SO_RCVBUF", SOL_SOCKET, SO_RCVBUF, 0, OPT_INT},
+ {"SO_RCVBUF", SOL_SOCKET, SO_RCVBUF, 0, OPT_INT},
#endif
#ifdef SO_SNDLOWAT
- {"SO_SNDLOWAT", SOL_SOCKET, SO_SNDLOWAT, 0, OPT_INT},
+ {"SO_SNDLOWAT", SOL_SOCKET, SO_SNDLOWAT, 0, OPT_INT},
#endif
#ifdef SO_RCVLOWAT
- {"SO_RCVLOWAT", SOL_SOCKET, SO_RCVLOWAT, 0, OPT_INT},
+ {"SO_RCVLOWAT", SOL_SOCKET, SO_RCVLOWAT, 0, OPT_INT},
#endif
#ifdef SO_SNDTIMEO
- {"SO_SNDTIMEO", SOL_SOCKET, SO_SNDTIMEO, 0, OPT_INT},
+ {"SO_SNDTIMEO", SOL_SOCKET, SO_SNDTIMEO, 0, OPT_INT},
#endif
#ifdef SO_RCVTIMEO
- {"SO_RCVTIMEO", SOL_SOCKET, SO_RCVTIMEO, 0, OPT_INT},
+ {"SO_RCVTIMEO", SOL_SOCKET, SO_RCVTIMEO, 0, OPT_INT},
+#endif
+#ifdef TCP_FASTACK
+ {"TCP_FASTACK", IPPROTO_TCP, TCP_FASTACK, 0, OPT_INT},
#endif
{NULL,0,0,0,0}};
static void print_socket_options(int s)
{
- int value, vlen = 4;
+ int value;
+ socklen_t vlen = 4;
const smb_socket_option *p = &socket_options[0];
- /* wrapped in if statement to prevent streams leak in SCO Openserver 5.0 */
+ /* wrapped in if statement to prevent streams
+ * leak in SCO Openserver 5.0 */
/* reported on samba-technical --jerry */
if ( DEBUGLEVEL >= 5 ) {
- for (; p->name != NULL; p++) {
- if (getsockopt(s, p->level, p->option, (void *)&value, &vlen) == -1) {
- DEBUG(5,("Could not test socket option %s.\n", p->name));
- } else {
- DEBUG(5,("socket option %s = %d\n",p->name,value));
+ for (; p->name != NULL; p++) {
+ if (getsockopt(s, p->level, p->option,
+ (void *)&value, &vlen) == -1) {
+ DEBUG(5,("Could not test socket option %s.\n",
+ p->name));
+ } else {
+ DEBUG(5,("socket option %s = %d\n",
+ p->name,value));
}
}
}
void set_socket_options(int fd, const char *options)
{
- fstring tok;
+ TALLOC_CTX *ctx = talloc_stackframe();
+ char *tok;
- while (next_token(&options,tok," \t,", sizeof(tok))) {
+ while (next_token_talloc(ctx, &options, &tok," \t,")) {
int ret=0,i;
int value = 1;
char *p;
- BOOL got_value = False;
+ bool got_value = false;
if ((p = strchr_m(tok,'='))) {
*p = 0;
value = atoi(p+1);
- got_value = True;
+ got_value = true;
}
for (i=0;socket_options[i].name;i++)
case OPT_BOOL:
case OPT_INT:
ret = setsockopt(fd,socket_options[i].level,
- socket_options[i].option,(char *)&value,sizeof(int));
+ socket_options[i].option,
+ (char *)&value,sizeof(int));
break;
case OPT_ON:
if (got_value)
- DEBUG(0,("syntax error - %s does not take a value\n",tok));
+ DEBUG(0,("syntax error - %s "
+ "does not take a value\n",tok));
{
int on = socket_options[i].value;
ret = setsockopt(fd,socket_options[i].level,
- socket_options[i].option,(char *)&on,sizeof(int));
+ socket_options[i].option,
+ (char *)&on,sizeof(int));
}
- break;
+ break;
+ }
+
+ if (ret != 0) {
+ /* be aware that some systems like Solaris return
+ * EINVAL to a setsockopt() call when the client
+ * sent a RST previously - no need to worry */
+ DEBUG(2,("Failed to set socket option %s (Error %s)\n",
+ tok, strerror(errno) ));
}
-
- if (ret != 0)
- DEBUG(0,("Failed to set socket option %s (Error %s)\n",tok, strerror(errno) ));
}
+ TALLOC_FREE(ctx);
print_socket_options(fd);
}
Read from a socket.
****************************************************************************/
-ssize_t read_udp_socket(int fd,char *buf,size_t len)
+ssize_t read_udp_v4_socket(int fd,
+ char *buf,
+ size_t len,
+ struct sockaddr_storage *psa)
{
ssize_t ret;
- struct sockaddr_in sock;
- socklen_t socklen = sizeof(sock);
+ socklen_t socklen = sizeof(*psa);
+ struct sockaddr_in *si = (struct sockaddr_in *)psa;
+
+ memset((char *)psa,'\0',socklen);
- memset((char *)&sock,'\0',socklen);
- memset((char *)&lastip,'\0',sizeof(lastip));
- ret = (ssize_t)sys_recvfrom(fd,buf,len,0,(struct sockaddr *)&sock,&socklen);
+ ret = (ssize_t)sys_recvfrom(fd,buf,len,0,
+ (struct sockaddr *)psa,&socklen);
if (ret <= 0) {
- DEBUG(2,("read socket failed. ERRNO=%s\n",strerror(errno)));
- return(0);
+ /* Don't print a low debug error for a non-blocking socket. */
+ if (errno == EAGAIN) {
+ DEBUG(10,("read_udp_v4_socket: returned EAGAIN\n"));
+ } else {
+ DEBUG(2,("read_udp_v4_socket: failed. errno=%s\n",
+ strerror(errno)));
+ }
+ return 0;
}
- lastip = sock.sin_addr;
- lastport = ntohs(sock.sin_port);
+ if (psa->ss_family != AF_INET) {
+ DEBUG(2,("read_udp_v4_socket: invalid address family %d "
+ "(not IPv4)\n", (int)psa->ss_family));
+ return 0;
+ }
- DEBUG(10,("read_udp_socket: lastip %s lastport %d read: %d\n",
- inet_ntoa(lastip), lastport, ret));
+ DEBUG(10,("read_udp_v4_socket: ip %s port %d read: %lu\n",
+ inet_ntoa(si->sin_addr),
+ si->sin_port,
+ (unsigned long)ret));
- return(ret);
+ return ret;
}
/****************************************************************************
time_out = timeout in milliseconds
****************************************************************************/
-ssize_t read_socket_with_timeout(int fd,char *buf,size_t mincnt,size_t maxcnt,unsigned int time_out)
+NTSTATUS read_socket_with_timeout(int fd, char *buf,
+ size_t mincnt, size_t maxcnt,
+ unsigned int time_out,
+ size_t *size_ret)
{
fd_set fds;
int selrtn;
ssize_t readret;
size_t nread = 0;
struct timeval timeout;
-
+ char addr[INET6_ADDRSTRLEN];
+
/* just checking .... */
if (maxcnt <= 0)
- return(0);
-
- smb_read_error = 0;
-
+ return NT_STATUS_OK;
+
/* Blocking read */
- if (time_out <= 0) {
- if (mincnt == 0) mincnt = maxcnt;
-
+ if (time_out == 0) {
+ if (mincnt == 0) {
+ mincnt = maxcnt;
+ }
+
while (nread < mincnt) {
readret = sys_read(fd, buf + nread, maxcnt - nread);
-
+
if (readret == 0) {
- DEBUG(5,("read_socket_with_timeout: blocking read. EOF from client.\n"));
- smb_read_error = READ_EOF;
- return -1;
+ DEBUG(5,("read_socket_with_timeout: "
+ "blocking read. EOF from client.\n"));
+ return NT_STATUS_END_OF_FILE;
}
-
+
if (readret == -1) {
- DEBUG(0,("read_socket_with_timeout: read error = %s.\n", strerror(errno) ));
- smb_read_error = READ_ERROR;
- return -1;
+ if (fd == get_client_fd()) {
+ /* Try and give an error message
+ * saying what client failed. */
+ DEBUG(0,("read_socket_with_timeout: "
+ "client %s read error = %s.\n",
+ get_peer_addr(fd,addr,sizeof(addr)),
+ strerror(errno) ));
+ } else {
+ DEBUG(0,("read_socket_with_timeout: "
+ "read error = %s.\n",
+ strerror(errno) ));
+ }
+ return map_nt_error_from_unix(errno);
}
nread += readret;
}
- return((ssize_t)nread);
+ goto done;
}
-
+
/* Most difficult - timeout read */
- /* If this is ever called on a disk file and
+ /* If this is ever called on a disk file and
mincnt is greater then the filesize then
- system performance will suffer severely as
+ system performance will suffer severely as
select always returns true on disk files */
-
+
/* Set initial timeout */
timeout.tv_sec = (time_t)(time_out / 1000);
timeout.tv_usec = (long)(1000 * (time_out % 1000));
-
- for (nread=0; nread < mincnt; ) {
+
+ for (nread=0; nread < mincnt; ) {
FD_ZERO(&fds);
FD_SET(fd,&fds);
-
+
selrtn = sys_select_intr(fd+1,&fds,NULL,NULL,&timeout);
-
+
/* Check if error */
if (selrtn == -1) {
/* something is wrong. Maybe the socket is dead? */
- DEBUG(0,("read_socket_with_timeout: timeout read. select error = %s.\n", strerror(errno) ));
- smb_read_error = READ_ERROR;
- return -1;
+ if (fd == get_client_fd()) {
+ /* Try and give an error message saying
+ * what client failed. */
+ DEBUG(0,("read_socket_with_timeout: timeout "
+ "read for client %s. select error = %s.\n",
+ get_peer_addr(fd,addr,sizeof(addr)),
+ strerror(errno) ));
+ } else {
+ DEBUG(0,("read_socket_with_timeout: timeout "
+ "read. select error = %s.\n",
+ strerror(errno) ));
+ }
+ return map_nt_error_from_unix(errno);
}
-
+
/* Did we timeout ? */
if (selrtn == 0) {
- DEBUG(10,("read_socket_with_timeout: timeout read. select timed out.\n"));
- smb_read_error = READ_TIMEOUT;
- return -1;
+ DEBUG(10,("read_socket_with_timeout: timeout read. "
+ "select timed out.\n"));
+ return NT_STATUS_IO_TIMEOUT;
}
-
+
readret = sys_read(fd, buf+nread, maxcnt-nread);
-
+
if (readret == 0) {
/* we got EOF on the file descriptor */
- DEBUG(5,("read_socket_with_timeout: timeout read. EOF from client.\n"));
- smb_read_error = READ_EOF;
- return -1;
+ DEBUG(5,("read_socket_with_timeout: timeout read. "
+ "EOF from client.\n"));
+ return NT_STATUS_END_OF_FILE;
}
-
+
if (readret == -1) {
/* the descriptor is probably dead */
- DEBUG(0,("read_socket_with_timeout: timeout read. read error = %s.\n", strerror(errno) ));
- smb_read_error = READ_ERROR;
- return -1;
+ if (fd == get_client_fd()) {
+ /* Try and give an error message
+ * saying what client failed. */
+ DEBUG(0,("read_socket_with_timeout: timeout "
+ "read to client %s. read error = %s.\n",
+ get_peer_addr(fd,addr,sizeof(addr)),
+ strerror(errno) ));
+ } else {
+ DEBUG(0,("read_socket_with_timeout: timeout "
+ "read. read error = %s.\n",
+ strerror(errno) ));
+ }
+ return map_nt_error_from_unix(errno);
}
-
+
nread += readret;
}
-
- /* Return the number we got */
- return (ssize_t)nread;
-}
-/****************************************************************************
- Read data from the client, reading exactly N bytes.
-****************************************************************************/
-
-ssize_t read_data(int fd,char *buffer,size_t N)
-{
- ssize_t ret;
- size_t total=0;
-
- smb_read_error = 0;
-
- while (total < N) {
- ret = sys_read(fd,buffer + total,N - total);
-
- if (ret == 0) {
- DEBUG(10,("read_data: read of %d returned 0. Error = %s\n", (int)(N - total), strerror(errno) ));
- smb_read_error = READ_EOF;
- return 0;
- }
-
- if (ret == -1) {
- DEBUG(0,("read_data: read failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
- smb_read_error = READ_ERROR;
- return -1;
- }
- total += ret;
+ done:
+ /* Return the number we got */
+ if (size_ret) {
+ *size_ret = nread;
}
- return (ssize_t)total;
+ return NT_STATUS_OK;
}
/****************************************************************************
- Read data from a socket, reading exactly N bytes.
+ Read data from the client, reading exactly N bytes.
****************************************************************************/
-static ssize_t read_socket_data(int fd,char *buffer,size_t N)
+NTSTATUS read_data(int fd, char *buffer, size_t N)
{
- ssize_t ret;
- size_t total=0;
-
- smb_read_error = 0;
-
- while (total < N) {
- ret = sys_read(fd,buffer + total,N - total);
-
- if (ret == 0) {
- DEBUG(10,("read_socket_data: recv of %d returned 0. Error = %s\n", (int)(N - total), strerror(errno) ));
- smb_read_error = READ_EOF;
- return 0;
- }
-
- if (ret == -1) {
- DEBUG(0,("read_socket_data: recv failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
- smb_read_error = READ_ERROR;
- return -1;
- }
- total += ret;
- }
- return (ssize_t)total;
+ return read_socket_with_timeout(fd, buffer, N, N, 0, NULL);
}
/****************************************************************************
Write data to a fd.
****************************************************************************/
-ssize_t write_data(int fd,char *buffer,size_t N)
+ssize_t write_data(int fd, const char *buffer, size_t N)
{
size_t total=0;
ssize_t ret;
+ char addr[INET6_ADDRSTRLEN];
while (total < N) {
ret = sys_write(fd,buffer + total,N - total);
if (ret == -1) {
- DEBUG(0,("write_data: write failure. Error = %s\n", strerror(errno) ));
+ if (fd == get_client_fd()) {
+ /* Try and give an error message saying
+ * what client failed. */
+ DEBUG(0,("write_data: write failure in "
+ "writing to client %s. Error %s\n",
+ get_peer_addr(fd,addr,sizeof(addr)),
+ strerror(errno) ));
+ } else {
+ DEBUG(0,("write_data: write failure. "
+ "Error = %s\n", strerror(errno) ));
+ }
return -1;
}
- if (ret == 0)
- return total;
-
- total += ret;
- }
- return (ssize_t)total;
-}
-
-/****************************************************************************
- Write data to a socket - use send rather than write.
-****************************************************************************/
-
-static ssize_t write_socket_data(int fd,char *buffer,size_t N)
-{
- size_t total=0;
- ssize_t ret;
-
- while (total < N) {
- ret = sys_send(fd,buffer + total,N - total,0);
- if (ret == -1) {
- DEBUG(0,("write_socket_data: write failure. Error = %s\n", strerror(errno) ));
- return -1;
- }
- if (ret == 0)
+ if (ret == 0) {
return total;
+ }
total += ret;
}
return (ssize_t)total;
}
-/****************************************************************************
- Write to a socket.
-****************************************************************************/
-
-ssize_t write_socket(int fd,char *buf,size_t len)
-{
- ssize_t ret=0;
-
- DEBUG(6,("write_socket(%d,%d)\n",fd,(int)len));
- ret = write_socket_data(fd,buf,len);
-
- DEBUG(6,("write_socket(%d,%d) wrote %d\n",fd,(int)len,(int)ret));
- if(ret <= 0)
- DEBUG(0,("write_socket: Error writing %d bytes to socket %d: ERRNO = %s\n",
- (int)len, fd, strerror(errno) ));
-
- return(ret);
-}
-
/****************************************************************************
Send a keepalive packet (rfc1002).
****************************************************************************/
-BOOL send_keepalive(int client)
+bool send_keepalive(int client)
{
unsigned char buf[4];
buf[0] = SMBkeepalive;
buf[1] = buf[2] = buf[3] = 0;
- return(write_socket_data(client,(char *)buf,4) == 4);
+ return(write_data(client,(char *)buf,4) == 4);
}
-
/****************************************************************************
Read 4 bytes of a smb packet and return the smb length of the packet.
Store the result in the buffer.
Timeout is in milliseconds.
****************************************************************************/
-static ssize_t read_smb_length_return_keepalive(int fd,char *inbuf,unsigned int timeout)
+NTSTATUS read_smb_length_return_keepalive(int fd, char *inbuf,
+ unsigned int timeout,
+ size_t *len)
{
- ssize_t len=0;
int msg_type;
- BOOL ok = False;
+ NTSTATUS status;
- while (!ok) {
- if (timeout > 0)
- ok = (read_socket_with_timeout(fd,inbuf,4,4,timeout) == 4);
- else
- ok = (read_socket_data(fd,inbuf,4) == 4);
+ status = read_socket_with_timeout(fd, inbuf, 4, 4, timeout, NULL);
- if (!ok)
- return(-1);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
- len = smb_len(inbuf);
- msg_type = CVAL(inbuf,0);
+ *len = smb_len(inbuf);
+ msg_type = CVAL(inbuf,0);
- if (msg_type == SMBkeepalive)
- DEBUG(5,("Got keepalive packet\n"));
+ if (msg_type == SMBkeepalive) {
+ DEBUG(5,("Got keepalive packet\n"));
}
- DEBUG(10,("got smb length of %d\n",len));
+ DEBUG(10,("got smb length of %lu\n",(unsigned long)(*len)));
- return(len);
+ return NT_STATUS_OK;
}
/****************************************************************************
Timeout is in milliseconds.
****************************************************************************/
-ssize_t read_smb_length(int fd,char *inbuf,unsigned int timeout)
+NTSTATUS read_smb_length(int fd, char *inbuf, unsigned int timeout,
+ size_t *len)
{
- ssize_t len;
+ uint8_t msgtype = SMBkeepalive;
- for(;;) {
- len = read_smb_length_return_keepalive(fd, inbuf, timeout);
+ while (msgtype == SMBkeepalive) {
+ NTSTATUS status;
- if(len < 0)
- return len;
+ status = read_smb_length_return_keepalive(fd, inbuf, timeout,
+ len);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
- /* Ignore session keepalives. */
- if(CVAL(inbuf,0) != SMBkeepalive)
- break;
+ msgtype = CVAL(inbuf, 0);
}
- DEBUG(10,("read_smb_length: got smb length of %d\n",len));
+ DEBUG(10,("read_smb_length: got smb length of %lu\n",
+ (unsigned long)len));
- return len;
+ return NT_STATUS_OK;
}
/****************************************************************************
- Read an smb from a fd. Note that the buffer *MUST* be of size
- BUFFER_SIZE+SAFETY_MARGIN.
- The timeout is in milliseconds.
+ Read an smb from a fd.
+ The timeout is in milliseconds.
This function will return on receipt of a session keepalive packet.
+ maxlen is the max number of bytes to return, not including the 4 byte
+ length. If zero it means buflen limit.
Doesn't check the MAC on signed packets.
****************************************************************************/
-BOOL receive_smb_raw(int fd,char *buffer, unsigned int timeout)
+NTSTATUS receive_smb_raw(int fd, char *buffer, size_t buflen, unsigned int timeout,
+ size_t maxlen, size_t *p_len)
{
- ssize_t len,ret;
-
- smb_read_error = 0;
-
- memset(buffer,'\0',smb_size + 100);
-
- len = read_smb_length_return_keepalive(fd,buffer,timeout);
- if (len < 0) {
- DEBUG(10,("receive_smb_raw: length < 0!\n"));
+ size_t len;
+ NTSTATUS status;
- /*
- * Correct fix. smb_read_error may have already been
- * set. Only set it here if not already set. Global
- * variables still suck :-). JRA.
- */
+ status = read_smb_length_return_keepalive(fd,buffer,timeout,&len);
- if (smb_read_error == 0)
- smb_read_error = READ_ERROR;
- return False;
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("receive_smb_raw: %s!\n", nt_errstr(status)));
+ return status;
}
- /*
- * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes
- * of header. Don't print the error if this fits.... JRA.
- */
-
- if (len > (BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE)) {
- DEBUG(0,("Invalid packet length! (%d bytes).\n",len));
- if (len > BUFFER_SIZE + (SAFETY_MARGIN/2)) {
-
- /*
- * Correct fix. smb_read_error may have already been
- * set. Only set it here if not already set. Global
- * variables still suck :-). JRA.
- */
-
- if (smb_read_error == 0)
- smb_read_error = READ_ERROR;
- return False;
- }
+ if (len > buflen) {
+ DEBUG(0,("Invalid packet length! (%lu bytes).\n",
+ (unsigned long)len));
+ return NT_STATUS_INVALID_PARAMETER;
}
if(len > 0) {
- ret = read_socket_data(fd,buffer+4,len);
- if (ret != len) {
- if (smb_read_error == 0)
- smb_read_error = READ_ERROR;
- return False;
+ if (maxlen) {
+ len = MIN(len,maxlen);
}
- }
- return True;
-}
+ status = read_socket_with_timeout(
+ fd, buffer+4, len, len, timeout, &len);
-/****************************************************************************
- Wrapper for receive_smb_raw().
- Checks the MAC on signed packets.
-****************************************************************************/
-
-BOOL receive_smb(int fd,char *buffer, unsigned int timeout)
-{
- if (!receive_smb_raw(fd, buffer, timeout)) {
- return False;
- }
-
- /* Check the incoming SMB signature. */
- if (!srv_check_sign_mac(buffer)) {
- DEBUG(0, ("receive_smb: SMB Signature verification failed on incoming packet!\n"));
- if (smb_read_error == 0)
- smb_read_error = READ_BAD_SIG;
- return False;
- };
-
- return(True);
-}
-
-/****************************************************************************
- Send an smb to a fd.
-****************************************************************************/
-
-BOOL send_smb(int fd,char *buffer)
-{
- size_t len;
- size_t nwritten=0;
- ssize_t ret;
-
- /* Sign the outgoing packet if required. */
- srv_calculate_sign_mac(buffer);
-
- len = smb_len(buffer) + 4;
-
- while (nwritten < len) {
- ret = write_socket(fd,buffer+nwritten,len - nwritten);
- if (ret <= 0) {
- DEBUG(0,("Error writing %d bytes to client. %d. (%s)\n",
- (int)len,(int)ret, strerror(errno) ));
- return False;
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
- nwritten += ret;
+
+ /* not all of samba3 properly checks for packet-termination
+ * of strings. This ensures that we don't run off into
+ * empty space. */
+ SSVAL(buffer+4,len, 0);
}
- return True;
+ *p_len = len;
+ return NT_STATUS_OK;
}
/****************************************************************************
Open a socket of the specified type, port, and address for incoming data.
****************************************************************************/
-int open_socket_in( int type, int port, int dlevel, uint32 socket_addr, BOOL rebind )
+int open_socket_in(int type,
+ uint16_t port,
+ int dlevel,
+ const struct sockaddr_storage *psock,
+ bool rebind)
{
- struct sockaddr_in sock;
+ struct sockaddr_storage sock;
int res;
+ socklen_t slen = sizeof(struct sockaddr_in);
- memset( (char *)&sock, '\0', sizeof(sock) );
+ sock = *psock;
-#ifdef HAVE_SOCK_SIN_LEN
- sock.sin_len = sizeof(sock);
+#if defined(HAVE_IPV6)
+ if (sock.ss_family == AF_INET6) {
+ ((struct sockaddr_in6 *)&sock)->sin6_port = htons(port);
+ slen = sizeof(struct sockaddr_in6);
+ }
#endif
- sock.sin_port = htons( port );
- sock.sin_family = AF_INET;
- sock.sin_addr.s_addr = socket_addr;
+ if (sock.ss_family == AF_INET) {
+ ((struct sockaddr_in *)&sock)->sin_port = htons(port);
+ }
- res = socket( AF_INET, type, 0 );
+ res = socket(sock.ss_family, type, 0 );
if( res == -1 ) {
if( DEBUGLVL(0) ) {
dbgtext( "open_socket_in(): socket() call failed: " );
/* This block sets/clears the SO_REUSEADDR and possibly SO_REUSEPORT. */
{
int val = rebind ? 1 : 0;
- if( setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)) == -1 ) {
+ if( setsockopt(res,SOL_SOCKET,SO_REUSEADDR,
+ (char *)&val,sizeof(val)) == -1 ) {
if( DEBUGLVL( dlevel ) ) {
dbgtext( "open_socket_in(): setsockopt: " );
- dbgtext( "SO_REUSEADDR = %s ", val?"True":"False" );
+ dbgtext( "SO_REUSEADDR = %s ",
+ val?"true":"false" );
dbgtext( "on port %d failed ", port );
dbgtext( "with error = %s\n", strerror(errno) );
}
}
#ifdef SO_REUSEPORT
- if( setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val)) == -1 ) {
+ if( setsockopt(res,SOL_SOCKET,SO_REUSEPORT,
+ (char *)&val,sizeof(val)) == -1 ) {
if( DEBUGLVL( dlevel ) ) {
dbgtext( "open_socket_in(): setsockopt: ");
- dbgtext( "SO_REUSEPORT = %s ", val?"True":"False" );
- dbgtext( "on port %d failed ", port );
- dbgtext( "with error = %s\n", strerror(errno) );
+ dbgtext( "SO_REUSEPORT = %s ",
+ val?"true":"false");
+ dbgtext( "on port %d failed ", port);
+ dbgtext( "with error = %s\n", strerror(errno));
}
}
#endif /* SO_REUSEPORT */
}
/* now we've got a socket - we need to bind it */
- if( bind( res, (struct sockaddr *)&sock, sizeof(sock) ) == -1 ) {
- if( DEBUGLVL(dlevel) && (port == SMB_PORT1 || port == SMB_PORT2 || port == NMB_PORT) ) {
- dbgtext( "bind failed on port %d ", port );
- dbgtext( "socket_addr = %s.\n", inet_ntoa( sock.sin_addr ) );
- dbgtext( "Error = %s\n", strerror(errno) );
+ if (bind(res, (struct sockaddr *)&sock, slen) == -1 ) {
+ if( DEBUGLVL(dlevel) && (port == SMB_PORT1 ||
+ port == SMB_PORT2 || port == NMB_PORT) ) {
+ char addr[INET6_ADDRSTRLEN];
+ print_sockaddr(addr, sizeof(addr),
+ &sock);
+ dbgtext( "bind failed on port %d ", port);
+ dbgtext( "socket_addr = %s.\n", addr);
+ dbgtext( "Error = %s\n", strerror(errno));
}
- close( res );
- return( -1 );
+ close(res);
+ return -1;
}
DEBUG( 10, ( "bind succeeded on port %d\n", port ) );
-
return( res );
}
Create an outgoing socket. timeout is in milliseconds.
**************************************************************************/
-int open_socket_out(int type, struct in_addr *addr, int port ,int timeout)
+int open_socket_out(int type,
+ const struct sockaddr_storage *pss,
+ uint16_t port,
+ int timeout)
{
- struct sockaddr_in sock_out;
+ char addr[INET6_ADDRSTRLEN];
+ struct sockaddr_storage sock_out = *pss;
int res,ret;
int connect_loop = 10;
int increment = 10;
/* create a socket to write to */
- res = socket(PF_INET, type, 0);
+ res = socket(pss->ss_family, type, 0);
if (res == -1) {
- DEBUG(0,("socket error\n"));
+ DEBUG(0,("socket error (%s)\n", strerror(errno)));
return -1;
}
- if (type != SOCK_STREAM)
- return(res);
-
- memset((char *)&sock_out,'\0',sizeof(sock_out));
- putip((char *)&sock_out.sin_addr,(char *)addr);
-
- sock_out.sin_port = htons( port );
- sock_out.sin_family = PF_INET;
+ if (type != SOCK_STREAM) {
+ return res;
+ }
+
+#if defined(HAVE_IPV6)
+ if (pss->ss_family == AF_INET6) {
+ struct sockaddr_in6 *psa6 = (struct sockaddr_in6 *)&sock_out;
+ psa6->sin6_port = htons(port);
+ if (psa6->sin6_scope_id == 0 &&
+ IN6_IS_ADDR_LINKLOCAL(&psa6->sin6_addr)) {
+ setup_linklocal_scope_id((struct sockaddr *)&sock_out);
+ }
+ }
+#endif
+ if (pss->ss_family == AF_INET) {
+ struct sockaddr_in *psa = (struct sockaddr_in *)&sock_out;
+ psa->sin_port = htons(port);
+ }
/* set it non-blocking */
- set_blocking(res,False);
+ set_blocking(res,false);
+
+ print_sockaddr(addr, sizeof(addr), &sock_out);
+ DEBUG(3,("Connecting to %s at port %u\n",
+ addr,
+ (unsigned int)port));
- DEBUG(3,("Connecting to %s at port %d\n",inet_ntoa(*addr),port));
-
/* and connect it to the destination */
connect_again:
- ret = connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out));
+ ret = sys_connect(res, (struct sockaddr *)&sock_out);
/* Some systems return EAGAIN when they mean EINPROGRESS */
if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
errno == EAGAIN) && (connect_loop < timeout) ) {
- msleep(connect_loop);
+ smb_msleep(connect_loop);
+ timeout -= connect_loop;
connect_loop += increment;
if (increment < 250) {
/* After 8 rounds we end up at a max of 255 msec */
if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
errno == EAGAIN)) {
- DEBUG(1,("timeout connecting to %s:%d\n",inet_ntoa(*addr),port));
+ DEBUG(1,("timeout connecting to %s:%u\n",
+ addr,
+ (unsigned int)port));
close(res);
return -1;
}
#ifdef EISCONN
-
if (ret < 0 && errno == EISCONN) {
errno = 0;
ret = 0;
if (ret < 0) {
DEBUG(2,("error connecting to %s:%d (%s)\n",
- inet_ntoa(*addr),port,strerror(errno)));
+ addr,
+ (unsigned int)port,
+ strerror(errno)));
close(res);
return -1;
}
/* set it blocking again */
- set_blocking(res,True);
+ set_blocking(res,true);
return res;
}
+/*******************************************************************
+ Create an outgoing TCP socket to the first addr that connects.
+
+ This is for simultaneous connection attempts to port 445 and 139 of a host
+ or for simultatneous connection attempts to multiple DCs at once. We return
+ a socket fd of the first successful connection.
+
+ @param[in] addrs list of Internet addresses and ports to connect to
+ @param[in] num_addrs number of address/port pairs in the addrs list
+ @param[in] timeout time after which we stop waiting for a socket connection
+ to succeed, given in milliseconds
+ @param[out] fd_index the entry in addrs which we successfully connected to
+ @param[out] fd fd of the open and connected socket
+ @return true on a successful connection, false if all connection attempts
+ failed or we timed out
+*******************************************************************/
+
+bool open_any_socket_out(struct sockaddr_storage *addrs, int num_addrs,
+ int timeout, int *fd_index, int *fd)
+{
+ int i, resulting_index, res;
+ int *sockets;
+ bool good_connect;
+
+ fd_set r_fds, wr_fds;
+ struct timeval tv;
+ int maxfd;
+
+ int connect_loop = 10000; /* 10 milliseconds */
+
+ timeout *= 1000; /* convert to microseconds */
+
+ sockets = SMB_MALLOC_ARRAY(int, num_addrs);
+
+ if (sockets == NULL)
+ return false;
+
+ resulting_index = -1;
+
+ for (i=0; i<num_addrs; i++)
+ sockets[i] = -1;
+
+ for (i=0; i<num_addrs; i++) {
+ sockets[i] = socket(addrs[i].ss_family, SOCK_STREAM, 0);
+ if (sockets[i] < 0)
+ goto done;
+ set_blocking(sockets[i], false);
+ }
+
+ connect_again:
+ good_connect = false;
+
+ for (i=0; i<num_addrs; i++) {
+ const struct sockaddr * a =
+ (const struct sockaddr *)&(addrs[i]);
+
+ if (sockets[i] == -1)
+ continue;
+
+ if (sys_connect(sockets[i], a) == 0) {
+ /* Rather unlikely as we are non-blocking, but it
+ * might actually happen. */
+ resulting_index = i;
+ goto done;
+ }
+
+ if (errno == EINPROGRESS || errno == EALREADY ||
+#ifdef EISCONN
+ errno == EISCONN ||
+#endif
+ errno == EAGAIN || errno == EINTR) {
+ /* These are the error messages that something is
+ progressing. */
+ good_connect = true;
+ } else if (errno != 0) {
+ /* There was a direct error */
+ close(sockets[i]);
+ sockets[i] = -1;
+ }
+ }
+
+ if (!good_connect) {
+ /* All of the connect's resulted in real error conditions */
+ goto done;
+ }
+
+ /* Lets see if any of the connect attempts succeeded */
+
+ maxfd = 0;
+ FD_ZERO(&wr_fds);
+ FD_ZERO(&r_fds);
+
+ for (i=0; i<num_addrs; i++) {
+ if (sockets[i] == -1)
+ continue;
+ FD_SET(sockets[i], &wr_fds);
+ FD_SET(sockets[i], &r_fds);
+ if (sockets[i]>maxfd)
+ maxfd = sockets[i];
+ }
+
+ tv.tv_sec = 0;
+ tv.tv_usec = connect_loop;
+
+ res = sys_select_intr(maxfd+1, &r_fds, &wr_fds, NULL, &tv);
+
+ if (res < 0)
+ goto done;
+
+ if (res == 0)
+ goto next_round;
+
+ for (i=0; i<num_addrs; i++) {
+
+ if (sockets[i] == -1)
+ continue;
+
+ /* Stevens, Network Programming says that if there's a
+ * successful connect, the socket is only writable. Upon an
+ * error, it's both readable and writable. */
+
+ if (FD_ISSET(sockets[i], &r_fds) &&
+ FD_ISSET(sockets[i], &wr_fds)) {
+ /* readable and writable, so it's an error */
+ close(sockets[i]);
+ sockets[i] = -1;
+ continue;
+ }
+
+ if (!FD_ISSET(sockets[i], &r_fds) &&
+ FD_ISSET(sockets[i], &wr_fds)) {
+ /* Only writable, so it's connected */
+ resulting_index = i;
+ goto done;
+ }
+ }
+
+ next_round:
+
+ timeout -= connect_loop;
+ if (timeout <= 0)
+ goto done;
+ connect_loop *= 1.5;
+ if (connect_loop > timeout)
+ connect_loop = timeout;
+ goto connect_again;
+
+ done:
+ for (i=0; i<num_addrs; i++) {
+ if (i == resulting_index)
+ continue;
+ if (sockets[i] >= 0)
+ close(sockets[i]);
+ }
+
+ if (resulting_index >= 0) {
+ *fd_index = resulting_index;
+ *fd = sockets[*fd_index];
+ set_blocking(*fd, true);
+ }
+
+ free(sockets);
+
+ return (resulting_index >= 0);
+}
/****************************************************************************
Open a connected UDP socket to host on port
**************************************************************************/
int type = SOCK_DGRAM;
struct sockaddr_in sock_out;
int res;
- struct in_addr *addr;
+ struct in_addr addr;
addr = interpret_addr2(host);
}
memset((char *)&sock_out,'\0',sizeof(sock_out));
- putip((char *)&sock_out.sin_addr,(char *)addr);
+ putip((char *)&sock_out.sin_addr,(char *)&addr);
sock_out.sin_port = htons(port);
sock_out.sin_family = PF_INET;
- if (connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out))) {
+ if (sys_connect(res,(struct sockaddr *)&sock_out)) {
close(res);
return -1;
}
return res;
}
+/*******************************************************************
+ Return the IP addr of the remote end of a socket as a string.
+ Optionally return the struct sockaddr_storage.
+ ******************************************************************/
-/* the following 3 client_*() functions are nasty ways of allowing
- some generic functions to get info that really should be hidden in
- particular modules */
-static int client_fd = -1;
-
-void client_setfd(int fd)
+static const char *get_peer_addr_internal(int fd,
+ char *addr_buf,
+ size_t addr_buf_len,
+ struct sockaddr *pss,
+ socklen_t *plength)
{
- client_fd = fd;
-}
+ struct sockaddr_storage ss;
+ socklen_t length = sizeof(ss);
-char *client_name(void)
-{
- return get_socket_name(client_fd,False);
-}
+ strlcpy(addr_buf,"0.0.0.0",addr_buf_len);
-char *client_addr(void)
-{
- return get_socket_addr(client_fd);
-}
+ if (fd == -1) {
+ return addr_buf;
+ }
-struct in_addr *client_inaddr(struct sockaddr *sa)
-{
- struct sockaddr_in *sockin = (struct sockaddr_in *) (sa);
- int length = sizeof(*sa);
-
- if (getpeername(client_fd, sa, &length) < 0) {
- DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno) ));
- return NULL;
+ if (pss == NULL) {
+ pss = (struct sockaddr *)&ss;
+ plength = &length;
}
-
- return &sockin->sin_addr;
+
+ if (getpeername(fd, (struct sockaddr *)pss, plength) < 0) {
+ DEBUG(0,("getpeername failed. Error was %s\n",
+ strerror(errno) ));
+ return addr_buf;
+ }
+
+ print_sockaddr_len(addr_buf,
+ addr_buf_len,
+ pss,
+ *plength);
+ return addr_buf;
}
/*******************************************************************
confirm a hostname lookup to prevent spoof attacks.
******************************************************************/
-static BOOL matchname(char *remotehost,struct in_addr addr)
+static bool matchname(const char *remotehost,
+ const struct sockaddr *pss,
+ socklen_t len)
{
- struct hostent *hp;
- int i;
-
- if ((hp = sys_gethostbyname(remotehost)) == 0) {
- DEBUG(0,("sys_gethostbyname(%s): lookup failure.\n", remotehost));
- return False;
- }
+ struct addrinfo *res = NULL;
+ struct addrinfo *ailist = NULL;
+ char addr_buf[INET6_ADDRSTRLEN];
+ bool ret = interpret_string_addr_internal(&ailist,
+ remotehost,
+ AI_ADDRCONFIG|AI_CANONNAME);
+
+ if (!ret || ailist == NULL) {
+ DEBUG(3,("matchname: getaddrinfo failed for "
+ "name %s [%s]\n",
+ remotehost,
+ gai_strerror(ret) ));
+ return false;
+ }
/*
- * Make sure that gethostbyname() returns the "correct" host name.
- * Unfortunately, gethostbyname("localhost") sometimes yields
- * "localhost.domain". Since the latter host name comes from the
- * local DNS, we just have to trust it (all bets are off if the local
- * DNS is perverted). We always check the address list, though.
+ * Make sure that getaddrinfo() returns the "correct" host name.
*/
-
- if (!strequal(remotehost, hp->h_name)
- && !strequal(remotehost, "localhost")) {
- DEBUG(0,("host name/name mismatch: %s != %s\n",
- remotehost, hp->h_name));
- return False;
+
+ if (ailist->ai_canonname == NULL ||
+ (!strequal(remotehost, ailist->ai_canonname) &&
+ !strequal(remotehost, "localhost"))) {
+ DEBUG(0,("matchname: host name/name mismatch: %s != %s\n",
+ remotehost,
+ ailist->ai_canonname ?
+ ailist->ai_canonname : "(NULL)"));
+ freeaddrinfo(ailist);
+ return false;
}
-
+
/* Look up the host address in the address list we just got. */
- for (i = 0; hp->h_addr_list[i]; i++) {
- if (memcmp(hp->h_addr_list[i], (char *) & addr, sizeof(addr)) == 0)
- return True;
+ for (res = ailist; res; res = res->ai_next) {
+ if (!res->ai_addr) {
+ continue;
+ }
+ if (addr_equal((const struct sockaddr *)res->ai_addr,
+ (struct sockaddr *)pss)) {
+ freeaddrinfo(ailist);
+ return true;
+ }
}
-
+
/*
* The host name does not map to the original host address. Perhaps
* someone has compromised a name server. More likely someone botched
* it, but that could be dangerous, too.
*/
-
- DEBUG(0,("host name/address mismatch: %s != %s\n",
- inet_ntoa(addr), hp->h_name));
- return False;
+
+ DEBUG(0,("matchname: host name/address mismatch: %s != %s\n",
+ print_sockaddr_len(addr_buf,
+ sizeof(addr_buf),
+ pss,
+ len),
+ ailist->ai_canonname ? ailist->ai_canonname : "(NULL)"));
+
+ if (ailist) {
+ freeaddrinfo(ailist);
+ }
+ return false;
+}
+
+/*******************************************************************
+ Deal with the singleton cache.
+******************************************************************/
+
+struct name_addr_pair {
+ struct sockaddr_storage ss;
+ const char *name;
+};
+
+/*******************************************************************
+ Lookup a name/addr pair. Returns memory allocated from memcache.
+******************************************************************/
+
+static bool lookup_nc(struct name_addr_pair *nc)
+{
+ DATA_BLOB tmp;
+
+ ZERO_STRUCTP(nc);
+
+ if (!memcache_lookup(
+ NULL, SINGLETON_CACHE,
+ data_blob_string_const_null("get_peer_name"),
+ &tmp)) {
+ return false;
+ }
+
+ memcpy(&nc->ss, tmp.data, sizeof(nc->ss));
+ nc->name = (const char *)tmp.data + sizeof(nc->ss);
+ return true;
+}
+
+/*******************************************************************
+ Save a name/addr pair.
+******************************************************************/
+
+static void store_nc(const struct name_addr_pair *nc)
+{
+ DATA_BLOB tmp;
+ size_t namelen = strlen(nc->name);
+
+ tmp = data_blob(NULL, sizeof(nc->ss) + namelen + 1);
+ if (!tmp.data) {
+ return;
+ }
+ memcpy(tmp.data, &nc->ss, sizeof(nc->ss));
+ memcpy(tmp.data+sizeof(nc->ss), nc->name, namelen+1);
+
+ memcache_add(NULL, SINGLETON_CACHE,
+ data_blob_string_const_null("get_peer_name"),
+ tmp);
+ data_blob_free(&tmp);
}
/*******************************************************************
Return the DNS name of the remote end of a socket.
******************************************************************/
-char *get_socket_name(int fd, BOOL force_lookup)
+const char *get_peer_name(int fd, bool force_lookup)
{
- static pstring name_buf;
- static fstring addr_buf;
- struct hostent *hp;
- struct in_addr addr;
- char *p;
+ struct name_addr_pair nc;
+ char addr_buf[INET6_ADDRSTRLEN];
+ struct sockaddr_storage ss;
+ socklen_t length = sizeof(ss);
+ const char *p;
+ int ret;
+ char name_buf[MAX_DNS_NAME_LENGTH];
+ char tmp_name[MAX_DNS_NAME_LENGTH];
/* reverse lookups can be *very* expensive, and in many
situations won't work because many networks don't link dhcp
with dns. To avoid the delay we avoid the lookup if
possible */
- if (!lp_hostname_lookups() && (force_lookup == False)) {
- return get_socket_addr(fd);
+ if (!lp_hostname_lookups() && (force_lookup == false)) {
+ length = sizeof(nc.ss);
+ nc.name = get_peer_addr_internal(fd, addr_buf, sizeof(addr_buf),
+ (struct sockaddr *)&nc.ss, &length);
+ store_nc(&nc);
+ lookup_nc(&nc);
+ return nc.name ? nc.name : "UNKNOWN";
}
-
- p = get_socket_addr(fd);
- /* it might be the same as the last one - save some DNS work */
- if (strcmp(p, addr_buf) == 0) return name_buf;
+ lookup_nc(&nc);
- pstrcpy(name_buf,"UNKNOWN");
- if (fd == -1) return name_buf;
+ memset(&ss, '\0', sizeof(ss));
+ p = get_peer_addr_internal(fd, addr_buf, sizeof(addr_buf), (struct sockaddr *)&ss, &length);
- fstrcpy(addr_buf, p);
+ /* it might be the same as the last one - save some DNS work */
+ if (addr_equal((struct sockaddr *)&ss, (struct sockaddr *)&nc.ss)) {
+ return nc.name ? nc.name : "UNKNOWN";
+ }
+
+ /* Not the same. We need to lookup. */
+ if (fd == -1) {
+ return "UNKNOWN";
+ }
- addr = *interpret_addr2(p);
-
/* Look up the remote host name. */
- if ((hp = gethostbyaddr((char *)&addr.s_addr, sizeof(addr.s_addr), AF_INET)) == 0) {
- DEBUG(1,("Gethostbyaddr failed for %s\n",p));
- pstrcpy(name_buf, p);
+ ret = sys_getnameinfo((struct sockaddr *)&ss,
+ length,
+ name_buf,
+ sizeof(name_buf),
+ NULL,
+ 0,
+ 0);
+
+ if (ret) {
+ DEBUG(1,("get_peer_name: getnameinfo failed "
+ "for %s with error %s\n",
+ p,
+ gai_strerror(ret)));
+ strlcpy(name_buf, p, sizeof(name_buf));
} else {
- pstrcpy(name_buf,(char *)hp->h_name);
- if (!matchname(name_buf, addr)) {
+ if (!matchname(name_buf, (struct sockaddr *)&ss, length)) {
DEBUG(0,("Matchname failed on %s %s\n",name_buf,p));
- pstrcpy(name_buf,"UNKNOWN");
+ strlcpy(name_buf,"UNKNOWN",sizeof(name_buf));
}
}
- alpha_strcpy(name_buf, name_buf, "_-.", sizeof(name_buf));
+ /* can't pass the same source and dest strings in when you
+ use --enable-developer or the clobber_region() call will
+ get you */
+
+ strlcpy(tmp_name, name_buf, sizeof(tmp_name));
+ alpha_strcpy(name_buf, tmp_name, "_-.", sizeof(name_buf));
if (strstr(name_buf,"..")) {
- pstrcpy(name_buf, "UNKNOWN");
+ strlcpy(name_buf, "UNKNOWN", sizeof(name_buf));
}
- return name_buf;
+ nc.name = name_buf;
+ nc.ss = ss;
+
+ store_nc(&nc);
+ lookup_nc(&nc);
+ return nc.name ? nc.name : "UNKNOWN";
}
/*******************************************************************
Return the IP addr of the remote end of a socket as a string.
******************************************************************/
-char *get_socket_addr(int fd)
+const char *get_peer_addr(int fd, char *addr, size_t addr_len)
{
- struct sockaddr sa;
- struct sockaddr_in *sockin = (struct sockaddr_in *) (&sa);
- int length = sizeof(sa);
- static fstring addr_buf;
-
- fstrcpy(addr_buf,"0.0.0.0");
-
- if (fd == -1) {
- return addr_buf;
- }
-
- if (getpeername(fd, &sa, &length) < 0) {
- DEBUG(0,("getpeername failed. Error was %s\n", strerror(errno) ));
- return addr_buf;
- }
-
- fstrcpy(addr_buf,(char *)inet_ntoa(sockin->sin_addr));
-
- return addr_buf;
+ return get_peer_addr_internal(fd, addr, addr_len, NULL, NULL);
}
/*******************************************************************
struct stat st;
int sock;
mode_t old_umask;
- pstring path;
-
+ char *path = NULL;
+
old_umask = umask(0);
-
+
/* Create the socket directory or reuse the existing one */
-
+
if (lstat(socket_dir, &st) == -1) {
if (errno == ENOENT) {
/* Create directory */
if (mkdir(socket_dir, dir_perms) == -1) {
DEBUG(0, ("error creating socket directory "
- "%s: %s\n", socket_dir,
+ "%s: %s\n", socket_dir,
strerror(errno)));
goto out_umask;
}
socket_dir));
goto out_umask;
}
- if ((st.st_uid != sec_initial_uid()) ||
+ if ((st.st_uid != sec_initial_uid()) ||
((st.st_mode & 0777) != dir_perms)) {
DEBUG(0, ("invalid permissions on socket directory "
"%s\n", socket_dir));
goto out_umask;
}
}
-
+
/* Create the socket file */
-
+
sock = socket(AF_UNIX, SOCK_STREAM, 0);
-
+
if (sock == -1) {
- perror("socket");
- goto out_umask;
+ DEBUG(0, ("create_pipe_sock: socket error %s\n",
+ strerror(errno) ));
+ goto out_close;
}
-
- pstr_sprintf(path, "%s/%s", socket_dir, socket_name);
-
+
+ if (asprintf(&path, "%s/%s", socket_dir, socket_name) == -1) {
+ goto out_close;
+ }
+
unlink(path);
memset(&sunaddr, 0, sizeof(sunaddr));
sunaddr.sun_family = AF_UNIX;
- safe_strcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path)-1);
-
+ strlcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path));
+
if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
DEBUG(0, ("bind failed on pipe socket %s: %s\n", path,
strerror(errno)));
goto out_close;
}
-
+
if (listen(sock, 5) == -1) {
DEBUG(0, ("listen failed on pipe socket %s: %s\n", path,
strerror(errno)));
goto out_close;
}
-
+
+ SAFE_FREE(path);
+
umask(old_umask);
return sock;
out_close:
- close(sock);
+ SAFE_FREE(path);
+ if (sock != -1)
+ close(sock);
out_umask:
umask(old_umask);
return -1;
#endif /* HAVE_UNIXSOCKET */
}
+
+/****************************************************************************
+ Get my own canonical name, including domain.
+****************************************************************************/
+
+const char *get_mydnsfullname(void)
+{
+ struct addrinfo *res = NULL;
+ char my_hostname[HOST_NAME_MAX];
+ bool ret;
+ DATA_BLOB tmp;
+
+ if (memcache_lookup(NULL, SINGLETON_CACHE,
+ data_blob_string_const_null("get_mydnsfullname"),
+ &tmp)) {
+ SMB_ASSERT(tmp.length > 0);
+ return (const char *)tmp.data;
+ }
+
+ /* get my host name */
+ if (gethostname(my_hostname, sizeof(my_hostname)) == -1) {
+ DEBUG(0,("get_mydnsfullname: gethostname failed\n"));
+ return NULL;
+ }
+
+ /* Ensure null termination. */
+ my_hostname[sizeof(my_hostname)-1] = '\0';
+
+ ret = interpret_string_addr_internal(&res,
+ my_hostname,
+ AI_ADDRCONFIG|AI_CANONNAME);
+
+ if (!ret || res == NULL) {
+ DEBUG(3,("get_mydnsfullname: getaddrinfo failed for "
+ "name %s [%s]\n",
+ my_hostname,
+ gai_strerror(ret) ));
+ return NULL;
+ }
+
+ /*
+ * Make sure that getaddrinfo() returns the "correct" host name.
+ */
+
+ if (res->ai_canonname == NULL) {
+ DEBUG(3,("get_mydnsfullname: failed to get "
+ "canonical name for %s\n",
+ my_hostname));
+ freeaddrinfo(res);
+ return NULL;
+ }
+
+ /* This copies the data, so we must do a lookup
+ * afterwards to find the value to return.
+ */
+
+ memcache_add(NULL, SINGLETON_CACHE,
+ data_blob_string_const_null("get_mydnsfullname"),
+ data_blob_string_const_null(res->ai_canonname));
+
+ if (!memcache_lookup(NULL, SINGLETON_CACHE,
+ data_blob_string_const_null("get_mydnsfullname"),
+ &tmp)) {
+ tmp = data_blob_talloc(talloc_tos(), res->ai_canonname,
+ strlen(res->ai_canonname) + 1);
+ }
+
+ freeaddrinfo(res);
+
+ return (const char *)tmp.data;
+}
+
+/************************************************************
+ Is this my name ?
+************************************************************/
+
+bool is_myname_or_ipaddr(const char *s)
+{
+ TALLOC_CTX *ctx = talloc_tos();
+ char *name = NULL;
+ const char *dnsname;
+ char *servername = NULL;
+
+ if (!s) {
+ return false;
+ }
+
+ /* Santize the string from '\\name' */
+ name = talloc_strdup(ctx, s);
+ if (!name) {
+ return false;
+ }
+
+ servername = strrchr_m(name, '\\' );
+ if (!servername) {
+ servername = name;
+ } else {
+ servername++;
+ }
+
+ /* Optimize for the common case */
+ if (strequal(servername, global_myname())) {
+ return true;
+ }
+
+ /* Check for an alias */
+ if (is_myname(servername)) {
+ return true;
+ }
+
+ /* Check for loopback */
+ if (strequal(servername, "127.0.0.1") ||
+ strequal(servername, "::1")) {
+ return true;
+ }
+
+ if (strequal(servername, "localhost")) {
+ return true;
+ }
+
+ /* Maybe it's my dns name */
+ dnsname = get_mydnsfullname();
+ if (dnsname && strequal(servername, dnsname)) {
+ return true;
+ }
+
+ /* Handle possible CNAME records - convert to an IP addr. */
+ if (!is_ipaddress(servername)) {
+ /* Use DNS to resolve the name, but only the first address */
+ struct sockaddr_storage ss;
+ if (interpret_string_addr(&ss, servername,0)) {
+ print_sockaddr(name,
+ sizeof(name),
+ &ss);
+ servername = name;
+ }
+ }
+
+ /* Maybe its an IP address? */
+ if (is_ipaddress(servername)) {
+ struct sockaddr_storage ss;
+ struct iface_struct *nics;
+ int i, n;
+
+ if (!interpret_string_addr(&ss, servername, AI_NUMERICHOST)) {
+ return false;
+ }
+
+ if (is_zero_addr((struct sockaddr *)&ss) ||
+ is_loopback_addr((struct sockaddr *)&ss)) {
+ return false;
+ }
+
+ nics = TALLOC_ARRAY(ctx, struct iface_struct,
+ MAX_INTERFACES);
+ if (!nics) {
+ return false;
+ }
+ n = get_interfaces(nics, MAX_INTERFACES);
+ for (i=0; i<n; i++) {
+ if (addr_equal((struct sockaddr *)&nics[i].ip, (struct sockaddr *)&ss)) {
+ TALLOC_FREE(nics);
+ return true;
+ }
+ }
+ TALLOC_FREE(nics);
+ }
+
+ /* No match */
+ return false;
+}
git.samba.org / samba.git / blobdiff