lib: Introduce iov_buflen
[obnox/samba/samba-obnox.git] / source3 / lib / util_sock.c
index a35bd58d11d415e77b943a57ff725ef15e39b174..b8149cad83845ae54590e98ecad0c21edf85ce3c 100644 (file)
 #include "../lib/util/tevent_ntstatus.h"
 #include "../lib/tsocket/tsocket.h"
 
-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);
@@ -47,26 +42,6 @@ int client_socket_port(int 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.
 ****************************************************************************/
@@ -226,6 +201,24 @@ NTSTATUS read_data(int fd, char *buffer, size_t N)
        return read_fd_with_timeout(fd, buffer, N, N, 0, NULL);
 }
 
+ssize_t iov_buflen(const struct iovec *iov, int iovcnt)
+{
+       size_t buflen = 0;
+       int i;
+
+       for (i=0; i<iovcnt; i++) {
+               size_t thislen = iov[i].iov_len;
+               size_t tmp = buflen + thislen;
+
+               if ((tmp < buflen) || (tmp < thislen)) {
+                       /* overflow */
+                       return -1;
+               }
+               buflen = tmp;
+       }
+       return buflen;
+}
+
 /****************************************************************************
  Write all data from an iov array
  NB. This can be called with a non-socket fd, don't add dependencies
@@ -234,15 +227,15 @@ NTSTATUS read_data(int fd, char *buffer, size_t N)
 
 ssize_t write_data_iov(int fd, const struct iovec *orig_iov, int iovcnt)
 {
-       int i;
-       size_t to_send;
+       ssize_t to_send;
        ssize_t thistime;
        size_t sent;
        struct iovec *iov_copy, *iov;
 
-       to_send = 0;
-       for (i=0; i<iovcnt; i++) {
-               to_send += orig_iov[i].iov_len;
+       to_send = iov_buflen(orig_iov, iovcnt);
+       if (to_send == -1) {
+               errno = EINVAL;
+               return -1;
        }
 
        thistime = sys_writev(fd, orig_iov, iovcnt);
@@ -320,7 +313,7 @@ bool send_keepalive(int client)
 {
        unsigned char buf[4];
 
-       buf[0] = SMBkeepalive;
+       buf[0] = NBSSkeepalive;
        buf[1] = buf[2] = buf[3] = 0;
 
        return(write_data(client,(char *)buf,4) == 4);
@@ -350,7 +343,7 @@ NTSTATUS read_smb_length_return_keepalive(int fd, char *inbuf,
        *len = smb_len(inbuf);
        msg_type = CVAL(inbuf,0);
 
-       if (msg_type == SMBkeepalive) {
+       if (msg_type == NBSSkeepalive) {
                DEBUG(5,("Got keepalive packet\n"));
        }
 
@@ -502,8 +495,9 @@ int open_socket_in(int type,
 
        /* now we've got a socket - we need to bind it */
        if (bind(res, (struct sockaddr *)&sock, slen) == -1 ) {
-               if( DEBUGLVL(dlevel) && (port == SMB_PORT1 ||
-                               port == SMB_PORT2 || port == NMB_PORT) ) {
+               if( DEBUGLVL(dlevel) && (port == NMB_PORT ||
+                                        port == NBT_SMB_PORT ||
+                                        port == TCP_SMB_PORT) ) {
                        char addr[INET6_ADDRSTRLEN];
                        print_sockaddr(addr, sizeof(addr),
                                        &sock);
@@ -521,7 +515,7 @@ int open_socket_in(int type,
 
 struct open_socket_out_state {
        int fd;
-       struct event_context *ev;
+       struct tevent_context *ev;
        struct sockaddr_storage ss;
        socklen_t salen;
        uint16_t port;
@@ -543,7 +537,7 @@ static int open_socket_out_state_destructor(struct open_socket_out_state *s)
 **************************************************************************/
 
 struct tevent_req *open_socket_out_send(TALLOC_CTX *mem_ctx,
-                                       struct event_context *ev,
+                                       struct tevent_context *ev,
                                        const struct sockaddr_storage *pss,
                                        uint16_t port,
                                        int timeout)
@@ -605,7 +599,7 @@ struct tevent_req *open_socket_out_send(TALLOC_CTX *mem_ctx,
 
        subreq = async_connect_send(state, state->ev, state->fd,
                                    (struct sockaddr *)&state->ss,
-                                   state->salen);
+                                   state->salen, NULL, NULL, NULL);
        if ((subreq == NULL)
            || !tevent_req_set_endtime(
                    subreq, state->ev,
@@ -657,7 +651,7 @@ static void open_socket_out_connected(struct tevent_req *subreq)
 
                subreq = async_connect_send(state, state->ev, state->fd,
                                            (struct sockaddr *)&state->ss,
-                                           state->salen);
+                                           state->salen, NULL, NULL, NULL);
                if (tevent_req_nomem(subreq, req)) {
                        return;
                }
@@ -710,11 +704,11 @@ NTSTATUS open_socket_out(const struct sockaddr_storage *pss, uint16_t port,
                         int timeout, int *pfd)
 {
        TALLOC_CTX *frame = talloc_stackframe();
-       struct event_context *ev;
+       struct tevent_context *ev;
        struct tevent_req *req;
        NTSTATUS status = NT_STATUS_NO_MEMORY;
 
-       ev = event_context_init(frame);
+       ev = samba_tevent_context_init(frame);
        if (ev == NULL) {
                goto fail;
        }
@@ -734,7 +728,7 @@ NTSTATUS open_socket_out(const struct sockaddr_storage *pss, uint16_t port,
 }
 
 struct open_socket_out_defer_state {
-       struct event_context *ev;
+       struct tevent_context *ev;
        struct sockaddr_storage ss;
        uint16_t port;
        int timeout;
@@ -745,7 +739,7 @@ static void open_socket_out_defer_waited(struct tevent_req *subreq);
 static void open_socket_out_defer_connected(struct tevent_req *subreq);
 
 struct tevent_req *open_socket_out_defer_send(TALLOC_CTX *mem_ctx,
-                                             struct event_context *ev,
+                                             struct tevent_context *ev,
                                              struct timeval wait_time,
                                              const struct sockaddr_storage *pss,
                                              uint16_t port,
@@ -839,6 +833,7 @@ int open_udp_socket(const char *host, int port)
 {
        struct sockaddr_storage ss;
        int res;
+       socklen_t salen;
 
        if (!interpret_string_addr(&ss, host, 0)) {
                DEBUG(10,("open_udp_socket: can't resolve name %s\n",
@@ -861,15 +856,21 @@ int open_udp_socket(const char *host, int port)
                        setup_linklocal_scope_id(
                                (struct sockaddr *)&ss);
                }
-       }
+               salen = sizeof(struct sockaddr_in6);
+       } else 
 #endif
-        if (ss.ss_family == AF_INET) {
-                struct sockaddr_in *psa;
-                psa = (struct sockaddr_in *)&ss;
-                psa->sin_port = htons(port);
-        }
+       if (ss.ss_family == AF_INET) {
+               struct sockaddr_in *psa;
+               psa = (struct sockaddr_in *)&ss;
+               psa->sin_port = htons(port);
+           salen = sizeof(struct sockaddr_in);
+       } else {
+               DEBUG(1, ("unknown socket family %d", ss.ss_family));
+               close(res);
+               return -1;
+       }
 
-       if (sys_connect(res,(struct sockaddr *)&ss)) {
+       if (connect(res, (struct sockaddr *)&ss, salen)) {
                close(res);
                return -1;
        }
@@ -1039,85 +1040,6 @@ static void store_nc(const struct name_addr_pair *nc)
        data_blob_free(&tmp);
 }
 
-/*******************************************************************
- Return the DNS name of the remote end of a socket.
-******************************************************************/
-
-const char *get_peer_name(int fd, bool force_lookup)
-{
-       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)) {
-               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";
-       }
-
-       lookup_nc(&nc);
-
-       memset(&ss, '\0', sizeof(ss));
-       p = get_peer_addr_internal(fd, addr_buf, sizeof(addr_buf), (struct sockaddr *)&ss, &length);
-
-       /* it might be the same as the last one - save some DNS work */
-       if (sockaddr_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";
-       }
-
-       /* Look up the remote host name. */
-       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 {
-               if (!matchname(name_buf, (struct sockaddr *)&ss, length)) {
-                       DEBUG(0,("Matchname failed on %s %s\n",name_buf,p));
-                       strlcpy(name_buf,"UNKNOWN",sizeof(name_buf));
-               }
-       }
-
-       strlcpy(tmp_name, name_buf, sizeof(tmp_name));
-       alpha_strcpy(name_buf, tmp_name, "_-.", sizeof(name_buf));
-       if (strstr(name_buf,"..")) {
-               strlcpy(name_buf, "UNKNOWN", sizeof(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.
  ******************************************************************/
@@ -1135,7 +1057,7 @@ int get_remote_hostname(const struct tsocket_address *remote_address,
        char tmp_name[MAX_DNS_NAME_LENGTH];
        struct name_addr_pair nc;
        struct sockaddr_storage ss;
-       socklen_t len;
+       ssize_t len;
        int rc;
 
        if (!lp_hostname_lookups()) {
@@ -1205,7 +1127,7 @@ int get_remote_hostname(const struct tsocket_address *remote_address,
                         gai_strerror(rc)));
                strlcpy(name_buf, p, sizeof(name_buf));
 
-               talloc_free(p);
+               TALLOC_FREE(p);
        } else {
                if (!matchname(name_buf, (struct sockaddr *)&ss, len)) {
                        DEBUG(0,("matchname failed on %s\n", name_buf));
@@ -1248,53 +1170,21 @@ int create_pipe_sock(const char *socket_dir,
 {
 #ifdef HAVE_UNIXSOCKET
        struct sockaddr_un sunaddr;
-       struct stat st;
-       int sock;
+       bool ok;
+       int sock = -1;
        mode_t old_umask;
        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,
-                                       strerror(errno)));
-                               goto out_umask;
-                       }
-               } else {
-                       DEBUG(0, ("lstat failed on socket directory %s: %s\n",
-                               socket_dir, strerror(errno)));
-                       goto out_umask;
-               }
-       } else {
-               /* Check ownership and permission on existing directory */
-               if (!S_ISDIR(st.st_mode)) {
-                       DEBUG(0, ("socket directory '%s' isn't a directory\n",
-                               socket_dir));
-                       goto out_umask;
-               }
-               if (st.st_uid != sec_initial_uid()) {
-                       DEBUG(0, ("invalid ownership on directory "
-                                 "'%s'\n", socket_dir));
-                       umask(old_umask);
-                       goto out_umask;
-               }
-               if ((st.st_mode & 0777) != dir_perms) {
-                       DEBUG(0, ("invalid permissions on directory "
-                                 "'%s': has 0%o should be 0%o\n", socket_dir,
-                                 (st.st_mode & 0777), dir_perms));
-                       umask(old_umask);
-                       goto out_umask;
-               }
+       ok = directory_create_or_exist_strict(socket_dir,
+                                             sec_initial_uid(),
+                                             dir_perms);
+       if (!ok) {
+               goto out_close;
        }
 
        /* Create the socket file */
-
        sock = socket(AF_UNIX, SOCK_STREAM, 0);
 
        if (sock == -1) {
@@ -1318,12 +1208,6 @@ int create_pipe_sock(const char *socket_dir,
                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);
@@ -1334,7 +1218,6 @@ out_close:
        if (sock != -1)
                close(sock);
 
-out_umask:
        umask(old_umask);
        return -1;
 
@@ -1625,27 +1508,18 @@ int getaddrinfo_recv(struct tevent_req *req, struct addrinfo **res)
 
 int poll_one_fd(int fd, int events, int timeout, int *revents)
 {
-       struct pollfd *fds;
+       struct pollfd pfd;
        int ret;
-       int saved_errno;
 
-       fds = talloc_zero_array(talloc_tos(), struct pollfd, 2);
-       if (fds == NULL) {
-               errno = ENOMEM;
-               return -1;
-       }
-       fds[0].fd = fd;
-       fds[0].events = events;
+       pfd.fd = fd;
+       pfd.events = events;
 
-       ret = sys_poll(fds, 1, timeout);
+       ret = poll(&pfd, 1, timeout);
 
        /*
         * Assign whatever poll did, even in the ret<=0 case.
         */
-       *revents = fds[0].revents;
-       saved_errno = errno;
-       TALLOC_FREE(fds);
-       errno = saved_errno;
+       *revents = pfd.revents;
 
        return ret;
 }