cifs.upcall: clean up logging and add debug messages
[sfrench/samba-autobuild/.git] / client / cifs.upcall.c
index e592a4f7c52a213338314748ca89748ebc52d0cf..da6b1b8d430ee1ad22725a8c22d4f9010165e5d8 100644 (file)
@@ -58,14 +58,20 @@ get_krb5_ccname(pid_t pid)
        buf[4095] = '\0';
        snprintf(buf, 4095, "/proc/%d/environ", pid);
        fd = open(buf, O_RDONLY);
-       if (fd < 0)
+       if (fd < 0) {
+               syslog(LOG_DEBUG, "%s: unable to open %s: %d", __func__, buf,
+                       errno);
                return NULL;
+       }
 
        /* FIXME: don't assume that we get it all in the first read? */
        len = read(fd, buf, 4096);
        close(fd);
-       if (len < 0)
+       if (len < 0) {
+               syslog(LOG_DEBUG, "%s: unable to read from /proc/%d/environ: "
+                                 "%d", __func__, pid, errno);
                return NULL;
+       }
 
        left = len;
        p = buf;
@@ -80,9 +86,11 @@ get_krb5_ccname(pid_t pid)
                }
                p += 11;
                left -= 11;
-               value = strndup(p, left);
+               value = SMB_STRNDUP(p, left);
                break;
        }
+       syslog(LOG_DEBUG, "%s: KRB5CCNAME=%s", __func__,
+                               value ? value : "(null)");
        return value;
 }
 
@@ -113,12 +121,20 @@ handle_krb5_mech(const char *oid, const char *principal, DATA_BLOB *secblob,
        int retval;
        DATA_BLOB tkt, tkt_wrapped;
 
+       syslog(LOG_DEBUG, "%s: getting service ticket for %s", __func__,
+                         principal);
+
        /* get a kerberos ticket for the service and extract the session key */
        retval = cli_krb5_get_ticket(principal, 0, &tkt, sess_key, 0, ccname,
                                     NULL);
 
-       if (retval)
+       if (retval) {
+               syslog(LOG_DEBUG, "%s: failed to obtain service ticket (%d)",
+                                 __func__, retval);
                return retval;
+       }
+
+       syslog(LOG_DEBUG, "%s: obtained service ticket", __func__);
 
        /* wrap that up in a nice GSS-API wrapping */
        tkt_wrapped = spnego_gen_krb5_wrap(tkt, TOK_ID_KRB_AP_REQ);
@@ -131,13 +147,13 @@ handle_krb5_mech(const char *oid, const char *principal, DATA_BLOB *secblob,
        return retval;
 }
 
-#define DKD_HAVE_HOSTNAME      1
-#define DKD_HAVE_VERSION       2
-#define DKD_HAVE_SEC           4
-#define DKD_HAVE_IPV4          8
-#define DKD_HAVE_IPV6          16
-#define DKD_HAVE_UID           32
-#define DKD_HAVE_PID           64
+#define DKD_HAVE_HOSTNAME      0x1
+#define DKD_HAVE_VERSION       0x2
+#define DKD_HAVE_SEC           0x4
+#define DKD_HAVE_IPV4          0x8
+#define DKD_HAVE_IPV6          0x10
+#define DKD_HAVE_UID           0x20
+#define DKD_HAVE_PID           0x40
 #define DKD_MUSTHAVE_SET (DKD_HAVE_HOSTNAME|DKD_HAVE_VERSION|DKD_HAVE_SEC)
 
 static int
@@ -171,7 +187,7 @@ decode_key_description(const char *desc, int *ver, secType_t *sec,
                        errno = 0;
                        *pid = strtol(tkn + 4, NULL, 0);
                        if (errno != 0) {
-                               syslog(LOG_WARNING, "Invalid pid format: %s",
+                               syslog(LOG_ERR, "Invalid pid format: %s",
                                       strerror(errno));
                                return 1;
                        } else {
@@ -189,7 +205,7 @@ decode_key_description(const char *desc, int *ver, secType_t *sec,
                        errno = 0;
                        *uid = strtol(tkn + 4, NULL, 16);
                        if (errno != 0) {
-                               syslog(LOG_WARNING, "Invalid uid format: %s",
+                               syslog(LOG_ERR, "Invalid uid format: %s",
                                       strerror(errno));
                                return 1;
                        } else {
@@ -199,8 +215,7 @@ decode_key_description(const char *desc, int *ver, secType_t *sec,
                        errno = 0;
                        *ver = strtol(tkn + 4, NULL, 16);
                        if (errno != 0) {
-                               syslog(LOG_WARNING,
-                                      "Invalid version format: %s",
+                               syslog(LOG_ERR, "Invalid version format: %s",
                                       strerror(errno));
                                return 1;
                        } else {
@@ -226,7 +241,7 @@ cifs_resolver(const key_serial_t key, const char *key_descr)
        for (c = 1; c <= 4; c++) {
                keyend = index(keyend+1, ';');
                if (!keyend) {
-                       syslog(LOG_WARNING, "invalid key description: %s",
+                       syslog(LOG_ERR, "invalid key description: %s",
                                        key_descr);
                        return 1;
                }
@@ -236,7 +251,7 @@ cifs_resolver(const key_serial_t key, const char *key_descr)
        /* resolve name to ip */
        c = getaddrinfo(keyend, NULL, NULL, &addr);
        if (c) {
-               syslog(LOG_WARNING, "unable to resolve hostname: %s [%s]",
+               syslog(LOG_ERR, "unable to resolve hostname: %s [%s]",
                                keyend, gai_strerror(c));
                return 1;
        }
@@ -248,8 +263,7 @@ cifs_resolver(const key_serial_t key, const char *key_descr)
                p = &(((struct sockaddr_in6 *)addr->ai_addr)->sin6_addr);
        }
        if (!inet_ntop(addr->ai_family, p, ip, sizeof(ip))) {
-               syslog(LOG_WARNING, "%s: inet_ntop: %s",
-                               __FUNCTION__, strerror(errno));
+               syslog(LOG_ERR, "%s: inet_ntop: %s", __func__, strerror(errno));
                freeaddrinfo(addr);
                return 1;
        }
@@ -257,8 +271,8 @@ cifs_resolver(const key_serial_t key, const char *key_descr)
        /* setup key */
        c = keyctl_instantiate(key, ip, strlen(ip)+1, 0);
        if (c == -1) {
-               syslog(LOG_WARNING, "%s: keyctl_instantiate: %s",
-                               __FUNCTION__, strerror(errno));
+               syslog(LOG_ERR, "%s: keyctl_instantiate: %s", __func__,
+                               strerror(errno));
                freeaddrinfo(addr);
                return 1;
        }
@@ -270,7 +284,7 @@ cifs_resolver(const key_serial_t key, const char *key_descr)
 static void
 usage(void)
 {
-       syslog(LOG_WARNING, "Usage: %s [-c] [-v] key_serial", prog);
+       syslog(LOG_INFO, "Usage: %s [-c] [-v] key_serial", prog);
        fprintf(stderr, "Usage: %s [-c] [-v] key_serial\n", prog);
 }
 
@@ -303,7 +317,7 @@ int main(const int argc, char *const argv[])
                        goto out;
                        }
                default:{
-                       syslog(LOG_WARNING, "unknown option: %c", c);
+                       syslog(LOG_ERR, "unknown option: %c", c);
                        goto out;
                        }
                }
@@ -320,18 +334,20 @@ int main(const int argc, char *const argv[])
        key = strtol(argv[optind], NULL, 10);
        if (errno != 0) {
                key = 0;
-               syslog(LOG_WARNING, "Invalid key format: %s", strerror(errno));
+               syslog(LOG_ERR, "Invalid key format: %s", strerror(errno));
                goto out;
        }
 
        rc = keyctl_describe_alloc(key, &buf);
        if (rc == -1) {
-               syslog(LOG_WARNING, "keyctl_describe_alloc failed: %s",
+               syslog(LOG_ERR, "keyctl_describe_alloc failed: %s",
                       strerror(errno));
                rc = 1;
                goto out;
        }
 
+       syslog(LOG_DEBUG, "key description: %s", buf);
+
        if ((strncmp(buf, "cifs.resolver", sizeof("cifs.resolver")-1) == 0) ||
            (strncmp(buf, "dns_resolver", sizeof("dns_resolver")-1) == 0)) {
                rc = cifs_resolver(key, buf);
@@ -341,8 +357,8 @@ int main(const int argc, char *const argv[])
        rc = decode_key_description(buf, &kernel_upcall_version, &sectype,
                                    &hostname, &uid, &pid);
        if ((rc & DKD_MUSTHAVE_SET) != DKD_MUSTHAVE_SET) {
-               syslog(LOG_WARNING,
-                      "unable to get from description necessary params");
+               syslog(LOG_ERR, "unable to get necessary params from key "
+                               "description (0x%x)", rc);
                rc = 1;
                SAFE_FREE(buf);
                goto out;
@@ -350,9 +366,8 @@ int main(const int argc, char *const argv[])
        SAFE_FREE(buf);
 
        if (kernel_upcall_version > CIFS_SPNEGO_UPCALL_VERSION) {
-               syslog(LOG_WARNING,
-                      "incompatible kernel upcall version: 0x%x",
-                      kernel_upcall_version);
+               syslog(LOG_ERR, "incompatible kernel upcall version: 0x%x",
+                               kernel_upcall_version);
                rc = 1;
                goto out;
        }
@@ -363,7 +378,7 @@ int main(const int argc, char *const argv[])
        if (rc & DKD_HAVE_UID) {
                rc = setuid(uid);
                if (rc == -1) {
-                       syslog(LOG_WARNING, "setuid: %s", strerror(errno));
+                       syslog(LOG_ERR, "setuid: %s", strerror(errno));
                        goto out;
                }
        }
@@ -400,7 +415,7 @@ int main(const int argc, char *const argv[])
                        break;
                }
        default:{
-                       syslog(LOG_WARNING, "sectype: %d is not implemented",
+                       syslog(LOG_ERR, "sectype: %d is not implemented",
                               sectype);
                        rc = 1;
                        break;
@@ -430,7 +445,7 @@ int main(const int argc, char *const argv[])
        /* setup key */
        rc = keyctl_instantiate(key, keydata, datalen, 0);
        if (rc == -1) {
-               syslog(LOG_WARNING, "keyctl_instantiate: %s", strerror(errno));
+               syslog(LOG_ERR, "keyctl_instantiate: %s", strerror(errno));
                goto out;
        }