1 | /* |
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2 | * Error handling for the remctl client library. |
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3 | * |
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4 | * A set of helper routines to do error handling inside the remctl client |
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5 | * library. These mostly involve setting the error parameter in the remctl |
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6 | * struct to something appropriate so that the next call to remctl_error will |
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7 | * return the appropriate details. |
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8 | * |
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9 | * Written by Russ Allbery <rra@stanford.edu> |
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10 | * Copyright 2006, 2007, 2008 |
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11 | * Board of Trustees, Leland Stanford Jr. University |
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12 | * |
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13 | * See LICENSE for licensing terms. |
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14 | */ |
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15 | |
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16 | #include <config.h> |
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17 | #include <portable/system.h> |
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18 | #include <portable/gssapi.h> |
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19 | #include <portable/socket.h> |
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20 | |
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21 | #include <errno.h> |
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22 | |
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23 | #include <client/internal.h> |
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24 | #include <util/util.h> |
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25 | |
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26 | /* |
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27 | * Internal function to set the error message, freeing an old error message if |
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28 | * one is present. |
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29 | */ |
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30 | void |
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31 | internal_set_error(struct remctl *r, const char *format, ...) |
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32 | { |
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33 | va_list args; |
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34 | int status; |
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35 | |
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36 | if (r->error != NULL) |
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37 | free(r->error); |
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38 | va_start(args, format); |
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39 | status = vasprintf(&r->error, format, args); |
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40 | va_end(args); |
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41 | |
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42 | /* |
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43 | * If vasprintf fails, there isn't much we can do, but make sure that at |
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44 | * least the error is in a consistent state. |
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45 | */ |
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46 | if (status < 0) |
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47 | r->error = NULL; |
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48 | } |
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49 | |
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50 | |
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51 | /* |
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52 | * Internal function to set the remctl error message from a GSS-API error |
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53 | * message. |
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54 | */ |
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55 | void |
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56 | internal_gssapi_error(struct remctl *r, const char *error, OM_uint32 major, |
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57 | OM_uint32 minor) |
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58 | { |
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59 | if (r->error != NULL) |
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60 | free(r->error); |
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61 | r->error = gssapi_error_string(error, major, minor); |
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62 | } |
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63 | |
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64 | |
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65 | /* |
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66 | * Internal function to set the remctl error message from a token error. |
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67 | * Handles the various token failure codes from the token_send and token_recv |
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68 | * functions and their *_priv counterparts. |
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69 | */ |
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70 | void |
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71 | internal_token_error(struct remctl *r, const char *error, int status, |
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72 | OM_uint32 major, OM_uint32 minor) |
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73 | { |
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74 | switch (status) { |
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75 | case TOKEN_OK: |
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76 | internal_set_error(r, "error %s", error); |
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77 | break; |
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78 | case TOKEN_FAIL_SYSTEM: |
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79 | internal_set_error(r, "error %s: %s", error, strerror(errno)); |
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80 | break; |
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81 | case TOKEN_FAIL_SOCKET: |
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82 | internal_set_error(r, "error %s: %s", error, |
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83 | socket_strerror(socket_errno)); |
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84 | break; |
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85 | case TOKEN_FAIL_INVALID: |
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86 | internal_set_error(r, "error %s: invalid token format", error); |
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87 | break; |
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88 | case TOKEN_FAIL_LARGE: |
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89 | internal_set_error(r, "error %s: token too larger", error); |
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90 | break; |
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91 | case TOKEN_FAIL_EOF: |
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92 | internal_set_error(r, "error %s: unexpected end of file", error); |
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93 | break; |
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94 | case TOKEN_FAIL_GSSAPI: |
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95 | internal_gssapi_error(r, error, major, minor); |
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96 | break; |
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97 | default: |
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98 | internal_set_error(r, "error %s: unknown error", error); |
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99 | break; |
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100 | } |
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101 | } |
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