appl/popper/pop_get_command.c

   1 /*
   2  * Copyright (c) 1989 Regents of the University of California.
   3  * All rights reserved.  The Berkeley software License Agreement
   4  * specifies the terms and conditions for redistribution.
   5  */
   6
   7 #include <popper.h>
   8 RCSID("$Id$");
   9
  10 /*
  11  *  get_command:    Extract the command from an input line form a POP client
  12  */
  13
  14 int pop_capa (POP *p);
  15 static state_table states[] = {
  16         {auth1,  "user", 1,  1,  pop_user,   {auth1, auth2}},
  17         {auth2,  "pass", 1,  99, pop_pass,   {auth1, trans}},
  18 #ifdef RPOP
  19         {auth2,  "rpop", 1,  1,  pop_rpop,   {auth1, trans}},
  20 #endif /* RPOP */
  21 #ifdef SASL
  22         {auth1,  "auth", 1,  2,  pop_auth,   {auth1, trans}},
  23 #endif
  24         {auth1,  "quit", 0,  0,  pop_quit,   {halt,  halt}},
  25         {auth2,  "quit", 0,  0,  pop_quit,   {halt,  halt}},
  26 #ifdef CAPA
  27         {auth1,  "capa", 0,  0,  pop_capa,   {auth1, auth1}},
  28         {auth2,  "capa", 0,  0,  pop_capa,   {auth2, auth2}},
  29         {trans,  "capa", 0,  0,  pop_capa,   {trans, trans}},
  30 #endif
  31         {trans,  "stat", 0,  0,  pop_stat,   {trans, trans}},
  32         {trans,  "list", 0,  1,  pop_list,   {trans, trans}},
  33         {trans,  "retr", 1,  1,  pop_send,   {trans, trans}},
  34         {trans,  "dele", 1,  1,  pop_dele,   {trans, trans}},
  35         {trans,  "noop", 0,  0,  NULL,       {trans, trans}},
  36         {trans,  "rset", 0,  0,  pop_rset,   {trans, trans}},
  37         {trans,  "top",  2,  2,  pop_send,   {trans, trans}},
  38         {trans,  "last", 0,  0,  pop_last,   {trans, trans}},
  39         {trans,  "quit", 0,  0,  pop_updt,   {halt,  halt}},
  40         {trans,  "help", 0,  0,  pop_help,   {trans, trans}},
  41 #ifdef UIDL
  42         {trans,  "uidl", 0,  1,  pop_uidl,   {trans, trans}},
  43 #endif
  44 #ifdef XOVER
  45         {trans, "xover", 0,  0,  pop_xover,  {trans, trans}},
  46 #endif
  47 #ifdef XDELE
  48         {trans,  "xdele", 1,  2,  pop_xdele,   {trans, trans}},
  49 #endif
  50         {(state) 0,  NULL,   0,  0,  NULL,       {halt,  halt}},
  51 };
  52
  53 int
  54 pop_capa (POP *p)
  55 {
  56     /*  Search for the POP command in the command/state table */
  57     pop_msg (p,POP_SUCCESS, "Capability list follows");
  58     if(p->auth_level == AUTH_NONE || p->auth_level == AUTH_OTP)
  59         fprintf(p->output, "USER\r\n");
  60     fprintf(p->output, "TOP\r\n");
  61     fprintf(p->output, "PIPELINING\r\n");
  62     fprintf(p->output, "EXPIRE NEVER\r\n");
  63     fprintf(p->output, "RESP-CODES\r\n");
  64 #ifdef SASL
  65     pop_capa_sasl(p);
  66 #endif
  67 #ifdef UIDL
  68     fprintf(p->output, "UIDL\r\n");
  69 #endif
  70 #ifdef XOVER
  71     fprintf(p->output, "XOVER\r\n");
  72 #endif
  73 #ifdef XDELE
  74     fprintf(p->output, "XDELE\r\n");
  75 #endif
  76     if(p->CurrentState == trans)
  77         fprintf(p->output, "IMPLEMENTATION %s-%s\r\n", PACKAGE, VERSION);
  78     fprintf(p->output,".\r\n");
  79     fflush(p->output);
  80
  81     p->flags |= POP_FLAG_CAPA;
  82
  83     return(POP_SUCCESS);
  84 }
  85
  86 state_table *
  87 pop_get_command(POP *p, char *mp)
  88 {
  89     state_table     *   s;
  90     char                buf[MAXMSGLINELEN];
  91
  92     /*  Save a copy of the original client line */
  93 #ifdef DEBUG
  94     if(p->debug) strlcpy (buf, mp, sizeof(buf));
  95 #endif /* DEBUG */
  96
  97     /*  Parse the message into the parameter array */
  98     if ((p->parm_count = pop_parse(p,mp)) < 0) return(NULL);
  99
 100     /*  Do not log cleartext passwords */
 101 #ifdef DEBUG
 102     if(p->debug){
 103         if(strcmp(p->pop_command,"pass") == 0)
 104             pop_log(p,POP_DEBUG,"Received: \"%s xxxxxxxxx\"",p->pop_command);
 105         else {
 106             /*  Remove trailing <LF> */
 107             buf[strlen(buf)-2] = '\0';
 108             pop_log(p,POP_DEBUG,"Received: \"%s\"",buf);
 109         }
 110     }
 111 #endif /* DEBUG */
 112
 113     /*  Search for the POP command in the command/state table */
 114     for (s = states; s->command; s++) {
 115
 116         /*  Is this a valid command for the current operating state? */
 117         if (strcmp(s->command,p->pop_command) == 0
 118              && s->ValidCurrentState == p->CurrentState) {
 119
 120             /*  Were too few parameters passed to the command? */
 121             if (p->parm_count < s->min_parms) {
 122                 pop_msg(p,POP_FAILURE,
 123                         "Too few arguments for the %s command.",
 124                         p->pop_command);
 125                 return NULL;
 126             }
 127
 128             /*  Were too many parameters passed to the command? */
 129             if (p->parm_count > s->max_parms) {
 130                 pop_msg(p,POP_FAILURE,
 131                         "Too many arguments for the %s command.",
 132                         p->pop_command);
 133                 return NULL;
 134            }
 135
 136             /*  Return a pointer to the entry for this command in
 137                 the command/state table */
 138             return (s);
 139         }
 140     }
 141     /*  The client command was not located in the command/state table */
 142     pop_msg(p,POP_FAILURE,
 143             "Unknown command: \"%s\".",p->pop_command);
 144     return NULL;
 145 }
 146
 147 int
 148 pop_help (POP *p)
 149 {
 150     state_table         *s;
 151
 152     pop_msg(p, POP_SUCCESS, "help");
 153
 154     for (s = states; s->command; s++) {
 155         fprintf (p->output, "%s\r\n", s->command);
 156     }
 157     fprintf (p->output, ".\r\n");
 158     fflush (p->output);
 159     return POP_SUCCESS;
 160 }