Mercurial > hg > mlmmj
annotate src/checkwait_smtpreply.c @ 775:d0bf2135ab34
Check the server gives a reply before reading it to avoid segfaulting
| author | Ben Schmidt |
|---|---|
| date | Fri, 12 Nov 2010 02:27:50 +1100 |
| parents | a38cde48669f |
| children | 04d916168efb |
| rev | line source |
|---|---|
| 0 | 1 /* Copyright (C) 2002, 2003 Mads Martin Joergensen <mmj at mmj.dk> |
| 2 * | |
| 3 * $Id$ | |
| 4 * | |
| 225 | 5 * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 6 * of this software and associated documentation files (the "Software"), to | |
| 7 * deal in the Software without restriction, including without limitation the | |
| 8 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
| 9 * sell copies of the Software, and to permit persons to whom the Software is | |
| 10 * furnished to do so, subject to the following conditions: | |
| 11 * | |
| 12 * The above copyright notice and this permission notice shall be included in | |
| 13 * all copies or substantial portions of the Software. | |
| 14 * | |
| 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| 18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
| 21 * IN THE SOFTWARE. | |
| 0 | 22 */ |
| 23 | |
| 24 #include <stdio.h> | |
| 25 #include <unistd.h> | |
|
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26 #include <string.h> |
| 245 | 27 |
| 0 | 28 #include "checkwait_smtpreply.h" |
| 29 #include "config.h" | |
| 245 | 30 #include "memory.h" |
| 591 | 31 #include "mygetline.h" |
| 0 | 32 |
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33 |
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34 char *checkwait_smtpreply(int sockfd, int replytype) |
| 0 | 35 { |
| 591 | 36 char *smtpreply; |
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37 |
| 591 | 38 smtpreply = mygetline(sockfd); |
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39 if(smtpreply == NULL) { |
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40 /* This will never be a valid SMTP response so will always be returned, |
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41 * but is more descriptive than an empty string. */ |
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42 smtpreply = mystrdup("none / error / closed connection"); |
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43 } |
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44 |
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45 #if 0 |
| 0 | 46 printf("replytype = [%d], smtpreply = [%s]\n", replytype, smtpreply); |
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47 fprintf(stderr, "%s", smtpreply); |
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48 #endif |
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49 |
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50 /* This case might seem like (and is ATM) total overkill. But it's |
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51 * easy for us to extend it later on if needed. |
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52 */ |
| 0 | 53 switch(replytype) { |
| 504 | 54 case MLMMJ_CONNECT: |
| 55 if(smtpreply[0] != '2' || smtpreply[1] != '2') | |
| 595 | 56 return smtpreply; |
| 504 | 57 break; |
| 58 case MLMMJ_HELO: | |
| 59 if(smtpreply[0] != '2' || smtpreply[1] != '5') | |
| 595 | 60 return smtpreply; |
| 504 | 61 break; |
| 62 case MLMMJ_FROM: | |
| 63 if(smtpreply[0] != '2' || smtpreply[1] != '5') | |
| 595 | 64 return smtpreply; |
| 504 | 65 break; |
| 66 case MLMMJ_RCPTTO: | |
| 67 if(smtpreply[0] != '2' || smtpreply[1] != '5') | |
| 595 | 68 return smtpreply; |
| 504 | 69 break; |
| 70 case MLMMJ_DATA: | |
| 71 if(smtpreply[0] != '3' || smtpreply[1] != '5') | |
| 595 | 72 return smtpreply; |
| 504 | 73 break; |
| 74 case MLMMJ_DOT: | |
| 75 if(smtpreply[0] != '2' || smtpreply[1] != '5') | |
| 595 | 76 return smtpreply; |
| 504 | 77 break; |
| 78 case MLMMJ_QUIT: | |
| 79 if(smtpreply[0] != '2' || smtpreply[1] != '2') | |
| 595 | 80 return smtpreply; |
| 504 | 81 break; |
| 82 case MLMMJ_RSET: | |
| 83 if(smtpreply[0] != '2' || smtpreply[1] != '5') | |
| 595 | 84 return smtpreply; |
| 504 | 85 break; |
| 86 default: | |
| 87 break; | |
| 0 | 88 } |
| 89 | |
| 595 | 90 myfree(smtpreply); |
| 91 | |
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92 return NULL; |
| 0 | 93 } |