Mercurial > masqmail
annotate src/mservdetect.c @ 238:ec28ce798b79
minor improvements in wordings
| author | markus schnalke <meillo@marmaro.de> |
|---|---|
| date | Mon, 25 Oct 2010 14:02:18 -0300 |
| parents | bfa7a8b566da |
| children | 41958685480d |
| rev | line source |
|---|---|
| 0 | 1 /* MasqMail |
| 2 Copyright (C) 1999-2001 Oliver Kurth | |
| 187 | 3 Copyright (C) 2010 markus schnalke <meillo@marmaro.de> |
| 0 | 4 |
| 5 This program is free software; you can redistribute it and/or modify | |
| 6 it under the terms of the GNU General Public License as published by | |
| 7 the Free Software Foundation; either version 2 of the License, or | |
| 8 (at your option) any later version. | |
| 9 | |
| 10 This program is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 GNU General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 16 along with this program; if not, write to the Free Software | |
| 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 18 */ | |
| 19 | |
| 20 | |
| 21 #include "masqmail.h" | |
| 22 #include "readsock.h" | |
| 164 | 23 |
| 24 | |
| 187 | 25 gboolean |
|
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26 init_sockaddr2(struct sockaddr_in * name, gchar* addr, int port) |
| 187 | 27 { |
| 28 struct hostent *he; | |
| 29 struct in_addr ia; | |
| 30 | |
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31 if (inet_aton(addr, &ia) != 0) { |
| 187 | 32 /* IP address */ |
| 33 memcpy(&(name->sin_addr), &ia, sizeof(name->sin_addr)); | |
| 34 } else { | |
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35 if ((he = gethostbyname(addr)) == NULL) { |
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36 fprintf(stderr, "local address '%s' unknown. (deleting)\n", addr); |
| 187 | 37 return FALSE; |
| 38 } | |
| 39 memcpy(&(name->sin_addr), he->h_addr, sizeof(name->sin_addr)); | |
| 40 } | |
| 41 name->sin_family = AF_INET; | |
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42 name->sin_port = htons(port); |
| 187 | 43 |
| 44 return TRUE; | |
| 45 } | |
| 46 | |
| 47 | |
| 164 | 48 gchar* |
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49 mserver_detect_online(gchar* addr, int port) |
| 164 | 50 { |
| 51 struct sockaddr_in saddr; | |
| 52 gchar *ret = NULL; | |
| 53 | |
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54 if (!init_sockaddr2(&saddr, addr, port)) { |
| 187 | 55 return NULL; |
| 56 } | |
| 57 | |
| 58 int sock = socket(PF_INET, SOCK_STREAM, 0); | |
| 59 int dup_sock; | |
| 60 if (connect(sock, (struct sockaddr *) (&saddr), sizeof(saddr)) != 0) { | |
| 61 return NULL; | |
| 62 } | |
| 164 | 63 |
| 187 | 64 FILE *in, *out; |
| 65 char buf[256]; | |
| 66 | |
| 67 dup_sock = dup(sock); | |
| 68 out = fdopen(sock, "w"); | |
| 69 in = fdopen(dup_sock, "r"); | |
| 70 | |
| 71 if (!read_sockline(in, buf, 256, 15, READSOCKL_CHUG)) { | |
| 72 return NULL; | |
| 73 } | |
| 164 | 74 |
| 187 | 75 /* this is the protocol (reverse engineered): |
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76 |
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77 S: READY |
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78 C: STAT |
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79 | |
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80 +----------------+-----------------+ |
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81 | | | |
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82 S: DOWN S: UP foo:-1 S: UP foo:1 |
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83 C: QUIT C: QUIT C: QUIT |
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84 |
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85 -> offline -> offline -> online |
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86 `foo' gets printed |
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87 |
| 187 | 88 */ |
| 89 | |
| 90 if (strncmp(buf, "READY", 5) == 0) { | |
| 91 fprintf(out, "STAT\n"); | |
| 92 fflush(out); | |
| 93 if (read_sockline(in, buf, 256, 15, READSOCKL_CHUG)) { | |
| 94 if (strncmp(buf, "DOWN", 4) == 0) { | |
| 95 ret = NULL; | |
| 96 } else if (strncmp(buf, "UP", 2) == 0) { | |
| 97 gchar *p = buf + 3; | |
| 98 while ((*p != ':') && *p) { | |
| 99 p++; | |
| 100 } | |
| 101 if (*p) { | |
| 102 *p = '\0'; | |
| 103 p++; | |
| 104 if ((atoi(p) >= 0) && *p) { | |
| 105 /* `UP foo:N', where `N' is a non-negative number */ | |
| 106 ret = g_strdup(buf + 3); | |
| 164 | 107 } |
| 187 | 108 } else { |
| 109 fprintf(stderr, "unexpected response from mserver after STAT cmd: %s", buf); | |
| 164 | 110 } |
| 187 | 111 } else { |
| 112 fprintf(stderr, "unexpected response from mserver after STAT cmd: %s", buf); | |
| 164 | 113 } |
| 114 } | |
| 115 } | |
| 187 | 116 fprintf(out, "QUIT"); |
| 117 fflush(out); | |
| 118 | |
| 119 close(sock); | |
| 120 close(dup_sock); | |
| 121 fclose(in); | |
| 122 fclose(out); | |
| 123 | |
| 164 | 124 return ret; |
| 125 } | |
| 126 | |
| 0 | 127 |
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128 int |
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129 main(int argc, char *argv[]) |
| 0 | 130 { |
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131 gchar* addr; |
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132 int port; |
| 187 | 133 gchar *name; |
| 0 | 134 |
| 187 | 135 if (argc != 3) { |
| 136 fprintf(stderr, "usage: %s HOST PORT\n", argv[0]); | |
| 137 return 1; | |
| 138 } | |
| 0 | 139 |
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140 addr = argv[1]; |
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141 port = atoi(argv[2]); |
| 187 | 142 |
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143 name = mserver_detect_online(addr, port); |
| 0 | 144 |
| 187 | 145 if (name) { |
| 146 printf("%s\n", name); | |
| 147 return 0; | |
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148 } |
| 187 | 149 return 1; |
| 0 | 150 } |