[226] | 1 | /* |
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| 2 | * ---------------------------------------------------------------------- |
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| 3 | * Implementation of the Socket class. |
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| 4 | * |
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| 5 | * ====================================================================== |
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| 6 | * AUTHOR: Wei Qiao <qiaow@purdue.edu> |
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| 7 | * Purdue Rendering and Perceptualization Lab (PURPL) |
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| 8 | * |
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| 9 | * Copyright (c) 2004-2006 Purdue Research Foundation |
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| 10 | * |
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| 11 | * See the file "license.terms" for information on usage and |
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| 12 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 13 | * ====================================================================== |
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| 14 | */ |
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| 15 | #include "Socket.h" |
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| 16 | #include "string.h" |
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| 17 | #include <string.h> |
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| 18 | #include <errno.h> |
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| 19 | #include <fcntl.h> |
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| 20 | |
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| 21 | ssize_t writen(int fd, void *vptr, size_t n) ; |
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| 22 | ssize_t readn(int fd, void *vptr, size_t n) ; |
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| 23 | |
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[2796] | 24 | void error(int status, int err, const char *fmt, ... ){ |
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[226] | 25 | va_list ap; |
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| 26 | va_start(ap, fmt); |
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| 27 | //fprintf(stderr, "%s: ", program_name); |
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| 28 | vfprintf(stderr, fmt, ap); |
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| 29 | va_end(ap); |
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| 30 | |
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| 31 | if(err) |
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| 32 | fprintf(stderr, ":%s (%d)\n", strerror(err), err); |
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| 33 | if(status) |
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| 34 | exit(status); |
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| 35 | } |
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| 36 | |
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[834] | 37 | void |
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| 38 | set_address(char *hname, char *sname, struct sockaddr_in *sap, char *protocol) |
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| 39 | { |
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[2796] | 40 | struct servent *sp = NULL; |
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[834] | 41 | struct hostent *hp; |
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| 42 | char *endptr; |
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| 43 | short port; |
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| 44 | |
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| 45 | bzero(sap, sizeof(*sap)); |
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| 46 | sap->sin_family = AF_INET; |
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| 47 | |
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| 48 | if (hname!=NULL) { |
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| 49 | if (!inet_aton(hname, &sap->sin_addr)) { |
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| 50 | hp = gethostbyname(hname); |
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| 51 | if(hp==NULL) { |
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| 52 | error(1, 0, "unknown host: %s\n", hname); |
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| 53 | } |
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| 54 | sap->sin_addr = *(struct in_addr *) hp->h_addr; |
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| 55 | } |
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| 56 | } else { |
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| 57 | sap->sin_addr.s_addr = htonl(INADDR_ANY); |
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[226] | 58 | } |
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[834] | 59 | port = strtol(sname, &endptr, 0); |
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| 60 | if (*endptr=='\0') { |
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| 61 | sap->sin_port = htons(port); |
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| 62 | } else { |
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| 63 | sp = getservbyname(sname, protocol); |
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| 64 | } |
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| 65 | if (sp == NULL) { |
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| 66 | error(1, 0, "unknown service: %s\n", sname); |
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| 67 | } |
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[226] | 68 | } |
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| 69 | |
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| 70 | void parse_GET_string(char *_str, char keys[256][256], char values[256][256], int *count) |
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| 71 | { |
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| 72 | char str[1024]; |
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| 73 | strcpy(str, _str); |
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| 74 | char * pch_amp; |
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[2796] | 75 | |
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[226] | 76 | //printf ("Splitting string \"%s\" in tokens:\n",str); |
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| 77 | pch_amp = strtok (str,"&"); |
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| 78 | //return; |
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| 79 | int k=0; |
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| 80 | while (pch_amp != NULL) |
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| 81 | { |
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| 82 | char keyval[128]; |
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| 83 | strcpy(keyval, pch_amp); |
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| 84 | |
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| 85 | char *valptr = strchr(keyval, '='); |
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| 86 | |
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| 87 | if (valptr!=NULL) |
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| 88 | { |
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| 89 | *valptr='\0'; |
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| 90 | valptr++; |
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| 91 | |
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| 92 | strcpy(keys[k], keyval); |
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| 93 | strcpy(values[k], valptr); |
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| 94 | } |
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| 95 | else |
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| 96 | { |
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| 97 | strcpy(keys[k], keyval); |
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| 98 | strcpy(values[k], ""); |
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| 99 | } |
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| 100 | //printf("Key - :%s:, Value - :%s:\n", keys[k], values[k]); |
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| 101 | pch_amp = strtok (NULL, "&"); |
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| 102 | k++; |
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| 103 | } |
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| 104 | *count = k; |
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| 105 | } |
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| 106 | |
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| 107 | |
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| 108 | |
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| 109 | Socket::Socket() : |
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| 110 | m_sock ( -1 ) |
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| 111 | { |
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| 112 | |
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| 113 | memset ( &m_addr, |
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| 114 | 0, |
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| 115 | sizeof ( m_addr ) ); |
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| 116 | |
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| 117 | } |
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| 118 | |
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| 119 | Socket::~Socket() |
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| 120 | { |
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| 121 | if ( is_valid() ) |
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| 122 | ::close ( m_sock ); |
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| 123 | } |
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| 124 | |
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| 125 | bool Socket::create() |
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| 126 | { |
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| 127 | m_sock = socket ( AF_INET, |
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| 128 | SOCK_STREAM, |
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| 129 | 0 ); |
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| 130 | |
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| 131 | if ( ! is_valid() ) |
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| 132 | return false; |
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| 133 | |
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| 134 | |
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| 135 | // TIME_WAIT - argh |
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| 136 | int on = 1; |
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| 137 | if ( setsockopt ( m_sock, SOL_SOCKET, SO_REUSEADDR, ( const char* ) &on, sizeof ( on ) ) == -1 ) |
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| 138 | return false; |
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| 139 | |
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| 140 | |
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| 141 | return true; |
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| 142 | |
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| 143 | } |
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| 144 | |
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| 145 | |
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| 146 | |
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| 147 | bool Socket::bind ( const int port ) |
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| 148 | { |
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| 149 | |
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| 150 | if ( ! is_valid() ) |
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| 151 | { |
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| 152 | return false; |
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| 153 | } |
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| 154 | |
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| 155 | m_addr.sin_family = AF_INET; |
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| 156 | m_addr.sin_addr.s_addr = INADDR_ANY; |
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| 157 | m_addr.sin_port = htons ( port ); |
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| 158 | |
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| 159 | int bind_return = ::bind ( m_sock, |
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| 160 | ( struct sockaddr * ) &m_addr, |
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| 161 | sizeof ( m_addr ) ); |
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| 162 | |
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| 163 | |
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| 164 | if ( bind_return == -1 ) |
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| 165 | { |
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| 166 | return false; |
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| 167 | } |
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| 168 | |
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| 169 | return true; |
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| 170 | } |
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| 171 | |
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| 172 | |
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| 173 | bool Socket::listen() const |
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| 174 | { |
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| 175 | if ( ! is_valid() ) |
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| 176 | { |
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| 177 | return false; |
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| 178 | } |
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| 179 | |
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| 180 | //printf("socket:listen:1\n"); |
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| 181 | //fflush(stdout); |
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| 182 | int listen_return = ::listen ( m_sock, MAXCONNECTIONS ); |
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| 183 | //printf("socket:listen:2\n"); |
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| 184 | //fflush(stdout); |
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| 185 | |
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| 186 | |
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| 187 | if ( listen_return == -1 ) |
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| 188 | { |
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| 189 | return false; |
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| 190 | } |
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| 191 | |
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| 192 | return true; |
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| 193 | } |
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| 194 | |
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| 195 | |
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| 196 | bool Socket::accept ( Socket& new_socket ) const |
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| 197 | { |
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| 198 | int addr_length = sizeof ( m_addr ); |
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| 199 | new_socket.m_sock = ::accept ( m_sock, ( sockaddr * ) &m_addr, ( socklen_t * ) &addr_length ); |
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| 200 | |
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| 201 | if ( new_socket.m_sock <= 0 ) |
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| 202 | return false; |
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| 203 | else |
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| 204 | return true; |
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| 205 | } |
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| 206 | |
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| 207 | |
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| 208 | bool Socket::send ( const std::string s ) const |
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| 209 | { |
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| 210 | int status = ::send ( m_sock, s.c_str(), s.size(), MSG_NOSIGNAL ); |
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| 211 | if ( status == -1 ) |
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| 212 | { |
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| 213 | return false; |
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| 214 | } |
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| 215 | else |
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| 216 | { |
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| 217 | return true; |
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| 218 | } |
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| 219 | } |
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| 220 | |
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| 221 | |
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| 222 | bool Socket::send (char* s, int size) const |
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| 223 | { |
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| 224 | //int status = ::send ( m_sock, s, size, MSG_NOSIGNAL ); |
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| 225 | |
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| 226 | int status = writen(m_sock, s, size); |
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| 227 | if ( status == -1 ) |
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| 228 | { |
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| 229 | return false; |
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| 230 | } |
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| 231 | else |
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| 232 | { |
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| 233 | return true; |
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| 234 | } |
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| 235 | } |
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| 236 | |
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| 237 | |
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| 238 | int Socket::recv ( std::string& s ) const |
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| 239 | { |
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| 240 | char buf [ MAXRECV + 1 ]; |
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| 241 | |
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| 242 | s = ""; |
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| 243 | |
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| 244 | memset ( buf, 0, MAXRECV + 1 ); |
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| 245 | int status = ::recv ( m_sock, buf, MAXRECV, 0 ); |
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| 246 | |
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| 247 | if ( status == -1 ) |
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| 248 | { |
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| 249 | std::cout << "status == -1 errno == " << errno << " in Socket::recv\n"; |
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| 250 | return 0; |
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| 251 | } |
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| 252 | else if ( status == 0 ) |
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| 253 | { |
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| 254 | return 0; |
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| 255 | } |
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| 256 | else |
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| 257 | { |
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| 258 | s = buf; |
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| 259 | return status; |
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| 260 | } |
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| 261 | } |
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| 262 | |
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| 263 | |
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| 264 | int Socket::recv (char* s, int size) const |
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| 265 | { |
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| 266 | |
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| 267 | //int status = ::recv ( m_sock, s, size, 0 ); |
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| 268 | int status = readn( m_sock, s, size); |
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| 269 | |
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| 270 | if ( status == -1 ) |
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| 271 | { |
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| 272 | std::cout << "status == -1 errno == " << errno << " in Socket::recv\n"; |
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| 273 | return 0; |
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| 274 | } |
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| 275 | else if ( status == 0 ) |
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| 276 | { |
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| 277 | return 0; |
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| 278 | } |
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| 279 | else |
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| 280 | { |
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| 281 | return status; |
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| 282 | } |
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| 283 | } |
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| 284 | |
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| 285 | |
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| 286 | bool Socket::connect ( const std::string host, const int port ) |
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| 287 | { |
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| 288 | if ( ! is_valid() ) return false; |
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| 289 | |
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| 290 | m_addr.sin_family = AF_INET; |
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| 291 | m_addr.sin_port = htons ( port ); |
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| 292 | |
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| 293 | int status = inet_pton ( AF_INET, host.c_str(), &m_addr.sin_addr ); |
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| 294 | |
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| 295 | if ( errno == EAFNOSUPPORT ) return false; |
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| 296 | |
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| 297 | status = ::connect ( m_sock, ( sockaddr * ) &m_addr, sizeof ( m_addr ) ); |
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| 298 | |
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| 299 | if ( status == 0 ) |
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| 300 | return true; |
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| 301 | else |
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| 302 | return false; |
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| 303 | } |
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| 304 | |
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| 305 | void Socket::set_non_blocking ( const bool b ) |
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| 306 | { |
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| 307 | |
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| 308 | int opts; |
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| 309 | |
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| 310 | opts = fcntl ( m_sock, |
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| 311 | F_GETFL ); |
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| 312 | |
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| 313 | if ( opts < 0 ) |
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| 314 | { |
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| 315 | return; |
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| 316 | } |
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| 317 | |
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| 318 | if ( b ) |
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| 319 | opts = ( opts | O_NONBLOCK ); |
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| 320 | else |
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| 321 | opts = ( opts & ~O_NONBLOCK ); |
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| 322 | |
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| 323 | fcntl ( m_sock, |
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| 324 | F_SETFL,opts ); |
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| 325 | |
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| 326 | } |
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| 327 | |
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| 328 | ssize_t readn(int fd, void *vptr, size_t n) |
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| 329 | { |
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| 330 | size_t nleft; |
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| 331 | ssize_t nread; |
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| 332 | char* ptr; |
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| 333 | |
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| 334 | ptr = (char*) vptr; |
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| 335 | nleft = n; |
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| 336 | |
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| 337 | while(nleft > 0){ |
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| 338 | if((nread=read(fd, ptr, nleft))<0){ |
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| 339 | if(errno==EINTR) |
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| 340 | nread = 0; |
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| 341 | else |
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| 342 | return(-1); |
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| 343 | } |
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| 344 | else if(nread==0){ |
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| 345 | fprintf(stderr, "socket::readn nread==0\n"); |
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| 346 | break; |
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| 347 | } |
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| 348 | |
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| 349 | nleft -= nread; |
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| 350 | ptr += nread; |
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| 351 | } |
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| 352 | |
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| 353 | return (n-nleft); //return n>=0 |
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| 354 | } |
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| 355 | |
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| 356 | |
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| 357 | ssize_t writen(int fd, void *vptr, size_t n) |
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| 358 | { |
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| 359 | size_t nleft; |
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| 360 | ssize_t nwritten; |
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| 361 | const char* ptr; |
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| 362 | |
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| 363 | ptr = (char*) vptr; |
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| 364 | nleft = n; |
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| 365 | |
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| 366 | while(nleft > 0){ |
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| 367 | if((nwritten=write(fd, ptr, nleft))<=0){ |
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| 368 | if(errno==EINTR) |
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| 369 | nwritten = 0; |
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| 370 | else |
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| 371 | return(-1); |
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| 372 | } |
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| 373 | nleft -= nwritten; |
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| 374 | ptr += nwritten; |
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| 375 | } |
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| 376 | |
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| 377 | return (n); |
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| 378 | } |
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