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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | /* vi: set sw=4 ts=4: */ /* * Copyright (C) 2010 Bernhard Reutner-Fischer <uclibc@uclibc.org> * * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball. */ /* /etc/protocols # protocol-name number [aliases ...] ip 0 IP # internet protocol, pseudo protocol number protocol-name: case sensitive friendly name of the IP protocol number: decimal protocol number aliases: case sensitive optional space or tab separated list of other names */ #include <features.h> #include <netdb.h> #include <string.h> #include <stdlib.h> #include <netinet/in.h> #include <arpa/inet.h> #include <errno.h> #include <unistd.h> #include "internal/parse_config.h" #include <bits/uClibc_mutex.h> __UCLIBC_MUTEX_STATIC(mylock, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP); #define MINTOKENS 2 #define MAXALIASES 8 /* will probably never be more than one */ #define MAXTOKENS (MINTOKENS + MAXALIASES + 1) #define BUFSZ (255) /* one line */ #define SBUFSIZE (BUFSZ + 1 + (sizeof(char *) * MAXTOKENS)) static parser_t *protop = NULL; static struct protoent protoe; static char *protobuf = NULL; static smallint proto_stayopen; void setprotoent(int stayopen) { __UCLIBC_MUTEX_LOCK(mylock); if (protop) config_close(protop); protop = config_open(_PATH_PROTOCOLS); if (stayopen) proto_stayopen = 1; __UCLIBC_MUTEX_UNLOCK(mylock); } libc_hidden_def(setprotoent) void endprotoent(void) { __UCLIBC_MUTEX_LOCK(mylock); if (protop) { config_close(protop); protop = NULL; } proto_stayopen = 0; __UCLIBC_MUTEX_UNLOCK(mylock); } libc_hidden_def(endprotoent) int getprotoent_r(struct protoent *result_buf, char *buf, size_t buflen, struct protoent **result) { char **tok = NULL; const size_t aliaslen = sizeof(char *) * MAXTOKENS; int ret = ERANGE; *result = NULL; if (buflen < aliaslen || (buflen - aliaslen) < BUFSZ + 1) goto DONE_NOUNLOCK; __UCLIBC_MUTEX_LOCK(mylock); //tok = (char **) buf; ret = ENOENT; if (protop == NULL) setprotoent(proto_stayopen); if (protop == NULL) goto DONE; protop->data = buf; protop->data_len = aliaslen; protop->line_len = buflen - aliaslen; /* <name>[[:space:]]<protonumber>[[:space:]][<aliases>] */ if (!config_read(protop, &tok, MAXTOKENS - 1, MINTOKENS, "# \t/", PARSE_NORMAL)) { goto DONE; } result_buf->p_name = *(tok++); result_buf->p_proto = atoi(*(tok++)); result_buf->p_aliases = tok; *result = result_buf; ret = 0; DONE: __UCLIBC_MUTEX_UNLOCK(mylock); DONE_NOUNLOCK: errno = ret; return errno; } libc_hidden_def(getprotoent_r) static void __initbuf(void) { if (!protobuf) { protobuf = malloc(SBUFSIZE); if (!protobuf) abort(); } } struct protoent *getprotoent(void) { struct protoent *result; __initbuf(); getprotoent_r(&protoe, protobuf, SBUFSIZE, &result); return result; } int getprotobyname_r(const char *name, struct protoent *result_buf, char *buf, size_t buflen, struct protoent **result) { register char **cp; int ret; __UCLIBC_MUTEX_LOCK(mylock); setprotoent(proto_stayopen); while (!(ret = getprotoent_r(result_buf, buf, buflen, result))) { if (strcmp(name, result_buf->p_name) == 0) break; for (cp = result_buf->p_aliases; *cp; cp++) if (strcmp(name, *cp) == 0) goto gotname; } gotname: if (!proto_stayopen) endprotoent(); __UCLIBC_MUTEX_UNLOCK(mylock); return *result ? 0 : ret; } libc_hidden_def(getprotobyname_r) struct protoent *getprotobyname(const char *name) { struct protoent *result; __initbuf(); getprotobyname_r(name, &protoe, protobuf, SBUFSIZE, &result); return result; } int getprotobynumber_r(int proto, struct protoent *result_buf, char *buf, size_t buflen, struct protoent **result) { int ret; __UCLIBC_MUTEX_LOCK(mylock); setprotoent(proto_stayopen); while (!(ret = getprotoent_r(result_buf, buf, buflen, result))) { if (proto == result_buf->p_proto) break; } if (!proto_stayopen) endprotoent(); __UCLIBC_MUTEX_UNLOCK(mylock); return *result ? 0 : ret; } libc_hidden_def(getprotobynumber_r) struct protoent *getprotobynumber(int proto) { struct protoent *result; __initbuf(); getprotobynumber_r(proto, &protoe, protobuf, SBUFSIZE, &result); return result; } |