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/* $OpenBSD: util.c,v 1.2 2015/08/27 01:02:35 yasuoka Exp $ */ |
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/* |
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* Copyright (c) 2013 Internet Initiative Japan Inc. |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <netdb.h> |
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#include <string.h> |
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#include <stdio.h> |
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#include "util.h" |
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/* |
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* Convert argument like "192.168.160.1:1723/tcp" or "[::1]:1723/tcp" to |
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* match getaddrinfo(3)'s specification and pass them to getaddrinfo(3). |
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*/ |
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int |
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addrport_parse(const char *addrport, int proto, struct addrinfo **p_ai) |
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{ |
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char *servp, *nodep, *slash, buf[256]; |
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struct addrinfo hints; |
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strlcpy(buf, addrport, sizeof(buf)); |
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if (buf[0] == '[' && (servp = strchr(buf, ']')) != NULL) { |
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nodep = buf + 1; |
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*servp++ = '\0'; |
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if (*servp != ':') |
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servp = NULL; |
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} else { |
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nodep = buf; |
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servp = strrchr(nodep, ':'); |
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} |
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if (servp != NULL) { |
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*servp = '\0'; |
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servp++; |
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slash = strrchr(servp, '/'); |
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if (slash != NULL) { |
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/* |
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* Ignore like "/tcp" |
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*/ |
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*slash = '\0'; |
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slash++; |
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} |
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} else |
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servp = NULL; |
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memset(&hints, 0, sizeof(hints)); |
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hints.ai_flags = AI_NUMERICHOST; |
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hints.ai_family = AF_UNSPEC; |
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switch (proto) { |
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case IPPROTO_TCP: |
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hints.ai_socktype = SOCK_STREAM; |
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break; |
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case IPPROTO_UDP: |
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hints.ai_socktype = SOCK_DGRAM; |
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break; |
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} |
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hints.ai_protocol = proto; |
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return (getaddrinfo(nodep, servp, &hints, p_ai)); |
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} |
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/* |
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* Make a string like "192.168.160.1:1723" or "[::1]:1723" from a struct |
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* sockaddr |
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*/ |
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const char * |
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addrport_tostring(struct sockaddr *sa, socklen_t salen, char *buf, size_t lbuf) |
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{ |
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char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV]; |
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int ret; |
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if (getnameinfo(sa, salen, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), |
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NI_NUMERICHOST | NI_NUMERICSERV) != 0) |
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return (NULL); |
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switch (sa->sa_family) { |
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case AF_INET6: |
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ret = snprintf(buf, lbuf, "[%s]:%s", hbuf, sbuf); |
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break; |
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case AF_INET: |
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ret = snprintf(buf, lbuf, "%s:%s", hbuf, sbuf); |
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break; |
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default: |
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return "error"; |
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} |
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if (ret == -1 || ret >= (int)lbuf) |
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return "(error)"; |
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return (buf); |
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} |