mirror of https://github.com/postgres/postgres
if the OS supports it. Code will still compile on non-IPv6-aware machines (feature added by Bruce). Nigel KukardWIN32_DEV
Bruce Momjian
23 years ago
parent
d99e7b5a0d
commit
c3e9699f21
@ -0,0 +1,371 @@ |
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/*-------------------------------------------------------------------------
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* |
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* ip.c |
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* Handles IPv6 |
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* |
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* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group |
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* Portions Copyright (c) 1994, Regents of the University of California |
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* |
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* |
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* IDENTIFICATION |
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* $Header: /cvsroot/pgsql/src/backend/libpq/ip.c,v 1.1 2003/01/06 03:18:26 momjian Exp $ |
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* |
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* This file and the IPV6 implementation were initially provided by |
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* Nigel Kukard <nkukard@lbsd.net>, Linux Based Systems Design |
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* http://www.lbsd.net.
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* |
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*------------------------------------------------------------------------- |
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*/ |
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#ifndef FRONTEND |
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#include "postgres.h" |
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#else |
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#include "postgres_fe.h" |
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#endif |
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#include <errno.h> |
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#include <unistd.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/socket.h> |
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#include <netdb.h> |
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#include <netinet/in.h> |
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#ifdef HAVE_NETINET_TCP_H |
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#include <netinet/tcp.h> |
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#endif |
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#include <arpa/inet.h> |
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#include <sys/file.h> |
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#include "libpq/libpq.h" |
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#include "miscadmin.h" |
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#ifdef FRONTEND |
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#define elog fprintf |
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#define LOG stderr |
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#endif |
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#if defined(HAVE_UNIX_SOCKETS) && defined(HAVE_IPV6) |
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static int getaddrinfo_unix(const char *path, const struct addrinfo *hintsp, |
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struct addrinfo **result); |
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#endif /* HAVE_UNIX_SOCKETS */ |
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|
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/*
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* getaddrinfo2 - get address info for Unix, IPv4 and IPv6 sockets |
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*/ |
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int |
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getaddrinfo2(const char *hostname, const char *servname, |
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#ifdef HAVE_IPV6 |
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const struct addrinfo *hintp, struct addrinfo **result) |
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#else |
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int family, SockAddr *result) |
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#endif |
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{ |
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#ifdef HAVE_UNIX_SOCKETS |
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#ifdef HAVE_IPV6 |
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if (hintp != NULL && hintp->ai_family == AF_UNIX) |
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return getaddrinfo_unix(servname, hintp, result); |
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#else |
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if (family == AF_UNIX) |
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return 0; |
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#endif |
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else |
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{ |
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#endif /* HAVE_UNIX_SOCKETS */ |
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#ifdef HAVE_IPV6 |
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/* NULL has special meaning to getaddrinfo */ |
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return getaddrinfo((!hostname || hostname[0] == '\0') ? NULL : hostname, |
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servname, hintp, result); |
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#else |
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if (hostname[0] == '\0') |
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result->in.sin_addr.s_addr = htonl(INADDR_ANY); |
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else |
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{ |
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struct hostent *hp; |
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hp = gethostbyname(hostname); |
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if ((hp == NULL) || (hp->h_addrtype != AF_INET)) |
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{ |
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elog(LOG, "getaddrinfo2: gethostbyname(%s) failed\n", hostname); |
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return STATUS_ERROR; |
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} |
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memmove((char *) &(result->in.sin_addr), (char *) hp->h_addr, |
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hp->h_length); |
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} |
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result->in.sin_port = htons((unsigned short)atoi(servname)); |
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return 0; |
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#endif /* HAVE_IPV6 */ |
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#ifdef HAVE_UNIX_SOCKETS |
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} |
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#endif /* HAVE_UNIX_SOCKETS */ |
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} |
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/*
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* freeaddrinfo2 - free IPv6 addrinfo structures |
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*/ |
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#ifdef HAVE_IPV6 |
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void |
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freeaddrinfo2(int hint_ai_family, struct addrinfo *ai) |
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{ |
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#ifdef HAVE_UNIX_SOCKETS |
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if (hint_ai_family == AF_UNIX) |
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{ |
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struct addrinfo *p; |
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while (ai != NULL) |
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{ |
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p = ai; |
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ai = ai->ai_next; |
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free(p->ai_addr); |
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free(p); |
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} |
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} |
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else |
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#endif /* HAVE_UNIX_SOCKETS */ |
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freeaddrinfo(ai); |
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} |
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#endif |
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#if defined(HAVE_UNIX_SOCKETS) && defined(HAVE_IPV6) |
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/* -------
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* getaddrinfo_unix - get unix socket info using IPv6 |
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* |
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* Bug: only one addrinfo is set even though hintsp is NULL or |
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* ai_socktype is 0 |
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* AI_CANNONNAME does not support. |
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* ------- |
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*/ |
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static int |
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getaddrinfo_unix(const char *path, const struct addrinfo *hintsp, |
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struct addrinfo **result) |
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{ |
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struct addrinfo hints; |
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struct addrinfo *aip; |
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struct sockaddr_un *unp; |
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MemSet(&hints, 0, sizeof(hints)); |
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if (hintsp == NULL) |
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{ |
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hints.ai_family = AF_UNIX; |
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hints.ai_socktype = SOCK_STREAM; |
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} |
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else |
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memcpy(&hints, hintsp, sizeof(hints)); |
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if (hints.ai_socktype == 0) |
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hints.ai_socktype = SOCK_STREAM; |
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if (!(hints.ai_family == AF_UNIX)) |
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{ |
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elog(LOG, "hints.ai_family is invalied getaddrinfo_unix()\n"); |
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return EAI_ADDRFAMILY; |
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} |
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aip = calloc(1, sizeof(struct addrinfo)); |
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if (aip == NULL) |
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return EAI_MEMORY; |
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aip->ai_family = AF_UNIX; |
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aip->ai_socktype = hints.ai_socktype; |
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aip->ai_protocol = hints.ai_protocol; |
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aip->ai_next = NULL; |
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aip->ai_canonname = NULL; |
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*result = aip; |
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unp = calloc(1, sizeof(struct sockaddr_un)); |
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if (aip == NULL) |
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return EAI_MEMORY; |
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unp->sun_family = AF_UNIX; |
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aip->ai_addr = (struct sockaddr *) unp; |
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aip->ai_addrlen = sizeof(struct sockaddr_un); |
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if (strlen(path) >= sizeof(unp->sun_path)) |
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return EAI_SERVICE; |
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strcpy(unp->sun_path, path); |
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#if SALEN |
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unp->sun_len = sizeof(struct sockaddr_un); |
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#endif /* SALEN */ |
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if (hints.ai_flags & AI_PASSIVE) |
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unlink(unp->sun_path); |
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return 0; |
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} |
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#endif /* HAVE_UNIX_SOCKETS && HAVE_IPV6 */ |
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/* ----------
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* SockAddr_ntop - set IP address string from SockAddr |
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* |
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* parameters... sa : SockAddr union |
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* dst : buffer for address string |
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* cnt : sizeof dst |
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* v4conv: non-zero: if address is IPv4 mapped IPv6 address then |
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* convert to IPv4 address. |
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* returns... pointer to dst |
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* if sa.sa_family is not AF_INET or AF_INET6 dst is set as empy string. |
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* ---------- |
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*/ |
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char * |
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SockAddr_ntop(const SockAddr *sa, char *dst, size_t cnt, int v4conv) |
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{ |
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switch (sa->sa.sa_family) |
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{ |
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case AF_INET: |
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#ifdef HAVE_IPV6 |
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inet_ntop(AF_INET, &sa->in.sin_addr, dst, cnt); |
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#else |
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StrNCpy(dst, inet_ntoa(sa->in.sin_addr), cnt); |
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#endif |
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break; |
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#ifdef HAVE_IPV6 |
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case AF_INET6: |
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inet_ntop(AF_INET6, &sa->in6.sin6_addr, dst, cnt); |
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if (v4conv && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) |
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strcpy(dst, dst + 7); |
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break; |
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#endif |
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default: |
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dst[0] = '\0'; |
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break; |
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} |
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return dst; |
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} |
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/*
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* SockAddr_pton - IPv6 pton |
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*/ |
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int |
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SockAddr_pton(SockAddr *sa, const char *src) |
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{ |
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int family = AF_INET; |
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#ifdef HAVE_IPV6 |
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const char *ch; |
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for (ch = src; *ch != '\0'; ch++) |
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{ |
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if (*ch == ':') |
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{ |
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family = AF_INET6; |
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break; |
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} |
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} |
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#endif |
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sa->sa.sa_family = family; |
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switch (family) |
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{ |
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case AF_INET: |
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#ifdef HAVE_IPV6 |
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return inet_pton(AF_INET, src, &sa->in.sin_addr); |
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#else |
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return inet_aton(src, &sa->in.sin_addr); |
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#endif |
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#ifdef HAVE_IPV6 |
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case AF_INET6: |
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return inet_pton(AF_INET6, src, &sa->in6.sin6_addr); |
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break; |
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#endif |
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default: |
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return -1; |
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} |
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} |
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/*
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* isAF_INETx - check to see if sa is AF_INET or AF_INET6 |
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*/ |
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int |
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isAF_INETx(const int family) |
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{ |
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if (family == AF_INET |
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#ifdef HAVE_IPV6 |
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|| family == AF_INET6 |
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#endif |
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) |
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return 1; |
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else |
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return 0; |
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} |
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int |
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rangeSockAddr(const SockAddr *addr, const SockAddr *netaddr, const SockAddr *netmask) |
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{ |
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if (addr->sa.sa_family == AF_INET) |
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return rangeSockAddrAF_INET(addr, netaddr, netmask); |
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#ifdef HAVE_IPV6 |
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else if (addr->sa.sa_family == AF_INET6) |
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return rangeSockAddrAF_INET6(addr, netaddr, netmask); |
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#endif |
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else |
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return 0; |
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} |
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int |
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rangeSockAddrAF_INET(const SockAddr *addr, const SockAddr *netaddr, |
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const SockAddr *netmask) |
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{ |
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if (addr->sa.sa_family != AF_INET || |
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netaddr->sa.sa_family != AF_INET || |
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netmask->sa.sa_family != AF_INET) |
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return 0; |
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if (((addr->in.sin_addr.s_addr ^ netaddr->in.sin_addr.s_addr) & |
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netmask->in.sin_addr.s_addr) == 0) |
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return 1; |
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else |
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return 0; |
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} |
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#ifdef HAVE_IPV6 |
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int |
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rangeSockAddrAF_INET6(const SockAddr *addr, const SockAddr *netaddr, |
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const SockAddr *netmask) |
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{ |
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int i; |
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if (IN6_IS_ADDR_V4MAPPED(&addr->in6.sin6_addr)) |
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{ |
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SockAddr addr4; |
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convSockAddr6to4(addr, &addr4); |
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if (rangeSockAddrAF_INET(&addr4, netaddr, netmask)) |
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return 1; |
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} |
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if (netaddr->sa.sa_family != AF_INET6 || |
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netmask->sa.sa_family != AF_INET6) |
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return 0; |
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for (i = 0; i < 16; i++) |
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{ |
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if (((addr->in6.sin6_addr.s6_addr[i] ^ netaddr->in6.sin6_addr.s6_addr[i]) & |
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netmask->in6.sin6_addr.s6_addr[i]) != 0) |
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return 0; |
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} |
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return 1; |
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} |
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void |
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convSockAddr6to4(const SockAddr *src, SockAddr *dst) |
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{ |
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char addr_str[INET6_ADDRSTRLEN]; |
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dst->in.sin_family = AF_INET; |
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dst->in.sin_port = src->in6.sin6_port; |
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dst->in.sin_addr.s_addr = src->in6.sin6_addr.s6_addr32[3]; |
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SockAddr_ntop(src, addr_str, INET6_ADDRSTRLEN, 0); |
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} |
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#endif |
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@ -0,0 +1,29 @@ |
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#ifndef IP_H |
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#define IP_H |
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#include <sys/socket.h> |
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#include <netdb.h> |
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#include "libpq/pqcomm.h" |
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#ifdef HAVE_IPV6 |
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void freeaddrinfo2(int hint_ai_family, struct addrinfo *ai); |
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int getaddrinfo2(const char *hostname, const char *servname, |
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const struct addrinfo *hintp, struct addrinfo **result); |
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#else |
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int getaddrinfo2(const char *hostname, const char *servname, |
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int family, SockAddr *result); |
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#endif |
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char *SockAddr_ntop(const SockAddr *sa, char *dst, size_t cnt, int v4conv); |
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int SockAddr_pton(SockAddr *sa, const char *src); |
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int isAF_INETx(const int family); |
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int rangeSockAddr(const SockAddr *addr, const SockAddr *netaddr, |
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const SockAddr *netmask); |
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int rangeSockAddrAF_INET(const SockAddr *addr, const SockAddr *netaddr,
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const SockAddr *netmask); |
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#ifdef HAVE_IPV6 |
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int rangeSockAddrAF_INET6(const SockAddr *addr, const SockAddr *netaddr,
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const SockAddr *netmask); |
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void convSockAddr6to4(const SockAddr *src, SockAddr *dst); |
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#endif |
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#endif /* IP_H */ |
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