diff options
author | ume <ume@FreeBSD.org> | 2002-07-24 18:58:32 +0000 |
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committer | ume <ume@FreeBSD.org> | 2002-07-24 18:58:32 +0000 |
commit | 11795efea74b7dfde0f7363cdcb4ae25d4cf7581 (patch) | |
tree | cb129e1422ea00a875a95742e2a18076439115fc /lib/libc/net/getnameinfo.c | |
parent | aa7e4582e3a7507214f9120efffbcdee5c6f6914 (diff) | |
download | FreeBSD-src-11795efea74b7dfde0f7363cdcb4ae25d4cf7581.zip FreeBSD-src-11795efea74b7dfde0f7363cdcb4ae25d4cf7581.tar.gz |
- ntohs() returns unsigned value.
- use strlcpy.
- snprintf can return negative value, so cope with it.
- tweak interface index on interface locals (ff01::/16).
- removed unused macros.
- removed a macro that uses only once (in a trivial context).
- explicitly say goodbye to ENI_xxx.
- constify struct afd.
Obtained from: KAME
MFC after: 1 week
Diffstat (limited to 'lib/libc/net/getnameinfo.c')
-rw-r--r-- | lib/libc/net/getnameinfo.c | 115 |
1 files changed, 56 insertions, 59 deletions
diff --git a/lib/libc/net/getnameinfo.c b/lib/libc/net/getnameinfo.c index 1a1c6df..cee07f6 100644 --- a/lib/libc/net/getnameinfo.c +++ b/lib/libc/net/getnameinfo.c @@ -1,4 +1,4 @@ -/* $KAME: getnameinfo.c,v 1.45 2000/09/25 22:43:56 itojun Exp $ */ +/* $KAME: getnameinfo.c,v 1.61 2002/06/27 09:25:47 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. @@ -58,12 +58,7 @@ __FBSDID("$FreeBSD$"); #include <stddef.h> #include <errno.h> -#define SUCCESS 0 -#define ANY 0 -#define YES 1 -#define NO 0 - -static struct afd { +static const struct afd { int a_af; int a_addrlen; int a_socklen; @@ -86,19 +81,10 @@ struct sockinet { #ifdef INET6 static int ip6_parsenumeric(const struct sockaddr *, const char *, char *, - size_t, int); + size_t, int); static int ip6_sa2str(const struct sockaddr_in6 *, char *, size_t, int); #endif -/* 2553bis: use EAI_xx for getnameinfo */ -#define ENI_NOSOCKET EAI_FAIL /*XXX*/ -#define ENI_NOSERVNAME EAI_NONAME -#define ENI_NOHOSTNAME EAI_NONAME -#define ENI_MEMORY EAI_MEMORY -#define ENI_SYSTEM EAI_SYSTEM -#define ENI_FAMILY EAI_FAMILY -#define ENI_SALEN EAI_FAMILY - int getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) const struct sockaddr *sa; @@ -109,7 +95,7 @@ getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) size_t servlen; int flags; { - struct afd *afd; + const struct afd *afd; struct servent *sp; struct hostent *hp; u_short port; @@ -121,23 +107,23 @@ getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) char numaddr[512]; if (sa == NULL) - return ENI_NOSOCKET; + return EAI_FAIL; if (sa->sa_len != salen) - return ENI_SALEN; - + return EAI_FAIL; + family = sa->sa_family; for (i = 0; afdl[i].a_af; i++) if (afdl[i].a_af == family) { afd = &afdl[i]; goto found; } - return ENI_FAMILY; - + return EAI_FAMILY; + found: if (salen != afd->a_socklen) - return ENI_SALEN; - + return EAI_FAIL; + /* network byte order */ port = ((const struct sockinet *)sa)->si_port; addr = (const char *)sa + afd->a_off; @@ -146,8 +132,8 @@ getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) /* * do nothing in this case. * in case you are wondering if "&&" is more correct than - * "||" here: RFC2553 says that serv == NULL OR servlen == 0 - * means that the caller does not want the result. + * "||" here: rfc2553bis-03 says that serv == NULL OR + * servlen == 0 means that the caller does not want the result. */ } else { if (flags & NI_NUMERICSERV) @@ -158,13 +144,13 @@ getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) } if (sp) { if (strlen(sp->s_name) + 1 > servlen) - return ENI_MEMORY; - strcpy(serv, sp->s_name); + return EAI_MEMORY; + strlcpy(serv, sp->s_name, servlen); } else { - snprintf(numserv, sizeof(numserv), "%d", ntohs(port)); + snprintf(numserv, sizeof(numserv), "%u", ntohs(port)); if (strlen(numserv) + 1 > servlen) - return ENI_MEMORY; - strcpy(serv, numserv); + return EAI_MEMORY; + strlcpy(serv, numserv, servlen); } } @@ -208,15 +194,15 @@ getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) /* * do nothing in this case. * in case you are wondering if "&&" is more correct than - * "||" here: RFC2553 says that host == NULL OR hostlen == 0 - * means that the caller does not want the result. + * "||" here: rfc2553bis-03 says that host == NULL or + * hostlen == 0 means that the caller does not want the result. */ } else if (flags & NI_NUMERICHOST) { int numaddrlen; /* NUMERICHOST and NAMEREQD conflicts with each other */ if (flags & NI_NAMEREQD) - return ENI_NOHOSTNAME; + return EAI_NONAME; switch(afd->a_af) { #ifdef INET6 @@ -233,11 +219,11 @@ getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) default: if (inet_ntop(afd->a_af, addr, numaddr, sizeof(numaddr)) == NULL) - return ENI_SYSTEM; + return EAI_SYSTEM; numaddrlen = strlen(numaddr); if (numaddrlen + 1 > hostlen) /* don't forget terminator */ - return ENI_MEMORY; - strcpy(host, numaddr); + return EAI_MEMORY; + strlcpy(host, numaddr, hostlen); break; } } else { @@ -258,13 +244,13 @@ getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) #endif if (strlen(hp->h_name) + 1 > hostlen) { freehostent(hp); - return ENI_MEMORY; + return EAI_MEMORY; } - strcpy(host, hp->h_name); + strlcpy(host, hp->h_name, hostlen); freehostent(hp); } else { if (flags & NI_NAMEREQD) - return ENI_NOHOSTNAME; + return EAI_NONAME; switch(afd->a_af) { #ifdef INET6 case AF_INET6: @@ -281,12 +267,12 @@ getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) default: if (inet_ntop(afd->a_af, addr, host, hostlen) == NULL) - return ENI_SYSTEM; + return EAI_SYSTEM; break; } } } - return SUCCESS; + return(0); } #ifdef INET6 @@ -301,30 +287,29 @@ ip6_parsenumeric(sa, addr, host, hostlen, flags) int numaddrlen; char numaddr[512]; - if (inet_ntop(AF_INET6, addr, numaddr, sizeof(numaddr)) - == NULL) - return ENI_SYSTEM; + if (inet_ntop(AF_INET6, addr, numaddr, sizeof(numaddr)) == NULL) + return EAI_SYSTEM; numaddrlen = strlen(numaddr); if (numaddrlen + 1 > hostlen) /* don't forget terminator */ - return ENI_MEMORY; - strcpy(host, numaddr); + return EAI_MEMORY; + strlcpy(host, numaddr, hostlen); if (((const struct sockaddr_in6 *)sa)->sin6_scope_id) { char zonebuf[MAXHOSTNAMELEN]; int zonelen; - /* ip6_sa2str never fails */ zonelen = ip6_sa2str( (const struct sockaddr_in6 *)(const void *)sa, zonebuf, sizeof(zonebuf), flags); if (zonelen < 0) return EAI_MEMORY; if (zonelen + 1 + numaddrlen + 1 > hostlen) - return ENI_MEMORY; - /* construct <numeric-addr><delim><scopeid> */ + return EAI_MEMORY; + + /* construct <numeric-addr><delim><zoneid> */ memcpy(host + numaddrlen + 1, zonebuf, - (size_t)zonelen); + (size_t)zonelen); host[numaddrlen] = SCOPE_DELIMITER; host[numaddrlen + 1 + zonelen] = '\0'; } @@ -340,18 +325,26 @@ ip6_sa2str(sa6, buf, bufsiz, flags) size_t bufsiz; int flags; { - unsigned int ifindex = (unsigned int)sa6->sin6_scope_id; - const struct in6_addr *a6 = &sa6->sin6_addr; + unsigned int ifindex; + const struct in6_addr *a6; + int n; + + ifindex = (unsigned int)sa6->sin6_scope_id; + a6 = &sa6->sin6_addr; #ifdef NI_NUMERICSCOPE - if (flags & NI_NUMERICSCOPE) { - return(snprintf(buf, bufsiz, "%d", sa6->sin6_scope_id)); + if ((flags & NI_NUMERICSCOPE) != 0) { + n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id); + if (n < 0 || n >= bufsiz) + return -1; + else + return n; } #endif /* if_indextoname() does not take buffer size. not a good api... */ - if ((IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6)) && - bufsiz >= IF_NAMESIZE) { + if ((IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6) || + IN6_IS_ADDR_MC_NODELOCAL(a6)) && bufsiz >= IF_NAMESIZE) { char *p = if_indextoname(ifindex, buf); if (p) { return(strlen(p)); @@ -359,6 +352,10 @@ ip6_sa2str(sa6, buf, bufsiz, flags) } /* last resort */ - return(snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id)); + n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id); + if (n < 0 || n >= bufsiz) + return -1; + else + return n; } #endif /* INET6 */ |