diff options
Diffstat (limited to 'libc/inet')
| -rw-r--r-- | libc/inet/resolv.c | 33 |
1 files changed, 26 insertions, 7 deletions
diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c index 6388db4c3..7dc5bc51e 100644 --- a/libc/inet/resolv.c +++ b/libc/inet/resolv.c @@ -45,6 +45,11 @@ * 2-Feb-2002 Erik Andersen <andersee@debian.org> * Added gethostent(), sethostent(), and endhostent() * + * 17-Aug-2002 Manuel Novoa III <mjn3@codepoet.org> + * Fixed __read_etc_hosts_r to return alias list, and modified buffer + * allocation accordingly. See MAX_ALIASES and ALIAS_DIM below. + * This fixes the segfault in the Python 2.2.1 socket test. + * */ #define __FORCE_GLIBC @@ -73,6 +78,11 @@ #define MAX_SERVERS 3 #define MAX_SEARCH 4 +#define MAX_ALIASES 5 + +/* 1:ip + 1:full + MAX_ALIASES:aliases + 1:NULL */ +#define ALIAS_DIM (2 + MAX_ALIASES + 1) + #undef DEBUG /*#define DEBUG*/ @@ -910,7 +920,7 @@ struct hostent *gethostbyname(const char *name) static struct hostent h; static char buf[sizeof(struct in_addr) + sizeof(struct in_addr *)*2 + - 256/*namebuffer*/ + 32/* margin */]; + sizeof(char *)*(ALIAS_DIM) + 256/*namebuffer*/ + 32/* margin */]; struct hostent *hp; gethostbyname_r(name, &h, buf, sizeof(buf), &hp, &h_errno); @@ -937,7 +947,7 @@ struct hostent *gethostbyname2(const char *name, int family) static struct hostent h; static char buf[sizeof(struct in6_addr) + sizeof(struct in6_addr *)*2 + - 256/*namebuffer*/ + 32/* margin */]; + sizeof(char *)*(ALIAS_DIM) + 256/*namebuffer*/ + 32/* margin */]; struct hostent *hp; gethostbyname2_r(name, family, &h, buf, sizeof(buf), &hp, &h_errno); @@ -1067,7 +1077,6 @@ int res_query(const char *dname, int class, int type, } #endif - #ifdef L_gethostbyaddr struct hostent *gethostbyaddr (const void *addr, socklen_t len, int type) { @@ -1078,7 +1087,7 @@ struct hostent *gethostbyaddr (const void *addr, socklen_t len, int type) #else sizeof(struct in6_addr) + sizeof(struct in6_addr *)*2 + #endif /* __UCLIBC_HAS_IPV6__ */ - 256/*namebuffer*/ + 32/* margin */]; + sizeof(char *)*(ALIAS_DIM) + 256/*namebuffer*/ + 32/* margin */]; struct hostent *hp; gethostbyaddr_r(addr, len, type, &h, buf, sizeof(buf), &hp, &h_errno); @@ -1112,11 +1121,16 @@ int __read_etc_hosts_r(FILE * fp, const char * name, int type, struct in6_addr **addr_list6=NULL; #endif /* __UCLIBC_HAS_IPV6__ */ char *cp; -#define MAX_ALIAS 5 - char *alias[MAX_ALIAS]; + char **alias; int aliases, i; int ret=HOST_NOT_FOUND; + if (buflen < sizeof(char *)*(ALIAS_DIM)) + return ERANGE; + alias=(char **)buf; + buf+=sizeof(char **)*(ALIAS_DIM); + buflen-=sizeof(char **)*(ALIAS_DIM); + if (action!=GETHOSTENT) { #ifdef __UCLIBC_HAS_IPV6__ char *p=buf; @@ -1153,6 +1167,7 @@ int __read_etc_hosts_r(FILE * fp, const char * name, int type, buf=p; } #endif /* __UCLIBC_HAS_IPV6__ */ + if (buflen < 80) return ERANGE; @@ -1176,11 +1191,12 @@ int __read_etc_hosts_r(FILE * fp, const char * name, int type, *cp++ = '\0'; if (!*cp) continue; - if (aliases < MAX_ALIAS) + if (aliases < (2+MAX_ALIASES)) alias[aliases++] = cp; while (*cp && !isspace(*cp)) cp++; } + alias[aliases] = 0; if (aliases < 2) continue; /* syntax error really */ @@ -1208,6 +1224,7 @@ int __read_etc_hosts_r(FILE * fp, const char * name, int type, result_buf->h_addrtype = AF_INET; result_buf->h_length = sizeof(*in); result_buf->h_addr_list = (char**) addr_list; + result_buf->h_aliases = alias + 2; *result=result_buf; ret=NETDB_SUCCESS; #ifdef __UCLIBC_HAS_IPV6__ @@ -1219,6 +1236,7 @@ int __read_etc_hosts_r(FILE * fp, const char * name, int type, result_buf->h_addrtype = AF_INET6; result_buf->h_length = sizeof(*in6); result_buf->h_addr_list = (char**) addr_list6; + result_buf->h_aliases = alias + 2; *result=result_buf; ret=NETDB_SUCCESS; #endif /* __UCLIBC_HAS_IPV6__ */ @@ -1282,6 +1300,7 @@ struct hostent *gethostent (void) #else sizeof(struct in6_addr) + sizeof(struct in6_addr *)*2 + #endif /* __UCLIBC_HAS_IPV6__ */ + sizeof(char *)*(ALIAS_DIM) + 80/*namebuffer*/ + 2/* margin */]; struct hostent *host; |