diff options
Diffstat (limited to 'libc/inet')
| -rw-r--r-- | libc/inet/resolv.c | 67 |
1 files changed, 38 insertions, 29 deletions
diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c index 148fd4a4a..005089e64 100644 --- a/libc/inet/resolv.c +++ b/libc/inet/resolv.c @@ -162,7 +162,7 @@ #define ALIAS_DIM (2 + MAX_ALIASES + 1) #undef DEBUG -/*#define DEBUG*/ +/* #define DEBUG */ #ifdef DEBUG #define DPRINTF(X,args...) fprintf(stderr, X, ##args) @@ -788,8 +788,8 @@ int __dns_lookup(const char *name, int type, int nscount, char **nsip, goto tryall; } - i = recv(fd, packet, 512, 0); - if (i < HFIXEDSZ) { + len = recv(fd, packet, 512, 0); + if (len < HFIXEDSZ) { /* too short ! */ goto again; } @@ -857,7 +857,7 @@ int __dns_lookup(const char *name, int type, int nscount, char **nsip, else free(packet); free(lookup); - return (0); /* success! */ + return (len); /* success! */ tryall: /* if there are other nameservers, give them a go, @@ -904,6 +904,7 @@ fail: free(lookup); if (packet) free(packet); + h_errno = NETDB_INTERNAL; return -1; } #endif @@ -938,7 +939,8 @@ int __open_nameservers() } if ((fp = fopen("/etc/resolv.conf", "r")) || - (fp = fopen("/etc/config/resolv.conf", "r"))) { + (fp = fopen("/etc/config/resolv.conf", "r"))) + { while (fgets(szBuffer, sizeof(szBuffer), fp) != NULL) { @@ -975,12 +977,14 @@ int __open_nameservers() } } fclose(fp); - } else { - DPRINTF("failed to open %s\n", "resolv.conf"); + DPRINTF("nameservers = %d\n", __nameservers); + BIGUNLOCK; + return 0; } - DPRINTF("nameservers = %d\n", __nameservers); + DPRINTF("failed to open %s\n", "resolv.conf"); + h_errno = NO_RECOVERY; BIGUNLOCK; - return 0; + return -1; } #endif @@ -1055,7 +1059,9 @@ int res_init(void) struct __res_state *rp = &(_res); __close_nameservers(); - __open_nameservers(); + if (__open_nameservers()) { + return(-1); + } rp->retrans = RES_TIMEOUT; rp->retry = 4; rp->options = RES_INIT; @@ -1119,10 +1125,10 @@ int res_query(const char *dname, int class, int type, int __nameserversXX; char ** __nameserverXX; - __open_nameservers(); - - if (!dname || class != 1 /* CLASS_IN */) + if (__open_nameservers() || !dname || class != 1 /* CLASS_IN */) { + h_errno = NO_RECOVERY; return(-1); + } memset((char *) &a, '\0', sizeof(a)); @@ -1132,21 +1138,23 @@ int res_query(const char *dname, int class, int type, BIGUNLOCK; i = __dns_lookup(dname, type, __nameserversXX, __nameserverXX, &packet, &a); - if (i < 0) + if (i < 0) { + h_errno = TRY_AGAIN; return(-1); + } free(a.dotted); if (a.atype == type) { /* CNAME*/ - if (anslen && answer) - memcpy(answer, a.rdata, MIN(anslen, a.rdlength)); + int len = MIN(anslen, i); + memcpy(answer, packet, len); if (packet) free(packet); - return(MIN(anslen, a.rdlength)); + return(len); } if (packet) free(packet); - return 0; + return i; } /* @@ -1167,10 +1175,7 @@ int res_search(name, class, type, answer, anslen) int trailing_dot, ret, saved_herrno; int got_nodata = 0, got_servfail = 0, tried_as_is = 0; - if (!name || !answer) - return(-1); - - if ((_res.options & RES_INIT) == 0 && res_init() == -1) { + if ((!name || !answer) || ((_res.options & RES_INIT) == 0 && res_init() == -1)) { h_errno = NETDB_INTERNAL; return (-1); } @@ -1303,13 +1308,11 @@ int res_querydomain(name, domain, class, type, answer, anslen) const char *longname = nbuf; size_t n, d; - if (!name || !answer) - return(-1); - - if ((_res.options & RES_INIT) == 0 && res_init() == -1) { + if ((!name || !answer) || ((_res.options & RES_INIT) == 0 && res_init() == -1)) { h_errno = NETDB_INTERNAL; return (-1); } + #ifdef DEBUG if (_res.options & RES_DEBUG) printf(";; res_querydomain(%s, %s, %d, %d)\n", @@ -1854,7 +1857,9 @@ int gethostbyname_r(const char * name, int __nameserversXX; char ** __nameserverXX; - __open_nameservers(); + if (__open_nameservers()) { + return(-1); + } *result=NULL; if (!name) @@ -2010,7 +2015,9 @@ int gethostbyname2_r(const char *name, int family, if (family != AF_INET6) return EINVAL; - __open_nameservers(); + if (__open_nameservers()) { + return(-1); + } *result=NULL; if (!name) @@ -2178,7 +2185,9 @@ int gethostbyaddr_r (const void *addr, socklen_t len, int type, return i; } - __open_nameservers(); + if (__open_nameservers()) { + return(-1); + } #ifdef __UCLIBC_HAS_IPV6__ qp=buf; |