diff options
Diffstat (limited to 'libbb/inet_common.c')
| -rw-r--r-- | libbb/inet_common.c | 84 |
1 files changed, 33 insertions, 51 deletions
diff --git a/libbb/inet_common.c b/libbb/inet_common.c index b3e0802..5b4a4a1 100644 --- a/libbb/inet_common.c +++ b/libbb/inet_common.c @@ -32,14 +32,12 @@ int FAST_FUNC INET_resolve(const char *name, struct sockaddr_in *s_in, int hostf return 0; } /* If we expect this to be a hostname, try hostname database first */ -#ifdef DEBUG if (hostfirst) { +#ifdef DEBUG bb_error_msg("gethostbyname(%s)", name); - } #endif - if (hostfirst) { hp = gethostbyname(name); - if (hp != NULL) { + if (hp) { memcpy(&s_in->sin_addr, hp->h_addr_list[0], sizeof(struct in_addr)); return 0; @@ -51,7 +49,7 @@ int FAST_FUNC INET_resolve(const char *name, struct sockaddr_in *s_in, int hostf bb_error_msg("getnetbyname(%s)", name); #endif np = getnetbyname(name); - if (np != NULL) { + if (np) { s_in->sin_addr.s_addr = htonl(np->n_net); return 1; } @@ -66,7 +64,7 @@ int FAST_FUNC INET_resolve(const char *name, struct sockaddr_in *s_in, int hostf bb_error_msg("gethostbyname(%s)", name); #endif hp = gethostbyname(name); - if (hp == NULL) { + if (!hp) { return -1; } memcpy(&s_in->sin_addr, hp->h_addr_list[0], sizeof(struct in_addr)); @@ -74,7 +72,7 @@ int FAST_FUNC INET_resolve(const char *name, struct sockaddr_in *s_in, int hostf } -/* numeric: & 0x8000: default instead of *, +/* numeric: & 0x8000: "default" instead of "*", * & 0x4000: host instead of net, * & 0x0fff: don't resolve */ @@ -83,16 +81,16 @@ char* FAST_FUNC INET_rresolve(struct sockaddr_in *s_in, int numeric, uint32_t ne /* addr-to-name cache */ struct addr { struct addr *next; - struct sockaddr_in addr; - int host; + uint32_t nip; + smallint is_host; char name[1]; }; static struct addr *cache = NULL; struct addr *pn; char *name; - uint32_t ad, host_ad; - int host = 0; + uint32_t nip; + smallint is_host; if (s_in->sin_family != AF_INET) { #ifdef DEBUG @@ -102,61 +100,57 @@ char* FAST_FUNC INET_rresolve(struct sockaddr_in *s_in, int numeric, uint32_t ne errno = EAFNOSUPPORT; return NULL; } - ad = s_in->sin_addr.s_addr; + nip = s_in->sin_addr.s_addr; #ifdef DEBUG - bb_error_msg("rresolve: %08x, mask %08x, num %08x", (unsigned)ad, netmask, numeric); + bb_error_msg("rresolve: %08x mask:%08x num:%08x", (unsigned)nip, netmask, numeric); #endif - if (ad == INADDR_ANY) { - if ((numeric & 0x0FFF) == 0) { - if (numeric & 0x8000) - return xstrdup("default"); - return xstrdup("*"); - } - } if (numeric & 0x0FFF) - return xstrdup(inet_ntoa(s_in->sin_addr)); + return xmalloc_sockaddr2dotted_noport((void*)s_in); + if (nip == INADDR_ANY) { + if (numeric & 0x8000) + return xstrdup("default"); + return xstrdup("*"); + } + + is_host = ((nip & (~netmask)) != 0 || (numeric & 0x4000)); - if ((ad & (~netmask)) != 0 || (numeric & 0x4000)) - host = 1; pn = cache; while (pn) { - if (pn->addr.sin_addr.s_addr == ad && pn->host == host) { + if (pn->nip == nip && pn->is_host == is_host) { #ifdef DEBUG bb_error_msg("rresolve: found %s %08x in cache", - (host ? "host" : "net"), (unsigned)ad); + (is_host ? "host" : "net"), (unsigned)nip); #endif return xstrdup(pn->name); } pn = pn->next; } - host_ad = ntohl(ad); name = NULL; - if (host) { - struct hostent *ent; + if (is_host) { #ifdef DEBUG - bb_error_msg("gethostbyaddr (%08x)", (unsigned)ad); + bb_error_msg("sockaddr2host_noport(%08x)", (unsigned)nip); #endif - ent = gethostbyaddr((char *) &ad, 4, AF_INET); - if (ent) - name = xstrdup(ent->h_name); + name = xmalloc_sockaddr2host_noport((void*)s_in); } else if (ENABLE_FEATURE_ETC_NETWORKS) { struct netent *np; #ifdef DEBUG - bb_error_msg("getnetbyaddr (%08x)", (unsigned)host_ad); + bb_error_msg("getnetbyaddr(%08x)", (unsigned)ntohl(nip)); #endif - np = getnetbyaddr(host_ad, AF_INET); + np = getnetbyaddr(ntohl(nip), AF_INET); if (np) name = xstrdup(np->n_name); } if (!name) - name = xstrdup(inet_ntoa(s_in->sin_addr)); + name = xmalloc_sockaddr2dotted_noport((void*)s_in); + pn = xmalloc(sizeof(*pn) + strlen(name)); /* no '+ 1', it's already accounted for */ pn->next = cache; - pn->addr = *s_in; - pn->host = host; + pn->nip = nip; + pn->is_host = is_host; strcpy(pn->name, name); cache = pn; + return name; } @@ -188,9 +182,6 @@ int FAST_FUNC INET6_resolve(const char *name, struct sockaddr_in6 *sin6) char* FAST_FUNC INET6_rresolve(struct sockaddr_in6 *sin6, int numeric) { - char name[128]; - int s; - if (sin6->sin6_family != AF_INET6) { #ifdef DEBUG bb_error_msg("rresolve: unsupported address family %d!", @@ -200,8 +191,7 @@ char* FAST_FUNC INET6_rresolve(struct sockaddr_in6 *sin6, int numeric) return NULL; } if (numeric & 0x7FFF) { - inet_ntop(AF_INET6, &sin6->sin6_addr, name, sizeof(name)); - return xstrdup(name); + return xmalloc_sockaddr2dotted_noport((void*)sin6); } if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { if (numeric & 0x8000) @@ -209,15 +199,7 @@ char* FAST_FUNC INET6_rresolve(struct sockaddr_in6 *sin6, int numeric) return xstrdup("*"); } - s = getnameinfo((struct sockaddr *) sin6, sizeof(*sin6), - name, sizeof(name), - /*serv,servlen:*/ NULL, 0, - 0); - if (s != 0) { - bb_error_msg("getnameinfo failed"); - return NULL; - } - return xstrdup(name); + return xmalloc_sockaddr2host_noport((void*)sin6); } #endif /* CONFIG_FEATURE_IPV6 */ |