/* crypto/bio/b_sock.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include #include #include #define USE_SOCKETS #include "cryptlib.h" #include #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK) #include "netdb.h" #endif #ifndef OPENSSL_NO_SOCK #include #define SOCKET_PROTOCOL IPPROTO_TCP #ifdef SO_MAXCONN #define MAX_LISTEN SO_MAXCONN #elif defined(SOMAXCONN) #define MAX_LISTEN SOMAXCONN #else #define MAX_LISTEN 32 #endif #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)) static int wsa_init_done=0; #endif #if 0 static unsigned long BIO_ghbn_hits=0L; static unsigned long BIO_ghbn_miss=0L; #define GHBN_NUM 4 static struct ghbn_cache_st { char name[129]; struct hostent *ent; unsigned long order; } ghbn_cache[GHBN_NUM]; #endif static int get_ip(const char *str,unsigned char *ip); #if 0 static void ghbn_free(struct hostent *a); static struct hostent *ghbn_dup(struct hostent *a); #endif int BIO_get_host_ip(const char *str, unsigned char *ip) { int i; int err = 1; int locked = 0; struct hostent *he; i=get_ip(str,ip); if (i < 0) { BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS); goto err; } /* At this point, we have something that is most probably correct in some way, so let's init the socket. */ if (BIO_sock_init() != 1) return 0; /* don't generate another error code here */ /* If the string actually contained an IP address, we need not do anything more */ if (i > 0) return(1); /* do a gethostbyname */ CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME); locked = 1; he=BIO_gethostbyname(str); if (he == NULL) { BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP); goto err; } /* cast to short because of win16 winsock definition */ if ((short)he->h_addrtype != AF_INET) { BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET); goto err; } for (i=0; i<4; i++) ip[i]=he->h_addr_list[0][i]; err = 0; err: if (locked) CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); if (err) { ERR_add_error_data(2,"host=",str); return 0; } else return 1; } int BIO_get_port(const char *str, unsigned short *port_ptr) { int i; struct servent *s; if (str == NULL) { BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED); return(0); } i=atoi(str); if (i != 0) *port_ptr=(unsigned short)i; else { CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME); /* Note: under VMS with SOCKETSHR, it seems like the first * parameter is 'char *', instead of 'const char *' */ s=getservbyname( #ifndef CONST_STRICT (char *) #endif str,"tcp"); if(s != NULL) *port_ptr=ntohs((unsigned short)s->s_port); CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME); if(s == NULL) { if (strcmp(str,"http") == 0) *port_ptr=80; else if (strcmp(str,"telnet") == 0) *port_ptr=23; else if (strcmp(str,"socks") == 0) *port_ptr=1080; else if (strcmp(str,"https") == 0) *port_ptr=443; else if (strcmp(str,"ssl") == 0) *port_ptr=443; else if (strcmp(str,"ftp") == 0) *port_ptr=21; else if (strcmp(str,"gopher") == 0) *port_ptr=70; #if 0 else if (strcmp(str,"wais") == 0) *port_ptr=21; #endif else { SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error()); ERR_add_error_data(3,"service='",str,"'"); return(0); } } } return(1); } int BIO_sock_error(int sock) { int j,i; int size; size=sizeof(int); /* Note: under Windows the third parameter is of type (char *) * whereas under other systems it is (void *) if you don't have * a cast it will choke the compiler: if you do have a cast then * you can either go for (char *) or (void *). */ i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size); if (i < 0) return(1); else return(j); } #if 0 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg) { int i; char **p; switch (cmd) { case BIO_GHBN_CTRL_HITS: return(BIO_ghbn_hits); /* break; */ case BIO_GHBN_CTRL_MISSES: return(BIO_ghbn_miss); /* break; */ case BIO_GHBN_CTRL_CACHE_SIZE: return(GHBN_NUM); /* break; */ case BIO_GHBN_CTRL_GET_ENTRY: if ((iarg >= 0) && (iarg 0)) { p=(char **)parg; if (p == NULL) return(0); *p=ghbn_cache[iarg].name; ghbn_cache[iarg].name[128]='\0'; return(1); } return(0); /* break; */ case BIO_GHBN_CTRL_FLUSH: for (i=0; ih_aliases[i] != NULL; i++) ; i++; ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *)); if (ret->h_aliases == NULL) goto err; memset(ret->h_aliases, 0, i*sizeof(char *)); for (i=0; a->h_addr_list[i] != NULL; i++) ; i++; ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *)); if (ret->h_addr_list == NULL) goto err; memset(ret->h_addr_list, 0, i*sizeof(char *)); j=strlen(a->h_name)+1; if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err; memcpy((char *)ret->h_name,a->h_name,j); for (i=0; a->h_aliases[i] != NULL; i++) { j=strlen(a->h_aliases[i])+1; if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err; memcpy(ret->h_aliases[i],a->h_aliases[i],j); } ret->h_length=a->h_length; ret->h_addrtype=a->h_addrtype; for (i=0; a->h_addr_list[i] != NULL; i++) { if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL) goto err; memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length); } if (0) { err: if (ret != NULL) ghbn_free(ret); ret=NULL; } MemCheck_on(); return(ret); } static void ghbn_free(struct hostent *a) { int i; if(a == NULL) return; if (a->h_aliases != NULL) { for (i=0; a->h_aliases[i] != NULL; i++) OPENSSL_free(a->h_aliases[i]); OPENSSL_free(a->h_aliases); } if (a->h_addr_list != NULL) { for (i=0; a->h_addr_list[i] != NULL; i++) OPENSSL_free(a->h_addr_list[i]); OPENSSL_free(a->h_addr_list); } if (a->h_name != NULL) OPENSSL_free(a->h_name); OPENSSL_free(a); } #endif struct hostent *BIO_gethostbyname(const char *name) { #if 1 /* Caching gethostbyname() results forever is wrong, * so we have to let the true gethostbyname() worry about this */ return gethostbyname(name); #else struct hostent *ret; int i,lowi=0,j; unsigned long low= (unsigned long)-1; # if 0 /* It doesn't make sense to use locking here: The function interface * is not thread-safe, because threads can never be sure when * some other thread destroys the data they were given a pointer to. */ CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME); # endif j=strlen(name); if (j < 128) { for (i=0; i ghbn_cache[i].order) { low=ghbn_cache[i].order; lowi=i; } if (ghbn_cache[i].order > 0) { if (strncmp(name,ghbn_cache[i].name,128) == 0) break; } } } else i=GHBN_NUM; if (i == GHBN_NUM) /* no hit*/ { BIO_ghbn_miss++; /* Note: under VMS with SOCKETSHR, it seems like the first * parameter is 'char *', instead of 'const char *' */ ret=gethostbyname( # ifndef CONST_STRICT (char *) # endif name); if (ret == NULL) goto end; if (j > 128) /* too big to cache */ { # if 0 /* If we were trying to make this function thread-safe (which * is bound to fail), we'd have to give up in this case * (or allocate more memory). */ ret = NULL; # endif goto end; } /* else add to cache */ if (ghbn_cache[lowi].ent != NULL) ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */ ghbn_cache[lowi].name[0] = '\0'; if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL) { BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE); goto end; } strncpy(ghbn_cache[lowi].name,name,128); ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits; } else { BIO_ghbn_hits++; ret= ghbn_cache[i].ent; ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits; } end: # if 0 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); # endif return(ret); #endif } int BIO_sock_init(void) { #ifdef OPENSSL_SYS_WINDOWS static struct WSAData wsa_state; if (!wsa_init_done) { int err; #ifdef SIGINT signal(SIGINT,(void (*)(int))BIO_sock_cleanup); #endif wsa_init_done=1; memset(&wsa_state,0,sizeof(wsa_state)); /* Not making wsa_state available to the rest of the * code is formally wrong. But the structures we use * are [beleived to be] invariable among Winsock DLLs, * while API availability is [expected to be] probed * at run-time with DSO_global_lookup. */ if (WSAStartup(0x0202,&wsa_state)!=0) { err=WSAGetLastError(); SYSerr(SYS_F_WSASTARTUP,err); BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP); return(-1); } } #endif /* OPENSSL_SYS_WINDOWS */ #ifdef WATT32 extern int _watt_do_exit; _watt_do_exit = 0; /* don't make sock_init() call exit() */ if (sock_init()) return (-1); #endif #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK) WORD wVerReq; WSADATA wsaData; int err; if (!wsa_init_done) { # ifdef SIGINT signal(SIGINT,(void (*)(int))BIO_sock_cleanup); # endif wsa_init_done=1; wVerReq = MAKEWORD( 2, 0 ); err = WSAStartup(wVerReq,&wsaData); if (err != 0) { SYSerr(SYS_F_WSASTARTUP,err); BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP); return(-1); } } #endif return(1); } void BIO_sock_cleanup(void) { #ifdef OPENSSL_SYS_WINDOWS if (wsa_init_done) { wsa_init_done=0; #ifndef OPENSSL_SYS_WINCE WSACancelBlockingCall(); #endif WSACleanup(); } #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK) if (wsa_init_done) { wsa_init_done=0; WSACleanup(); } #endif } #if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000 int BIO_socket_ioctl(int fd, long type, void *arg) { int i; #ifdef __DJGPP__ i=ioctlsocket(fd,type,(char *)arg); #else i=ioctlsocket(fd,type,arg); #endif /* __DJGPP__ */ if (i < 0) SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error()); return(i); } #endif /* __VMS_VER */ /* The reason I have implemented this instead of using sscanf is because * Visual C 1.52c gives an unresolved external when linking a DLL :-( */ static int get_ip(const char *str, unsigned char ip[4]) { unsigned int tmp[4]; int num=0,c,ok=0; tmp[0]=tmp[1]=tmp[2]=tmp[3]=0; for (;;) { c= *(str++); if ((c >= '0') && (c <= '9')) { ok=1; tmp[num]=tmp[num]*10+c-'0'; if (tmp[num] > 255) return(0); } else if (c == '.') { if (!ok) return(-1); if (num == 3) return(0); num++; ok=0; } else if (c == '\0' && (num == 3) && ok) break; else return(0); } ip[0]=tmp[0]; ip[1]=tmp[1]; ip[2]=tmp[2]; ip[3]=tmp[3]; return(1); } int BIO_get_accept_socket(char *host, int bind_mode) { int ret=0; struct sockaddr server,client; struct sockaddr_in *sa_in; int s=INVALID_SOCKET,cs; unsigned char ip[4]; unsigned short port; char *str=NULL,*e; char *h,*p; unsigned long l; int err_num; if (BIO_sock_init() != 1) return(INVALID_SOCKET); if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET); h=p=NULL; h=str; for (e=str; *e; e++) { if (*e == ':') { p=e; } else if (*e == '/') { *e='\0'; break; } } if (p) *p++='\0'; /* points at last ':', '::port' is special [see below] */ else p=h,h=NULL; #ifdef EAI_FAMILY do { static union { void *p; int (*f)(const char *,const char *, const struct addrinfo *, struct addrinfo **); } p_getaddrinfo = {NULL}; static union { void *p; void (*f)(struct addrinfo *); } p_freeaddrinfo = {NULL}; struct addrinfo *res,hint; if (p_getaddrinfo.p==NULL) { if ((p_getaddrinfo.p=DSO_global_lookup("getaddrinfo"))==NULL || (p_freeaddrinfo.p=DSO_global_lookup("freeaddrinfo"))==NULL) p_getaddrinfo.p=(void*)-1; } if (p_getaddrinfo.p==(void *)-1) break; /* '::port' enforces IPv6 wildcard listener. Some OSes, * e.g. Solaris, default to IPv6 without any hint. Also * note that commonly IPv6 wildchard socket can service * IPv4 connections just as well... */ memset(&hint,0,sizeof(hint)); if (h) { if (strchr(h,':')) { if (h[1]=='\0') h=NULL; #ifdef AF_INET6 hint.ai_family = AF_INET6; #else h=NULL; #endif } else if (h[0]=='*' && h[1]=='\0') h=NULL; } if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break; server = *res->ai_addr; (*p_freeaddrinfo.f)(res); goto again; } while (0); #endif if (!BIO_get_port(p,&port)) goto err; memset((char *)&server,0,sizeof(server)); sa_in = (struct sockaddr_in *)&server; sa_in->sin_family=AF_INET; sa_in->sin_port=htons(port); if (h == NULL || strcmp(h,"*") == 0) sa_in->sin_addr.s_addr=INADDR_ANY; else { if (!BIO_get_host_ip(h,&(ip[0]))) goto err; l=(unsigned long) ((unsigned long)ip[0]<<24L)| ((unsigned long)ip[1]<<16L)| ((unsigned long)ip[2]<< 8L)| ((unsigned long)ip[3]); sa_in->sin_addr.s_addr=htonl(l); } again: s=socket(server.sa_family,SOCK_STREAM,SOCKET_PROTOCOL); if (s == INVALID_SOCKET) { SYSerr(SYS_F_SOCKET,get_last_socket_error()); ERR_add_error_data(3,"port='",host,"'"); BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET); goto err; } #ifdef SO_REUSEADDR if (bind_mode == BIO_BIND_REUSEADDR) { int i=1; ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i)); bind_mode=BIO_BIND_NORMAL; } #endif if (bind(s,&server,sizeof(server)) == -1) { #ifdef SO_REUSEADDR err_num=get_last_socket_error(); if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) && (err_num == EADDRINUSE)) { client = server; if (h == NULL || strcmp(h,"*") == 0) { #ifdef AF_INET6 if (client.sa_family == AF_INET6) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&client; memset(&sin6->sin6_addr,0,sizeof(sin6->sin6_addr)); sin6->sin6_addr.s6_addr[15]=1; } else #endif if (client.sa_family == AF_INET) { struct sockaddr_in *sin6 = (struct sockaddr_in *)&client; sin6->sin_addr.s_addr=htonl(0x7F000001); } else goto err; } cs=socket(client.sa_family,SOCK_STREAM,SOCKET_PROTOCOL); if (cs != INVALID_SOCKET) { int ii; ii=connect(cs,(struct sockaddr *)&client, sizeof(client)); closesocket(cs); if (ii == INVALID_SOCKET) { bind_mode=BIO_BIND_REUSEADDR; closesocket(s); goto again; } /* else error */ } /* else error */ } #endif SYSerr(SYS_F_BIND,err_num); ERR_add_error_data(3,"port='",host,"'"); BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET); goto err; } if (listen(s,MAX_LISTEN) == -1) { SYSerr(SYS_F_BIND,get_last_socket_error()); ERR_add_error_data(3,"port='",host,"'"); BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET); goto err; } ret=1; err: if (str != NULL) OPENSSL_free(str); if ((ret == 0) && (s != INVALID_SOCKET)) { closesocket(s); s= INVALID_SOCKET; } return(s); } int BIO_accept(int sock, char **addr) { int ret=INVALID_SOCKET; struct sockaddr from; struct sockaddr_in *sa_in; unsigned long l; unsigned short port; int len; char *p; memset(&from,0,sizeof(from)); len=sizeof(from); /* Note: under VMS with SOCKETSHR the fourth parameter is currently * of type (int *) whereas under other systems it is (void *) if * you don't have a cast it will choke the compiler: if you do * have a cast then you can either go for (int *) or (void *). */ ret=accept(sock,&from,(void *)&len); if (ret == INVALID_SOCKET) { if(BIO_sock_should_retry(ret)) return -2; SYSerr(SYS_F_ACCEPT,get_last_socket_error()); BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR); goto end; } if (addr == NULL) goto end; #ifdef EAI_FAMILY # ifdef OPENSSL_SYS_VMS # define SOCKLEN_T size_t # else # define SOCKLEN_T socklen_t #endif do { char h[NI_MAXHOST],s[NI_MAXSERV]; size_t nl; static union { void *p; int (*f)(const struct sockaddr *,SOCKLEN_T, char *,size_t,char *,size_t,int); } p_getnameinfo = {NULL}; if (p_getnameinfo.p==NULL) { if ((p_getnameinfo.p=DSO_global_lookup("getnameinfo"))==NULL) p_getnameinfo.p=(void*)-1; } if (p_getnameinfo.p==(void *)-1) break; if ((*p_getnameinfo.f)(&from,sizeof(from),h,sizeof(h),s,sizeof(s), NI_NUMERICHOST|NI_NUMERICSERV)) break; nl = strlen(h)+strlen(s)+2; if (len<24) len=24; p = *addr; if (p) { *p = '\0'; p = OPENSSL_realloc(p,nl); } else { p = OPENSSL_malloc(nl); } if (p==NULL) { BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); goto end; } *addr = p; BIO_snprintf(*addr,nl,"%s:%s",h,s); goto end; } while(0); #endif if (from.sa_family != AF_INET) goto end; sa_in = (struct sockaddr_in *)&from; l=ntohl(sa_in->sin_addr.s_addr); port=ntohs(sa_in->sin_port); if (*addr == NULL) { if ((p=OPENSSL_malloc(24)) == NULL) { BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); goto end; } *addr=p; } BIO_snprintf(*addr,24,"%d.%d.%d.%d:%d", (unsigned char)(l>>24L)&0xff, (unsigned char)(l>>16L)&0xff, (unsigned char)(l>> 8L)&0xff, (unsigned char)(l )&0xff, port); end: return(ret); } int BIO_set_tcp_ndelay(int s, int on) { int ret=0; #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP)) int opt; #ifdef SOL_TCP opt=SOL_TCP; #else #ifdef IPPROTO_TCP opt=IPPROTO_TCP; #endif #endif ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on)); #endif return(ret == 0); } #endif int BIO_socket_nbio(int s, int mode) { int ret= -1; int l; l=mode; #ifdef FIONBIO ret=BIO_socket_ioctl(s,FIONBIO,&l); #endif return(ret == 0); }