| /* 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.] |
| */ |
| |
| #ifndef NO_SOCK |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #define USE_SOCKETS |
| #include "cryptlib.h" |
| #include "bio.h" |
| |
| /* BIOerr(BIO_F_WSASTARTUP,BIO_R_WSASTARTUP ); */ |
| |
| #ifdef WIN16 |
| #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ |
| #else |
| #define SOCKET_PROTOCOL IPPROTO_TCP |
| #endif |
| |
| #ifdef SO_MAXCONN |
| #define MAX_LISTEN SOMAXCONN |
| #elif defined(SO_MAXCONN) |
| #define MAX_LISTEN SO_MAXCONN |
| #else |
| #define MAX_LISTEN 32 |
| #endif |
| |
| #ifdef WINDOWS |
| static int wsa_init_done=0; |
| #endif |
| |
| 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]; |
| |
| #ifndef NOPROTO |
| static int get_ip(const char *str,unsigned char *ip); |
| static void ghbn_free(struct hostent *a); |
| static struct hostent *ghbn_dup(struct hostent *a); |
| #else |
| static int get_ip(); |
| static void ghbn_free(); |
| static struct hostent *ghbn_dup(); |
| #endif |
| |
| int BIO_get_host_ip(const char *str, unsigned char *ip) |
| { |
| int i; |
| struct hostent *he; |
| |
| i=get_ip(str,ip); |
| if (i > 0) return(1); |
| if (i < 0) |
| { |
| BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS); |
| ERR_add_error_data(2,"host=",str); |
| return(0); |
| } |
| else |
| { /* do a gethostbyname */ |
| if (!BIO_sock_init()) return(0); |
| |
| he=BIO_gethostbyname(str); |
| if (he == NULL) |
| { |
| BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP); |
| ERR_add_error_data(2,"host=",str); |
| return(0); |
| } |
| |
| /* 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); |
| ERR_add_error_data(2,"host=",str); |
| return(0); |
| } |
| for (i=0; i<4; i++) |
| ip[i]=he->h_addr_list[0][i]; |
| } |
| 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 |
| { |
| s=getservbyname(str,"tcp"); |
| 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); |
| } |
| *port_ptr=htons((unsigned short)s->s_port); |
| } |
| return(1); |
| } |
| |
| int BIO_sock_error(int sock) |
| { |
| int j,i; |
| int size; |
| |
| size=sizeof(int); |
| |
| i=getsockopt(sock,SOL_SOCKET,SO_ERROR,&j,&size); |
| if (i < 0) |
| return(1); |
| else |
| return(j); |
| } |
| |
| 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 <GHBN_NUM) && |
| (ghbn_cache[iarg].order > 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; i<GHBN_NUM; i++) |
| ghbn_cache[i].order=0; |
| break; |
| default: |
| return(0); |
| } |
| return(1); |
| } |
| |
| static struct hostent *ghbn_dup(struct hostent *a) |
| { |
| struct hostent *ret; |
| int i,j; |
| |
| MemCheck_off(); |
| ret=(struct hostent *)Malloc(sizeof(struct hostent)); |
| if (ret == NULL) return(NULL); |
| memset(ret,0,sizeof(struct hostent)); |
| |
| for (i=0; a->h_aliases[i] != NULL; i++) |
| ; |
| i++; |
| ret->h_aliases=(char **)Malloc(sizeof(char *)*i); |
| memset(ret->h_aliases,0,sizeof(char *)*i); |
| if (ret == NULL) goto err; |
| |
| for (i=0; a->h_addr_list[i] != NULL; i++) |
| ; |
| i++; |
| ret->h_addr_list=(char **)Malloc(sizeof(char *)*i); |
| memset(ret->h_addr_list,0,sizeof(char *)*i); |
| if (ret->h_addr_list == NULL) goto err; |
| |
| j=strlen(a->h_name)+1; |
| if ((ret->h_name=Malloc(j)) == NULL) goto err; |
| memcpy((char *)ret->h_name,a->h_name,j+1); |
| for (i=0; a->h_aliases[i] != NULL; i++) |
| { |
| j=strlen(a->h_aliases[i])+1; |
| if ((ret->h_aliases[i]=Malloc(j)) == NULL) goto err; |
| memcpy(ret->h_aliases[i],a->h_aliases[i],j+1); |
| } |
| 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]=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++) |
| Free(a->h_aliases[i]); |
| Free(a->h_aliases); |
| } |
| if (a->h_addr_list != NULL) |
| { |
| for (i=0; a->h_addr_list[i] != NULL; i++) |
| Free(a->h_addr_list[i]); |
| Free(a->h_addr_list); |
| } |
| if (a->h_name != NULL) Free((char *)a->h_name); |
| Free(a); |
| } |
| |
| struct hostent *BIO_gethostbyname(const char *name) |
| { |
| struct hostent *ret; |
| int i,lowi=0,j; |
| unsigned long low= (unsigned long)-1; |
| |
| /* return(gethostbyname(name)); */ |
| |
| CRYPTO_w_lock(CRYPTO_LOCK_BIO_GETHOSTBYNAME); |
| j=strlen(name); |
| if (j < 128) |
| { |
| for (i=0; i<GHBN_NUM; i++) |
| { |
| if (low > 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++; |
| ret=gethostbyname(name); |
| |
| if (ret == NULL) return(NULL); |
| if (j > 128) return(ret); /* too big to cache */ |
| |
| /* else add to cache */ |
| if (ghbn_cache[lowi].ent != NULL) |
| ghbn_free(ghbn_cache[lowi].ent); |
| |
| strncpy(ghbn_cache[lowi].name,name,128); |
| ghbn_cache[lowi].ent=ghbn_dup(ret); |
| 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; |
| } |
| CRYPTO_w_unlock(CRYPTO_LOCK_BIO_GETHOSTBYNAME); |
| return(ret); |
| } |
| |
| int BIO_sock_init(void) |
| { |
| #ifdef 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)); |
| if (WSAStartup(0x0101,&wsa_state)!=0) |
| { |
| err=WSAGetLastError(); |
| SYSerr(SYS_F_WSASTARTUP,err); |
| BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP); |
| return(-1); |
| } |
| } |
| #endif /* WINDOWS */ |
| return(1); |
| } |
| |
| void BIO_sock_cleanup(void) |
| { |
| #ifdef WINDOWS |
| if (wsa_init_done) |
| { |
| wsa_init_done=0; |
| WSACancelBlockingCall(); |
| WSACleanup(); |
| } |
| #endif |
| } |
| |
| int BIO_socket_ioctl(int fd, long type, unsigned long *arg) |
| { |
| int i; |
| |
| i=ioctlsocket(fd,type,arg); |
| if (i < 0) |
| SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error()); |
| return(i); |
| } |
| |
| /* 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(-1); |
| } |
| else if (c == '.') |
| { |
| if (!ok) return(-1); |
| if (num == 3) break; |
| num++; |
| ok=0; |
| } |
| else if ((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_in server,client; |
| int s= -1,cs; |
| unsigned char ip[4]; |
| unsigned short port; |
| char *str,*e; |
| const char *h,*p; |
| unsigned long l; |
| int err_num; |
| |
| if (!BIO_sock_init()) 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[1]); |
| *e='\0'; |
| } |
| else if (*e == '/') |
| { |
| *e='\0'; |
| break; |
| } |
| } |
| |
| if (p == NULL) |
| { |
| p=h; |
| h="*"; |
| } |
| |
| if (!BIO_get_port(p,&port)) return(INVALID_SOCKET); |
| |
| memset((char *)&server,0,sizeof(server)); |
| server.sin_family=AF_INET; |
| server.sin_port=htons(port); |
| |
| if (strcmp(h,"*") == 0) |
| server.sin_addr.s_addr=INADDR_ANY; |
| else |
| { |
| if (!BIO_get_host_ip(h,&(ip[0]))) return(INVALID_SOCKET); |
| l=(unsigned long) |
| ((unsigned long)ip[0]<<24L)| |
| ((unsigned long)ip[1]<<16L)| |
| ((unsigned long)ip[2]<< 8L)| |
| ((unsigned long)ip[3]); |
| server.sin_addr.s_addr=htonl(l); |
| } |
| |
| again: |
| s=socket(AF_INET,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,(struct sockaddr *)&server,sizeof(server)) == -1) |
| { |
| #ifdef SO_REUSEADDR |
| err_num=get_last_socket_error(); |
| if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) && |
| (err_num == EADDRINUSE)) |
| { |
| memcpy((char *)&client,(char *)&server,sizeof(server)); |
| if (strcmp(h,"*") == 0) |
| client.sin_addr.s_addr=htonl(0x7F000001); |
| cs=socket(AF_INET,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) 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; |
| static struct sockaddr_in from; |
| unsigned long l; |
| unsigned short port; |
| int len; |
| char *p; |
| |
| memset((char *)&from,0,sizeof(from)); |
| len=sizeof(from); |
| ret=accept(sock,(struct sockaddr *)&from,&len); |
| if (ret == INVALID_SOCKET) |
| { |
| SYSerr(SYS_F_ACCEPT,get_last_socket_error()); |
| BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR); |
| goto end; |
| } |
| |
| if (addr == NULL) goto end; |
| |
| l=ntohl(from.sin_addr.s_addr); |
| port=ntohs(from.sin_port); |
| if (*addr == NULL) |
| { |
| if ((p=Malloc(24)) == NULL) |
| { |
| BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); |
| goto end; |
| } |
| *addr=p; |
| } |
| sprintf(*addr,"%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; |
| unsigned long l; |
| |
| l=mode; |
| #ifdef FIONBIO |
| ret=BIO_socket_ioctl(s,FIONBIO,&l); |
| #endif |
| return(ret == 0); |
| } |