diff options
Diffstat (limited to 'crypto/openssl/demos/tunala/buffer.c')
| -rw-r--r-- | crypto/openssl/demos/tunala/buffer.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/crypto/openssl/demos/tunala/buffer.c b/crypto/openssl/demos/tunala/buffer.c deleted file mode 100644 index c5cd004209ad..000000000000 --- a/crypto/openssl/demos/tunala/buffer.c +++ /dev/null @@ -1,205 +0,0 @@ -#include "tunala.h" - -#ifndef NO_BUFFER - -void buffer_init(buffer_t *buf) -{ - buf->used = 0; - buf->total_in = buf->total_out = 0; -} - -void buffer_close(buffer_t *buf) -{ - /* Our data is static - nothing needs "release", just reset it */ - buf->used = 0; -} - -/* Code these simple ones in compact form */ -unsigned int buffer_used(buffer_t *buf) { - return buf->used; } -unsigned int buffer_unused(buffer_t *buf) { - return (MAX_DATA_SIZE - buf->used); } -int buffer_full(buffer_t *buf) { - return (buf->used == MAX_DATA_SIZE ? 1 : 0); } -int buffer_notfull(buffer_t *buf) { - return (buf->used < MAX_DATA_SIZE ? 1 : 0); } -int buffer_empty(buffer_t *buf) { - return (buf->used == 0 ? 1 : 0); } -int buffer_notempty(buffer_t *buf) { - return (buf->used > 0 ? 1 : 0); } -unsigned long buffer_total_in(buffer_t *buf) { - return buf->total_in; } -unsigned long buffer_total_out(buffer_t *buf) { - return buf->total_out; } - -/* These 3 static (internal) functions don't adjust the "total" variables as - * it's not sure when they're called how it should be interpreted. Only the - * higher-level "buffer_[to|from]_[fd|SSL|BIO]" functions should alter these - * values. */ -#if 0 /* To avoid "unused" warnings */ -static unsigned int buffer_adddata(buffer_t *buf, const unsigned char *ptr, - unsigned int size) -{ - unsigned int added = MAX_DATA_SIZE - buf->used; - if(added > size) - added = size; - if(added == 0) - return 0; - memcpy(buf->data + buf->used, ptr, added); - buf->used += added; - buf->total_in += added; - return added; -} - -static unsigned int buffer_tobuffer(buffer_t *to, buffer_t *from, int cap) -{ - unsigned int moved, tomove = from->used; - if((int)tomove > cap) - tomove = cap; - if(tomove == 0) - return 0; - moved = buffer_adddata(to, from->data, tomove); - if(moved == 0) - return 0; - buffer_takedata(from, NULL, moved); - return moved; -} -#endif - -static unsigned int buffer_takedata(buffer_t *buf, unsigned char *ptr, - unsigned int size) -{ - unsigned int taken = buf->used; - if(taken > size) - taken = size; - if(taken == 0) - return 0; - if(ptr) - memcpy(ptr, buf->data, taken); - buf->used -= taken; - /* Do we have to scroll? */ - if(buf->used > 0) - memmove(buf->data, buf->data + taken, buf->used); - return taken; -} - -#ifndef NO_IP - -int buffer_from_fd(buffer_t *buf, int fd) -{ - int toread = buffer_unused(buf); - if(toread == 0) - /* Shouldn't be called in this case! */ - abort(); - toread = read(fd, buf->data + buf->used, toread); - if(toread > 0) { - buf->used += toread; - buf->total_in += toread; - } - return toread; -} - -int buffer_to_fd(buffer_t *buf, int fd) -{ - int towrite = buffer_used(buf); - if(towrite == 0) - /* Shouldn't be called in this case! */ - abort(); - towrite = write(fd, buf->data, towrite); - if(towrite > 0) { - buffer_takedata(buf, NULL, towrite); - buf->total_out += towrite; - } - return towrite; -} - -#endif /* !defined(NO_IP) */ - -#ifndef NO_OPENSSL - -static void int_ssl_check(SSL *s, int ret) -{ - int e = SSL_get_error(s, ret); - switch(e) { - /* These seem to be harmless and already "dealt with" by our - * non-blocking environment. NB: "ZERO_RETURN" is the clean - * "error" indicating a successfully closed SSL tunnel. We let - * this happen because our IO loop should not appear to have - * broken on this condition - and outside the IO loop, the - * "shutdown" state is checked. */ - case SSL_ERROR_NONE: - case SSL_ERROR_WANT_READ: - case SSL_ERROR_WANT_WRITE: - case SSL_ERROR_WANT_X509_LOOKUP: - case SSL_ERROR_ZERO_RETURN: - return; - /* These seem to be indications of a genuine error that should - * result in the SSL tunnel being regarded as "dead". */ - case SSL_ERROR_SYSCALL: - case SSL_ERROR_SSL: - SSL_set_app_data(s, (char *)1); - return; - default: - break; - } - /* For any other errors that (a) exist, and (b) crop up - we need to - * interpret what to do with them - so "politely inform" the caller that - * the code needs updating here. */ - abort(); -} - -void buffer_from_SSL(buffer_t *buf, SSL *ssl) -{ - int ret; - if(!ssl || buffer_full(buf)) - return; - ret = SSL_read(ssl, buf->data + buf->used, buffer_unused(buf)); - if(ret > 0) { - buf->used += ret; - buf->total_in += ret; - } - if(ret < 0) - int_ssl_check(ssl, ret); -} - -void buffer_to_SSL(buffer_t *buf, SSL *ssl) -{ - int ret; - if(!ssl || buffer_empty(buf)) - return; - ret = SSL_write(ssl, buf->data, buf->used); - if(ret > 0) { - buffer_takedata(buf, NULL, ret); - buf->total_out += ret; - } - if(ret < 0) - int_ssl_check(ssl, ret); -} - -void buffer_from_BIO(buffer_t *buf, BIO *bio) -{ - int ret; - if(!bio || buffer_full(buf)) - return; - ret = BIO_read(bio, buf->data + buf->used, buffer_unused(buf)); - if(ret > 0) { - buf->used += ret; - buf->total_in += ret; - } -} - -void buffer_to_BIO(buffer_t *buf, BIO *bio) -{ - int ret; - if(!bio || buffer_empty(buf)) - return; - ret = BIO_write(bio, buf->data, buf->used); - if(ret > 0) { - buffer_takedata(buf, NULL, ret); - buf->total_out += ret; - } -} - -#endif /* !defined(NO_OPENSSL) */ - -#endif /* !defined(NO_BUFFER) */ |