X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/78139cd8c34cff7d71f9aead284b2ce4f95f78dd..3ca5c28cafade2c9e0ada4d5b30c1d9b1be32f4c:/sftp.c

diff --git a/sftp.c b/sftp.c
index 832dd948..78fbd325 100644
--- a/sftp.c
+++ b/sftp.c
@@ -62,7 +62,6 @@ static struct sftp_packet *sftp_pkt_init(int pkt_type)
     pkt->length = 0;
     pkt->maxlen = 0;
     sftp_pkt_addbyte(pkt, (unsigned char) pkt_type);
-    fxp_error_message = NULL;
     return pkt;
 }
 static void sftp_pkt_addbool(struct sftp_packet *pkt, unsigned char value)
@@ -370,6 +369,10 @@ char *fxp_realpath(char *path)
     sftp_pkt_addstring_str(pktout, path);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return NULL;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x123) {
 	fxp_internal_error("request ID mismatch\n");
@@ -414,6 +417,10 @@ struct fxp_handle *fxp_open(char *path, int type)
     sftp_pkt_adduint32(pktout, 0);     /* (FIXME) empty ATTRS structure */
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return NULL;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x567) {
 	fxp_internal_error("request ID mismatch\n");
@@ -453,6 +460,10 @@ struct fxp_handle *fxp_opendir(char *path)
     sftp_pkt_addstring(pktout, path);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return NULL;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x456) {
 	fxp_internal_error("request ID mismatch\n");
@@ -493,6 +504,10 @@ void fxp_close(struct fxp_handle *handle)
     sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x789) {
 	fxp_internal_error("request ID mismatch\n");
@@ -514,6 +529,10 @@ int fxp_mkdir(char *path)
     sftp_pkt_adduint32(pktout, 0);     /* (FIXME) empty ATTRS structure */
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return 0;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x234) {
 	fxp_internal_error("request ID mismatch\n");
@@ -536,6 +555,10 @@ int fxp_rmdir(char *path)
     sftp_pkt_addstring(pktout, path);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return 0;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x345) {
 	fxp_internal_error("request ID mismatch\n");
@@ -558,6 +581,10 @@ int fxp_remove(char *fname)
     sftp_pkt_addstring(pktout, fname);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return 0;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x678) {
 	fxp_internal_error("request ID mismatch\n");
@@ -581,6 +608,10 @@ int fxp_rename(char *srcfname, char *dstfname)
     sftp_pkt_addstring(pktout, dstfname);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return 0;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x678) {
 	fxp_internal_error("request ID mismatch\n");
@@ -607,6 +638,10 @@ int fxp_stat(char *fname, struct fxp_attrs *attrs)
     sftp_pkt_addstring(pktout, fname);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return 0;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x678) {
 	fxp_internal_error("request ID mismatch\n");
@@ -633,6 +668,10 @@ int fxp_fstat(struct fxp_handle *handle, struct fxp_attrs *attrs)
     sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return 0;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x678) {
 	fxp_internal_error("request ID mismatch\n");
@@ -662,6 +701,10 @@ int fxp_setstat(char *fname, struct fxp_attrs attrs)
     sftp_pkt_addattrs(pktout, attrs);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return 0;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x678) {
 	fxp_internal_error("request ID mismatch\n");
@@ -685,6 +728,10 @@ int fxp_fsetstat(struct fxp_handle *handle, struct fxp_attrs attrs)
     sftp_pkt_addattrs(pktout, attrs);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return 0;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0x678) {
 	fxp_internal_error("request ID mismatch\n");
@@ -717,6 +764,10 @@ int fxp_read(struct fxp_handle *handle, char *buffer, uint64 offset,
     sftp_pkt_adduint32(pktout, len);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return -1;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0xBCD) {
 	fxp_internal_error("request ID mismatch");
@@ -756,6 +807,10 @@ struct fxp_names *fxp_readdir(struct fxp_handle *handle)
     sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return NULL;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0xABC) {
 	fxp_internal_error("request ID mismatch\n");
@@ -801,6 +856,10 @@ int fxp_write(struct fxp_handle *handle, char *buffer, uint64 offset,
     sftp_pkt_addstring_data(pktout, buffer, len);
     sftp_send(pktout);
     pktin = sftp_recv();
+    if (!pktin) {
+	fxp_internal_error("did not receive a valid SFTP packet\n");
+	return 0;
+    }
     id = sftp_pkt_getuint32(pktin);
     if (id != 0xDCB) {
 	fxp_internal_error("request ID mismatch\n");