read the output of the helper

1 files changed, 53 insertions, 6 deletions

diff --git a/src/vpn/gnunet-daemon-vpn.c b/src/vpn/gnunet-daemon-vpn.c
index 299e60e19..875ebf018 100644
--- a/src/vpn/gnunet-daemon-vpn.c
+++ b/src/vpn/gnunet-daemon-vpn.c
@@ -27,6 +27,7 @@
 #include "gnunet_getopt_lib.h"
 #include "gnunet_program_lib.h"
 #include "gnunet_os_lib.h"
+#include "gnunet-vpn-helper-p.h"
 /* #include "gnunet_template_service.h" */
 
 /**
@@ -37,6 +38,9 @@ static int ret;
 struct vpn_cls {
         struct GNUNET_DISK_PipeHandle* helper_in;
         struct GNUNET_DISK_PipeHandle* helper_out;
+        const struct GNUNET_DISK_FileHandle* fh_from_helper;
+
+        struct GNUNET_SCHEDULER_Handle *sched; // TODO CG: is that right? Do I have to carry it around myself?
 
         pid_t helper_pid;
 };
@@ -50,6 +54,47 @@ static void cleanup(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tskctx
 }
 
 static void helper_read(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tsdkctx) {
+        struct vpn_cls* mycls = (struct vpn_cls*) cls;
+        struct suid_packet_header hdr = { .size = 0 };
+
+        int r = 0;
+
+        while (r < sizeof(struct suid_packet_header)) {
+                int t = GNUNET_DISK_file_read(mycls->fh_from_helper, &hdr, sizeof(struct suid_packet_header));
+                if (t< 0) {
+                        fprintf(stderr, "Read error for header: %m\n");
+                        return;
+                }
+                r += t;
+        }
+
+        fprintf(stderr, "Read %d bytes for the header. The 'size' is %x, that is %d\n", r, hdr.size, ntohl(hdr.size));
+
+        struct suid_packet *pkt = (struct suid_packet*) GNUNET_malloc(ntohl(hdr.size));
+
+        if (memcpy(pkt, &hdr, sizeof(struct suid_packet_header)) < 0) {
+                fprintf(stderr, "Memcpy: %m\n");
+                return;
+        }
+
+        while (r < ntohl(pkt->hdr.size)) {
+                int t = GNUNET_DISK_file_read(mycls->fh_from_helper, (unsigned char*)pkt + r, ntohl(pkt->hdr.size) - r);
+                if (t< 0) {
+                        fprintf(stderr, "Read error for data: %m\n");
+                        return;
+                }
+                r += t;
+        }
+
+        printf("read %d bytes. The first 87 are:\n\t", r);
+
+        for (r = 0; r < 87; r++)
+                printf("%02x ", pkt->data[r]);
+        printf("\n");
+
+        GNUNET_free(pkt);
+
+        GNUNET_SCHEDULER_add_read_file (mycls->sched, GNUNET_TIME_UNIT_FOREVER_REL, mycls->fh_from_helper, &helper_read, mycls);
 }
 
 /**
@@ -63,13 +108,15 @@ static void helper_read(void* cls, const struct GNUNET_SCHEDULER_TaskContext* ts
  */
 static void
 run (void *cls,
-         struct GNUNET_SCHEDULER_Handle *sched,
-         char *const *args,
-         const char *cfgfile,
-         const struct GNUNET_CONFIGURATION_Handle *cfg) {
+                struct GNUNET_SCHEDULER_Handle *sched,
+                char *const *args,
+                const char *cfgfile,
+                const struct GNUNET_CONFIGURATION_Handle *cfg) {
 
         struct vpn_cls* mycls = (struct vpn_cls*) cls;
 
+        mycls->sched = sched;
+
         GNUNET_SCHEDULER_add_delayed(sched, GNUNET_TIME_UNIT_FOREVER_REL, &cleanup, cls);
 
         mycls->helper_in = GNUNET_DISK_pipe(1);
@@ -77,9 +124,9 @@ run (void *cls,
 
         mycls->helper_pid = GNUNET_OS_start_process(mycls->helper_in, mycls->helper_out, "gnunet-vpn-helper", "gnunet-vpn-helper", NULL);
 
-        const struct GNUNET_DISK_FileHandle* fh = GNUNET_DISK_pipe_handle (mycls->helper_out, GNUNET_DISK_PIPE_END_READ);
+        mycls->fh_from_helper = GNUNET_DISK_pipe_handle (mycls->helper_out, GNUNET_DISK_PIPE_END_READ);
         
-        GNUNET_SCHEDULER_add_read_file (sched, GNUNET_TIME_UNIT_FOREVER_REL, fh, &helper_read, mycls);
+        GNUNET_SCHEDULER_add_read_file (sched, GNUNET_TIME_UNIT_FOREVER_REL, mycls->fh_from_helper, &helper_read, mycls);
 }