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9b1d240c1f
We use a file descriptor, so when we consume an entry, we move past it
(and everyone shares a file offset, so this works).
The file contains packet names prefixed by - (treat fd as closed when
we try to write this packet), + (write the packet then ensure the file
descriptor fails), or @ ("lose" the packet then ensure the file
descriptor fails).
The sync and async peer-write functions hook this in automatically.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Header from folded patch 'test-run-cryptomsg__fix_compilation.patch':
test/run-cryptomsg: fix compilation.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
#include <assert.h>
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#include <ccan/err/err.h>
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#include <ccan/str/str.h>
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#include <lightningd/dev_disconnect.h>
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#include <stdlib.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <wire/gen_peer_wire.h>
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/* We move the fd IFF we do a disconnect. */
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static int dev_disconnect_fd = -1;
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static char dev_disconnect_line[200];
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void dev_disconnect_init(int fd)
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{
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int r;
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r = read(fd, dev_disconnect_line, sizeof(dev_disconnect_line)-1);
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if (r < 0)
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err(1, "Reading dev_disconnect file");
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lseek(fd, -r, SEEK_CUR);
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/* Get first line */
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dev_disconnect_line[r] = '\n';
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*strchr(dev_disconnect_line, '\n') = '\0';
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/* So we can move forward if we do use the line. */
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dev_disconnect_fd = fd;
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}
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char dev_disconnect(int pkt_type)
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{
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if (!streq(wire_type_name(pkt_type), dev_disconnect_line+1))
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return DEV_DISCONNECT_NORMAL;
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assert(dev_disconnect_fd != -1);
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lseek(dev_disconnect_fd, strlen(dev_disconnect_line)+1, SEEK_CUR);
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return dev_disconnect_line[0];
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}
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void dev_sabotage_fd(int fd)
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{
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int fds[2];
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if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) != 0)
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errx(1, "dev_sabotage_fd: creating socketpair");
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/* Close one. */
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close(fds[0]);
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/* Move other over to the fd we want to sabotage. */
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dup2(fds[1], fd);
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close(fds[1]);
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}
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