From fbd76cd450e6675cbd5d48da3c53fa446b776475 Mon Sep 17 00:00:00 2001 From: Jonathan Tan Date: Wed, 16 Jan 2019 11:28:13 -0800 Subject: sideband: reverse its dependency on pkt-line A subsequent patch will teach struct packet_reader a new field that, if set, instructs it to interpret read data as multiplexed. This will create a dependency from pkt-line to sideband. To avoid a circular dependency, split recv_sideband() into 2 parts: the reading loop (left in recv_sideband()) and the processing of the contents (in demultiplex_sideband()), and move the former into pkt-line. This reverses the direction of dependency: sideband no longer depends on pkt-line, and pkt-line now depends on sideband. Signed-off-by: Jonathan Tan Signed-off-by: Junio C Hamano --- sideband.h | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) (limited to 'sideband.h') diff --git a/sideband.h b/sideband.h index 7a8146f161..2c4f021645 100644 --- a/sideband.h +++ b/sideband.h @@ -1,10 +1,28 @@ #ifndef SIDEBAND_H #define SIDEBAND_H -#define SIDEBAND_PROTOCOL_ERROR -2 -#define SIDEBAND_REMOTE_ERROR -1 +enum sideband_type { + SIDEBAND_PROTOCOL_ERROR = -2, + SIDEBAND_REMOTE_ERROR = -1, + SIDEBAND_FLUSH = 0, + SIDEBAND_PRIMARY = 1 +}; + +/* + * Inspects a multiplexed packet read from the remote. If this packet is a + * progress packet and thus should not be processed by the caller, returns 0. + * Otherwise, returns 1, releases scratch, and sets sideband_type. + * + * If this packet is SIDEBAND_PROTOCOL_ERROR, SIDEBAND_REMOTE_ERROR, or a + * progress packet, also prints a message to stderr. + * + * scratch must be a struct strbuf allocated by the caller. It is used to store + * progress messages split across multiple packets. + */ +int demultiplex_sideband(const char *me, char *buf, int len, + struct strbuf *scratch, + enum sideband_type *sideband_type); -int recv_sideband(const char *me, int in_stream, int out); void send_sideband(int fd, int band, const char *data, ssize_t sz, int packet_max); #endif -- cgit v1.2.3