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MINOR: peers: Extract some code to be reused.

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May be backported as far as 1.5.
This commit is contained in:
Frdric Lcaille 2019-01-21 13:38:06 +01:00 committed by Willy Tarreau
parent 9589c3bce7
commit ce02557aad
1 changed files with 53 additions and 70 deletions
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123
src/peers.c
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@ -561,6 +561,36 @@ static int peer_get_version(const char *str,
return 0;
}
/*
* Parse a line terminated by an optional '\r' character, followed by a mandatory
* '\n' character.
* Returns 1 if succeeded or 0 if a '\n' character could not be found, and -1 if
* a line could not be read because the communication channel is closed.
*/
static inline int peer_getline(struct appctx *appctx)
{
int n;
struct stream_interface *si = appctx->owner;
n = co_getline(si_oc(si), trash.area, trash.size);
if (!n)
return 0;
if (n < 0 || trash.area[n - 1] != '\n') {
appctx->st0 = PEER_SESS_ST_END;
return -1;
}
if (n > 1 && (trash.area[n - 2] == '\r'))
trash.area[n - 2] = 0;
else
trash.area[n - 1] = 0;
co_skip(si_oc(si), n);
return n;
}
/*
* IO Handler to handle message exchance with a peer
*/
@ -592,24 +622,13 @@ static void peer_io_handler(struct appctx *appctx)
/* fall through */
case PEER_SESS_ST_GETVERSION:
prev_state = appctx->st0;
reql = co_getline(si_oc(si), trash.area,
trash.size);
if (reql <= 0) { /* closed or EOL not found */
if (reql == 0)
goto out;
appctx->st0 = PEER_SESS_ST_END;
goto switchstate;
}
if (trash.area[reql-1] != '\n') {
appctx->st0 = PEER_SESS_ST_END;
goto switchstate;
}
else if (reql > 1 && (trash.area[reql-2] == '\r'))
trash.area[reql-2] = 0;
else
trash.area[reql-1] = 0;
co_skip(si_oc(si), reql);
reql = peer_getline(appctx);
if (!reql)
goto out;
if (reql < 0)
goto switchstate;
/* test protocol */
if (strncmp(PEER_SESSION_PROTO_NAME " ", trash.area, proto_len + 1) != 0) {
@ -628,24 +647,13 @@ static void peer_io_handler(struct appctx *appctx)
/* fall through */
case PEER_SESS_ST_GETHOST:
prev_state = appctx->st0;
reql = co_getline(si_oc(si), trash.area,
trash.size);
if (reql <= 0) { /* closed or EOL not found */
if (reql == 0)
goto out;
appctx->st0 = PEER_SESS_ST_END;
goto switchstate;
}
if (trash.area[reql-1] != '\n') {
appctx->st0 = PEER_SESS_ST_END;
goto switchstate;
}
else if (reql > 1 && (trash.area[reql-2] == '\r'))
trash.area[reql-2] = 0;
else
trash.area[reql-1] = 0;
co_skip(si_oc(si), reql);
reql = peer_getline(appctx);
if (!reql)
goto out;
if (reql < 0)
goto switchstate;
/* test hostname match */
if (strcmp(localpeer, trash.area) != 0) {
@ -660,25 +668,13 @@ static void peer_io_handler(struct appctx *appctx)
char *p;
prev_state = appctx->st0;
reql = co_getline(si_oc(si), trash.area,
trash.size);
if (reql <= 0) { /* closed or EOL not found */
if (reql == 0)
goto out;
appctx->st0 = PEER_SESS_ST_END;
goto switchstate;
}
if (trash.area[reql-1] != '\n') {
/* Incomplete line, we quit */
appctx->st0 = PEER_SESS_ST_END;
goto switchstate;
}
else if (reql > 1 && (trash.area[reql-2] == '\r'))
trash.area[reql-2] = 0;
else
trash.area[reql-1] = 0;
co_skip(si_oc(si), reql);
reql = peer_getline(appctx);
if (!reql)
goto out;
if (reql < 0)
goto switchstate;
/* parse line "<peer name> <pid> <relative_pid>" */
p = strchr(trash.area, ' ');
@ -852,25 +848,12 @@ static void peer_io_handler(struct appctx *appctx)
if (si_ic(si)->flags & CF_WRITE_PARTIAL)
curpeer->statuscode = PEER_SESS_SC_CONNECTEDCODE;
reql = co_getline(si_oc(si), trash.area,
trash.size);
if (reql <= 0) { /* closed or EOL not found */
if (reql == 0)
goto out;
appctx->st0 = PEER_SESS_ST_END;
goto switchstate;
}
if (trash.area[reql-1] != '\n') {
/* Incomplete line, we quit */
appctx->st0 = PEER_SESS_ST_END;
goto switchstate;
}
else if (reql > 1 && (trash.area[reql-2] == '\r'))
trash.area[reql-2] = 0;
else
trash.area[reql-1] = 0;
reql = peer_getline(appctx);
if (!reql)
goto out;
co_skip(si_oc(si), reql);
if (reql < 0)
goto switchstate;
/* Register status code */
curpeer->statuscode = atoi(trash.area);