AFG/dump1090
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Less buggy network requests parser.

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This commit is contained in:
antirez 2013-01-16 00:40:47 +01:00
parent dc91712741
commit e40e55bfe0
1 changed files with 9 additions and 6 deletions
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15
dump1090.c
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@ -91,7 +91,7 @@
struct client {
int fd; /* File descriptor. */
int service; /* TCP port the client is connected to. */
char buf[MODES_CLIENT_BUF_SIZE]; /* Read buffer. */
char buf[MODES_CLIENT_BUF_SIZE+1]; /* Read buffer. */
int buflen; /* Amount of data on buffer. */
};
@ -1987,13 +1987,13 @@ void modesReadFromClient(struct client *c, char *sep,
int(*handler)(struct client *))
{
while(1) {
int left = sizeof(c->buf) - c->buflen;
int left = MODES_CLIENT_BUF_SIZE - c->buflen;
int nread = read(c->fd, c->buf+c->buflen, left);
int fullmsg = 0;
int i;
char *p;
if (nread < 0) {
if (nread <= 0) {
if (nread == 0 || errno != EAGAIN) {
/* Error, or end of file. */
modesFreeClient(c->fd);
@ -2002,10 +2002,13 @@ void modesReadFromClient(struct client *c, char *sep,
}
c->buflen += nread;
/* Always null-term so we are free to use strstr() */
c->buf[c->buflen] = '\0';
/* If there is a complete message there must be the separator 'sep'
* in the buffer, note that we full-scan the buffer at every read
* for simplicity. */
if ((p = strstr(c->buf, sep)) != NULL) {
while ((p = strstr(c->buf, sep)) != NULL) {
i = p - c->buf; /* Turn it as an index inside the buffer. */
c->buf[i] = '\0'; /* Te handler expects null terminated strings. */
/* Call the function to process the message. It returns 1
@ -2018,14 +2021,14 @@ void modesReadFromClient(struct client *c, char *sep,
i += strlen(sep); /* The separator is part of the previous msg. */
memmove(c->buf,c->buf+i,c->buflen-i);
c->buflen -= i;
c->buf[c->buflen] = '\0';
/* Maybe there are more messages inside the buffer.
* Start looping from the start again. */
i = -1;
fullmsg = 1;
}
/* If our buffer is full discard it, this is some badly
* formatted shit. */
if (c->buflen == sizeof(c->buf)) {
if (c->buflen == MODES_CLIENT_BUF_SIZE) {
c->buflen = 0;
/* If there is garbage, read more to discard it ASAP. */
continue;